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         read_lock_bh(&in6_dev->lock);
1102         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1103                 tmp.u.a6.addr = im6->mca_addr;
1104
1105                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1106                 if (ipm) {
1107                         /* for mcast, by-IP match means full match */
1108                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1109                         continue;
1110                 }
1111
1112                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1113                 if (!ipm)
1114                         continue;
1115
1116                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1117                          qeth_l3_ipaddr_hash(ipm));
1118
1119         }
1120         read_unlock_bh(&in6_dev->lock);
1121
1122 out:
1123         return 0;
1124 }
1125
1126 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1127                                    __be16 proto, u16 vid)
1128 {
1129         struct qeth_card *card = dev->ml_priv;
1130
1131         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
1132         return 0;
1133 }
1134
1135 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1136                                     __be16 proto, u16 vid)
1137 {
1138         struct qeth_card *card = dev->ml_priv;
1139
1140         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1141         return 0;
1142 }
1143
1144 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1145 {
1146         bool enable = card->dev->flags & IFF_PROMISC;
1147
1148         if (card->info.promisc_mode == enable)
1149                 return;
1150
1151         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1152                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1153                         qeth_setadp_promisc_mode(card, enable);
1154         } else if (card->options.sniffer &&     /* HiperSockets trace */
1155                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1156                 if (enable) {
1157                         QETH_CARD_TEXT(card, 3, "+promisc");
1158                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1159                 } else {
1160                         QETH_CARD_TEXT(card, 3, "-promisc");
1161                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1162                 }
1163         }
1164 }
1165
1166 static void qeth_l3_rx_mode_work(struct work_struct *work)
1167 {
1168         struct qeth_card *card = container_of(work, struct qeth_card,
1169                                               rx_mode_work);
1170         struct qeth_ipaddr *addr;
1171         struct hlist_node *tmp;
1172         int i, rc;
1173
1174         QETH_CARD_TEXT(card, 3, "setmulti");
1175
1176         if (!card->options.sniffer) {
1177                 rtnl_lock();
1178                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1179                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1180                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1181                 rtnl_unlock();
1182
1183                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1184                         switch (addr->disp_flag) {
1185                         case QETH_DISP_ADDR_DELETE:
1186                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1187                                 if (!rc || rc == -ENOENT) {
1188                                         hash_del(&addr->hnode);
1189                                         kfree(addr);
1190                                 }
1191                                 break;
1192                         case QETH_DISP_ADDR_ADD:
1193                                 rc = qeth_l3_register_addr_entry(card, addr);
1194                                 if (rc && rc != -ENETDOWN) {
1195                                         hash_del(&addr->hnode);
1196                                         kfree(addr);
1197                                         break;
1198                                 }
1199                                 fallthrough;
1200                         default:
1201                                 /* for next call to set_rx_mode(): */
1202                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1203                         }
1204                 }
1205         }
1206
1207         qeth_l3_set_promisc_mode(card);
1208 }
1209
1210 static int qeth_l3_arp_makerc(u16 rc)
1211 {
1212         switch (rc) {
1213         case IPA_RC_SUCCESS:
1214                 return 0;
1215         case QETH_IPA_ARP_RC_NOTSUPP:
1216         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1217                 return -EOPNOTSUPP;
1218         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1219                 return -EINVAL;
1220         case QETH_IPA_ARP_RC_Q_NO_DATA:
1221                 return -ENOENT;
1222         default:
1223                 return -EIO;
1224         }
1225 }
1226
1227 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1228                               unsigned long data)
1229 {
1230         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1231
1232         qeth_setassparms_cb(card, reply, data);
1233         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1234 }
1235
1236 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1237 {
1238         struct qeth_cmd_buffer *iob;
1239         int rc;
1240
1241         QETH_CARD_TEXT(card, 3, "arpstnoe");
1242
1243         /*
1244          * currently GuestLAN only supports the ARP assist function
1245          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1246          * thus we say EOPNOTSUPP for this ARP function
1247          */
1248         if (IS_VM_NIC(card))
1249                 return -EOPNOTSUPP;
1250         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1251                 return -EOPNOTSUPP;
1252         }
1253
1254         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1255                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1256                                        SETASS_DATA_SIZEOF(flags_32bit),
1257                                        QETH_PROT_IPV4);
1258         if (!iob)
1259                 return -ENOMEM;
1260
1261         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1262         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1263         if (rc)
1264                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1265                                  CARD_DEVID(card), rc);
1266         return rc;
1267 }
1268
1269 static __u32 get_arp_entry_size(struct qeth_card *card,
1270                         struct qeth_arp_query_data *qdata,
1271                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1272 {
1273         __u32 rc;
1274         __u8 is_hsi;
1275
1276         is_hsi = qdata->reply_bits == 5;
1277         if (type->ip == QETHARP_IP_ADDR_V4) {
1278                 QETH_CARD_TEXT(card, 4, "arpev4");
1279                 if (strip_entries) {
1280                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1281                                 sizeof(struct qeth_arp_qi_entry7_short);
1282                 } else {
1283                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1284                                 sizeof(struct qeth_arp_qi_entry7);
1285                 }
1286         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1287                 QETH_CARD_TEXT(card, 4, "arpev6");
1288                 if (strip_entries) {
1289                         rc = is_hsi ?
1290                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1291                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1292                 } else {
1293                         rc = is_hsi ?
1294                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1295                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1296                 }
1297         } else {
1298                 QETH_CARD_TEXT(card, 4, "arpinv");
1299                 rc = 0;
1300         }
1301
1302         return rc;
1303 }
1304
1305 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1306 {
1307         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1308                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1309 }
1310
1311 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1312                 struct qeth_reply *reply, unsigned long data)
1313 {
1314         struct qeth_ipa_cmd *cmd;
1315         struct qeth_arp_query_data *qdata;
1316         struct qeth_arp_query_info *qinfo;
1317         int e;
1318         int entrybytes_done;
1319         int stripped_bytes;
1320         __u8 do_strip_entries;
1321
1322         QETH_CARD_TEXT(card, 3, "arpquecb");
1323
1324         qinfo = (struct qeth_arp_query_info *) reply->param;
1325         cmd = (struct qeth_ipa_cmd *) data;
1326         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1327         if (cmd->hdr.return_code) {
1328                 QETH_CARD_TEXT(card, 4, "arpcberr");
1329                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1330                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1331         }
1332         if (cmd->data.setassparms.hdr.return_code) {
1333                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1334                 QETH_CARD_TEXT(card, 4, "setaperr");
1335                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1336                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1337         }
1338         qdata = &cmd->data.setassparms.data.query_arp;
1339         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1340
1341         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1342         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1343         entrybytes_done = 0;
1344         for (e = 0; e < qdata->no_entries; ++e) {
1345                 char *cur_entry;
1346                 __u32 esize;
1347                 struct qeth_arp_entrytype *etype;
1348
1349                 cur_entry = &qdata->data + entrybytes_done;
1350                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1351                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1352                         QETH_CARD_TEXT(card, 4, "pmis");
1353                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1354                         break;
1355                 }
1356                 esize = get_arp_entry_size(card, qdata, etype,
1357                         do_strip_entries);
1358                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1359                 if (!esize)
1360                         break;
1361
1362                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1363                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1364                         memset(qinfo->udata, 0, 4);
1365                         return -ENOSPC;
1366                 }
1367
1368                 memcpy(qinfo->udata + qinfo->udata_offset,
1369                         &qdata->data + entrybytes_done + stripped_bytes,
1370                         esize);
1371                 entrybytes_done += esize + stripped_bytes;
1372                 qinfo->udata_offset += esize;
1373                 ++qinfo->no_entries;
1374         }
1375         /* check if all replies received ... */
1376         if (cmd->data.setassparms.hdr.seq_no <
1377             cmd->data.setassparms.hdr.number_of_replies)
1378                 return 1;
1379         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1380         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1381         /* keep STRIP_ENTRIES flag so the user program can distinguish
1382          * stripped entries from normal ones */
1383         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1384                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1385         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1386         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1387         return 0;
1388 }
1389
1390 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1391         enum qeth_prot_versions prot,
1392         struct qeth_arp_query_info *qinfo)
1393 {
1394         struct qeth_cmd_buffer *iob;
1395         struct qeth_ipa_cmd *cmd;
1396         int rc;
1397
1398         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1399
1400         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1401                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1402                                        SETASS_DATA_SIZEOF(query_arp), prot);
1403         if (!iob)
1404                 return -ENOMEM;
1405         cmd = __ipa_cmd(iob);
1406         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1407         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1408         if (rc)
1409                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1410                                  CARD_DEVID(card), rc);
1411         return rc;
1412 }
1413
1414 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1415 {
1416         struct qeth_arp_query_info qinfo = {0, };
1417         int rc;
1418
1419         QETH_CARD_TEXT(card, 3, "arpquery");
1420
1421         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1422                                IPA_ARP_PROCESSING)) {
1423                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1424                 rc = -EOPNOTSUPP;
1425                 goto out;
1426         }
1427         /* get size of userspace buffer and mask_bits -> 6 bytes */
1428         if (copy_from_user(&qinfo, udata, 6)) {
1429                 rc = -EFAULT;
1430                 goto out;
1431         }
1432         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1433         if (!qinfo.udata) {
1434                 rc = -ENOMEM;
1435                 goto out;
1436         }
1437         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1438         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1439         if (rc) {
1440                 if (copy_to_user(udata, qinfo.udata, 4))
1441                         rc = -EFAULT;
1442                 goto free_and_out;
1443         }
1444         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1445                 /* fails in case of GuestLAN QDIO mode */
1446                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1447         }
1448         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1449                 QETH_CARD_TEXT(card, 4, "qactf");
1450                 rc = -EFAULT;
1451                 goto free_and_out;
1452         }
1453         QETH_CARD_TEXT(card, 4, "qacts");
1454
1455 free_and_out:
1456         kfree(qinfo.udata);
1457 out:
1458         return rc;
1459 }
1460
1461 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1462                                     struct qeth_arp_cache_entry *entry,
1463                                     enum qeth_arp_process_subcmds arp_cmd)
1464 {
1465         struct qeth_arp_cache_entry *cmd_entry;
1466         struct qeth_cmd_buffer *iob;
1467         int rc;
1468
1469         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1470                 QETH_CARD_TEXT(card, 3, "arpadd");
1471         else
1472                 QETH_CARD_TEXT(card, 3, "arpdel");
1473
1474         /*
1475          * currently GuestLAN only supports the ARP assist function
1476          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1477          * thus we say EOPNOTSUPP for this ARP function
1478          */
1479         if (IS_VM_NIC(card))
1480                 return -EOPNOTSUPP;
1481         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1482                 return -EOPNOTSUPP;
1483         }
1484
1485         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1486                                        SETASS_DATA_SIZEOF(arp_entry),
1487                                        QETH_PROT_IPV4);
1488         if (!iob)
1489                 return -ENOMEM;
1490
1491         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1492         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1493         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1494         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1495         if (rc)
1496                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1497                                  arp_cmd, CARD_DEVID(card), rc);
1498         return rc;
1499 }
1500
1501 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1502 {
1503         struct qeth_cmd_buffer *iob;
1504         int rc;
1505
1506         QETH_CARD_TEXT(card, 3, "arpflush");
1507
1508         /*
1509          * currently GuestLAN only supports the ARP assist function
1510          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1511          * thus we say EOPNOTSUPP for this ARP function
1512         */
1513         if (IS_VM_NIC(card) || IS_IQD(card))
1514                 return -EOPNOTSUPP;
1515         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1516                 return -EOPNOTSUPP;
1517         }
1518
1519         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1520                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1521                                        QETH_PROT_IPV4);
1522         if (!iob)
1523                 return -ENOMEM;
1524
1525         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1526         if (rc)
1527                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1528                                  CARD_DEVID(card), rc);
1529         return rc;
1530 }
1531
1532 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1533 {
1534         struct qeth_card *card = dev->ml_priv;
1535         struct qeth_arp_cache_entry arp_entry;
1536         enum qeth_arp_process_subcmds arp_cmd;
1537         int rc = 0;
1538
1539         switch (cmd) {
1540         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1541                 if (!capable(CAP_NET_ADMIN)) {
1542                         rc = -EPERM;
1543                         break;
1544                 }
1545                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1546                 break;
1547         case SIOC_QETH_ARP_QUERY_INFO:
1548                 if (!capable(CAP_NET_ADMIN)) {
1549                         rc = -EPERM;
1550                         break;
1551                 }
1552                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1553                 break;
1554         case SIOC_QETH_ARP_ADD_ENTRY:
1555         case SIOC_QETH_ARP_REMOVE_ENTRY:
1556                 if (!capable(CAP_NET_ADMIN))
1557                         return -EPERM;
1558                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1559                         return -EFAULT;
1560
1561                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1562                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1563                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1564                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1565         case SIOC_QETH_ARP_FLUSH_CACHE:
1566                 if (!capable(CAP_NET_ADMIN)) {
1567                         rc = -EPERM;
1568                         break;
1569                 }
1570                 rc = qeth_l3_arp_flush_cache(card);
1571                 break;
1572         default:
1573                 rc = -EOPNOTSUPP;
1574         }
1575         return rc;
1576 }
1577
1578 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1579                                      int ipv)
1580 {
1581         struct neighbour *n = NULL;
1582
1583         if (dst)
1584                 n = dst_neigh_lookup_skb(dst, skb);
1585
1586         if (n) {
1587                 int cast_type = n->type;
1588
1589                 neigh_release(n);
1590                 if ((cast_type == RTN_BROADCAST) ||
1591                     (cast_type == RTN_MULTICAST) ||
1592                     (cast_type == RTN_ANYCAST))
1593                         return cast_type;
1594                 return RTN_UNICAST;
1595         }
1596
1597         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1598         switch (ipv) {
1599         case 4:
1600                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1601                         return RTN_BROADCAST;
1602                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1603                                 RTN_MULTICAST : RTN_UNICAST;
1604         case 6:
1605                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1606                                 RTN_MULTICAST : RTN_UNICAST;
1607         default:
1608                 /* ... and MAC address */
1609                 return qeth_get_ether_cast_type(skb);
1610         }
1611 }
1612
1613 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1614 {
1615         int ipv = qeth_get_ip_version(skb);
1616         struct dst_entry *dst;
1617         int cast_type;
1618
1619         rcu_read_lock();
1620         dst = qeth_dst_check_rcu(skb, ipv);
1621         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1622         rcu_read_unlock();
1623
1624         return cast_type;
1625 }
1626
1627 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1628 {
1629         if (cast_type == RTN_MULTICAST)
1630                 return QETH_CAST_MULTICAST;
1631         if (cast_type == RTN_ANYCAST)
1632                 return QETH_CAST_ANYCAST;
1633         if (cast_type == RTN_BROADCAST)
1634                 return QETH_CAST_BROADCAST;
1635         return QETH_CAST_UNICAST;
1636 }
1637
1638 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1639                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1640                                 int ipv, unsigned int data_len)
1641 {
1642         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1643         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1644         struct qeth_card *card = queue->card;
1645         struct dst_entry *dst;
1646         int cast_type;
1647
1648         hdr->hdr.l3.length = data_len;
1649
1650         if (skb_is_gso(skb)) {
1651                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1652         } else {
1653                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1654
1655                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1656                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1657                         l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1658                         memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1659                                iucv_trans_hdr(skb)->destUserID, 8);
1660                         return;
1661                 }
1662
1663                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1664                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1665                         /* some HW requires combined L3+L4 csum offload: */
1666                         if (ipv == 4)
1667                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1668                 }
1669         }
1670
1671         if (ipv == 4 || IS_IQD(card)) {
1672                 /* NETIF_F_HW_VLAN_CTAG_TX */
1673                 if (skb_vlan_tag_present(skb)) {
1674                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1675                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1676                 }
1677         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1678                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1679                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1680         }
1681
1682         rcu_read_lock();
1683         dst = qeth_dst_check_rcu(skb, ipv);
1684
1685         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1686                 cast_type = RTN_UNICAST;
1687         else
1688                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1689         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1690
1691         if (ipv == 4) {
1692                 l3_hdr->next_hop.addr.s6_addr32[3] =
1693                                         qeth_next_hop_v4_rcu(skb, dst);
1694         } else if (ipv == 6) {
1695                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1696
1697                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1698                 if (!IS_IQD(card))
1699                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1700         } else {
1701                 /* OSA only: */
1702                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1703         }
1704         rcu_read_unlock();
1705 }
1706
1707 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1708 {
1709         struct iphdr *iph = ip_hdr(skb);
1710
1711         /* this is safe, IPv6 traffic takes a different path */
1712         if (skb->ip_summed == CHECKSUM_PARTIAL)
1713                 iph->check = 0;
1714         if (skb_is_gso(skb)) {
1715                 iph->tot_len = 0;
1716                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1717                                                     iph->daddr, 0);
1718         }
1719 }
1720
1721 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1722                         struct qeth_qdio_out_q *queue, int ipv)
1723 {
1724         unsigned int hw_hdr_len;
1725         int rc;
1726
1727         /* re-use the L2 header area for the HW header: */
1728         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1729                                        sizeof(struct qeth_hdr);
1730         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1731         if (rc)
1732                 return rc;
1733         skb_pull(skb, ETH_HLEN);
1734
1735         qeth_l3_fixup_headers(skb);
1736         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1737 }
1738
1739 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1740                                            struct net_device *dev)
1741 {
1742         struct qeth_card *card = dev->ml_priv;
1743         u16 txq = skb_get_queue_mapping(skb);
1744         int ipv = qeth_get_ip_version(skb);
1745         struct qeth_qdio_out_q *queue;
1746         int rc;
1747
1748         if (!skb_is_gso(skb))
1749                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1750         if (IS_IQD(card)) {
1751                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1752
1753                 if (card->options.sniffer)
1754                         goto tx_drop;
1755                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
1756                     (card->options.cq == QETH_CQ_ENABLED &&
1757                      skb->protocol != htons(ETH_P_AF_IUCV)))
1758                         goto tx_drop;
1759         } else {
1760                 queue = card->qdio.out_qs[txq];
1761         }
1762
1763         if (!(dev->flags & IFF_BROADCAST) &&
1764             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
1765                 goto tx_drop;
1766
1767         if (ipv == 4 || IS_IQD(card))
1768                 rc = qeth_l3_xmit(card, skb, queue, ipv);
1769         else
1770                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
1771
1772         if (!rc)
1773                 return NETDEV_TX_OK;
1774
1775 tx_drop:
1776         QETH_TXQ_STAT_INC(queue, tx_dropped);
1777         kfree_skb(skb);
1778         return NETDEV_TX_OK;
1779 }
1780
1781 static void qeth_l3_set_rx_mode(struct net_device *dev)
1782 {
1783         struct qeth_card *card = dev->ml_priv;
1784
1785         schedule_work(&card->rx_mode_work);
1786 }
1787
1788 /*
1789  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1790  * NOARP on the netdevice is no option because it also turns off neighbor
1791  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1792  * arp resolution but we want the hard header (packet socket will work
1793  * e.g. tcpdump)
1794  */
1795 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1796 {
1797         n->nud_state = NUD_NOARP;
1798         memcpy(n->ha, "FAKELL", 6);
1799         n->output = n->ops->connected_output;
1800         return 0;
1801 }
1802
1803 static int
1804 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1805 {
1806         if (np->tbl->family == AF_INET)
1807                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1808
1809         return 0;
1810 }
1811
1812 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1813                                                     struct net_device *dev,
1814                                                     netdev_features_t features)
1815 {
1816         if (qeth_get_ip_version(skb) != 4)
1817                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1818         return qeth_features_check(skb, dev, features);
1819 }
1820
1821 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1822                                     struct net_device *sb_dev)
1823 {
1824         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
1825                                      sb_dev);
1826 }
1827
1828 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1829                                     struct net_device *sb_dev)
1830 {
1831         struct qeth_card *card = dev->ml_priv;
1832
1833         if (qeth_uses_tx_prio_queueing(card))
1834                 return qeth_get_priority_queue(card, skb);
1835
1836         return netdev_pick_tx(dev, skb, sb_dev);
1837 }
1838
1839 static const struct net_device_ops qeth_l3_netdev_ops = {
1840         .ndo_open               = qeth_open,
1841         .ndo_stop               = qeth_stop,
1842         .ndo_get_stats64        = qeth_get_stats64,
1843         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1844         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1845         .ndo_validate_addr      = eth_validate_addr,
1846         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1847         .ndo_do_ioctl           = qeth_do_ioctl,
1848         .ndo_fix_features       = qeth_fix_features,
1849         .ndo_set_features       = qeth_set_features,
1850         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1851         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1852         .ndo_tx_timeout         = qeth_tx_timeout,
1853 };
1854
1855 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1856         .ndo_open               = qeth_open,
1857         .ndo_stop               = qeth_stop,
1858         .ndo_get_stats64        = qeth_get_stats64,
1859         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1860         .ndo_features_check     = qeth_l3_osa_features_check,
1861         .ndo_select_queue       = qeth_l3_osa_select_queue,
1862         .ndo_validate_addr      = eth_validate_addr,
1863         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1864         .ndo_do_ioctl           = qeth_do_ioctl,
1865         .ndo_fix_features       = qeth_fix_features,
1866         .ndo_set_features       = qeth_set_features,
1867         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
1868         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
1869         .ndo_tx_timeout         = qeth_tx_timeout,
1870         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1871 };
1872
1873 static int qeth_l3_setup_netdev(struct qeth_card *card)
1874 {
1875         struct net_device *dev = card->dev;
1876         unsigned int headroom;
1877         int rc;
1878
1879         if (IS_OSD(card) || IS_OSX(card)) {
1880                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1881
1882                 /*IPv6 address autoconfiguration stuff*/
1883                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1884
1885                 if (!IS_VM_NIC(card)) {
1886                         card->dev->features |= NETIF_F_SG;
1887                         card->dev->hw_features |= NETIF_F_TSO |
1888                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1889                         card->dev->vlan_features |= NETIF_F_TSO |
1890                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1891                 }
1892
1893                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1894                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1895                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1896                 }
1897                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1898                         card->dev->hw_features |= NETIF_F_TSO6;
1899                         card->dev->vlan_features |= NETIF_F_TSO6;
1900                 }
1901
1902                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1903                 if (card->dev->hw_features & NETIF_F_TSO6)
1904                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1905                 else if (card->dev->hw_features & NETIF_F_TSO)
1906                         headroom = sizeof(struct qeth_hdr_tso);
1907                 else
1908                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1909         } else if (IS_IQD(card)) {
1910                 card->dev->flags |= IFF_NOARP;
1911                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1912                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1913
1914                 rc = qeth_l3_iqd_read_initial_mac(card);
1915                 if (rc)
1916                         return rc;
1917         } else
1918                 return -ENODEV;
1919
1920         card->dev->needed_headroom = headroom;
1921         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1922                                 NETIF_F_HW_VLAN_CTAG_RX |
1923                                 NETIF_F_HW_VLAN_CTAG_FILTER;
1924
1925         netif_keep_dst(card->dev);
1926         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1927                 netif_set_gso_max_size(card->dev,
1928                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1929
1930         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1931         return register_netdev(card->dev);
1932 }
1933
1934 static const struct device_type qeth_l3_devtype = {
1935         .name = "qeth_layer3",
1936         .groups = qeth_l3_attr_groups,
1937 };
1938
1939 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1940 {
1941         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1942         int rc;
1943
1944         hash_init(card->ip_htable);
1945         mutex_init(&card->ip_lock);
1946         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1947                                                dev_name(&gdev->dev));
1948         if (!card->cmd_wq)
1949                 return -ENOMEM;
1950
1951         if (gdev->dev.type == &qeth_generic_devtype) {
1952                 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1953                 if (rc) {
1954                         destroy_workqueue(card->cmd_wq);
1955                         return rc;
1956                 }
1957         }
1958
1959         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1960         return 0;
1961 }
1962
1963 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1964 {
1965         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1966
1967         if (cgdev->dev.type == &qeth_generic_devtype)
1968                 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1969
1970         qeth_set_allowed_threads(card, 0, 1);
1971         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1972
1973         if (cgdev->state == CCWGROUP_ONLINE)
1974                 qeth_set_offline(card, false);
1975
1976         cancel_work_sync(&card->close_dev_work);
1977         if (card->dev->reg_state == NETREG_REGISTERED)
1978                 unregister_netdev(card->dev);
1979
1980         flush_workqueue(card->cmd_wq);
1981         destroy_workqueue(card->cmd_wq);
1982         qeth_l3_clear_ip_htable(card, 0);
1983         qeth_l3_clear_ipato_list(card);
1984 }
1985
1986 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1987 {
1988         struct net_device *dev = card->dev;
1989         int rc = 0;
1990
1991         /* softsetup */
1992         QETH_CARD_TEXT(card, 2, "softsetp");
1993
1994         rc = qeth_l3_setadapter_parms(card);
1995         if (rc)
1996                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1997         if (!card->options.sniffer) {
1998                 qeth_l3_start_ipassists(card);
1999
2000                 rc = qeth_l3_setrouting_v4(card);
2001                 if (rc)
2002                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2003                 rc = qeth_l3_setrouting_v6(card);
2004                 if (rc)
2005                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2006         }
2007
2008         card->state = CARD_STATE_SOFTSETUP;
2009
2010         qeth_set_allowed_threads(card, 0xffffffff, 0);
2011         qeth_l3_recover_ip(card);
2012
2013         if (dev->reg_state != NETREG_REGISTERED) {
2014                 rc = qeth_l3_setup_netdev(card);
2015                 if (rc)
2016                         goto err_setup;
2017
2018                 if (carrier_ok)
2019                         netif_carrier_on(dev);
2020         } else {
2021                 rtnl_lock();
2022                 rc = qeth_set_real_num_tx_queues(card,
2023                                                  qeth_tx_actual_queues(card));
2024                 if (rc) {
2025                         rtnl_unlock();
2026                         goto err_set_queues;
2027                 }
2028
2029                 if (carrier_ok)
2030                         netif_carrier_on(dev);
2031                 else
2032                         netif_carrier_off(dev);
2033
2034                 netif_device_attach(dev);
2035                 qeth_enable_hw_features(dev);
2036
2037                 if (card->info.open_when_online) {
2038                         card->info.open_when_online = 0;
2039                         dev_open(dev, NULL);
2040                 }
2041                 rtnl_unlock();
2042         }
2043         return 0;
2044
2045 err_set_queues:
2046 err_setup:
2047         qeth_set_allowed_threads(card, 0, 1);
2048         card->state = CARD_STATE_DOWN;
2049         qeth_l3_clear_ip_htable(card, 1);
2050         return rc;
2051 }
2052
2053 static void qeth_l3_set_offline(struct qeth_card *card)
2054 {
2055         qeth_set_allowed_threads(card, 0, 1);
2056         qeth_l3_drain_rx_mode_cache(card);
2057
2058         if (card->options.sniffer &&
2059             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2060                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2061
2062         if (card->state == CARD_STATE_SOFTSETUP) {
2063                 card->state = CARD_STATE_DOWN;
2064                 qeth_l3_clear_ip_htable(card, 1);
2065         }
2066 }
2067
2068 /* Returns zero if the command is successfully "consumed" */
2069 static int qeth_l3_control_event(struct qeth_card *card,
2070                                         struct qeth_ipa_cmd *cmd)
2071 {
2072         return 1;
2073 }
2074
2075 const struct qeth_discipline qeth_l3_discipline = {
2076         .devtype = &qeth_l3_devtype,
2077         .setup = qeth_l3_probe_device,
2078         .remove = qeth_l3_remove_device,
2079         .set_online = qeth_l3_set_online,
2080         .set_offline = qeth_l3_set_offline,
2081         .do_ioctl = qeth_l3_do_ioctl,
2082         .control_event_handler = qeth_l3_control_event,
2083 };
2084 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2085
2086 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2087                                    struct qeth_ipaddr *addr,
2088                                    unsigned long event)
2089 {
2090         switch (event) {
2091         case NETDEV_UP:
2092                 qeth_l3_modify_ip(card, addr, true);
2093                 return NOTIFY_OK;
2094         case NETDEV_DOWN:
2095                 qeth_l3_modify_ip(card, addr, false);
2096                 return NOTIFY_OK;
2097         default:
2098                 return NOTIFY_DONE;
2099         }
2100 }
2101
2102 struct qeth_l3_ip_event_work {
2103         struct work_struct work;
2104         struct qeth_card *card;
2105         struct qeth_ipaddr addr;
2106 };
2107
2108 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2109
2110 static void qeth_l3_add_ip_worker(struct work_struct *work)
2111 {
2112         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2113
2114         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2115         kfree(work);
2116 }
2117
2118 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2119 {
2120         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2121
2122         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2123         kfree(work);
2124 }
2125
2126 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2127 {
2128         if (is_vlan_dev(dev))
2129                 dev = vlan_dev_real_dev(dev);
2130         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2131             dev->netdev_ops == &qeth_l3_netdev_ops)
2132                 return (struct qeth_card *) dev->ml_priv;
2133         return NULL;
2134 }
2135
2136 static int qeth_l3_ip_event(struct notifier_block *this,
2137                             unsigned long event, void *ptr)
2138 {
2139         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2140         struct net_device *dev = ifa->ifa_dev->dev;
2141         struct qeth_ipaddr addr;
2142         struct qeth_card *card;
2143
2144         card = qeth_l3_get_card_from_dev(dev);
2145         if (!card)
2146                 return NOTIFY_DONE;
2147         QETH_CARD_TEXT(card, 3, "ipevent");
2148
2149         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2150         addr.u.a4.addr = ifa->ifa_address;
2151         addr.u.a4.mask = ifa->ifa_mask;
2152
2153         return qeth_l3_handle_ip_event(card, &addr, event);
2154 }
2155
2156 static struct notifier_block qeth_l3_ip_notifier = {
2157         qeth_l3_ip_event,
2158         NULL,
2159 };
2160
2161 static int qeth_l3_ip6_event(struct notifier_block *this,
2162                              unsigned long event, void *ptr)
2163 {
2164         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2165         struct net_device *dev = ifa->idev->dev;
2166         struct qeth_l3_ip_event_work *ip_work;
2167         struct qeth_card *card;
2168
2169         if (event != NETDEV_UP && event != NETDEV_DOWN)
2170                 return NOTIFY_DONE;
2171
2172         card = qeth_l3_get_card_from_dev(dev);
2173         if (!card)
2174                 return NOTIFY_DONE;
2175         QETH_CARD_TEXT(card, 3, "ip6event");
2176         if (!qeth_is_supported(card, IPA_IPV6))
2177                 return NOTIFY_DONE;
2178
2179         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2180         if (!ip_work)
2181                 return NOTIFY_DONE;
2182
2183         if (event == NETDEV_UP)
2184                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2185         else
2186                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2187
2188         ip_work->card = card;
2189         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2190                             QETH_PROT_IPV6);
2191         ip_work->addr.u.a6.addr = ifa->addr;
2192         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2193
2194         queue_work(card->cmd_wq, &ip_work->work);
2195         return NOTIFY_OK;
2196 }
2197
2198 static struct notifier_block qeth_l3_ip6_notifier = {
2199         qeth_l3_ip6_event,
2200         NULL,
2201 };
2202
2203 static int qeth_l3_register_notifiers(void)
2204 {
2205         int rc;
2206
2207         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2208         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2209         if (rc)
2210                 return rc;
2211         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2212         if (rc) {
2213                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2214                 return rc;
2215         }
2216         return 0;
2217 }
2218
2219 static void qeth_l3_unregister_notifiers(void)
2220 {
2221         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2222         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2223         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2224 }
2225
2226 static int __init qeth_l3_init(void)
2227 {
2228         pr_info("register layer 3 discipline\n");
2229         return qeth_l3_register_notifiers();
2230 }
2231
2232 static void __exit qeth_l3_exit(void)
2233 {
2234         qeth_l3_unregister_notifiers();
2235         pr_info("unregister layer 3 discipline\n");
2236 }
2237
2238 module_init(qeth_l3_init);
2239 module_exit(qeth_l3_exit);
2240 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2241 MODULE_DESCRIPTION("qeth layer 3 discipline");
2242 MODULE_LICENSE("GPL");