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 <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/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/inet.h>
  23 #include <linux/ipv6.h>
  24 #include <linux/inetdevice.h>
  25 #include <linux/igmp.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_ether.h>
  28 #include <linux/if_vlan.h>
  29 #include <linux/skbuff.h>
  30
  31 #include <net/ip.h>
  32 #include <net/arp.h>
  33 #include <net/route.h>
  34 #include <net/ipv6.h>
  35 #include <net/ip6_route.h>
  36 #include <net/iucv/af_iucv.h>
  37 #include <linux/hashtable.h>
  38
  39 #include "qeth_l3.h"
  40
  41 static int qeth_l3_register_addr_entry(struct qeth_card *,
  42                 struct qeth_ipaddr *);
  43 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  44                 struct qeth_ipaddr *);
  45
  46 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
  47                              char *buf)
  48 {
  49         if (proto == QETH_PROT_IPV4)
  50                 return scnprintf(buf, INET_ADDRSTRLEN, "%pI4", addr);
  51         else
  52                 return scnprintf(buf, INET6_ADDRSTRLEN, "%pI6", addr);
  53 }
  54
  55 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  56                                                    struct qeth_ipaddr *query)
  57 {
  58         u32 key = qeth_l3_ipaddr_hash(query);
  59         struct qeth_ipaddr *addr;
  60
  61         if (query->is_multicast) {
  62                 hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
  63                         if (qeth_l3_addr_match_ip(addr, query))
  64                                 return addr;
  65         } else {
  66                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  67                         if (qeth_l3_addr_match_ip(addr, query))
  68                                 return addr;
  69         }
  70         return NULL;
  71 }
  72
  73 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  74 {
  75         int i, j;
  76         u8 octet;
  77
  78         for (i = 0; i < len; ++i) {
  79                 octet = addr[i];
  80                 for (j = 7; j >= 0; --j) {
  81                         bits[i*8 + j] = octet & 1;
  82                         octet >>= 1;
  83                 }
  84         }
  85 }
  86
  87 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
  88                                              struct qeth_ipaddr *addr)
  89 {
  90         struct qeth_ipato_entry *ipatoe;
  91         u8 addr_bits[128] = {0, };
  92         u8 ipatoe_bits[128] = {0, };
  93         int rc = 0;
  94
  95         if (!card->ipato.enabled)
  96                 return false;
  97         if (addr->type != QETH_IP_TYPE_NORMAL)
  98                 return false;
  99
 100         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 101                                      (addr->proto == QETH_PROT_IPV4) ? 4 : 16);
 102         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 103                 if (addr->proto != ipatoe->proto)
 104                         continue;
 105                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 106                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 107                                           4 : 16);
 108                 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
 109                 if (rc)
 110                         break;
 111         }
 112         /* invert? */
 113         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 114                 rc = !rc;
 115         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 116                 rc = !rc;
 117
 118         return rc;
 119 }
 120
 121 static int qeth_l3_delete_ip(struct qeth_card *card,
 122                              struct qeth_ipaddr *tmp_addr)
 123 {
 124         int rc = 0;
 125         struct qeth_ipaddr *addr;
 126
 127         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 128                 QETH_CARD_TEXT(card, 2, "delrxip");
 129         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 130                 QETH_CARD_TEXT(card, 2, "delvipa");
 131         else
 132                 QETH_CARD_TEXT(card, 2, "delip");
 133
 134         if (tmp_addr->proto == QETH_PROT_IPV4)
 135                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 136         else {
 137                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 138                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 139         }
 140
 141         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 142         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 143                 return -ENOENT;
 144
 145         addr->ref_counter--;
 146         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 147                 return rc;
 148
 149         if (qeth_card_hw_is_reachable(card))
 150                 rc = qeth_l3_deregister_addr_entry(card, addr);
 151
 152         hash_del(&addr->hnode);
 153         kfree(addr);
 154
 155         return rc;
 156 }
 157
 158 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 159 {
 160         int rc = 0;
 161         struct qeth_ipaddr *addr;
 162         char buf[INET6_ADDRSTRLEN];
 163
 164         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 165                 QETH_CARD_TEXT(card, 2, "addrxip");
 166         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 167                 QETH_CARD_TEXT(card, 2, "addvipa");
 168         else
 169                 QETH_CARD_TEXT(card, 2, "addip");
 170
 171         if (tmp_addr->proto == QETH_PROT_IPV4)
 172                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 173         else {
 174                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 175                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 176         }
 177
 178         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 179         if (addr) {
 180                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 181                         return -EADDRINUSE;
 182                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 183                         addr->ref_counter++;
 184                         return 0;
 185                 }
 186                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 187                                          buf);
 188                 dev_warn(&card->gdev->dev,
 189                          "Registering IP address %s failed\n", buf);
 190                 return -EADDRINUSE;
 191         } else {
 192                 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 193                 if (!addr)
 194                         return -ENOMEM;
 195
 196                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 197                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 198                         addr->ipato = 1;
 199                 }
 200                 hash_add(card->ip_htable, &addr->hnode,
 201                                 qeth_l3_ipaddr_hash(addr));
 202
 203                 if (!qeth_card_hw_is_reachable(card)) {
 204                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 205                         return 0;
 206                 }
 207
 208                 rc = qeth_l3_register_addr_entry(card, addr);
 209
 210                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 211                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 212                 } else {
 213                         hash_del(&addr->hnode);
 214                         kfree(addr);
 215                 }
 216         }
 217         return rc;
 218 }
 219
 220 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 221                              bool add)
 222 {
 223         int rc;
 224
 225         mutex_lock(&card->ip_lock);
 226         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 227         mutex_unlock(&card->ip_lock);
 228
 229         return rc;
 230 }
 231
 232 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 233 {
 234         struct qeth_ipaddr *addr;
 235         struct hlist_node *tmp;
 236         int i;
 237
 238         hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 239                 hash_del(&addr->hnode);
 240                 kfree(addr);
 241         }
 242 }
 243
 244 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 245 {
 246         struct qeth_ipaddr *addr;
 247         struct hlist_node *tmp;
 248         int i;
 249
 250         QETH_CARD_TEXT(card, 4, "clearip");
 251
 252         mutex_lock(&card->ip_lock);
 253
 254         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 255                 if (!recover) {
 256                         hash_del(&addr->hnode);
 257                         kfree(addr);
 258                         continue;
 259                 }
 260                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 261         }
 262
 263         mutex_unlock(&card->ip_lock);
 264 }
 265
 266 static void qeth_l3_recover_ip(struct qeth_card *card)
 267 {
 268         struct qeth_ipaddr *addr;
 269         struct hlist_node *tmp;
 270         int i;
 271         int rc;
 272
 273         QETH_CARD_TEXT(card, 4, "recovrip");
 274
 275         mutex_lock(&card->ip_lock);
 276
 277         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 278                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 279                         rc = qeth_l3_register_addr_entry(card, addr);
 280
 281                         if (!rc) {
 282                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 283                         } else {
 284                                 hash_del(&addr->hnode);
 285                                 kfree(addr);
 286                         }
 287                 }
 288         }
 289
 290         mutex_unlock(&card->ip_lock);
 291 }
 292
 293 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 294                                unsigned long data)
 295 {
 296         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 297
 298         switch (cmd->hdr.return_code) {
 299         case IPA_RC_SUCCESS:
 300                 return 0;
 301         case IPA_RC_DUPLICATE_IP_ADDRESS:
 302                 return -EADDRINUSE;
 303         case IPA_RC_MC_ADDR_NOT_FOUND:
 304                 return -ENOENT;
 305         case IPA_RC_LAN_OFFLINE:
 306                 return -ENETDOWN;
 307         default:
 308                 return -EIO;
 309         }
 310 }
 311
 312 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 313                                  struct qeth_ipaddr *addr,
 314                                  enum qeth_ipa_cmds ipacmd)
 315 {
 316         struct qeth_cmd_buffer *iob;
 317         struct qeth_ipa_cmd *cmd;
 318
 319         QETH_CARD_TEXT(card, 4, "setdelmc");
 320
 321         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 322                                  IPA_DATA_SIZEOF(setdelipm));
 323         if (!iob)
 324                 return -ENOMEM;
 325         cmd = __ipa_cmd(iob);
 326         if (addr->proto == QETH_PROT_IPV6) {
 327                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 328                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 329         } else {
 330                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 331                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 332         }
 333
 334         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 335 }
 336
 337 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 338 {
 339         unsigned int i = 0;
 340
 341         while (len && i < 4) {
 342                 int mask_len = min_t(int, len, 32);
 343
 344                 prefix->s6_addr32[i] = inet_make_mask(mask_len);
 345                 len -= mask_len;
 346                 i++;
 347         }
 348 }
 349
 350 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 351 {
 352         switch (addr->type) {
 353         case QETH_IP_TYPE_RXIP:
 354                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 355         case QETH_IP_TYPE_VIPA:
 356                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 357                                QETH_IPA_DELIP_VIPA_FLAG;
 358         default:
 359                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 360         }
 361 }
 362
 363 static int qeth_l3_send_setdelip(struct qeth_card *card,
 364                                  struct qeth_ipaddr *addr,
 365                                  enum qeth_ipa_cmds ipacmd)
 366 {
 367         struct qeth_cmd_buffer *iob;
 368         struct qeth_ipa_cmd *cmd;
 369         u32 flags;
 370
 371         QETH_CARD_TEXT(card, 4, "setdelip");
 372
 373         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 374                                  IPA_DATA_SIZEOF(setdelip6));
 375         if (!iob)
 376                 return -ENOMEM;
 377         cmd = __ipa_cmd(iob);
 378
 379         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 380         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 381
 382         if (addr->proto == QETH_PROT_IPV6) {
 383                 cmd->data.setdelip6.addr = addr->u.a6.addr;
 384                 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 385                                         addr->u.a6.pfxlen);
 386                 cmd->data.setdelip6.flags = flags;
 387         } else {
 388                 cmd->data.setdelip4.addr = addr->u.a4.addr;
 389                 cmd->data.setdelip4.mask = addr->u.a4.mask;
 390                 cmd->data.setdelip4.flags = flags;
 391         }
 392
 393         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 394 }
 395
 396 static int qeth_l3_send_setrouting(struct qeth_card *card,
 397         enum qeth_routing_types type, enum qeth_prot_versions prot)
 398 {
 399         int rc;
 400         struct qeth_ipa_cmd *cmd;
 401         struct qeth_cmd_buffer *iob;
 402
 403         QETH_CARD_TEXT(card, 4, "setroutg");
 404         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 405                                  IPA_DATA_SIZEOF(setrtg));
 406         if (!iob)
 407                 return -ENOMEM;
 408         cmd = __ipa_cmd(iob);
 409         cmd->data.setrtg.type = (type);
 410         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 411
 412         return rc;
 413 }
 414
 415 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 416                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 417 {
 418         if (IS_IQD(card)) {
 419                 switch (*type) {
 420                 case NO_ROUTER:
 421                 case PRIMARY_CONNECTOR:
 422                 case SECONDARY_CONNECTOR:
 423                 case MULTICAST_ROUTER:
 424                         return 0;
 425                 default:
 426                         goto out_inval;
 427                 }
 428         } else {
 429                 switch (*type) {
 430                 case NO_ROUTER:
 431                 case PRIMARY_ROUTER:
 432                 case SECONDARY_ROUTER:
 433                         return 0;
 434                 case MULTICAST_ROUTER:
 435                         if (qeth_is_ipafunc_supported(card, prot,
 436                                                       IPA_OSA_MC_ROUTER))
 437                                 return 0;
 438                         goto out_inval;
 439                 default:
 440                         goto out_inval;
 441                 }
 442         }
 443 out_inval:
 444         *type = NO_ROUTER;
 445         return -EINVAL;
 446 }
 447
 448 int qeth_l3_setrouting_v4(struct qeth_card *card)
 449 {
 450         int rc;
 451
 452         QETH_CARD_TEXT(card, 3, "setrtg4");
 453
 454         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 455                                   QETH_PROT_IPV4);
 456         if (rc)
 457                 return rc;
 458
 459         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 460                                   QETH_PROT_IPV4);
 461         if (rc) {
 462                 card->options.route4.type = NO_ROUTER;
 463                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 464                                  rc, CARD_DEVID(card));
 465         }
 466         return rc;
 467 }
 468
 469 int qeth_l3_setrouting_v6(struct qeth_card *card)
 470 {
 471         int rc = 0;
 472
 473         QETH_CARD_TEXT(card, 3, "setrtg6");
 474
 475         if (!qeth_is_supported(card, IPA_IPV6))
 476                 return 0;
 477         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 478                                   QETH_PROT_IPV6);
 479         if (rc)
 480                 return rc;
 481
 482         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 483                                   QETH_PROT_IPV6);
 484         if (rc) {
 485                 card->options.route6.type = NO_ROUTER;
 486                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 487                                  rc, CARD_DEVID(card));
 488         }
 489         return rc;
 490 }
 491
 492 /*
 493  * IP address takeover related functions
 494  */
 495
 496 /*
 497  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 498  *
 499  * Caller must hold ip_lock.
 500  */
 501 void qeth_l3_update_ipato(struct qeth_card *card)
 502 {
 503         struct qeth_ipaddr *addr;
 504         unsigned int i;
 505
 506         hash_for_each(card->ip_htable, i, addr, hnode) {
 507                 if (addr->type != QETH_IP_TYPE_NORMAL)
 508                         continue;
 509                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 510         }
 511 }
 512
 513 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 514 {
 515         struct qeth_ipato_entry *ipatoe, *tmp;
 516
 517         mutex_lock(&card->ip_lock);
 518
 519         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 520                 list_del(&ipatoe->entry);
 521                 kfree(ipatoe);
 522         }
 523
 524         qeth_l3_update_ipato(card);
 525         mutex_unlock(&card->ip_lock);
 526 }
 527
 528 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 529                                 struct qeth_ipato_entry *new)
 530 {
 531         struct qeth_ipato_entry *ipatoe;
 532         int rc = 0;
 533
 534         QETH_CARD_TEXT(card, 2, "addipato");
 535
 536         mutex_lock(&card->ip_lock);
 537
 538         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 539                 if (ipatoe->proto != new->proto)
 540                         continue;
 541                 if (!memcmp(ipatoe->addr, new->addr,
 542                             (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
 543                     (ipatoe->mask_bits == new->mask_bits)) {
 544                         rc = -EEXIST;
 545                         break;
 546                 }
 547         }
 548
 549         if (!rc) {
 550                 list_add_tail(&new->entry, &card->ipato.entries);
 551                 qeth_l3_update_ipato(card);
 552         }
 553
 554         mutex_unlock(&card->ip_lock);
 555
 556         return rc;
 557 }
 558
 559 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 560                             enum qeth_prot_versions proto, u8 *addr,
 561                             unsigned int mask_bits)
 562 {
 563         struct qeth_ipato_entry *ipatoe, *tmp;
 564         int rc = -ENOENT;
 565
 566         QETH_CARD_TEXT(card, 2, "delipato");
 567
 568         mutex_lock(&card->ip_lock);
 569
 570         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 571                 if (ipatoe->proto != proto)
 572                         continue;
 573                 if (!memcmp(ipatoe->addr, addr,
 574                             (proto == QETH_PROT_IPV4) ? 4 : 16) &&
 575                     (ipatoe->mask_bits == mask_bits)) {
 576                         list_del(&ipatoe->entry);
 577                         qeth_l3_update_ipato(card);
 578                         kfree(ipatoe);
 579                         rc = 0;
 580                 }
 581         }
 582
 583         mutex_unlock(&card->ip_lock);
 584
 585         return rc;
 586 }
 587
 588 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 589                              enum qeth_ip_types type,
 590                              enum qeth_prot_versions proto)
 591 {
 592         struct qeth_ipaddr addr;
 593
 594         qeth_l3_init_ipaddr(&addr, type, proto);
 595         if (proto == QETH_PROT_IPV4)
 596                 memcpy(&addr.u.a4.addr, ip, 4);
 597         else
 598                 memcpy(&addr.u.a6.addr, ip, 16);
 599
 600         return qeth_l3_modify_ip(card, &addr, add);
 601 }
 602
 603 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 604 {
 605         struct qeth_ipaddr addr;
 606         unsigned int i;
 607
 608         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 609         addr.u.a6.addr.s6_addr[0] = 0xfe;
 610         addr.u.a6.addr.s6_addr[1] = 0x80;
 611         for (i = 0; i < 8; i++)
 612                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 613
 614         return qeth_l3_modify_ip(card, &addr, add);
 615 }
 616
 617 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 618                                 struct qeth_ipaddr *addr)
 619 {
 620         char buf[50];
 621         int rc = 0;
 622         int cnt = 3;
 623
 624         if (card->options.sniffer)
 625                 return 0;
 626
 627         if (addr->proto == QETH_PROT_IPV4) {
 628                 QETH_CARD_TEXT(card, 2, "setaddr4");
 629                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 630         } else if (addr->proto == QETH_PROT_IPV6) {
 631                 QETH_CARD_TEXT(card, 2, "setaddr6");
 632                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 633                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 634         } else {
 635                 QETH_CARD_TEXT(card, 2, "setaddr?");
 636                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 637         }
 638         do {
 639                 if (addr->is_multicast)
 640                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 641                 else
 642                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 643                 if (rc)
 644                         QETH_CARD_TEXT(card, 2, "failed");
 645         } while ((--cnt > 0) && rc);
 646         if (rc) {
 647                 QETH_CARD_TEXT(card, 2, "FAILED");
 648                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 649                 dev_warn(&card->gdev->dev,
 650                         "Registering IP address %s failed\n", buf);
 651         }
 652         return rc;
 653 }
 654
 655 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 656                                                 struct qeth_ipaddr *addr)
 657 {
 658         int rc = 0;
 659
 660         if (card->options.sniffer)
 661                 return 0;
 662
 663         if (addr->proto == QETH_PROT_IPV4) {
 664                 QETH_CARD_TEXT(card, 2, "deladdr4");
 665                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 666         } else if (addr->proto == QETH_PROT_IPV6) {
 667                 QETH_CARD_TEXT(card, 2, "deladdr6");
 668                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 669                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 670         } else {
 671                 QETH_CARD_TEXT(card, 2, "deladdr?");
 672                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 673         }
 674         if (addr->is_multicast)
 675                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 676         else
 677                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 678         if (rc)
 679                 QETH_CARD_TEXT(card, 2, "failed");
 680
 681         return rc;
 682 }
 683
 684 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 685 {
 686         int rc = 0;
 687
 688         QETH_CARD_TEXT(card, 2, "setadprm");
 689
 690         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 691                 rc = qeth_setadpparms_change_macaddr(card);
 692                 if (rc)
 693                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 694                                 " address failed\n");
 695         }
 696
 697         return rc;
 698 }
 699
 700 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 701 {
 702         int rc;
 703
 704         QETH_CARD_TEXT(card, 3, "ipaarp");
 705
 706         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 707                 dev_info(&card->gdev->dev,
 708                          "ARP processing not supported on %s!\n",
 709                          netdev_name(card->dev));
 710                 return 0;
 711         }
 712         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 713                                           IPA_CMD_ASS_START, NULL);
 714         if (rc) {
 715                 dev_warn(&card->gdev->dev,
 716                          "Starting ARP processing support for %s failed\n",
 717                          netdev_name(card->dev));
 718         }
 719         return rc;
 720 }
 721
 722 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 723 {
 724         int rc;
 725
 726         QETH_CARD_TEXT(card, 3, "stsrcmac");
 727
 728         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 729                 dev_info(&card->gdev->dev,
 730                          "Inbound source MAC-address not supported on %s\n",
 731                          netdev_name(card->dev));
 732                 return -EOPNOTSUPP;
 733         }
 734
 735         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 736                                           IPA_CMD_ASS_START, NULL);
 737         if (rc)
 738                 dev_warn(&card->gdev->dev,
 739                          "Starting source MAC-address support for %s failed\n",
 740                          netdev_name(card->dev));
 741         return rc;
 742 }
 743
 744 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 745 {
 746         int rc = 0;
 747
 748         QETH_CARD_TEXT(card, 3, "strtvlan");
 749
 750         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 751                 dev_info(&card->gdev->dev,
 752                          "VLAN not supported on %s\n", netdev_name(card->dev));
 753                 return -EOPNOTSUPP;
 754         }
 755
 756         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 757                                           IPA_CMD_ASS_START, NULL);
 758         if (rc) {
 759                 dev_warn(&card->gdev->dev,
 760                          "Starting VLAN support for %s failed\n",
 761                          netdev_name(card->dev));
 762         } else {
 763                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 764         }
 765         return rc;
 766 }
 767
 768 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 769 {
 770         int rc;
 771
 772         QETH_CARD_TEXT(card, 3, "stmcast");
 773
 774         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 775                 dev_info(&card->gdev->dev,
 776                          "Multicast not supported on %s\n",
 777                          netdev_name(card->dev));
 778                 return -EOPNOTSUPP;
 779         }
 780
 781         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 782                                           IPA_CMD_ASS_START, NULL);
 783         if (rc) {
 784                 dev_warn(&card->gdev->dev,
 785                          "Starting multicast support for %s failed\n",
 786                          netdev_name(card->dev));
 787         } else {
 788                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 789                 card->dev->flags |= IFF_MULTICAST;
 790         }
 791         return rc;
 792 }
 793
 794 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 795 {
 796         u32 ipv6_data = 3;
 797         int rc;
 798
 799         QETH_CARD_TEXT(card, 3, "softipv6");
 800
 801         if (IS_IQD(card))
 802                 goto out;
 803
 804         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 805                                           &ipv6_data);
 806         if (rc) {
 807                 dev_err(&card->gdev->dev,
 808                         "Activating IPv6 support for %s failed\n",
 809                         netdev_name(card->dev));
 810                 return rc;
 811         }
 812         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 813                                              NULL);
 814         if (rc) {
 815                 dev_err(&card->gdev->dev,
 816                         "Activating IPv6 support for %s failed\n",
 817                          netdev_name(card->dev));
 818                 return rc;
 819         }
 820         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 821                                              IPA_CMD_ASS_START, NULL);
 822         if (rc) {
 823                 dev_warn(&card->gdev->dev,
 824                          "Enabling the passthrough mode for %s failed\n",
 825                          netdev_name(card->dev));
 826                 return rc;
 827         }
 828 out:
 829         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 830         return 0;
 831 }
 832
 833 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 834 {
 835         QETH_CARD_TEXT(card, 3, "strtipv6");
 836
 837         if (!qeth_is_supported(card, IPA_IPV6)) {
 838                 dev_info(&card->gdev->dev,
 839                          "IPv6 not supported on %s\n", netdev_name(card->dev));
 840                 return 0;
 841         }
 842         return qeth_l3_softsetup_ipv6(card);
 843 }
 844
 845 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 846 {
 847         u32 filter_data = 1;
 848         int rc;
 849
 850         QETH_CARD_TEXT(card, 3, "stbrdcst");
 851         card->info.broadcast_capable = 0;
 852         if (!qeth_is_supported(card, IPA_FILTERING)) {
 853                 dev_info(&card->gdev->dev,
 854                          "Broadcast not supported on %s\n",
 855                          netdev_name(card->dev));
 856                 rc = -EOPNOTSUPP;
 857                 goto out;
 858         }
 859         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 860                                           IPA_CMD_ASS_START, NULL);
 861         if (rc) {
 862                 dev_warn(&card->gdev->dev,
 863                          "Enabling broadcast filtering for %s failed\n",
 864                          netdev_name(card->dev));
 865                 goto out;
 866         }
 867
 868         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 869                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 870         if (rc) {
 871                 dev_warn(&card->gdev->dev,
 872                          "Setting up broadcast filtering for %s failed\n",
 873                          netdev_name(card->dev));
 874                 goto out;
 875         }
 876         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 877         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 878         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 879                                           IPA_CMD_ASS_ENABLE, &filter_data);
 880         if (rc) {
 881                 dev_warn(&card->gdev->dev,
 882                          "Setting up broadcast echo filtering for %s failed\n",
 883                          netdev_name(card->dev));
 884                 goto out;
 885         }
 886         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 887 out:
 888         if (card->info.broadcast_capable)
 889                 card->dev->flags |= IFF_BROADCAST;
 890         else
 891                 card->dev->flags &= ~IFF_BROADCAST;
 892         return rc;
 893 }
 894
 895 static void qeth_l3_start_ipassists(struct qeth_card *card)
 896 {
 897         QETH_CARD_TEXT(card, 3, "strtipas");
 898
 899         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 900         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 901         qeth_l3_start_ipa_vlan(card);           /* go on*/
 902         qeth_l3_start_ipa_multicast(card);              /* go on*/
 903         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 904         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 905 }
 906
 907 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 908                 struct qeth_reply *reply, unsigned long data)
 909 {
 910         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 911
 912         if (cmd->hdr.return_code)
 913                 return -EIO;
 914         if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 915                 return -EADDRNOTAVAIL;
 916
 917         eth_hw_addr_set(card->dev, 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_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1516                                       void __user *data, int cmd)
1517 {
1518         struct qeth_card *card = dev->ml_priv;
1519         struct qeth_arp_cache_entry arp_entry;
1520         enum qeth_arp_process_subcmds arp_cmd;
1521         int rc = 0;
1522
1523         switch (cmd) {
1524         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1525                 if (!capable(CAP_NET_ADMIN)) {
1526                         rc = -EPERM;
1527                         break;
1528                 }
1529                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1530                 break;
1531         case SIOC_QETH_ARP_QUERY_INFO:
1532                 if (!capable(CAP_NET_ADMIN)) {
1533                         rc = -EPERM;
1534                         break;
1535                 }
1536                 rc = qeth_l3_arp_query(card, data);
1537                 break;
1538         case SIOC_QETH_ARP_ADD_ENTRY:
1539         case SIOC_QETH_ARP_REMOVE_ENTRY:
1540                 if (!capable(CAP_NET_ADMIN))
1541                         return -EPERM;
1542                 if (copy_from_user(&arp_entry, data, sizeof(arp_entry)))
1543                         return -EFAULT;
1544
1545                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1546                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1547                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1548                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1549         case SIOC_QETH_ARP_FLUSH_CACHE:
1550                 if (!capable(CAP_NET_ADMIN)) {
1551                         rc = -EPERM;
1552                         break;
1553                 }
1554                 rc = qeth_l3_arp_flush_cache(card);
1555                 break;
1556         default:
1557                 rc = qeth_siocdevprivate(dev, rq, data, cmd);
1558         }
1559         return rc;
1560 }
1561
1562 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1563                                      __be16 proto)
1564 {
1565         struct neighbour *n = NULL;
1566
1567         if (dst)
1568                 n = dst_neigh_lookup_skb(dst, skb);
1569
1570         if (n) {
1571                 int cast_type = n->type;
1572
1573                 neigh_release(n);
1574                 if ((cast_type == RTN_BROADCAST) ||
1575                     (cast_type == RTN_MULTICAST) ||
1576                     (cast_type == RTN_ANYCAST))
1577                         return cast_type;
1578                 return RTN_UNICAST;
1579         }
1580
1581         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1582         switch (proto) {
1583         case htons(ETH_P_IP):
1584                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1585                         return RTN_BROADCAST;
1586                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1587                                 RTN_MULTICAST : RTN_UNICAST;
1588         case htons(ETH_P_IPV6):
1589                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1590                                 RTN_MULTICAST : RTN_UNICAST;
1591         case htons(ETH_P_AF_IUCV):
1592                 return RTN_UNICAST;
1593         default:
1594                 /* OSA only: ... and MAC address */
1595                 return qeth_get_ether_cast_type(skb);
1596         }
1597 }
1598
1599 static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1600 {
1601         struct dst_entry *dst;
1602         int cast_type;
1603
1604         rcu_read_lock();
1605         dst = qeth_dst_check_rcu(skb, proto);
1606         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1607         rcu_read_unlock();
1608
1609         return cast_type;
1610 }
1611
1612 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1613 {
1614         if (cast_type == RTN_MULTICAST)
1615                 return QETH_CAST_MULTICAST;
1616         if (cast_type == RTN_ANYCAST)
1617                 return QETH_CAST_ANYCAST;
1618         if (cast_type == RTN_BROADCAST)
1619                 return QETH_CAST_BROADCAST;
1620         return QETH_CAST_UNICAST;
1621 }
1622
1623 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1624                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1625                                 __be16 proto, unsigned int data_len)
1626 {
1627         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1628         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1629         struct qeth_card *card = queue->card;
1630         struct dst_entry *dst;
1631         int cast_type;
1632
1633         hdr->hdr.l3.length = data_len;
1634
1635         if (skb_is_gso(skb)) {
1636                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1637         } else {
1638                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1639
1640                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1641                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto);
1642                         /* some HW requires combined L3+L4 csum offload: */
1643                         if (proto == htons(ETH_P_IP))
1644                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1645                 }
1646         }
1647
1648         if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1649                 /* NETIF_F_HW_VLAN_CTAG_TX */
1650                 if (skb_vlan_tag_present(skb)) {
1651                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1652                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1653                 }
1654         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1655                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1656                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1657         }
1658
1659         rcu_read_lock();
1660         dst = qeth_dst_check_rcu(skb, proto);
1661
1662         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1663                 cast_type = RTN_UNICAST;
1664         else
1665                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1666         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1667
1668         switch (proto) {
1669         case htons(ETH_P_IP):
1670                 l3_hdr->next_hop.addr.s6_addr32[3] =
1671                                         qeth_next_hop_v4_rcu(skb, dst);
1672                 break;
1673         case htons(ETH_P_IPV6):
1674                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1675
1676                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1677                 if (!IS_IQD(card))
1678                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1679                 break;
1680         case htons(ETH_P_AF_IUCV):
1681                 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1682                 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1683                        iucv_trans_hdr(skb)->destUserID, 8);
1684                 l3_hdr->flags |= QETH_HDR_IPV6;
1685                 break;
1686         default:
1687                 /* OSA only: */
1688                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1689         }
1690         rcu_read_unlock();
1691 }
1692
1693 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1694 {
1695         struct iphdr *iph = ip_hdr(skb);
1696
1697         /* this is safe, IPv6 traffic takes a different path */
1698         if (skb->ip_summed == CHECKSUM_PARTIAL)
1699                 iph->check = 0;
1700         if (skb_is_gso(skb)) {
1701                 iph->tot_len = 0;
1702                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1703                                                     iph->daddr, 0);
1704         }
1705 }
1706
1707 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1708                         struct qeth_qdio_out_q *queue, __be16 proto)
1709 {
1710         unsigned int hw_hdr_len;
1711         int rc;
1712
1713         /* re-use the L2 header area for the HW header: */
1714         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1715                                        sizeof(struct qeth_hdr);
1716         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1717         if (rc)
1718                 return rc;
1719         skb_pull(skb, ETH_HLEN);
1720
1721         qeth_l3_fixup_headers(skb);
1722         return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1723 }
1724
1725 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1726                                            struct net_device *dev)
1727 {
1728         struct qeth_card *card = dev->ml_priv;
1729         __be16 proto = vlan_get_protocol(skb);
1730         u16 txq = skb_get_queue_mapping(skb);
1731         struct qeth_qdio_out_q *queue;
1732         int rc;
1733
1734         if (!skb_is_gso(skb))
1735                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1736         if (IS_IQD(card)) {
1737                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1738
1739                 if (card->options.sniffer)
1740                         goto tx_drop;
1741
1742                 switch (proto) {
1743                 case htons(ETH_P_AF_IUCV):
1744                         if (card->options.cq != QETH_CQ_ENABLED)
1745                                 goto tx_drop;
1746                         break;
1747                 case htons(ETH_P_IP):
1748                 case htons(ETH_P_IPV6):
1749                         if (card->options.cq == QETH_CQ_ENABLED)
1750                                 goto tx_drop;
1751                         break;
1752                 default:
1753                         goto tx_drop;
1754                 }
1755         } else {
1756                 queue = card->qdio.out_qs[txq];
1757         }
1758
1759         if (!(dev->flags & IFF_BROADCAST) &&
1760             qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1761                 goto tx_drop;
1762
1763         if (proto == htons(ETH_P_IP) || IS_IQD(card))
1764                 rc = qeth_l3_xmit(card, skb, queue, proto);
1765         else
1766                 rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1767
1768         if (!rc)
1769                 return NETDEV_TX_OK;
1770
1771 tx_drop:
1772         QETH_TXQ_STAT_INC(queue, tx_dropped);
1773         kfree_skb(skb);
1774         return NETDEV_TX_OK;
1775 }
1776
1777 static void qeth_l3_set_rx_mode(struct net_device *dev)
1778 {
1779         struct qeth_card *card = dev->ml_priv;
1780
1781         schedule_work(&card->rx_mode_work);
1782 }
1783
1784 /*
1785  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1786  * NOARP on the netdevice is no option because it also turns off neighbor
1787  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1788  * arp resolution but we want the hard header (packet socket will work
1789  * e.g. tcpdump)
1790  */
1791 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1792 {
1793         n->nud_state = NUD_NOARP;
1794         memcpy(n->ha, "FAKELL", 6);
1795         n->output = n->ops->connected_output;
1796         return 0;
1797 }
1798
1799 static int
1800 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1801 {
1802         if (np->tbl->family == AF_INET)
1803                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1804
1805         return 0;
1806 }
1807
1808 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1809                                                     struct net_device *dev,
1810                                                     netdev_features_t features)
1811 {
1812         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1813                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1814         return qeth_features_check(skb, dev, features);
1815 }
1816
1817 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1818                                     struct net_device *sb_dev)
1819 {
1820         __be16 proto = vlan_get_protocol(skb);
1821
1822         return qeth_iqd_select_queue(dev, skb,
1823                                      qeth_l3_get_cast_type(skb, proto), sb_dev);
1824 }
1825
1826 static const struct net_device_ops qeth_l3_netdev_ops = {
1827         .ndo_open               = qeth_open,
1828         .ndo_stop               = qeth_stop,
1829         .ndo_get_stats64        = qeth_get_stats64,
1830         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1831         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1832         .ndo_validate_addr      = eth_validate_addr,
1833         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1834         .ndo_eth_ioctl          = qeth_do_ioctl,
1835         .ndo_siocdevprivate     = qeth_l3_ndo_siocdevprivate,
1836         .ndo_fix_features       = qeth_fix_features,
1837         .ndo_set_features       = qeth_set_features,
1838         .ndo_tx_timeout         = qeth_tx_timeout,
1839 };
1840
1841 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1842         .ndo_open               = qeth_open,
1843         .ndo_stop               = qeth_stop,
1844         .ndo_get_stats64        = qeth_get_stats64,
1845         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1846         .ndo_features_check     = qeth_l3_osa_features_check,
1847         .ndo_select_queue       = qeth_osa_select_queue,
1848         .ndo_validate_addr      = eth_validate_addr,
1849         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1850         .ndo_eth_ioctl          = qeth_do_ioctl,
1851         .ndo_siocdevprivate     = qeth_l3_ndo_siocdevprivate,
1852         .ndo_fix_features       = qeth_fix_features,
1853         .ndo_set_features       = qeth_set_features,
1854         .ndo_tx_timeout         = qeth_tx_timeout,
1855         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1856 };
1857
1858 static int qeth_l3_setup_netdev(struct qeth_card *card)
1859 {
1860         struct net_device *dev = card->dev;
1861         unsigned int headroom;
1862         int rc;
1863
1864         if (IS_OSD(card) || IS_OSX(card)) {
1865                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1866
1867                 /*IPv6 address autoconfiguration stuff*/
1868                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1869
1870                 if (!IS_VM_NIC(card)) {
1871                         card->dev->features |= NETIF_F_SG;
1872                         card->dev->hw_features |= NETIF_F_TSO |
1873                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1874                         card->dev->vlan_features |= NETIF_F_TSO |
1875                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1876                 }
1877
1878                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1879                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1880                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1881                 }
1882                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1883                         card->dev->hw_features |= NETIF_F_TSO6;
1884                         card->dev->vlan_features |= NETIF_F_TSO6;
1885                 }
1886
1887                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1888                 if (card->dev->hw_features & NETIF_F_TSO6)
1889                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1890                 else if (card->dev->hw_features & NETIF_F_TSO)
1891                         headroom = sizeof(struct qeth_hdr_tso);
1892                 else
1893                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1894         } else if (IS_IQD(card)) {
1895                 card->dev->flags |= IFF_NOARP;
1896                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1897                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1898
1899                 rc = qeth_l3_iqd_read_initial_mac(card);
1900                 if (rc)
1901                         return rc;
1902         } else
1903                 return -ENODEV;
1904
1905         card->dev->needed_headroom = headroom;
1906         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1907                                 NETIF_F_HW_VLAN_CTAG_RX;
1908
1909         netif_keep_dst(card->dev);
1910         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1911                 netif_set_tso_max_size(card->dev,
1912                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1913
1914         netif_napi_add(card->dev, &card->napi, qeth_poll);
1915         return register_netdev(card->dev);
1916 }
1917
1918 static const struct device_type qeth_l3_devtype = {
1919         .name = "qeth_layer3",
1920         .groups = qeth_l3_attr_groups,
1921 };
1922
1923 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1924 {
1925         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1926         int rc;
1927
1928         hash_init(card->ip_htable);
1929         mutex_init(&card->ip_lock);
1930         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1931                                                dev_name(&gdev->dev));
1932         if (!card->cmd_wq)
1933                 return -ENOMEM;
1934
1935         if (gdev->dev.type) {
1936                 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1937                 if (rc) {
1938                         destroy_workqueue(card->cmd_wq);
1939                         return rc;
1940                 }
1941         } else {
1942                 gdev->dev.type = &qeth_l3_devtype;
1943         }
1944
1945         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1946         return 0;
1947 }
1948
1949 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1950 {
1951         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1952
1953         if (cgdev->dev.type != &qeth_l3_devtype)
1954                 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1955
1956         qeth_set_allowed_threads(card, 0, 1);
1957         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1958
1959         if (cgdev->state == CCWGROUP_ONLINE)
1960                 qeth_set_offline(card, card->discipline, false);
1961
1962         if (card->dev->reg_state == NETREG_REGISTERED)
1963                 unregister_netdev(card->dev);
1964
1965         destroy_workqueue(card->cmd_wq);
1966         qeth_l3_clear_ip_htable(card, 0);
1967         qeth_l3_clear_ipato_list(card);
1968 }
1969
1970 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1971 {
1972         struct net_device *dev = card->dev;
1973         int rc = 0;
1974
1975         /* softsetup */
1976         QETH_CARD_TEXT(card, 2, "softsetp");
1977
1978         rc = qeth_l3_setadapter_parms(card);
1979         if (rc)
1980                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1981         if (!card->options.sniffer) {
1982                 qeth_l3_start_ipassists(card);
1983
1984                 rc = qeth_l3_setrouting_v4(card);
1985                 if (rc)
1986                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1987                 rc = qeth_l3_setrouting_v6(card);
1988                 if (rc)
1989                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
1990         }
1991
1992         card->state = CARD_STATE_SOFTSETUP;
1993
1994         qeth_set_allowed_threads(card, 0xffffffff, 0);
1995         qeth_l3_recover_ip(card);
1996
1997         if (dev->reg_state != NETREG_REGISTERED) {
1998                 rc = qeth_l3_setup_netdev(card);
1999                 if (rc)
2000                         goto err_setup;
2001
2002                 if (carrier_ok)
2003                         netif_carrier_on(dev);
2004         } else {
2005                 rtnl_lock();
2006                 rc = qeth_set_real_num_tx_queues(card,
2007                                                  qeth_tx_actual_queues(card));
2008                 if (rc) {
2009                         rtnl_unlock();
2010                         goto err_set_queues;
2011                 }
2012
2013                 if (carrier_ok)
2014                         netif_carrier_on(dev);
2015                 else
2016                         netif_carrier_off(dev);
2017
2018                 netif_device_attach(dev);
2019                 qeth_enable_hw_features(dev);
2020
2021                 if (netif_running(dev)) {
2022                         local_bh_disable();
2023                         napi_schedule(&card->napi);
2024                         /* kick-start the NAPI softirq: */
2025                         local_bh_enable();
2026                 }
2027                 rtnl_unlock();
2028         }
2029         return 0;
2030
2031 err_set_queues:
2032 err_setup:
2033         qeth_set_allowed_threads(card, 0, 1);
2034         card->state = CARD_STATE_DOWN;
2035         qeth_l3_clear_ip_htable(card, 1);
2036         return rc;
2037 }
2038
2039 static void qeth_l3_set_offline(struct qeth_card *card)
2040 {
2041         qeth_set_allowed_threads(card, 0, 1);
2042         qeth_l3_drain_rx_mode_cache(card);
2043
2044         if (card->options.sniffer &&
2045             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2046                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2047
2048         if (card->state == CARD_STATE_SOFTSETUP) {
2049                 card->state = CARD_STATE_DOWN;
2050                 qeth_l3_clear_ip_htable(card, 1);
2051         }
2052 }
2053
2054 /* Returns zero if the command is successfully "consumed" */
2055 static int qeth_l3_control_event(struct qeth_card *card,
2056                                         struct qeth_ipa_cmd *cmd)
2057 {
2058         return 1;
2059 }
2060
2061 const struct qeth_discipline qeth_l3_discipline = {
2062         .setup = qeth_l3_probe_device,
2063         .remove = qeth_l3_remove_device,
2064         .set_online = qeth_l3_set_online,
2065         .set_offline = qeth_l3_set_offline,
2066         .control_event_handler = qeth_l3_control_event,
2067 };
2068 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2069
2070 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2071                                    struct qeth_ipaddr *addr,
2072                                    unsigned long event)
2073 {
2074         switch (event) {
2075         case NETDEV_UP:
2076                 qeth_l3_modify_ip(card, addr, true);
2077                 return NOTIFY_OK;
2078         case NETDEV_DOWN:
2079                 qeth_l3_modify_ip(card, addr, false);
2080                 return NOTIFY_OK;
2081         default:
2082                 return NOTIFY_DONE;
2083         }
2084 }
2085
2086 struct qeth_l3_ip_event_work {
2087         struct work_struct work;
2088         struct qeth_card *card;
2089         struct qeth_ipaddr addr;
2090 };
2091
2092 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2093
2094 static void qeth_l3_add_ip_worker(struct work_struct *work)
2095 {
2096         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2097
2098         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2099         kfree(work);
2100 }
2101
2102 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2103 {
2104         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2105
2106         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2107         kfree(work);
2108 }
2109
2110 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2111 {
2112         if (is_vlan_dev(dev))
2113                 dev = vlan_dev_real_dev(dev);
2114         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2115             dev->netdev_ops == &qeth_l3_netdev_ops)
2116                 return (struct qeth_card *) dev->ml_priv;
2117         return NULL;
2118 }
2119
2120 static int qeth_l3_ip_event(struct notifier_block *this,
2121                             unsigned long event, void *ptr)
2122 {
2123         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2124         struct net_device *dev = ifa->ifa_dev->dev;
2125         struct qeth_ipaddr addr;
2126         struct qeth_card *card;
2127
2128         card = qeth_l3_get_card_from_dev(dev);
2129         if (!card)
2130                 return NOTIFY_DONE;
2131         QETH_CARD_TEXT(card, 3, "ipevent");
2132
2133         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2134         addr.u.a4.addr = ifa->ifa_address;
2135         addr.u.a4.mask = ifa->ifa_mask;
2136
2137         return qeth_l3_handle_ip_event(card, &addr, event);
2138 }
2139
2140 static struct notifier_block qeth_l3_ip_notifier = {
2141         qeth_l3_ip_event,
2142         NULL,
2143 };
2144
2145 static int qeth_l3_ip6_event(struct notifier_block *this,
2146                              unsigned long event, void *ptr)
2147 {
2148         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2149         struct net_device *dev = ifa->idev->dev;
2150         struct qeth_l3_ip_event_work *ip_work;
2151         struct qeth_card *card;
2152
2153         if (event != NETDEV_UP && event != NETDEV_DOWN)
2154                 return NOTIFY_DONE;
2155
2156         card = qeth_l3_get_card_from_dev(dev);
2157         if (!card)
2158                 return NOTIFY_DONE;
2159         QETH_CARD_TEXT(card, 3, "ip6event");
2160         if (!qeth_is_supported(card, IPA_IPV6))
2161                 return NOTIFY_DONE;
2162
2163         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2164         if (!ip_work)
2165                 return NOTIFY_DONE;
2166
2167         if (event == NETDEV_UP)
2168                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2169         else
2170                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2171
2172         ip_work->card = card;
2173         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2174                             QETH_PROT_IPV6);
2175         ip_work->addr.u.a6.addr = ifa->addr;
2176         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2177
2178         queue_work(card->cmd_wq, &ip_work->work);
2179         return NOTIFY_OK;
2180 }
2181
2182 static struct notifier_block qeth_l3_ip6_notifier = {
2183         qeth_l3_ip6_event,
2184         NULL,
2185 };
2186
2187 static int qeth_l3_register_notifiers(void)
2188 {
2189         int rc;
2190
2191         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2192         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2193         if (rc)
2194                 return rc;
2195         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2196         if (rc) {
2197                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2198                 return rc;
2199         }
2200         return 0;
2201 }
2202
2203 static void qeth_l3_unregister_notifiers(void)
2204 {
2205         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2206         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2207         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2208 }
2209
2210 static int __init qeth_l3_init(void)
2211 {
2212         pr_info("register layer 3 discipline\n");
2213         return qeth_l3_register_notifiers();
2214 }
2215
2216 static void __exit qeth_l3_exit(void)
2217 {
2218         qeth_l3_unregister_notifiers();
2219         pr_info("unregister layer 3 discipline\n");
2220 }
2221
2222 module_init(qeth_l3_init);
2223 module_exit(qeth_l3_exit);
2224 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
2225 MODULE_DESCRIPTION("qeth layer 3 discipline");
2226 MODULE_LICENSE("GPL");