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/ip6_fib.h>
  36 #include <net/iucv/af_iucv.h>
  37 #include <linux/hashtable.h>
  38
  39 #include "qeth_l3.h"
  40
  41
  42 static int qeth_l3_set_offline(struct ccwgroup_device *);
  43 static void qeth_l3_set_rx_mode(struct net_device *dev);
  44 static int qeth_l3_register_addr_entry(struct qeth_card *,
  45                 struct qeth_ipaddr *);
  46 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  47                 struct qeth_ipaddr *);
  48
  49 static void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
  50 {
  51         sprintf(buf, "%pI4", addr);
  52 }
  53
  54 static void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
  55 {
  56         sprintf(buf, "%pI6", addr);
  57 }
  58
  59 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
  60                                 char *buf)
  61 {
  62         if (proto == QETH_PROT_IPV4)
  63                 qeth_l3_ipaddr4_to_string(addr, buf);
  64         else if (proto == QETH_PROT_IPV6)
  65                 qeth_l3_ipaddr6_to_string(addr, buf);
  66 }
  67
  68 static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
  69 {
  70         struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
  71
  72         if (addr)
  73                 qeth_l3_init_ipaddr(addr, QETH_IP_TYPE_NORMAL, prot);
  74         return addr;
  75 }
  76
  77 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  78                                                    struct qeth_ipaddr *query)
  79 {
  80         u64 key = qeth_l3_ipaddr_hash(query);
  81         struct qeth_ipaddr *addr;
  82
  83         if (query->is_multicast) {
  84                 hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
  85                         if (qeth_l3_addr_match_ip(addr, query))
  86                                 return addr;
  87         } else {
  88                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  89                         if (qeth_l3_addr_match_ip(addr, query))
  90                                 return addr;
  91         }
  92         return NULL;
  93 }
  94
  95 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  96 {
  97         int i, j;
  98         u8 octet;
  99
 100         for (i = 0; i < len; ++i) {
 101                 octet = addr[i];
 102                 for (j = 7; j >= 0; --j) {
 103                         bits[i*8 + j] = octet & 1;
 104                         octet >>= 1;
 105                 }
 106         }
 107 }
 108
 109 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
 110                                              struct qeth_ipaddr *addr)
 111 {
 112         struct qeth_ipato_entry *ipatoe;
 113         u8 addr_bits[128] = {0, };
 114         u8 ipatoe_bits[128] = {0, };
 115         int rc = 0;
 116
 117         if (!card->ipato.enabled)
 118                 return false;
 119         if (addr->type != QETH_IP_TYPE_NORMAL)
 120                 return false;
 121
 122         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 123                                   (addr->proto == QETH_PROT_IPV4)? 4:16);
 124         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 125                 if (addr->proto != ipatoe->proto)
 126                         continue;
 127                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 128                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 129                                           4 : 16);
 130                 if (addr->proto == QETH_PROT_IPV4)
 131                         rc = !memcmp(addr_bits, ipatoe_bits,
 132                                      min(32, ipatoe->mask_bits));
 133                 else
 134                         rc = !memcmp(addr_bits, ipatoe_bits,
 135                                      min(128, ipatoe->mask_bits));
 136                 if (rc)
 137                         break;
 138         }
 139         /* invert? */
 140         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 141                 rc = !rc;
 142         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 143                 rc = !rc;
 144
 145         return rc;
 146 }
 147
 148 static int qeth_l3_delete_ip(struct qeth_card *card,
 149                              struct qeth_ipaddr *tmp_addr)
 150 {
 151         int rc = 0;
 152         struct qeth_ipaddr *addr;
 153
 154         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 155                 QETH_CARD_TEXT(card, 2, "delrxip");
 156         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 157                 QETH_CARD_TEXT(card, 2, "delvipa");
 158         else
 159                 QETH_CARD_TEXT(card, 2, "delip");
 160
 161         if (tmp_addr->proto == QETH_PROT_IPV4)
 162                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 163         else {
 164                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 165                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 166         }
 167
 168         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 169         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 170                 return -ENOENT;
 171
 172         addr->ref_counter--;
 173         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 174                 return rc;
 175         if (addr->in_progress)
 176                 return -EINPROGRESS;
 177
 178         if (qeth_card_hw_is_reachable(card))
 179                 rc = qeth_l3_deregister_addr_entry(card, addr);
 180
 181         hash_del(&addr->hnode);
 182         kfree(addr);
 183
 184         return rc;
 185 }
 186
 187 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 188 {
 189         int rc = 0;
 190         struct qeth_ipaddr *addr;
 191         char buf[40];
 192
 193         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 194                 QETH_CARD_TEXT(card, 2, "addrxip");
 195         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 196                 QETH_CARD_TEXT(card, 2, "addvipa");
 197         else
 198                 QETH_CARD_TEXT(card, 2, "addip");
 199
 200         if (tmp_addr->proto == QETH_PROT_IPV4)
 201                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 202         else {
 203                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 204                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 205         }
 206
 207         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 208         if (addr) {
 209                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 210                         return -EADDRINUSE;
 211                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 212                         addr->ref_counter++;
 213                         return 0;
 214                 }
 215                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 216                                          buf);
 217                 dev_warn(&card->gdev->dev,
 218                          "Registering IP address %s failed\n", buf);
 219                 return -EADDRINUSE;
 220         } else {
 221                 addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
 222                 if (!addr)
 223                         return -ENOMEM;
 224
 225                 memcpy(addr, tmp_addr, sizeof(struct qeth_ipaddr));
 226                 addr->ref_counter = 1;
 227
 228                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 229                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 230                         addr->ipato = 1;
 231                 }
 232                 hash_add(card->ip_htable, &addr->hnode,
 233                                 qeth_l3_ipaddr_hash(addr));
 234
 235                 if (!qeth_card_hw_is_reachable(card)) {
 236                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 237                         return 0;
 238                 }
 239
 240                 /* qeth_l3_register_addr_entry can go to sleep
 241                  * if we add a IPV4 addr. It is caused by the reason
 242                  * that SETIP ipa cmd starts ARP staff for IPV4 addr.
 243                  * Thus we should unlock spinlock, and make a protection
 244                  * using in_progress variable to indicate that there is
 245                  * an hardware operation with this IPV4 address
 246                  */
 247                 if (addr->proto == QETH_PROT_IPV4) {
 248                         addr->in_progress = 1;
 249                         spin_unlock_bh(&card->ip_lock);
 250                         rc = qeth_l3_register_addr_entry(card, addr);
 251                         spin_lock_bh(&card->ip_lock);
 252                         addr->in_progress = 0;
 253                 } else
 254                         rc = qeth_l3_register_addr_entry(card, addr);
 255
 256                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 257                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 258                         if (addr->ref_counter < 1) {
 259                                 qeth_l3_deregister_addr_entry(card, addr);
 260                                 hash_del(&addr->hnode);
 261                                 kfree(addr);
 262                         }
 263                 } else {
 264                         hash_del(&addr->hnode);
 265                         kfree(addr);
 266                 }
 267         }
 268         return rc;
 269 }
 270
 271 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 272 {
 273         struct qeth_ipaddr *addr;
 274         struct hlist_node *tmp;
 275         int i;
 276
 277         QETH_CARD_TEXT(card, 4, "clearip");
 278
 279         spin_lock_bh(&card->ip_lock);
 280
 281         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 282                 if (!recover) {
 283                         hash_del(&addr->hnode);
 284                         kfree(addr);
 285                         continue;
 286                 }
 287                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 288         }
 289
 290         spin_unlock_bh(&card->ip_lock);
 291
 292         spin_lock_bh(&card->mclock);
 293
 294         hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
 295                 hash_del(&addr->hnode);
 296                 kfree(addr);
 297         }
 298
 299         spin_unlock_bh(&card->mclock);
 300
 301
 302 }
 303 static void qeth_l3_recover_ip(struct qeth_card *card)
 304 {
 305         struct qeth_ipaddr *addr;
 306         struct hlist_node *tmp;
 307         int i;
 308         int rc;
 309
 310         QETH_CARD_TEXT(card, 4, "recovrip");
 311
 312         spin_lock_bh(&card->ip_lock);
 313
 314         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 315                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 316                         if (addr->proto == QETH_PROT_IPV4) {
 317                                 addr->in_progress = 1;
 318                                 spin_unlock_bh(&card->ip_lock);
 319                                 rc = qeth_l3_register_addr_entry(card, addr);
 320                                 spin_lock_bh(&card->ip_lock);
 321                                 addr->in_progress = 0;
 322                         } else
 323                                 rc = qeth_l3_register_addr_entry(card, addr);
 324
 325                         if (!rc) {
 326                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 327                                 if (addr->ref_counter < 1)
 328                                         qeth_l3_delete_ip(card, addr);
 329                         } else {
 330                                 hash_del(&addr->hnode);
 331                                 kfree(addr);
 332                         }
 333                 }
 334         }
 335
 336         spin_unlock_bh(&card->ip_lock);
 337
 338 }
 339
 340 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 341                                unsigned long data)
 342 {
 343         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 344
 345         switch (cmd->hdr.return_code) {
 346         case IPA_RC_SUCCESS:
 347                 return 0;
 348         case IPA_RC_DUPLICATE_IP_ADDRESS:
 349                 return -EADDRINUSE;
 350         case IPA_RC_MC_ADDR_NOT_FOUND:
 351                 return -ENOENT;
 352         case IPA_RC_LAN_OFFLINE:
 353                 return -ENETDOWN;
 354         default:
 355                 return -EIO;
 356         }
 357 }
 358
 359 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 360                         struct qeth_ipaddr *addr, int ipacmd)
 361 {
 362         struct qeth_cmd_buffer *iob;
 363         struct qeth_ipa_cmd *cmd;
 364
 365         QETH_CARD_TEXT(card, 4, "setdelmc");
 366
 367         iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
 368         if (!iob)
 369                 return -ENOMEM;
 370         cmd = __ipa_cmd(iob);
 371         ether_addr_copy(cmd->data.setdelipm.mac, addr->mac);
 372         if (addr->proto == QETH_PROT_IPV6)
 373                 memcpy(cmd->data.setdelipm.ip6, &addr->u.a6.addr,
 374                        sizeof(struct in6_addr));
 375         else
 376                 memcpy(&cmd->data.setdelipm.ip4, &addr->u.a4.addr, 4);
 377
 378         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 379 }
 380
 381 static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
 382 {
 383         int i, j;
 384         for (i = 0; i < 16; i++) {
 385                 j = (len) - (i * 8);
 386                 if (j >= 8)
 387                         netmask[i] = 0xff;
 388                 else if (j > 0)
 389                         netmask[i] = (u8)(0xFF00 >> j);
 390                 else
 391                         netmask[i] = 0;
 392         }
 393 }
 394
 395 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 396 {
 397         switch (addr->type) {
 398         case QETH_IP_TYPE_RXIP:
 399                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 400         case QETH_IP_TYPE_VIPA:
 401                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 402                                QETH_IPA_DELIP_VIPA_FLAG;
 403         default:
 404                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 405         }
 406 }
 407
 408 static int qeth_l3_send_setdelip(struct qeth_card *card,
 409                                  struct qeth_ipaddr *addr,
 410                                  enum qeth_ipa_cmds ipacmd)
 411 {
 412         struct qeth_cmd_buffer *iob;
 413         struct qeth_ipa_cmd *cmd;
 414         __u8 netmask[16];
 415         u32 flags;
 416
 417         QETH_CARD_TEXT(card, 4, "setdelip");
 418
 419         iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
 420         if (!iob)
 421                 return -ENOMEM;
 422         cmd = __ipa_cmd(iob);
 423
 424         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 425         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 426
 427         if (addr->proto == QETH_PROT_IPV6) {
 428                 memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
 429                        sizeof(struct in6_addr));
 430                 qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
 431                 memcpy(cmd->data.setdelip6.mask, netmask,
 432                        sizeof(struct in6_addr));
 433                 cmd->data.setdelip6.flags = flags;
 434         } else {
 435                 memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
 436                 memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
 437                 cmd->data.setdelip4.flags = flags;
 438         }
 439
 440         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 441 }
 442
 443 static int qeth_l3_send_setrouting(struct qeth_card *card,
 444         enum qeth_routing_types type, enum qeth_prot_versions prot)
 445 {
 446         int rc;
 447         struct qeth_ipa_cmd *cmd;
 448         struct qeth_cmd_buffer *iob;
 449
 450         QETH_CARD_TEXT(card, 4, "setroutg");
 451         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETRTG, prot);
 452         if (!iob)
 453                 return -ENOMEM;
 454         cmd = __ipa_cmd(iob);
 455         cmd->data.setrtg.type = (type);
 456         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 457
 458         return rc;
 459 }
 460
 461 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 462                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 463 {
 464         if (card->info.type == QETH_CARD_TYPE_IQD) {
 465                 switch (*type) {
 466                 case NO_ROUTER:
 467                 case PRIMARY_CONNECTOR:
 468                 case SECONDARY_CONNECTOR:
 469                 case MULTICAST_ROUTER:
 470                         return 0;
 471                 default:
 472                         goto out_inval;
 473                 }
 474         } else {
 475                 switch (*type) {
 476                 case NO_ROUTER:
 477                 case PRIMARY_ROUTER:
 478                 case SECONDARY_ROUTER:
 479                         return 0;
 480                 case MULTICAST_ROUTER:
 481                         if (qeth_is_ipafunc_supported(card, prot,
 482                                                       IPA_OSA_MC_ROUTER))
 483                                 return 0;
 484                 default:
 485                         goto out_inval;
 486                 }
 487         }
 488 out_inval:
 489         *type = NO_ROUTER;
 490         return -EINVAL;
 491 }
 492
 493 int qeth_l3_setrouting_v4(struct qeth_card *card)
 494 {
 495         int rc;
 496
 497         QETH_CARD_TEXT(card, 3, "setrtg4");
 498
 499         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 500                                   QETH_PROT_IPV4);
 501         if (rc)
 502                 return rc;
 503
 504         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 505                                   QETH_PROT_IPV4);
 506         if (rc) {
 507                 card->options.route4.type = NO_ROUTER;
 508                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 509                                  rc, CARD_DEVID(card));
 510         }
 511         return rc;
 512 }
 513
 514 int qeth_l3_setrouting_v6(struct qeth_card *card)
 515 {
 516         int rc = 0;
 517
 518         QETH_CARD_TEXT(card, 3, "setrtg6");
 519
 520         if (!qeth_is_supported(card, IPA_IPV6))
 521                 return 0;
 522         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 523                                   QETH_PROT_IPV6);
 524         if (rc)
 525                 return rc;
 526
 527         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 528                                   QETH_PROT_IPV6);
 529         if (rc) {
 530                 card->options.route6.type = NO_ROUTER;
 531                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 532                                  rc, CARD_DEVID(card));
 533         }
 534         return rc;
 535 }
 536
 537 /*
 538  * IP address takeover related functions
 539  */
 540
 541 /**
 542  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 543  *
 544  * Caller must hold ip_lock.
 545  */
 546 void qeth_l3_update_ipato(struct qeth_card *card)
 547 {
 548         struct qeth_ipaddr *addr;
 549         unsigned int i;
 550
 551         hash_for_each(card->ip_htable, i, addr, hnode) {
 552                 if (addr->type != QETH_IP_TYPE_NORMAL)
 553                         continue;
 554                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 555         }
 556 }
 557
 558 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 559 {
 560         struct qeth_ipato_entry *ipatoe, *tmp;
 561
 562         spin_lock_bh(&card->ip_lock);
 563
 564         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 565                 list_del(&ipatoe->entry);
 566                 kfree(ipatoe);
 567         }
 568
 569         qeth_l3_update_ipato(card);
 570         spin_unlock_bh(&card->ip_lock);
 571 }
 572
 573 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 574                                 struct qeth_ipato_entry *new)
 575 {
 576         struct qeth_ipato_entry *ipatoe;
 577         int rc = 0;
 578
 579         QETH_CARD_TEXT(card, 2, "addipato");
 580
 581         spin_lock_bh(&card->ip_lock);
 582
 583         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 584                 if (ipatoe->proto != new->proto)
 585                         continue;
 586                 if (!memcmp(ipatoe->addr, new->addr,
 587                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 588                     (ipatoe->mask_bits == new->mask_bits)) {
 589                         rc = -EEXIST;
 590                         break;
 591                 }
 592         }
 593
 594         if (!rc) {
 595                 list_add_tail(&new->entry, &card->ipato.entries);
 596                 qeth_l3_update_ipato(card);
 597         }
 598
 599         spin_unlock_bh(&card->ip_lock);
 600
 601         return rc;
 602 }
 603
 604 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 605                             enum qeth_prot_versions proto, u8 *addr,
 606                             int mask_bits)
 607 {
 608         struct qeth_ipato_entry *ipatoe, *tmp;
 609         int rc = -ENOENT;
 610
 611         QETH_CARD_TEXT(card, 2, "delipato");
 612
 613         spin_lock_bh(&card->ip_lock);
 614
 615         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 616                 if (ipatoe->proto != proto)
 617                         continue;
 618                 if (!memcmp(ipatoe->addr, addr,
 619                             (proto == QETH_PROT_IPV4)? 4:16) &&
 620                     (ipatoe->mask_bits == mask_bits)) {
 621                         list_del(&ipatoe->entry);
 622                         qeth_l3_update_ipato(card);
 623                         kfree(ipatoe);
 624                         rc = 0;
 625                 }
 626         }
 627
 628         spin_unlock_bh(&card->ip_lock);
 629         return rc;
 630 }
 631
 632 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 633                              enum qeth_ip_types type,
 634                              enum qeth_prot_versions proto)
 635 {
 636         struct qeth_ipaddr addr;
 637         int rc;
 638
 639         qeth_l3_init_ipaddr(&addr, type, proto);
 640         if (proto == QETH_PROT_IPV4)
 641                 memcpy(&addr.u.a4.addr, ip, 4);
 642         else
 643                 memcpy(&addr.u.a6.addr, ip, 16);
 644
 645         spin_lock_bh(&card->ip_lock);
 646         rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
 647         spin_unlock_bh(&card->ip_lock);
 648         return rc;
 649 }
 650
 651 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 652 {
 653         struct qeth_ipaddr addr;
 654         int rc, i;
 655
 656         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 657         addr.u.a6.addr.s6_addr[0] = 0xfe;
 658         addr.u.a6.addr.s6_addr[1] = 0x80;
 659         for (i = 0; i < 8; i++)
 660                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 661
 662         spin_lock_bh(&card->ip_lock);
 663         rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
 664         spin_unlock_bh(&card->ip_lock);
 665         return rc;
 666 }
 667
 668 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 669                                 struct qeth_ipaddr *addr)
 670 {
 671         char buf[50];
 672         int rc = 0;
 673         int cnt = 3;
 674
 675         if (card->options.sniffer)
 676                 return 0;
 677
 678         if (addr->proto == QETH_PROT_IPV4) {
 679                 QETH_CARD_TEXT(card, 2, "setaddr4");
 680                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 681         } else if (addr->proto == QETH_PROT_IPV6) {
 682                 QETH_CARD_TEXT(card, 2, "setaddr6");
 683                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 684                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 685         } else {
 686                 QETH_CARD_TEXT(card, 2, "setaddr?");
 687                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 688         }
 689         do {
 690                 if (addr->is_multicast)
 691                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 692                 else
 693                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 694                 if (rc)
 695                         QETH_CARD_TEXT(card, 2, "failed");
 696         } while ((--cnt > 0) && rc);
 697         if (rc) {
 698                 QETH_CARD_TEXT(card, 2, "FAILED");
 699                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 700                 dev_warn(&card->gdev->dev,
 701                         "Registering IP address %s failed\n", buf);
 702         }
 703         return rc;
 704 }
 705
 706 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 707                                                 struct qeth_ipaddr *addr)
 708 {
 709         int rc = 0;
 710
 711         if (card->options.sniffer)
 712                 return 0;
 713
 714         if (addr->proto == QETH_PROT_IPV4) {
 715                 QETH_CARD_TEXT(card, 2, "deladdr4");
 716                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 717         } else if (addr->proto == QETH_PROT_IPV6) {
 718                 QETH_CARD_TEXT(card, 2, "deladdr6");
 719                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 720                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 721         } else {
 722                 QETH_CARD_TEXT(card, 2, "deladdr?");
 723                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 724         }
 725         if (addr->is_multicast)
 726                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 727         else
 728                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 729         if (rc)
 730                 QETH_CARD_TEXT(card, 2, "failed");
 731
 732         return rc;
 733 }
 734
 735 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 736 {
 737         int rc = 0;
 738
 739         QETH_DBF_TEXT(SETUP, 2, "setadprm");
 740
 741         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 742                 rc = qeth_setadpparms_change_macaddr(card);
 743                 if (rc)
 744                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 745                                 " address failed\n");
 746         }
 747
 748         return rc;
 749 }
 750
 751 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 752 {
 753         int rc;
 754
 755         QETH_CARD_TEXT(card, 3, "ipaarp");
 756
 757         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 758                 dev_info(&card->gdev->dev,
 759                         "ARP processing not supported on %s!\n",
 760                         QETH_CARD_IFNAME(card));
 761                 return 0;
 762         }
 763         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 764                                           IPA_CMD_ASS_START, 0);
 765         if (rc) {
 766                 dev_warn(&card->gdev->dev,
 767                         "Starting ARP processing support for %s failed\n",
 768                         QETH_CARD_IFNAME(card));
 769         }
 770         return rc;
 771 }
 772
 773 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 774 {
 775         int rc;
 776
 777         QETH_CARD_TEXT(card, 3, "stsrcmac");
 778
 779         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 780                 dev_info(&card->gdev->dev,
 781                         "Inbound source MAC-address not supported on %s\n",
 782                         QETH_CARD_IFNAME(card));
 783                 return -EOPNOTSUPP;
 784         }
 785
 786         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 787                                           IPA_CMD_ASS_START, 0);
 788         if (rc)
 789                 dev_warn(&card->gdev->dev,
 790                         "Starting source MAC-address support for %s failed\n",
 791                         QETH_CARD_IFNAME(card));
 792         return rc;
 793 }
 794
 795 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 796 {
 797         int rc = 0;
 798
 799         QETH_CARD_TEXT(card, 3, "strtvlan");
 800
 801         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 802                 dev_info(&card->gdev->dev,
 803                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 804                 return -EOPNOTSUPP;
 805         }
 806
 807         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 808                                           IPA_CMD_ASS_START, 0);
 809         if (rc) {
 810                 dev_warn(&card->gdev->dev,
 811                         "Starting VLAN support for %s failed\n",
 812                         QETH_CARD_IFNAME(card));
 813         } else {
 814                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 815         }
 816         return rc;
 817 }
 818
 819 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 820 {
 821         int rc;
 822
 823         QETH_CARD_TEXT(card, 3, "stmcast");
 824
 825         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 826                 dev_info(&card->gdev->dev,
 827                         "Multicast not supported on %s\n",
 828                         QETH_CARD_IFNAME(card));
 829                 return -EOPNOTSUPP;
 830         }
 831
 832         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 833                                           IPA_CMD_ASS_START, 0);
 834         if (rc) {
 835                 dev_warn(&card->gdev->dev,
 836                         "Starting multicast support for %s failed\n",
 837                         QETH_CARD_IFNAME(card));
 838         } else {
 839                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 840                 card->dev->flags |= IFF_MULTICAST;
 841         }
 842         return rc;
 843 }
 844
 845 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 846 {
 847         int rc;
 848
 849         QETH_CARD_TEXT(card, 3, "softipv6");
 850
 851         if (card->info.type == QETH_CARD_TYPE_IQD)
 852                 goto out;
 853
 854         rc = qeth_send_simple_setassparms(card, IPA_IPV6,
 855                                           IPA_CMD_ASS_START, 3);
 856         if (rc) {
 857                 dev_err(&card->gdev->dev,
 858                         "Activating IPv6 support for %s failed\n",
 859                         QETH_CARD_IFNAME(card));
 860                 return rc;
 861         }
 862         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6,
 863                                              IPA_CMD_ASS_START, 0);
 864         if (rc) {
 865                 dev_err(&card->gdev->dev,
 866                         "Activating IPv6 support for %s failed\n",
 867                          QETH_CARD_IFNAME(card));
 868                 return rc;
 869         }
 870         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 871                                              IPA_CMD_ASS_START, 0);
 872         if (rc) {
 873                 dev_warn(&card->gdev->dev,
 874                         "Enabling the passthrough mode for %s failed\n",
 875                         QETH_CARD_IFNAME(card));
 876                 return rc;
 877         }
 878 out:
 879         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 880         return 0;
 881 }
 882
 883 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 884 {
 885         QETH_CARD_TEXT(card, 3, "strtipv6");
 886
 887         if (!qeth_is_supported(card, IPA_IPV6)) {
 888                 dev_info(&card->gdev->dev,
 889                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 890                 return 0;
 891         }
 892         return qeth_l3_softsetup_ipv6(card);
 893 }
 894
 895 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 896 {
 897         int rc;
 898
 899         QETH_CARD_TEXT(card, 3, "stbrdcst");
 900         card->info.broadcast_capable = 0;
 901         if (!qeth_is_supported(card, IPA_FILTERING)) {
 902                 dev_info(&card->gdev->dev,
 903                         "Broadcast not supported on %s\n",
 904                         QETH_CARD_IFNAME(card));
 905                 rc = -EOPNOTSUPP;
 906                 goto out;
 907         }
 908         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 909                                           IPA_CMD_ASS_START, 0);
 910         if (rc) {
 911                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 912                         "%s failed\n", QETH_CARD_IFNAME(card));
 913                 goto out;
 914         }
 915
 916         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 917                                           IPA_CMD_ASS_CONFIGURE, 1);
 918         if (rc) {
 919                 dev_warn(&card->gdev->dev,
 920                         "Setting up broadcast filtering for %s failed\n",
 921                         QETH_CARD_IFNAME(card));
 922                 goto out;
 923         }
 924         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 925         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 926         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 927                                           IPA_CMD_ASS_ENABLE, 1);
 928         if (rc) {
 929                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 930                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 931                 goto out;
 932         }
 933         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 934 out:
 935         if (card->info.broadcast_capable)
 936                 card->dev->flags |= IFF_BROADCAST;
 937         else
 938                 card->dev->flags &= ~IFF_BROADCAST;
 939         return rc;
 940 }
 941
 942 static int qeth_l3_start_ipassists(struct qeth_card *card)
 943 {
 944         QETH_CARD_TEXT(card, 3, "strtipas");
 945
 946         if (qeth_set_access_ctrl_online(card, 0))
 947                 return -EIO;
 948         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 949         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 950         qeth_l3_start_ipa_vlan(card);           /* go on*/
 951         qeth_l3_start_ipa_multicast(card);              /* go on*/
 952         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 953         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 954         return 0;
 955 }
 956
 957 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 958                 struct qeth_reply *reply, unsigned long data)
 959 {
 960         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 961
 962         if (cmd->hdr.return_code)
 963                 return -EIO;
 964
 965         ether_addr_copy(card->dev->dev_addr,
 966                         cmd->data.create_destroy_addr.unique_id);
 967         return 0;
 968 }
 969
 970 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 971 {
 972         int rc = 0;
 973         struct qeth_cmd_buffer *iob;
 974         struct qeth_ipa_cmd *cmd;
 975
 976         QETH_DBF_TEXT(SETUP, 2, "hsrmac");
 977
 978         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
 979                                      QETH_PROT_IPV6);
 980         if (!iob)
 981                 return -ENOMEM;
 982         cmd = __ipa_cmd(iob);
 983         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
 984                         card->info.unique_id;
 985
 986         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 987                                 NULL);
 988         return rc;
 989 }
 990
 991 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 992                 struct qeth_reply *reply, unsigned long data)
 993 {
 994         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 995
 996         if (cmd->hdr.return_code == 0) {
 997                 card->info.unique_id = *((__u16 *)
 998                                 &cmd->data.create_destroy_addr.unique_id[6]);
 999                 return 0;
1000         }
1001
1002         card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1003                                UNIQUE_ID_NOT_BY_CARD;
1004         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
1005         return -EIO;
1006 }
1007
1008 static int qeth_l3_get_unique_id(struct qeth_card *card)
1009 {
1010         int rc = 0;
1011         struct qeth_cmd_buffer *iob;
1012         struct qeth_ipa_cmd *cmd;
1013
1014         QETH_DBF_TEXT(SETUP, 2, "guniqeid");
1015
1016         if (!qeth_is_supported(card, IPA_IPV6)) {
1017                 card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1018                                         UNIQUE_ID_NOT_BY_CARD;
1019                 return 0;
1020         }
1021
1022         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
1023                                      QETH_PROT_IPV6);
1024         if (!iob)
1025                 return -ENOMEM;
1026         cmd = __ipa_cmd(iob);
1027         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
1028                         card->info.unique_id;
1029
1030         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
1031         return rc;
1032 }
1033
1034 static int
1035 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
1036                             unsigned long data)
1037 {
1038         struct qeth_ipa_cmd        *cmd;
1039         __u16 rc;
1040
1041         QETH_DBF_TEXT(SETUP, 2, "diastrcb");
1042
1043         cmd = (struct qeth_ipa_cmd *)data;
1044         rc = cmd->hdr.return_code;
1045         if (rc)
1046                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
1047         switch (cmd->data.diagass.action) {
1048         case QETH_DIAGS_CMD_TRACE_QUERY:
1049                 break;
1050         case QETH_DIAGS_CMD_TRACE_DISABLE:
1051                 switch (rc) {
1052                 case 0:
1053                 case IPA_RC_INVALID_SUBCMD:
1054                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1055                         dev_info(&card->gdev->dev, "The HiperSockets network "
1056                                 "traffic analyzer is deactivated\n");
1057                         break;
1058                 default:
1059                         break;
1060                 }
1061                 break;
1062         case QETH_DIAGS_CMD_TRACE_ENABLE:
1063                 switch (rc) {
1064                 case 0:
1065                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1066                         dev_info(&card->gdev->dev, "The HiperSockets network "
1067                                 "traffic analyzer is activated\n");
1068                         break;
1069                 case IPA_RC_HARDWARE_AUTH_ERROR:
1070                         dev_warn(&card->gdev->dev, "The device is not "
1071                                 "authorized to run as a HiperSockets network "
1072                                 "traffic analyzer\n");
1073                         break;
1074                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1075                         dev_warn(&card->gdev->dev, "A HiperSockets "
1076                                 "network traffic analyzer is already "
1077                                 "active in the HiperSockets LAN\n");
1078                         break;
1079                 default:
1080                         break;
1081                 }
1082                 break;
1083         default:
1084                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1085                                  cmd->data.diagass.action, CARD_DEVID(card));
1086         }
1087
1088         return rc ? -EIO : 0;
1089 }
1090
1091 static int
1092 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1093 {
1094         struct qeth_cmd_buffer *iob;
1095         struct qeth_ipa_cmd    *cmd;
1096
1097         QETH_DBF_TEXT(SETUP, 2, "diagtrac");
1098
1099         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
1100         if (!iob)
1101                 return -ENOMEM;
1102         cmd = __ipa_cmd(iob);
1103         cmd->data.diagass.subcmd_len = 16;
1104         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRACE;
1105         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1106         cmd->data.diagass.action = diags_cmd;
1107         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1108 }
1109
1110 static void
1111 qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
1112 {
1113         struct ip_mc_list *im4;
1114         struct qeth_ipaddr *tmp, *ipm;
1115
1116         QETH_CARD_TEXT(card, 4, "addmc");
1117
1118         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1119         if (!tmp)
1120                 return;
1121
1122         for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1123              im4 = rcu_dereference(im4->next_rcu)) {
1124                 ip_eth_mc_map(im4->multiaddr, tmp->mac);
1125                 tmp->u.a4.addr = be32_to_cpu(im4->multiaddr);
1126                 tmp->is_multicast = 1;
1127
1128                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1129                 if (ipm) {
1130                         /* for mcast, by-IP match means full match */
1131                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1132                 } else {
1133                         ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1134                         if (!ipm)
1135                                 continue;
1136                         ether_addr_copy(ipm->mac, tmp->mac);
1137                         ipm->u.a4.addr = be32_to_cpu(im4->multiaddr);
1138                         ipm->is_multicast = 1;
1139                         ipm->disp_flag = QETH_DISP_ADDR_ADD;
1140                         hash_add(card->ip_mc_htable,
1141                                         &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1142                 }
1143         }
1144
1145         kfree(tmp);
1146 }
1147
1148 /* called with rcu_read_lock */
1149 static void qeth_l3_add_vlan_mc(struct qeth_card *card)
1150 {
1151         struct in_device *in_dev;
1152         u16 vid;
1153
1154         QETH_CARD_TEXT(card, 4, "addmcvl");
1155
1156         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1157                 return;
1158
1159         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1160                 struct net_device *netdev;
1161
1162                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1163                                               vid);
1164                 if (netdev == NULL ||
1165                     !(netdev->flags & IFF_UP))
1166                         continue;
1167                 in_dev = __in_dev_get_rcu(netdev);
1168                 if (!in_dev)
1169                         continue;
1170                 qeth_l3_add_mc_to_hash(card, in_dev);
1171         }
1172 }
1173
1174 static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
1175 {
1176         struct in_device *in4_dev;
1177
1178         QETH_CARD_TEXT(card, 4, "chkmcv4");
1179
1180         rcu_read_lock();
1181         in4_dev = __in_dev_get_rcu(card->dev);
1182         if (in4_dev == NULL)
1183                 goto unlock;
1184         qeth_l3_add_mc_to_hash(card, in4_dev);
1185         qeth_l3_add_vlan_mc(card);
1186 unlock:
1187         rcu_read_unlock();
1188 }
1189
1190 static void qeth_l3_add_mc6_to_hash(struct qeth_card *card,
1191                                     struct inet6_dev *in6_dev)
1192 {
1193         struct qeth_ipaddr *ipm;
1194         struct ifmcaddr6 *im6;
1195         struct qeth_ipaddr *tmp;
1196
1197         QETH_CARD_TEXT(card, 4, "addmc6");
1198
1199         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1200         if (!tmp)
1201                 return;
1202
1203         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1204                 ipv6_eth_mc_map(&im6->mca_addr, tmp->mac);
1205                 memcpy(&tmp->u.a6.addr, &im6->mca_addr.s6_addr,
1206                        sizeof(struct in6_addr));
1207                 tmp->is_multicast = 1;
1208
1209                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1210                 if (ipm) {
1211                         /* for mcast, by-IP match means full match */
1212                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1213                         continue;
1214                 }
1215
1216                 ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1217                 if (!ipm)
1218                         continue;
1219
1220                 ether_addr_copy(ipm->mac, tmp->mac);
1221                 memcpy(&ipm->u.a6.addr, &im6->mca_addr.s6_addr,
1222                        sizeof(struct in6_addr));
1223                 ipm->is_multicast = 1;
1224                 ipm->disp_flag = QETH_DISP_ADDR_ADD;
1225                 hash_add(card->ip_mc_htable,
1226                                 &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1227
1228         }
1229         kfree(tmp);
1230 }
1231
1232 /* called with rcu_read_lock */
1233 static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
1234 {
1235         struct inet6_dev *in_dev;
1236         u16 vid;
1237
1238         QETH_CARD_TEXT(card, 4, "admc6vl");
1239
1240         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1241                 return;
1242
1243         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1244                 struct net_device *netdev;
1245
1246                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1247                                               vid);
1248                 if (netdev == NULL ||
1249                     !(netdev->flags & IFF_UP))
1250                         continue;
1251                 in_dev = in6_dev_get(netdev);
1252                 if (!in_dev)
1253                         continue;
1254                 read_lock_bh(&in_dev->lock);
1255                 qeth_l3_add_mc6_to_hash(card, in_dev);
1256                 read_unlock_bh(&in_dev->lock);
1257                 in6_dev_put(in_dev);
1258         }
1259 }
1260
1261 static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
1262 {
1263         struct inet6_dev *in6_dev;
1264
1265         QETH_CARD_TEXT(card, 4, "chkmcv6");
1266
1267         if (!qeth_is_supported(card, IPA_IPV6))
1268                 return ;
1269         in6_dev = in6_dev_get(card->dev);
1270         if (!in6_dev)
1271                 return;
1272
1273         rcu_read_lock();
1274         read_lock_bh(&in6_dev->lock);
1275         qeth_l3_add_mc6_to_hash(card, in6_dev);
1276         qeth_l3_add_vlan_mc6(card);
1277         read_unlock_bh(&in6_dev->lock);
1278         rcu_read_unlock();
1279         in6_dev_put(in6_dev);
1280 }
1281
1282 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1283                                    __be16 proto, u16 vid)
1284 {
1285         struct qeth_card *card = dev->ml_priv;
1286
1287         set_bit(vid, card->active_vlans);
1288         return 0;
1289 }
1290
1291 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1292                                     __be16 proto, u16 vid)
1293 {
1294         struct qeth_card *card = dev->ml_priv;
1295
1296         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1297
1298         clear_bit(vid, card->active_vlans);
1299         qeth_l3_set_rx_mode(dev);
1300         return 0;
1301 }
1302
1303 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
1304                                 struct qeth_hdr *hdr)
1305 {
1306         if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
1307                 u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
1308                                                                  ETH_P_IP;
1309                 unsigned char tg_addr[ETH_ALEN];
1310
1311                 skb_reset_network_header(skb);
1312                 switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
1313                 case QETH_CAST_MULTICAST:
1314                         if (prot == ETH_P_IP)
1315                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
1316                         else
1317                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
1318                         QETH_CARD_STAT_INC(card, rx_multicast);
1319                         break;
1320                 case QETH_CAST_BROADCAST:
1321                         ether_addr_copy(tg_addr, card->dev->broadcast);
1322                         QETH_CARD_STAT_INC(card, rx_multicast);
1323                         break;
1324                 default:
1325                         if (card->options.sniffer)
1326                                 skb->pkt_type = PACKET_OTHERHOST;
1327                         ether_addr_copy(tg_addr, card->dev->dev_addr);
1328                 }
1329
1330                 if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
1331                         card->dev->header_ops->create(skb, card->dev, prot,
1332                                 tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
1333                                 skb->len);
1334                 else
1335                         card->dev->header_ops->create(skb, card->dev, prot,
1336                                 tg_addr, "FAKELL", skb->len);
1337         }
1338
1339         skb->protocol = eth_type_trans(skb, card->dev);
1340
1341         /* copy VLAN tag from hdr into skb */
1342         if (!card->options.sniffer &&
1343             (hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
1344                                       QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
1345                 u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
1346                                 hdr->hdr.l3.vlan_id :
1347                                 hdr->hdr.l3.next_hop.rx.vlan_id;
1348                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
1349         }
1350
1351         qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
1352 }
1353
1354 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
1355                                 int budget, int *done)
1356 {
1357         struct net_device *dev = card->dev;
1358         int work_done = 0;
1359         struct sk_buff *skb;
1360         struct qeth_hdr *hdr;
1361         unsigned int len;
1362         __u16 magic;
1363
1364         *done = 0;
1365         WARN_ON_ONCE(!budget);
1366         while (budget) {
1367                 skb = qeth_core_get_next_skb(card,
1368                         &card->qdio.in_q->bufs[card->rx.b_index],
1369                         &card->rx.b_element, &card->rx.e_offset, &hdr);
1370                 if (!skb) {
1371                         *done = 1;
1372                         break;
1373                 }
1374                 switch (hdr->hdr.l3.id) {
1375                 case QETH_HEADER_TYPE_LAYER3:
1376                         magic = *(__u16 *)skb->data;
1377                         if ((card->info.type == QETH_CARD_TYPE_IQD) &&
1378                             (magic == ETH_P_AF_IUCV)) {
1379                                 len = skb->len;
1380                                 dev_hard_header(skb, dev, ETH_P_AF_IUCV,
1381                                                 dev->dev_addr, "FAKELL", len);
1382                                 skb->protocol = eth_type_trans(skb, dev);
1383                                 netif_receive_skb(skb);
1384                         } else {
1385                                 qeth_l3_rebuild_skb(card, skb, hdr);
1386                                 len = skb->len;
1387                                 napi_gro_receive(&card->napi, skb);
1388                         }
1389                         break;
1390                 case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
1391                         skb->protocol = eth_type_trans(skb, skb->dev);
1392                         len = skb->len;
1393                         netif_receive_skb(skb);
1394                         break;
1395                 default:
1396                         dev_kfree_skb_any(skb);
1397                         QETH_CARD_TEXT(card, 3, "inbunkno");
1398                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
1399                         continue;
1400                 }
1401                 work_done++;
1402                 budget--;
1403                 QETH_CARD_STAT_INC(card, rx_packets);
1404                 QETH_CARD_STAT_ADD(card, rx_bytes, len);
1405         }
1406         return work_done;
1407 }
1408
1409 static void qeth_l3_stop_card(struct qeth_card *card)
1410 {
1411         QETH_DBF_TEXT(SETUP, 2, "stopcard");
1412         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1413
1414         qeth_set_allowed_threads(card, 0, 1);
1415
1416         if (card->options.sniffer &&
1417             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1418                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1419
1420         if (card->state == CARD_STATE_SOFTSETUP) {
1421                 qeth_l3_clear_ip_htable(card, 1);
1422                 qeth_clear_ipacmd_list(card);
1423                 card->state = CARD_STATE_HARDSETUP;
1424         }
1425         if (card->state == CARD_STATE_HARDSETUP) {
1426                 qeth_qdio_clear_card(card, 0);
1427                 qeth_clear_qdio_buffers(card);
1428                 qeth_clear_working_pool_list(card);
1429                 card->state = CARD_STATE_DOWN;
1430         }
1431         if (card->state == CARD_STATE_DOWN) {
1432                 qeth_clear_cmd_buffers(&card->read);
1433                 qeth_clear_cmd_buffers(&card->write);
1434         }
1435
1436         flush_workqueue(card->event_wq);
1437 }
1438
1439 /*
1440  * test for and Switch promiscuous mode (on or off)
1441  *  either for guestlan or HiperSocket Sniffer
1442  */
1443 static void
1444 qeth_l3_handle_promisc_mode(struct qeth_card *card)
1445 {
1446         struct net_device *dev = card->dev;
1447
1448         if (((dev->flags & IFF_PROMISC) &&
1449              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
1450             (!(dev->flags & IFF_PROMISC) &&
1451              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
1452                 return;
1453
1454         if (card->info.guestlan) {              /* Guestlan trace */
1455                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1456                         qeth_setadp_promisc_mode(card);
1457         } else if (card->options.sniffer &&     /* HiperSockets trace */
1458                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1459                 if (dev->flags & IFF_PROMISC) {
1460                         QETH_CARD_TEXT(card, 3, "+promisc");
1461                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1462                 } else {
1463                         QETH_CARD_TEXT(card, 3, "-promisc");
1464                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1465                 }
1466         }
1467 }
1468
1469 static void qeth_l3_set_rx_mode(struct net_device *dev)
1470 {
1471         struct qeth_card *card = dev->ml_priv;
1472         struct qeth_ipaddr *addr;
1473         struct hlist_node *tmp;
1474         int i, rc;
1475
1476         QETH_CARD_TEXT(card, 3, "setmulti");
1477
1478         if (!card->options.sniffer) {
1479                 spin_lock_bh(&card->mclock);
1480
1481                 qeth_l3_add_multicast_ipv4(card);
1482                 qeth_l3_add_multicast_ipv6(card);
1483
1484                 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1485                         switch (addr->disp_flag) {
1486                         case QETH_DISP_ADDR_DELETE:
1487                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1488                                 if (!rc || rc == -ENOENT) {
1489                                         hash_del(&addr->hnode);
1490                                         kfree(addr);
1491                                 }
1492                                 break;
1493                         case QETH_DISP_ADDR_ADD:
1494                                 rc = qeth_l3_register_addr_entry(card, addr);
1495                                 if (rc && rc != -ENETDOWN) {
1496                                         hash_del(&addr->hnode);
1497                                         kfree(addr);
1498                                         break;
1499                                 }
1500                                 addr->ref_counter = 1;
1501                                 /* fall through */
1502                         default:
1503                                 /* for next call to set_rx_mode(): */
1504                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1505                         }
1506                 }
1507
1508                 spin_unlock_bh(&card->mclock);
1509
1510                 if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1511                         return;
1512         }
1513         qeth_l3_handle_promisc_mode(card);
1514 }
1515
1516 static int qeth_l3_arp_makerc(u16 rc)
1517 {
1518         switch (rc) {
1519         case IPA_RC_SUCCESS:
1520                 return 0;
1521         case QETH_IPA_ARP_RC_NOTSUPP:
1522         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1523                 return -EOPNOTSUPP;
1524         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1525                 return -EINVAL;
1526         case QETH_IPA_ARP_RC_Q_NO_DATA:
1527                 return -ENOENT;
1528         default:
1529                 return -EIO;
1530         }
1531 }
1532
1533 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1534                               unsigned long data)
1535 {
1536         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1537
1538         qeth_setassparms_cb(card, reply, data);
1539         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1540 }
1541
1542 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1543 {
1544         struct qeth_cmd_buffer *iob;
1545         int rc;
1546
1547         QETH_CARD_TEXT(card, 3, "arpstnoe");
1548
1549         /*
1550          * currently GuestLAN only supports the ARP assist function
1551          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1552          * thus we say EOPNOTSUPP for this ARP function
1553          */
1554         if (card->info.guestlan)
1555                 return -EOPNOTSUPP;
1556         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1557                 return -EOPNOTSUPP;
1558         }
1559
1560         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1561                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES, 4,
1562                                        QETH_PROT_IPV4);
1563         if (!iob)
1564                 return -ENOMEM;
1565
1566         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1567         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1568         if (rc)
1569                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1570                                  CARD_DEVID(card), rc);
1571         return rc;
1572 }
1573
1574 static __u32 get_arp_entry_size(struct qeth_card *card,
1575                         struct qeth_arp_query_data *qdata,
1576                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1577 {
1578         __u32 rc;
1579         __u8 is_hsi;
1580
1581         is_hsi = qdata->reply_bits == 5;
1582         if (type->ip == QETHARP_IP_ADDR_V4) {
1583                 QETH_CARD_TEXT(card, 4, "arpev4");
1584                 if (strip_entries) {
1585                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1586                                 sizeof(struct qeth_arp_qi_entry7_short);
1587                 } else {
1588                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1589                                 sizeof(struct qeth_arp_qi_entry7);
1590                 }
1591         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1592                 QETH_CARD_TEXT(card, 4, "arpev6");
1593                 if (strip_entries) {
1594                         rc = is_hsi ?
1595                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1596                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1597                 } else {
1598                         rc = is_hsi ?
1599                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1600                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1601                 }
1602         } else {
1603                 QETH_CARD_TEXT(card, 4, "arpinv");
1604                 rc = 0;
1605         }
1606
1607         return rc;
1608 }
1609
1610 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1611 {
1612         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1613                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1614 }
1615
1616 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1617                 struct qeth_reply *reply, unsigned long data)
1618 {
1619         struct qeth_ipa_cmd *cmd;
1620         struct qeth_arp_query_data *qdata;
1621         struct qeth_arp_query_info *qinfo;
1622         int e;
1623         int entrybytes_done;
1624         int stripped_bytes;
1625         __u8 do_strip_entries;
1626
1627         QETH_CARD_TEXT(card, 3, "arpquecb");
1628
1629         qinfo = (struct qeth_arp_query_info *) reply->param;
1630         cmd = (struct qeth_ipa_cmd *) data;
1631         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1632         if (cmd->hdr.return_code) {
1633                 QETH_CARD_TEXT(card, 4, "arpcberr");
1634                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1635                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1636         }
1637         if (cmd->data.setassparms.hdr.return_code) {
1638                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1639                 QETH_CARD_TEXT(card, 4, "setaperr");
1640                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1641                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1642         }
1643         qdata = &cmd->data.setassparms.data.query_arp;
1644         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1645
1646         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1647         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1648         entrybytes_done = 0;
1649         for (e = 0; e < qdata->no_entries; ++e) {
1650                 char *cur_entry;
1651                 __u32 esize;
1652                 struct qeth_arp_entrytype *etype;
1653
1654                 cur_entry = &qdata->data + entrybytes_done;
1655                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1656                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1657                         QETH_CARD_TEXT(card, 4, "pmis");
1658                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1659                         break;
1660                 }
1661                 esize = get_arp_entry_size(card, qdata, etype,
1662                         do_strip_entries);
1663                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1664                 if (!esize)
1665                         break;
1666
1667                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1668                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1669                         memset(qinfo->udata, 0, 4);
1670                         return -ENOSPC;
1671                 }
1672
1673                 memcpy(qinfo->udata + qinfo->udata_offset,
1674                         &qdata->data + entrybytes_done + stripped_bytes,
1675                         esize);
1676                 entrybytes_done += esize + stripped_bytes;
1677                 qinfo->udata_offset += esize;
1678                 ++qinfo->no_entries;
1679         }
1680         /* check if all replies received ... */
1681         if (cmd->data.setassparms.hdr.seq_no <
1682             cmd->data.setassparms.hdr.number_of_replies)
1683                 return 1;
1684         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1685         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1686         /* keep STRIP_ENTRIES flag so the user program can distinguish
1687          * stripped entries from normal ones */
1688         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1689                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1690         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1691         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1692         return 0;
1693 }
1694
1695 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1696         enum qeth_prot_versions prot,
1697         struct qeth_arp_query_info *qinfo)
1698 {
1699         struct qeth_cmd_buffer *iob;
1700         struct qeth_ipa_cmd *cmd;
1701         int rc;
1702
1703         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1704
1705         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1706                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1707                                        sizeof(struct qeth_arp_query_data)
1708                                                 - sizeof(char),
1709                                        prot);
1710         if (!iob)
1711                 return -ENOMEM;
1712         cmd = __ipa_cmd(iob);
1713         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1714         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1715         if (rc)
1716                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1717                                  CARD_DEVID(card), rc);
1718         return rc;
1719 }
1720
1721 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1722 {
1723         struct qeth_arp_query_info qinfo = {0, };
1724         int rc;
1725
1726         QETH_CARD_TEXT(card, 3, "arpquery");
1727
1728         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1729                                IPA_ARP_PROCESSING)) {
1730                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1731                 rc = -EOPNOTSUPP;
1732                 goto out;
1733         }
1734         /* get size of userspace buffer and mask_bits -> 6 bytes */
1735         if (copy_from_user(&qinfo, udata, 6)) {
1736                 rc = -EFAULT;
1737                 goto out;
1738         }
1739         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1740         if (!qinfo.udata) {
1741                 rc = -ENOMEM;
1742                 goto out;
1743         }
1744         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1745         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1746         if (rc) {
1747                 if (copy_to_user(udata, qinfo.udata, 4))
1748                         rc = -EFAULT;
1749                 goto free_and_out;
1750         }
1751         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1752                 /* fails in case of GuestLAN QDIO mode */
1753                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1754         }
1755         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1756                 QETH_CARD_TEXT(card, 4, "qactf");
1757                 rc = -EFAULT;
1758                 goto free_and_out;
1759         }
1760         QETH_CARD_TEXT(card, 4, "qacts");
1761
1762 free_and_out:
1763         kfree(qinfo.udata);
1764 out:
1765         return rc;
1766 }
1767
1768 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1769                                     struct qeth_arp_cache_entry *entry,
1770                                     enum qeth_arp_process_subcmds arp_cmd)
1771 {
1772         struct qeth_arp_cache_entry *cmd_entry;
1773         struct qeth_cmd_buffer *iob;
1774         int rc;
1775
1776         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1777                 QETH_CARD_TEXT(card, 3, "arpadd");
1778         else
1779                 QETH_CARD_TEXT(card, 3, "arpdel");
1780
1781         /*
1782          * currently GuestLAN only supports the ARP assist function
1783          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1784          * thus we say EOPNOTSUPP for this ARP function
1785          */
1786         if (card->info.guestlan)
1787                 return -EOPNOTSUPP;
1788         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1789                 return -EOPNOTSUPP;
1790         }
1791
1792         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1793                                        sizeof(*cmd_entry), QETH_PROT_IPV4);
1794         if (!iob)
1795                 return -ENOMEM;
1796
1797         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1798         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1799         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1800         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1801         if (rc)
1802                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1803                                  arp_cmd, CARD_DEVID(card), rc);
1804         return rc;
1805 }
1806
1807 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1808 {
1809         struct qeth_cmd_buffer *iob;
1810         int rc;
1811
1812         QETH_CARD_TEXT(card, 3, "arpflush");
1813
1814         /*
1815          * currently GuestLAN only supports the ARP assist function
1816          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1817          * thus we say EOPNOTSUPP for this ARP function
1818         */
1819         if (card->info.guestlan || (card->info.type == QETH_CARD_TYPE_IQD))
1820                 return -EOPNOTSUPP;
1821         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1822                 return -EOPNOTSUPP;
1823         }
1824
1825         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1826                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1827                                        QETH_PROT_IPV4);
1828         if (!iob)
1829                 return -ENOMEM;
1830
1831         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1832         if (rc)
1833                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1834                                  CARD_DEVID(card), rc);
1835         return rc;
1836 }
1837
1838 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1839 {
1840         struct qeth_card *card = dev->ml_priv;
1841         struct qeth_arp_cache_entry arp_entry;
1842         enum qeth_arp_process_subcmds arp_cmd;
1843         int rc = 0;
1844
1845         switch (cmd) {
1846         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1847                 if (!capable(CAP_NET_ADMIN)) {
1848                         rc = -EPERM;
1849                         break;
1850                 }
1851                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1852                 break;
1853         case SIOC_QETH_ARP_QUERY_INFO:
1854                 if (!capable(CAP_NET_ADMIN)) {
1855                         rc = -EPERM;
1856                         break;
1857                 }
1858                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1859                 break;
1860         case SIOC_QETH_ARP_ADD_ENTRY:
1861         case SIOC_QETH_ARP_REMOVE_ENTRY:
1862                 if (!capable(CAP_NET_ADMIN))
1863                         return -EPERM;
1864                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1865                         return -EFAULT;
1866
1867                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1868                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1869                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1870                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1871         case SIOC_QETH_ARP_FLUSH_CACHE:
1872                 if (!capable(CAP_NET_ADMIN)) {
1873                         rc = -EPERM;
1874                         break;
1875                 }
1876                 rc = qeth_l3_arp_flush_cache(card);
1877                 break;
1878         default:
1879                 rc = -EOPNOTSUPP;
1880         }
1881         return rc;
1882 }
1883
1884 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1885 {
1886         struct neighbour *n = NULL;
1887         struct dst_entry *dst;
1888
1889         rcu_read_lock();
1890         dst = skb_dst(skb);
1891         if (dst)
1892                 n = dst_neigh_lookup_skb(dst, skb);
1893         if (n) {
1894                 int cast_type = n->type;
1895
1896                 rcu_read_unlock();
1897                 neigh_release(n);
1898                 if ((cast_type == RTN_BROADCAST) ||
1899                     (cast_type == RTN_MULTICAST) ||
1900                     (cast_type == RTN_ANYCAST))
1901                         return cast_type;
1902                 return RTN_UNICAST;
1903         }
1904         rcu_read_unlock();
1905
1906         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1907         switch (qeth_get_ip_version(skb)) {
1908         case 4:
1909                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1910                                 RTN_MULTICAST : RTN_UNICAST;
1911         case 6:
1912                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1913                                 RTN_MULTICAST : RTN_UNICAST;
1914         default:
1915                 /* ... and MAC address */
1916                 if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
1917                                             skb->dev->broadcast))
1918                         return RTN_BROADCAST;
1919                 if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1920                         return RTN_MULTICAST;
1921                 /* default to unicast */
1922                 return RTN_UNICAST;
1923         }
1924 }
1925
1926 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1927 {
1928         if (cast_type == RTN_MULTICAST)
1929                 return QETH_CAST_MULTICAST;
1930         if (cast_type == RTN_ANYCAST)
1931                 return QETH_CAST_ANYCAST;
1932         if (cast_type == RTN_BROADCAST)
1933                 return QETH_CAST_BROADCAST;
1934         return QETH_CAST_UNICAST;
1935 }
1936
1937 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1938                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1939                                 int ipv, int cast_type, unsigned int data_len)
1940 {
1941         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1942         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1943         struct qeth_card *card = queue->card;
1944
1945         hdr->hdr.l3.length = data_len;
1946
1947         if (skb_is_gso(skb)) {
1948                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1949         } else {
1950                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1951
1952                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1953                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1954                         l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
1955                         memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
1956                                iucv_trans_hdr(skb)->destUserID, 8);
1957                         return;
1958                 }
1959
1960                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1961                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1962                         /* some HW requires combined L3+L4 csum offload: */
1963                         if (ipv == 4)
1964                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1965                         QETH_TXQ_STAT_INC(queue, skbs_csum);
1966                 }
1967         }
1968
1969         if (ipv == 4 || IS_IQD(card)) {
1970                 /* NETIF_F_HW_VLAN_CTAG_TX */
1971                 if (skb_vlan_tag_present(skb)) {
1972                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1973                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1974                 }
1975         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1976                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1977                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1978         }
1979
1980         /* OSA only: */
1981         if (!ipv) {
1982                 hdr->hdr.l3.flags = QETH_HDR_PASSTHRU;
1983                 if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
1984                                             skb->dev->broadcast))
1985                         hdr->hdr.l3.flags |= QETH_CAST_BROADCAST;
1986                 else
1987                         hdr->hdr.l3.flags |= (cast_type == RTN_MULTICAST) ?
1988                                 QETH_CAST_MULTICAST : QETH_CAST_UNICAST;
1989                 return;
1990         }
1991
1992         hdr->hdr.l3.flags = qeth_l3_cast_type_to_flag(cast_type);
1993         rcu_read_lock();
1994         if (ipv == 4) {
1995                 struct rtable *rt = skb_rtable(skb);
1996
1997                 *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
1998                                 rt_nexthop(rt, ip_hdr(skb)->daddr) :
1999                                 ip_hdr(skb)->daddr;
2000         } else {
2001                 /* IPv6 */
2002                 const struct rt6_info *rt = skb_rt6_info(skb);
2003
2004                 if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
2005                         l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
2006                 else
2007                         l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
2008
2009                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
2010                 if (card->info.type != QETH_CARD_TYPE_IQD)
2011                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
2012         }
2013         rcu_read_unlock();
2014 }
2015
2016 static void qeth_l3_fixup_headers(struct sk_buff *skb)
2017 {
2018         struct iphdr *iph = ip_hdr(skb);
2019
2020         /* this is safe, IPv6 traffic takes a different path */
2021         if (skb->ip_summed == CHECKSUM_PARTIAL)
2022                 iph->check = 0;
2023         if (skb_is_gso(skb)) {
2024                 iph->tot_len = 0;
2025                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
2026                                                     iph->daddr, 0);
2027         }
2028 }
2029
2030 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
2031                         struct qeth_qdio_out_q *queue, int ipv, int cast_type)
2032 {
2033         unsigned char eth_hdr[ETH_HLEN];
2034         unsigned int hw_hdr_len;
2035         int rc;
2036
2037         /* re-use the L2 header area for the HW header: */
2038         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
2039                                        sizeof(struct qeth_hdr);
2040         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
2041         if (rc)
2042                 return rc;
2043         skb_copy_from_linear_data(skb, eth_hdr, ETH_HLEN);
2044         skb_pull(skb, ETH_HLEN);
2045
2046         qeth_l3_fixup_headers(skb);
2047         rc = qeth_xmit(card, skb, queue, ipv, cast_type, qeth_l3_fill_header);
2048         if (rc == -EBUSY) {
2049                 /* roll back to ETH header */
2050                 skb_push(skb, ETH_HLEN);
2051                 skb_copy_to_linear_data(skb, eth_hdr, ETH_HLEN);
2052         }
2053         return rc;
2054 }
2055
2056 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
2057                                            struct net_device *dev)
2058 {
2059         int cast_type = qeth_l3_get_cast_type(skb);
2060         struct qeth_card *card = dev->ml_priv;
2061         int ipv = qeth_get_ip_version(skb);
2062         struct qeth_qdio_out_q *queue;
2063         int tx_bytes = skb->len;
2064         int rc;
2065
2066         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
2067
2068         if (IS_IQD(card)) {
2069                 if (card->options.sniffer)
2070                         goto tx_drop;
2071                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
2072                     (card->options.cq == QETH_CQ_ENABLED &&
2073                      skb->protocol != htons(ETH_P_AF_IUCV)))
2074                         goto tx_drop;
2075         }
2076
2077         if (cast_type == RTN_BROADCAST && !card->info.broadcast_capable)
2078                 goto tx_drop;
2079
2080         netif_stop_queue(dev);
2081
2082         if (ipv == 4 || IS_IQD(card))
2083                 rc = qeth_l3_xmit(card, skb, queue, ipv, cast_type);
2084         else
2085                 rc = qeth_xmit(card, skb, queue, ipv, cast_type,
2086                                qeth_l3_fill_header);
2087
2088         if (!rc) {
2089                 QETH_TXQ_STAT_INC(queue, tx_packets);
2090                 QETH_TXQ_STAT_ADD(queue, tx_bytes, tx_bytes);
2091                 netif_wake_queue(dev);
2092                 return NETDEV_TX_OK;
2093         } else if (rc == -EBUSY) {
2094                 return NETDEV_TX_BUSY;
2095         } /* else fall through */
2096
2097 tx_drop:
2098         QETH_TXQ_STAT_INC(queue, tx_dropped);
2099         kfree_skb(skb);
2100         netif_wake_queue(dev);
2101         return NETDEV_TX_OK;
2102 }
2103
2104 /*
2105  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
2106  * NOARP on the netdevice is no option because it also turns off neighbor
2107  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
2108  * arp resolution but we want the hard header (packet socket will work
2109  * e.g. tcpdump)
2110  */
2111 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
2112 {
2113         n->nud_state = NUD_NOARP;
2114         memcpy(n->ha, "FAKELL", 6);
2115         n->output = n->ops->connected_output;
2116         return 0;
2117 }
2118
2119 static int
2120 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
2121 {
2122         if (np->tbl->family == AF_INET)
2123                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
2124
2125         return 0;
2126 }
2127
2128 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
2129                                                     struct net_device *dev,
2130                                                     netdev_features_t features)
2131 {
2132         if (qeth_get_ip_version(skb) != 4)
2133                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2134         return qeth_features_check(skb, dev, features);
2135 }
2136
2137 static const struct net_device_ops qeth_l3_netdev_ops = {
2138         .ndo_open               = qeth_open,
2139         .ndo_stop               = qeth_stop,
2140         .ndo_get_stats64        = qeth_get_stats64,
2141         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2142         .ndo_validate_addr      = eth_validate_addr,
2143         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2144         .ndo_do_ioctl           = qeth_do_ioctl,
2145         .ndo_fix_features       = qeth_fix_features,
2146         .ndo_set_features       = qeth_set_features,
2147         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2148         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2149         .ndo_tx_timeout         = qeth_tx_timeout,
2150 };
2151
2152 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
2153         .ndo_open               = qeth_open,
2154         .ndo_stop               = qeth_stop,
2155         .ndo_get_stats64        = qeth_get_stats64,
2156         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2157         .ndo_features_check     = qeth_l3_osa_features_check,
2158         .ndo_validate_addr      = eth_validate_addr,
2159         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2160         .ndo_do_ioctl           = qeth_do_ioctl,
2161         .ndo_fix_features       = qeth_fix_features,
2162         .ndo_set_features       = qeth_set_features,
2163         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2164         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2165         .ndo_tx_timeout         = qeth_tx_timeout,
2166         .ndo_neigh_setup        = qeth_l3_neigh_setup,
2167 };
2168
2169 static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
2170 {
2171         unsigned int headroom;
2172         int rc;
2173
2174         if (card->info.type == QETH_CARD_TYPE_OSD ||
2175             card->info.type == QETH_CARD_TYPE_OSX) {
2176                 if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
2177                     (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
2178                         pr_info("qeth_l3: ignoring TR device\n");
2179                         return -ENODEV;
2180                 }
2181
2182                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
2183
2184                 /*IPv6 address autoconfiguration stuff*/
2185                 qeth_l3_get_unique_id(card);
2186                 if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
2187                         card->dev->dev_id = card->info.unique_id & 0xffff;
2188
2189                 if (!card->info.guestlan) {
2190                         card->dev->features |= NETIF_F_SG;
2191                         card->dev->hw_features |= NETIF_F_TSO |
2192                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2193                         card->dev->vlan_features |= NETIF_F_TSO |
2194                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2195                 }
2196
2197                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
2198                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
2199                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
2200                 }
2201                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
2202                         card->dev->hw_features |= NETIF_F_TSO6;
2203                         card->dev->vlan_features |= NETIF_F_TSO6;
2204                 }
2205
2206                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
2207                 if (card->dev->hw_features & NETIF_F_TSO6)
2208                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
2209                 else if (card->dev->hw_features & NETIF_F_TSO)
2210                         headroom = sizeof(struct qeth_hdr_tso);
2211                 else
2212                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
2213         } else if (card->info.type == QETH_CARD_TYPE_IQD) {
2214                 card->dev->flags |= IFF_NOARP;
2215                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
2216                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
2217
2218                 rc = qeth_l3_iqd_read_initial_mac(card);
2219                 if (rc)
2220                         goto out;
2221         } else
2222                 return -ENODEV;
2223
2224         card->dev->needed_headroom = headroom;
2225         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
2226                                 NETIF_F_HW_VLAN_CTAG_RX |
2227                                 NETIF_F_HW_VLAN_CTAG_FILTER;
2228
2229         netif_keep_dst(card->dev);
2230         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
2231                 netif_set_gso_max_size(card->dev,
2232                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
2233
2234         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
2235         rc = register_netdev(card->dev);
2236         if (!rc && carrier_ok)
2237                 netif_carrier_on(card->dev);
2238
2239 out:
2240         if (rc)
2241                 card->dev->netdev_ops = NULL;
2242         return rc;
2243 }
2244
2245 static const struct device_type qeth_l3_devtype = {
2246         .name = "qeth_layer3",
2247         .groups = qeth_l3_attr_groups,
2248 };
2249
2250 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
2251 {
2252         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2253         int rc;
2254
2255         hash_init(card->ip_htable);
2256
2257         if (gdev->dev.type == &qeth_generic_devtype) {
2258                 rc = qeth_l3_create_device_attributes(&gdev->dev);
2259                 if (rc)
2260                         return rc;
2261         }
2262
2263         hash_init(card->ip_mc_htable);
2264         return 0;
2265 }
2266
2267 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2268 {
2269         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2270
2271         if (cgdev->dev.type == &qeth_generic_devtype)
2272                 qeth_l3_remove_device_attributes(&cgdev->dev);
2273
2274         qeth_set_allowed_threads(card, 0, 1);
2275         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2276
2277         if (cgdev->state == CCWGROUP_ONLINE)
2278                 qeth_l3_set_offline(cgdev);
2279
2280         cancel_work_sync(&card->close_dev_work);
2281         if (qeth_netdev_is_registered(card->dev))
2282                 unregister_netdev(card->dev);
2283         qeth_l3_clear_ip_htable(card, 0);
2284         qeth_l3_clear_ipato_list(card);
2285 }
2286
2287 static int qeth_l3_set_online(struct ccwgroup_device *gdev)
2288 {
2289         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2290         struct net_device *dev = card->dev;
2291         int rc = 0;
2292         bool carrier_ok;
2293
2294         mutex_lock(&card->discipline_mutex);
2295         mutex_lock(&card->conf_mutex);
2296         QETH_DBF_TEXT(SETUP, 2, "setonlin");
2297         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
2298
2299         rc = qeth_core_hardsetup_card(card, &carrier_ok);
2300         if (rc) {
2301                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
2302                 rc = -ENODEV;
2303                 goto out_remove;
2304         }
2305
2306         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
2307                 if (card->info.hwtrap &&
2308                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
2309                         card->info.hwtrap = 0;
2310         } else
2311                 card->info.hwtrap = 0;
2312
2313         card->state = CARD_STATE_HARDSETUP;
2314         qeth_print_status_message(card);
2315
2316         /* softsetup */
2317         QETH_DBF_TEXT(SETUP, 2, "softsetp");
2318
2319         rc = qeth_l3_setadapter_parms(card);
2320         if (rc)
2321                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
2322         if (!card->options.sniffer) {
2323                 rc = qeth_l3_start_ipassists(card);
2324                 if (rc) {
2325                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2326                         goto out_remove;
2327                 }
2328                 rc = qeth_l3_setrouting_v4(card);
2329                 if (rc)
2330                         QETH_DBF_TEXT_(SETUP, 2, "4err%04x", rc);
2331                 rc = qeth_l3_setrouting_v6(card);
2332                 if (rc)
2333                         QETH_DBF_TEXT_(SETUP, 2, "5err%04x", rc);
2334         }
2335
2336         rc = qeth_init_qdio_queues(card);
2337         if (rc) {
2338                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2339                 rc = -ENODEV;
2340                 goto out_remove;
2341         }
2342         card->state = CARD_STATE_SOFTSETUP;
2343
2344         qeth_set_allowed_threads(card, 0xffffffff, 0);
2345         qeth_l3_recover_ip(card);
2346
2347         if (!qeth_netdev_is_registered(dev)) {
2348                 rc = qeth_l3_setup_netdev(card, carrier_ok);
2349                 if (rc)
2350                         goto out_remove;
2351         } else {
2352                 rtnl_lock();
2353                 if (carrier_ok)
2354                         netif_carrier_on(dev);
2355                 else
2356                         netif_carrier_off(dev);
2357
2358                 netif_device_attach(dev);
2359                 qeth_enable_hw_features(dev);
2360
2361                 if (card->info.open_when_online) {
2362                         card->info.open_when_online = 0;
2363                         dev_open(dev, NULL);
2364                 }
2365                 rtnl_unlock();
2366         }
2367         qeth_trace_features(card);
2368         /* let user_space know that device is online */
2369         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2370         mutex_unlock(&card->conf_mutex);
2371         mutex_unlock(&card->discipline_mutex);
2372         return 0;
2373 out_remove:
2374         qeth_l3_stop_card(card);
2375         ccw_device_set_offline(CARD_DDEV(card));
2376         ccw_device_set_offline(CARD_WDEV(card));
2377         ccw_device_set_offline(CARD_RDEV(card));
2378         qdio_free(CARD_DDEV(card));
2379         card->state = CARD_STATE_DOWN;
2380
2381         mutex_unlock(&card->conf_mutex);
2382         mutex_unlock(&card->discipline_mutex);
2383         return rc;
2384 }
2385
2386 static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
2387                         int recovery_mode)
2388 {
2389         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2390         int rc = 0, rc2 = 0, rc3 = 0;
2391
2392         mutex_lock(&card->discipline_mutex);
2393         mutex_lock(&card->conf_mutex);
2394         QETH_DBF_TEXT(SETUP, 3, "setoffl");
2395         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
2396
2397         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
2398                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2399                 card->info.hwtrap = 1;
2400         }
2401
2402         rtnl_lock();
2403         card->info.open_when_online = card->dev->flags & IFF_UP;
2404         dev_close(card->dev);
2405         netif_device_detach(card->dev);
2406         netif_carrier_off(card->dev);
2407         rtnl_unlock();
2408
2409         qeth_l3_stop_card(card);
2410         if (card->options.cq == QETH_CQ_ENABLED) {
2411                 rtnl_lock();
2412                 call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
2413                 rtnl_unlock();
2414         }
2415         rc  = ccw_device_set_offline(CARD_DDEV(card));
2416         rc2 = ccw_device_set_offline(CARD_WDEV(card));
2417         rc3 = ccw_device_set_offline(CARD_RDEV(card));
2418         if (!rc)
2419                 rc = (rc2) ? rc2 : rc3;
2420         if (rc)
2421                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2422         qdio_free(CARD_DDEV(card));
2423
2424         /* let user_space know that device is offline */
2425         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
2426         mutex_unlock(&card->conf_mutex);
2427         mutex_unlock(&card->discipline_mutex);
2428         return 0;
2429 }
2430
2431 static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
2432 {
2433         return __qeth_l3_set_offline(cgdev, 0);
2434 }
2435
2436 static int qeth_l3_recover(void *ptr)
2437 {
2438         struct qeth_card *card;
2439         int rc = 0;
2440
2441         card = (struct qeth_card *) ptr;
2442         QETH_CARD_TEXT(card, 2, "recover1");
2443         QETH_CARD_HEX(card, 2, &card, sizeof(void *));
2444         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
2445                 return 0;
2446         QETH_CARD_TEXT(card, 2, "recover2");
2447         dev_warn(&card->gdev->dev,
2448                 "A recovery process has been started for the device\n");
2449         __qeth_l3_set_offline(card->gdev, 1);
2450         rc = qeth_l3_set_online(card->gdev);
2451         if (!rc)
2452                 dev_info(&card->gdev->dev,
2453                         "Device successfully recovered!\n");
2454         else {
2455                 ccwgroup_set_offline(card->gdev);
2456                 dev_warn(&card->gdev->dev, "The qeth device driver "
2457                                 "failed to recover an error on the device\n");
2458         }
2459         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
2460         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
2461         return 0;
2462 }
2463
2464 static int qeth_l3_pm_suspend(struct ccwgroup_device *gdev)
2465 {
2466         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2467
2468         qeth_set_allowed_threads(card, 0, 1);
2469         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2470         if (gdev->state == CCWGROUP_OFFLINE)
2471                 return 0;
2472
2473         qeth_l3_set_offline(gdev);
2474         return 0;
2475 }
2476
2477 static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
2478 {
2479         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2480         int rc;
2481
2482         rc = qeth_l3_set_online(gdev);
2483
2484         qeth_set_allowed_threads(card, 0xffffffff, 0);
2485         if (rc)
2486                 dev_warn(&card->gdev->dev, "The qeth device driver "
2487                         "failed to recover an error on the device\n");
2488         return rc;
2489 }
2490
2491 /* Returns zero if the command is successfully "consumed" */
2492 static int qeth_l3_control_event(struct qeth_card *card,
2493                                         struct qeth_ipa_cmd *cmd)
2494 {
2495         return 1;
2496 }
2497
2498 struct qeth_discipline qeth_l3_discipline = {
2499         .devtype = &qeth_l3_devtype,
2500         .process_rx_buffer = qeth_l3_process_inbound_buffer,
2501         .recover = qeth_l3_recover,
2502         .setup = qeth_l3_probe_device,
2503         .remove = qeth_l3_remove_device,
2504         .set_online = qeth_l3_set_online,
2505         .set_offline = qeth_l3_set_offline,
2506         .freeze = qeth_l3_pm_suspend,
2507         .thaw = qeth_l3_pm_resume,
2508         .restore = qeth_l3_pm_resume,
2509         .do_ioctl = qeth_l3_do_ioctl,
2510         .control_event_handler = qeth_l3_control_event,
2511 };
2512 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2513
2514 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2515                                    struct qeth_ipaddr *addr,
2516                                    unsigned long event)
2517 {
2518         switch (event) {
2519         case NETDEV_UP:
2520                 spin_lock_bh(&card->ip_lock);
2521                 qeth_l3_add_ip(card, addr);
2522                 spin_unlock_bh(&card->ip_lock);
2523                 return NOTIFY_OK;
2524         case NETDEV_DOWN:
2525                 spin_lock_bh(&card->ip_lock);
2526                 qeth_l3_delete_ip(card, addr);
2527                 spin_unlock_bh(&card->ip_lock);
2528                 return NOTIFY_OK;
2529         default:
2530                 return NOTIFY_DONE;
2531         }
2532 }
2533
2534 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2535 {
2536         if (is_vlan_dev(dev))
2537                 dev = vlan_dev_real_dev(dev);
2538         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2539             dev->netdev_ops == &qeth_l3_netdev_ops)
2540                 return (struct qeth_card *) dev->ml_priv;
2541         return NULL;
2542 }
2543
2544 static int qeth_l3_ip_event(struct notifier_block *this,
2545                             unsigned long event, void *ptr)
2546 {
2547
2548         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2549         struct net_device *dev = ifa->ifa_dev->dev;
2550         struct qeth_ipaddr addr;
2551         struct qeth_card *card;
2552
2553         if (dev_net(dev) != &init_net)
2554                 return NOTIFY_DONE;
2555
2556         card = qeth_l3_get_card_from_dev(dev);
2557         if (!card)
2558                 return NOTIFY_DONE;
2559         QETH_CARD_TEXT(card, 3, "ipevent");
2560
2561         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2562         addr.u.a4.addr = be32_to_cpu(ifa->ifa_address);
2563         addr.u.a4.mask = be32_to_cpu(ifa->ifa_mask);
2564
2565         return qeth_l3_handle_ip_event(card, &addr, event);
2566 }
2567
2568 static struct notifier_block qeth_l3_ip_notifier = {
2569         qeth_l3_ip_event,
2570         NULL,
2571 };
2572
2573 static int qeth_l3_ip6_event(struct notifier_block *this,
2574                              unsigned long event, void *ptr)
2575 {
2576         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2577         struct net_device *dev = ifa->idev->dev;
2578         struct qeth_ipaddr addr;
2579         struct qeth_card *card;
2580
2581         card = qeth_l3_get_card_from_dev(dev);
2582         if (!card)
2583                 return NOTIFY_DONE;
2584         QETH_CARD_TEXT(card, 3, "ip6event");
2585         if (!qeth_is_supported(card, IPA_IPV6))
2586                 return NOTIFY_DONE;
2587
2588         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
2589         addr.u.a6.addr = ifa->addr;
2590         addr.u.a6.pfxlen = ifa->prefix_len;
2591
2592         return qeth_l3_handle_ip_event(card, &addr, event);
2593 }
2594
2595 static struct notifier_block qeth_l3_ip6_notifier = {
2596         qeth_l3_ip6_event,
2597         NULL,
2598 };
2599
2600 static int qeth_l3_register_notifiers(void)
2601 {
2602         int rc;
2603
2604         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2605         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2606         if (rc)
2607                 return rc;
2608         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2609         if (rc) {
2610                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2611                 return rc;
2612         }
2613         return 0;
2614 }
2615
2616 static void qeth_l3_unregister_notifiers(void)
2617 {
2618         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2619         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2620         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2621 }
2622
2623 static int __init qeth_l3_init(void)
2624 {
2625         pr_info("register layer 3 discipline\n");
2626         return qeth_l3_register_notifiers();
2627 }
2628
2629 static void __exit qeth_l3_exit(void)
2630 {
2631         qeth_l3_unregister_notifiers();
2632         pr_info("unregister layer 3 discipline\n");
2633 }
2634
2635 module_init(qeth_l3_init);
2636 module_exit(qeth_l3_exit);
2637 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2638 MODULE_DESCRIPTION("qeth layer 3 discipline");
2639 MODULE_LICENSE("GPL");