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/inet.h>
  23#include <linux/ipv6.h>
  24#include <linux/inetdevice.h>
  25#include <linux/igmp.h>
  26#include <linux/slab.h>
  27#include <linux/if_ether.h>
  28#include <linux/if_vlan.h>
  29#include <linux/skbuff.h>
  30
  31#include <net/ip.h>
  32#include <net/arp.h>
  33#include <net/route.h>
  34#include <net/ipv6.h>
  35#include <net/ip6_route.h>
  36#include <net/iucv/af_iucv.h>
  37#include <linux/hashtable.h>
  38
  39#include "qeth_l3.h"
  40
  41static int qeth_l3_register_addr_entry(struct qeth_card *,
  42		struct qeth_ipaddr *);
  43static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  44		struct qeth_ipaddr *);
  45
  46int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
  47			     char *buf)
  48{
  49	if (proto == QETH_PROT_IPV4)
  50		return scnprintf(buf, INET_ADDRSTRLEN, "%pI4", addr);
  51	else
  52		return scnprintf(buf, INET6_ADDRSTRLEN, "%pI6", addr);
  53}
  54
  55static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  56						   struct qeth_ipaddr *query)
  57{
  58	u32 key = qeth_l3_ipaddr_hash(query);
  59	struct qeth_ipaddr *addr;
  60
  61	if (query->is_multicast) {
  62		hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
  63			if (qeth_l3_addr_match_ip(addr, query))
  64				return addr;
  65	} else {
  66		hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  67			if (qeth_l3_addr_match_ip(addr, query))
  68				return addr;
  69	}
  70	return NULL;
  71}
  72
  73static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  74{
  75	int i, j;
  76	u8 octet;
  77
  78	for (i = 0; i < len; ++i) {
  79		octet = addr[i];
  80		for (j = 7; j >= 0; --j) {
  81			bits[i*8 + j] = octet & 1;
  82			octet >>= 1;
  83		}
  84	}
  85}
  86
  87static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
  88					     struct qeth_ipaddr *addr)
  89{
  90	struct qeth_ipato_entry *ipatoe;
  91	u8 addr_bits[128] = {0, };
  92	u8 ipatoe_bits[128] = {0, };
  93	int rc = 0;
  94
  95	if (!card->ipato.enabled)
  96		return false;
  97	if (addr->type != QETH_IP_TYPE_NORMAL)
  98		return false;
  99
 100	qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 101				     (addr->proto == QETH_PROT_IPV4) ? 4 : 16);
 102	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 103		if (addr->proto != ipatoe->proto)
 104			continue;
 105		qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 106					  (ipatoe->proto == QETH_PROT_IPV4) ?
 107					  4 : 16);
 108		rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
 109		if (rc)
 110			break;
 111	}
 112	/* invert? */
 113	if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 114		rc = !rc;
 115	else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 116		rc = !rc;
 117
 118	return rc;
 119}
 120
 121static int qeth_l3_delete_ip(struct qeth_card *card,
 122			     struct qeth_ipaddr *tmp_addr)
 123{
 124	int rc = 0;
 125	struct qeth_ipaddr *addr;
 126
 127	if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 128		QETH_CARD_TEXT(card, 2, "delrxip");
 129	else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 130		QETH_CARD_TEXT(card, 2, "delvipa");
 131	else
 132		QETH_CARD_TEXT(card, 2, "delip");
 133
 134	if (tmp_addr->proto == QETH_PROT_IPV4)
 135		QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 136	else {
 137		QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 138		QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 139	}
 140
 141	addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 142	if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 143		return -ENOENT;
 144
 145	addr->ref_counter--;
 146	if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 147		return rc;
 148
 149	if (qeth_card_hw_is_reachable(card))
 150		rc = qeth_l3_deregister_addr_entry(card, addr);
 151
 152	hash_del(&addr->hnode);
 153	kfree(addr);
 154
 155	return rc;
 156}
 157
 158static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 159{
 160	int rc = 0;
 161	struct qeth_ipaddr *addr;
 162	char buf[INET6_ADDRSTRLEN];
 163
 164	if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 165		QETH_CARD_TEXT(card, 2, "addrxip");
 166	else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 167		QETH_CARD_TEXT(card, 2, "addvipa");
 168	else
 169		QETH_CARD_TEXT(card, 2, "addip");
 170
 171	if (tmp_addr->proto == QETH_PROT_IPV4)
 172		QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 173	else {
 174		QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 175		QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 176	}
 177
 178	addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 179	if (addr) {
 180		if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 181			return -EADDRINUSE;
 182		if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 183			addr->ref_counter++;
 184			return 0;
 185		}
 186		qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 187					 buf);
 188		dev_warn(&card->gdev->dev,
 189			 "Registering IP address %s failed\n", buf);
 190		return -EADDRINUSE;
 191	} else {
 192		addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 193		if (!addr)
 194			return -ENOMEM;
 195
 196		if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 197			QETH_CARD_TEXT(card, 2, "tkovaddr");
 198			addr->ipato = 1;
 199		}
 200		hash_add(card->ip_htable, &addr->hnode,
 201				qeth_l3_ipaddr_hash(addr));
 202
 203		if (!qeth_card_hw_is_reachable(card)) {
 204			addr->disp_flag = QETH_DISP_ADDR_ADD;
 205			return 0;
 206		}
 207
 208		rc = qeth_l3_register_addr_entry(card, addr);
 209
 210		if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 211			addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 212		} else {
 213			hash_del(&addr->hnode);
 214			kfree(addr);
 215		}
 216	}
 217	return rc;
 218}
 219
 220static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 221			     bool add)
 222{
 223	int rc;
 224
 225	mutex_lock(&card->ip_lock);
 226	rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 227	mutex_unlock(&card->ip_lock);
 228
 229	return rc;
 230}
 231
 232static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 233{
 234	struct qeth_ipaddr *addr;
 235	struct hlist_node *tmp;
 236	int i;
 237
 238	hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 239		hash_del(&addr->hnode);
 240		kfree(addr);
 241	}
 242}
 243
 244static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 245{
 246	struct qeth_ipaddr *addr;
 247	struct hlist_node *tmp;
 248	int i;
 249
 250	QETH_CARD_TEXT(card, 4, "clearip");
 251
 252	mutex_lock(&card->ip_lock);
 253
 254	hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 255		if (!recover) {
 256			hash_del(&addr->hnode);
 257			kfree(addr);
 258		} else {
 259			/* prepare for recovery */
 260			addr->disp_flag = QETH_DISP_ADDR_ADD;
 261		}
 262	}
 263
 264	mutex_unlock(&card->ip_lock);
 265}
 266
 267static void qeth_l3_recover_ip(struct qeth_card *card)
 268{
 269	struct qeth_ipaddr *addr;
 270	struct hlist_node *tmp;
 271	int i;
 272	int rc;
 273
 274	QETH_CARD_TEXT(card, 4, "recovrip");
 275
 276	mutex_lock(&card->ip_lock);
 277
 278	hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 279		if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 280			rc = qeth_l3_register_addr_entry(card, addr);
 281
 282			if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 283				/* keep it in the records */
 284				addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 285			} else {
 286				/* bad address */
 287				hash_del(&addr->hnode);
 288				kfree(addr);
 289			}
 290		}
 291	}
 292
 293	mutex_unlock(&card->ip_lock);
 294}
 295
 296static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 297			       unsigned long data)
 298{
 299	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 300
 301	switch (cmd->hdr.return_code) {
 302	case IPA_RC_SUCCESS:
 303		return 0;
 304	case IPA_RC_DUPLICATE_IP_ADDRESS:
 305		return -EADDRINUSE;
 306	case IPA_RC_MC_ADDR_NOT_FOUND:
 307		return -ENOENT;
 308	case IPA_RC_LAN_OFFLINE:
 309		return -ENETDOWN;
 310	default:
 311		return -EIO;
 312	}
 313}
 314
 315static int qeth_l3_send_setdelmc(struct qeth_card *card,
 316				 struct qeth_ipaddr *addr,
 317				 enum qeth_ipa_cmds ipacmd)
 318{
 319	struct qeth_cmd_buffer *iob;
 320	struct qeth_ipa_cmd *cmd;
 321
 322	QETH_CARD_TEXT(card, 4, "setdelmc");
 323
 324	iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 325				 IPA_DATA_SIZEOF(setdelipm));
 326	if (!iob)
 327		return -ENOMEM;
 328	cmd = __ipa_cmd(iob);
 329	if (addr->proto == QETH_PROT_IPV6) {
 330		cmd->data.setdelipm.ip = addr->u.a6.addr;
 331		ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 332	} else {
 333		cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 334		ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 335	}
 336
 337	return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 338}
 339
 340static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 341{
 342	unsigned int i = 0;
 343
 344	while (len && i < 4) {
 345		int mask_len = min_t(int, len, 32);
 346
 347		prefix->s6_addr32[i] = inet_make_mask(mask_len);
 348		len -= mask_len;
 349		i++;
 350	}
 351}
 352
 353static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 354{
 355	switch (addr->type) {
 356	case QETH_IP_TYPE_RXIP:
 357		return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 358	case QETH_IP_TYPE_VIPA:
 359		return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 360			       QETH_IPA_DELIP_VIPA_FLAG;
 361	default:
 362		return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 363	}
 364}
 365
 366static int qeth_l3_send_setdelip(struct qeth_card *card,
 367				 struct qeth_ipaddr *addr,
 368				 enum qeth_ipa_cmds ipacmd)
 369{
 370	struct qeth_cmd_buffer *iob;
 371	struct qeth_ipa_cmd *cmd;
 372	u32 flags;
 373
 374	QETH_CARD_TEXT(card, 4, "setdelip");
 375
 376	iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 377				 IPA_DATA_SIZEOF(setdelip6));
 378	if (!iob)
 379		return -ENOMEM;
 380	cmd = __ipa_cmd(iob);
 381
 382	flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 383	QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 384
 385	if (addr->proto == QETH_PROT_IPV6) {
 386		cmd->data.setdelip6.addr = addr->u.a6.addr;
 387		qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 388					addr->u.a6.pfxlen);
 389		cmd->data.setdelip6.flags = flags;
 390	} else {
 391		cmd->data.setdelip4.addr = addr->u.a4.addr;
 392		cmd->data.setdelip4.mask = addr->u.a4.mask;
 393		cmd->data.setdelip4.flags = flags;
 394	}
 395
 396	return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 397}
 398
 399static int qeth_l3_send_setrouting(struct qeth_card *card,
 400	enum qeth_routing_types type, enum qeth_prot_versions prot)
 401{
 402	int rc;
 403	struct qeth_ipa_cmd *cmd;
 404	struct qeth_cmd_buffer *iob;
 405
 406	QETH_CARD_TEXT(card, 4, "setroutg");
 407	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 408				 IPA_DATA_SIZEOF(setrtg));
 409	if (!iob)
 410		return -ENOMEM;
 411	cmd = __ipa_cmd(iob);
 412	cmd->data.setrtg.type = (type);
 413	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 414
 415	return rc;
 416}
 417
 418static int qeth_l3_correct_routing_type(struct qeth_card *card,
 419		enum qeth_routing_types *type, enum qeth_prot_versions prot)
 420{
 421	if (IS_IQD(card)) {
 422		switch (*type) {
 423		case NO_ROUTER:
 424		case PRIMARY_CONNECTOR:
 425		case SECONDARY_CONNECTOR:
 426		case MULTICAST_ROUTER:
 427			return 0;
 428		default:
 429			goto out_inval;
 430		}
 431	} else {
 432		switch (*type) {
 433		case NO_ROUTER:
 434		case PRIMARY_ROUTER:
 435		case SECONDARY_ROUTER:
 436			return 0;
 437		case MULTICAST_ROUTER:
 438			if (qeth_is_ipafunc_supported(card, prot,
 439						      IPA_OSA_MC_ROUTER))
 440				return 0;
 441			goto out_inval;
 442		default:
 443			goto out_inval;
 444		}
 445	}
 446out_inval:
 447	*type = NO_ROUTER;
 448	return -EINVAL;
 449}
 450
 451int qeth_l3_setrouting_v4(struct qeth_card *card)
 452{
 453	int rc;
 454
 455	QETH_CARD_TEXT(card, 3, "setrtg4");
 456
 457	rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 458				  QETH_PROT_IPV4);
 459	if (rc)
 460		return rc;
 461
 462	rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 463				  QETH_PROT_IPV4);
 464	if (rc) {
 465		card->options.route4.type = NO_ROUTER;
 466		QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 467				 rc, CARD_DEVID(card));
 468	}
 469	return rc;
 470}
 471
 472int qeth_l3_setrouting_v6(struct qeth_card *card)
 473{
 474	int rc = 0;
 475
 476	QETH_CARD_TEXT(card, 3, "setrtg6");
 477
 478	if (!qeth_is_supported(card, IPA_IPV6))
 479		return 0;
 480	rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 481				  QETH_PROT_IPV6);
 482	if (rc)
 483		return rc;
 484
 485	rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 486				  QETH_PROT_IPV6);
 487	if (rc) {
 488		card->options.route6.type = NO_ROUTER;
 489		QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 490				 rc, CARD_DEVID(card));
 491	}
 492	return rc;
 493}
 494
 495/*
 496 * IP address takeover related functions
 497 */
 498
 499/*
 500 * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 501 *
 502 * Caller must hold ip_lock.
 503 */
 504void qeth_l3_update_ipato(struct qeth_card *card)
 505{
 506	struct qeth_ipaddr *addr;
 507	unsigned int i;
 508
 509	hash_for_each(card->ip_htable, i, addr, hnode) {
 510		if (addr->type != QETH_IP_TYPE_NORMAL)
 511			continue;
 512		addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 513	}
 514}
 515
 516static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 517{
 518	struct qeth_ipato_entry *ipatoe, *tmp;
 519
 520	mutex_lock(&card->ip_lock);
 521
 522	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 523		list_del(&ipatoe->entry);
 524		kfree(ipatoe);
 525	}
 526
 527	qeth_l3_update_ipato(card);
 528	mutex_unlock(&card->ip_lock);
 529}
 530
 531int qeth_l3_add_ipato_entry(struct qeth_card *card,
 532				struct qeth_ipato_entry *new)
 533{
 534	struct qeth_ipato_entry *ipatoe;
 535	int rc = 0;
 536
 537	QETH_CARD_TEXT(card, 2, "addipato");
 538
 539	mutex_lock(&card->ip_lock);
 540
 541	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 542		if (ipatoe->proto != new->proto)
 543			continue;
 544		if (!memcmp(ipatoe->addr, new->addr,
 545			    (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
 546		    (ipatoe->mask_bits == new->mask_bits)) {
 547			rc = -EEXIST;
 548			break;
 549		}
 550	}
 551
 552	if (!rc) {
 553		list_add_tail(&new->entry, &card->ipato.entries);
 554		qeth_l3_update_ipato(card);
 555	}
 556
 557	mutex_unlock(&card->ip_lock);
 558
 559	return rc;
 560}
 561
 562int qeth_l3_del_ipato_entry(struct qeth_card *card,
 563			    enum qeth_prot_versions proto, u8 *addr,
 564			    unsigned int mask_bits)
 565{
 566	struct qeth_ipato_entry *ipatoe, *tmp;
 567	int rc = -ENOENT;
 568
 569	QETH_CARD_TEXT(card, 2, "delipato");
 570
 571	mutex_lock(&card->ip_lock);
 572
 573	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 574		if (ipatoe->proto != proto)
 575			continue;
 576		if (!memcmp(ipatoe->addr, addr,
 577			    (proto == QETH_PROT_IPV4) ? 4 : 16) &&
 578		    (ipatoe->mask_bits == mask_bits)) {
 579			list_del(&ipatoe->entry);
 580			qeth_l3_update_ipato(card);
 581			kfree(ipatoe);
 582			rc = 0;
 583		}
 584	}
 585
 586	mutex_unlock(&card->ip_lock);
 587
 588	return rc;
 589}
 590
 591int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 592			     enum qeth_ip_types type,
 593			     enum qeth_prot_versions proto)
 594{
 595	struct qeth_ipaddr addr;
 596
 597	qeth_l3_init_ipaddr(&addr, type, proto);
 598	if (proto == QETH_PROT_IPV4)
 599		memcpy(&addr.u.a4.addr, ip, 4);
 600	else
 601		memcpy(&addr.u.a6.addr, ip, 16);
 602
 603	return qeth_l3_modify_ip(card, &addr, add);
 604}
 605
 606int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 607{
 608	struct qeth_ipaddr addr;
 609	unsigned int i;
 610
 611	qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 612	addr.u.a6.addr.s6_addr[0] = 0xfe;
 613	addr.u.a6.addr.s6_addr[1] = 0x80;
 614	for (i = 0; i < 8; i++)
 615		addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 616
 617	return qeth_l3_modify_ip(card, &addr, add);
 618}
 619
 620static int qeth_l3_register_addr_entry(struct qeth_card *card,
 621				struct qeth_ipaddr *addr)
 622{
 623	char buf[50];
 624	int rc = 0;
 625	int cnt = 3;
 626
 627	if (card->options.sniffer)
 628		return 0;
 629
 630	if (addr->proto == QETH_PROT_IPV4) {
 631		QETH_CARD_TEXT(card, 2, "setaddr4");
 632		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 633	} else if (addr->proto == QETH_PROT_IPV6) {
 634		QETH_CARD_TEXT(card, 2, "setaddr6");
 635		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 636		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 637	} else {
 638		QETH_CARD_TEXT(card, 2, "setaddr?");
 639		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 640	}
 641	do {
 642		if (addr->is_multicast)
 643			rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 644		else
 645			rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 646		if (rc)
 647			QETH_CARD_TEXT(card, 2, "failed");
 648	} while ((--cnt > 0) && rc);
 649	if (rc) {
 650		QETH_CARD_TEXT(card, 2, "FAILED");
 651		qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 652		dev_warn(&card->gdev->dev,
 653			"Registering IP address %s failed\n", buf);
 654	}
 655	return rc;
 656}
 657
 658static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 659						struct qeth_ipaddr *addr)
 660{
 661	int rc = 0;
 662
 663	if (card->options.sniffer)
 664		return 0;
 665
 666	if (addr->proto == QETH_PROT_IPV4) {
 667		QETH_CARD_TEXT(card, 2, "deladdr4");
 668		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 669	} else if (addr->proto == QETH_PROT_IPV6) {
 670		QETH_CARD_TEXT(card, 2, "deladdr6");
 671		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 672		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 673	} else {
 674		QETH_CARD_TEXT(card, 2, "deladdr?");
 675		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 676	}
 677	if (addr->is_multicast)
 678		rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 679	else
 680		rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 681	if (rc)
 682		QETH_CARD_TEXT(card, 2, "failed");
 683
 684	return rc;
 685}
 686
 687static int qeth_l3_setadapter_parms(struct qeth_card *card)
 688{
 689	int rc = 0;
 690
 691	QETH_CARD_TEXT(card, 2, "setadprm");
 692
 693	if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 694		rc = qeth_setadpparms_change_macaddr(card);
 695		if (rc)
 696			dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 697				" address failed\n");
 698	}
 699
 700	return rc;
 701}
 702
 703static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 704{
 705	int rc;
 706
 707	QETH_CARD_TEXT(card, 3, "ipaarp");
 708
 709	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 710		dev_info(&card->gdev->dev,
 711			 "ARP processing not supported on %s!\n",
 712			 netdev_name(card->dev));
 713		return 0;
 714	}
 715	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 716					  IPA_CMD_ASS_START, NULL);
 717	if (rc) {
 718		dev_warn(&card->gdev->dev,
 719			 "Starting ARP processing support for %s failed\n",
 720			 netdev_name(card->dev));
 721	}
 722	return rc;
 723}
 724
 725static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 726{
 727	int rc;
 728
 729	QETH_CARD_TEXT(card, 3, "stsrcmac");
 730
 731	if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 732		dev_info(&card->gdev->dev,
 733			 "Inbound source MAC-address not supported on %s\n",
 734			 netdev_name(card->dev));
 735		return -EOPNOTSUPP;
 736	}
 737
 738	rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 739					  IPA_CMD_ASS_START, NULL);
 740	if (rc)
 741		dev_warn(&card->gdev->dev,
 742			 "Starting source MAC-address support for %s failed\n",
 743			 netdev_name(card->dev));
 744	return rc;
 745}
 746
 747static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 748{
 749	int rc = 0;
 750
 751	QETH_CARD_TEXT(card, 3, "strtvlan");
 752
 753	if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 754		dev_info(&card->gdev->dev,
 755			 "VLAN not supported on %s\n", netdev_name(card->dev));
 756		return -EOPNOTSUPP;
 757	}
 758
 759	rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 760					  IPA_CMD_ASS_START, NULL);
 761	if (rc) {
 762		dev_warn(&card->gdev->dev,
 763			 "Starting VLAN support for %s failed\n",
 764			 netdev_name(card->dev));
 765	} else {
 766		dev_info(&card->gdev->dev, "VLAN enabled\n");
 767	}
 768	return rc;
 769}
 770
 771static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 772{
 773	int rc;
 774
 775	QETH_CARD_TEXT(card, 3, "stmcast");
 776
 777	if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 778		dev_info(&card->gdev->dev,
 779			 "Multicast not supported on %s\n",
 780			 netdev_name(card->dev));
 781		return -EOPNOTSUPP;
 782	}
 783
 784	rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 785					  IPA_CMD_ASS_START, NULL);
 786	if (rc) {
 787		dev_warn(&card->gdev->dev,
 788			 "Starting multicast support for %s failed\n",
 789			 netdev_name(card->dev));
 790	} else {
 791		dev_info(&card->gdev->dev, "Multicast enabled\n");
 792		card->dev->flags |= IFF_MULTICAST;
 793	}
 794	return rc;
 795}
 796
 797static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 798{
 799	u32 ipv6_data = 3;
 800	int rc;
 801
 802	QETH_CARD_TEXT(card, 3, "softipv6");
 803
 804	if (IS_IQD(card))
 805		goto out;
 806
 807	rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 808					  &ipv6_data);
 809	if (rc) {
 810		dev_err(&card->gdev->dev,
 811			"Activating IPv6 support for %s failed\n",
 812			netdev_name(card->dev));
 813		return rc;
 814	}
 815	rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 816					     NULL);
 817	if (rc) {
 818		dev_err(&card->gdev->dev,
 819			"Activating IPv6 support for %s failed\n",
 820			 netdev_name(card->dev));
 821		return rc;
 822	}
 823	rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 824					     IPA_CMD_ASS_START, NULL);
 825	if (rc) {
 826		dev_warn(&card->gdev->dev,
 827			 "Enabling the passthrough mode for %s failed\n",
 828			 netdev_name(card->dev));
 829		return rc;
 830	}
 831out:
 832	dev_info(&card->gdev->dev, "IPV6 enabled\n");
 833	return 0;
 834}
 835
 836static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 837{
 838	QETH_CARD_TEXT(card, 3, "strtipv6");
 839
 840	if (!qeth_is_supported(card, IPA_IPV6)) {
 841		dev_info(&card->gdev->dev,
 842			 "IPv6 not supported on %s\n", netdev_name(card->dev));
 843		return 0;
 844	}
 845	return qeth_l3_softsetup_ipv6(card);
 846}
 847
 848static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 849{
 850	u32 filter_data = 1;
 851	int rc;
 852
 853	QETH_CARD_TEXT(card, 3, "stbrdcst");
 854	card->info.broadcast_capable = 0;
 855	if (!qeth_is_supported(card, IPA_FILTERING)) {
 856		dev_info(&card->gdev->dev,
 857			 "Broadcast not supported on %s\n",
 858			 netdev_name(card->dev));
 859		rc = -EOPNOTSUPP;
 860		goto out;
 861	}
 862	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 863					  IPA_CMD_ASS_START, NULL);
 864	if (rc) {
 865		dev_warn(&card->gdev->dev,
 866			 "Enabling broadcast filtering for %s failed\n",
 867			 netdev_name(card->dev));
 868		goto out;
 869	}
 870
 871	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 872					  IPA_CMD_ASS_CONFIGURE, &filter_data);
 873	if (rc) {
 874		dev_warn(&card->gdev->dev,
 875			 "Setting up broadcast filtering for %s failed\n",
 876			 netdev_name(card->dev));
 877		goto out;
 878	}
 879	card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 880	dev_info(&card->gdev->dev, "Broadcast enabled\n");
 881	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 882					  IPA_CMD_ASS_ENABLE, &filter_data);
 883	if (rc) {
 884		dev_warn(&card->gdev->dev,
 885			 "Setting up broadcast echo filtering for %s failed\n",
 886			 netdev_name(card->dev));
 887		goto out;
 888	}
 889	card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 890out:
 891	if (card->info.broadcast_capable)
 892		card->dev->flags |= IFF_BROADCAST;
 893	else
 894		card->dev->flags &= ~IFF_BROADCAST;
 895	return rc;
 896}
 897
 898static void qeth_l3_start_ipassists(struct qeth_card *card)
 899{
 900	QETH_CARD_TEXT(card, 3, "strtipas");
 901
 902	qeth_l3_start_ipa_arp_processing(card);	/* go on*/
 903	qeth_l3_start_ipa_source_mac(card);	/* go on*/
 904	qeth_l3_start_ipa_vlan(card);		/* go on*/
 905	qeth_l3_start_ipa_multicast(card);		/* go on*/
 906	qeth_l3_start_ipa_ipv6(card);		/* go on*/
 907	qeth_l3_start_ipa_broadcast(card);		/* go on*/
 908}
 909
 910static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 911		struct qeth_reply *reply, unsigned long data)
 912{
 913	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 914
 915	if (cmd->hdr.return_code)
 916		return -EIO;
 917	if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 918		return -EADDRNOTAVAIL;
 919
 920	eth_hw_addr_set(card->dev, cmd->data.create_destroy_addr.mac_addr);
 921	return 0;
 922}
 923
 924static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 925{
 926	int rc = 0;
 927	struct qeth_cmd_buffer *iob;
 928
 929	QETH_CARD_TEXT(card, 2, "hsrmac");
 930
 931	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 932				 IPA_DATA_SIZEOF(create_destroy_addr));
 933	if (!iob)
 934		return -ENOMEM;
 935
 936	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 937				NULL);
 938	return rc;
 939}
 940
 941static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 942		struct qeth_reply *reply, unsigned long data)
 943{
 944	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 945	u16 *uid = reply->param;
 946
 947	if (cmd->hdr.return_code == 0) {
 948		*uid = cmd->data.create_destroy_addr.uid;
 949		return 0;
 950	}
 951
 952	dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 953	return -EIO;
 954}
 955
 956static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 957{
 958	struct qeth_cmd_buffer *iob;
 959
 960	QETH_CARD_TEXT(card, 2, "guniqeid");
 961
 962	if (!qeth_is_supported(card, IPA_IPV6))
 963		goto out;
 964
 965	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 966				 IPA_DATA_SIZEOF(create_destroy_addr));
 967	if (!iob)
 968		goto out;
 969
 970	__ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 971	qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 972
 973out:
 974	return uid;
 975}
 976
 977static int
 978qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 979			    unsigned long data)
 980{
 981	struct qeth_ipa_cmd	   *cmd;
 982	__u16 rc;
 983
 984	QETH_CARD_TEXT(card, 2, "diastrcb");
 985
 986	cmd = (struct qeth_ipa_cmd *)data;
 987	rc = cmd->hdr.return_code;
 988	if (rc)
 989		QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 990	switch (cmd->data.diagass.action) {
 991	case QETH_DIAGS_CMD_TRACE_QUERY:
 992		break;
 993	case QETH_DIAGS_CMD_TRACE_DISABLE:
 994		switch (rc) {
 995		case 0:
 996		case IPA_RC_INVALID_SUBCMD:
 997			card->info.promisc_mode = SET_PROMISC_MODE_OFF;
 998			dev_info(&card->gdev->dev, "The HiperSockets network "
 999				"traffic analyzer is deactivated\n");
1000			break;
1001		default:
1002			break;
1003		}
1004		break;
1005	case QETH_DIAGS_CMD_TRACE_ENABLE:
1006		switch (rc) {
1007		case 0:
1008			card->info.promisc_mode = SET_PROMISC_MODE_ON;
1009			dev_info(&card->gdev->dev, "The HiperSockets network "
1010				"traffic analyzer is activated\n");
1011			break;
1012		case IPA_RC_HARDWARE_AUTH_ERROR:
1013			dev_warn(&card->gdev->dev, "The device is not "
1014				"authorized to run as a HiperSockets network "
1015				"traffic analyzer\n");
1016			break;
1017		case IPA_RC_TRACE_ALREADY_ACTIVE:
1018			dev_warn(&card->gdev->dev, "A HiperSockets "
1019				"network traffic analyzer is already "
1020				"active in the HiperSockets LAN\n");
1021			break;
1022		default:
1023			break;
1024		}
1025		break;
1026	default:
1027		QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1028				 cmd->data.diagass.action, CARD_DEVID(card));
1029	}
1030
1031	return rc ? -EIO : 0;
1032}
1033
1034static int
1035qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1036{
1037	struct qeth_cmd_buffer *iob;
1038	struct qeth_ipa_cmd    *cmd;
1039
1040	QETH_CARD_TEXT(card, 2, "diagtrac");
1041
1042	iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1043	if (!iob)
1044		return -ENOMEM;
1045	cmd = __ipa_cmd(iob);
1046	cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1047	cmd->data.diagass.action = diags_cmd;
1048	return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1049}
1050
1051static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1052{
1053	struct qeth_card *card = arg;
1054	struct inet6_dev *in6_dev;
1055	struct in_device *in4_dev;
1056	struct qeth_ipaddr *ipm;
1057	struct qeth_ipaddr tmp;
1058	struct ip_mc_list *im4;
1059	struct ifmcaddr6 *im6;
1060
1061	QETH_CARD_TEXT(card, 4, "addmc");
1062
1063	if (!dev || !(dev->flags & IFF_UP))
1064		goto out;
1065
1066	in4_dev = __in_dev_get_rtnl(dev);
1067	if (!in4_dev)
1068		goto walk_ipv6;
1069
1070	qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1071	tmp.disp_flag = QETH_DISP_ADDR_ADD;
1072	tmp.is_multicast = 1;
1073
1074	for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1075	     im4 = rtnl_dereference(im4->next_rcu)) {
1076		tmp.u.a4.addr = im4->multiaddr;
1077
1078		ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1079		if (ipm) {
1080			/* for mcast, by-IP match means full match */
1081			ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1082			continue;
1083		}
1084
1085		ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1086		if (!ipm)
1087			continue;
1088
1089		hash_add(card->rx_mode_addrs, &ipm->hnode,
1090			 qeth_l3_ipaddr_hash(ipm));
1091	}
1092
1093walk_ipv6:
1094	if (!qeth_is_supported(card, IPA_IPV6))
1095		goto out;
1096
1097	in6_dev = __in6_dev_get(dev);
1098	if (!in6_dev)
1099		goto out;
1100
1101	qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1102	tmp.disp_flag = QETH_DISP_ADDR_ADD;
1103	tmp.is_multicast = 1;
1104
1105	for (im6 = rtnl_dereference(in6_dev->mc_list);
1106	     im6;
1107	     im6 = rtnl_dereference(im6->next)) {
1108		tmp.u.a6.addr = im6->mca_addr;
1109
1110		ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1111		if (ipm) {
1112			/* for mcast, by-IP match means full match */
1113			ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1114			continue;
1115		}
1116
1117		ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1118		if (!ipm)
1119			continue;
1120
1121		hash_add(card->rx_mode_addrs, &ipm->hnode,
1122			 qeth_l3_ipaddr_hash(ipm));
1123
1124	}
1125
1126out:
1127	return 0;
1128}
1129
1130static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1131{
1132	bool enable = card->dev->flags & IFF_PROMISC;
1133
1134	if (card->info.promisc_mode == enable)
1135		return;
1136
1137	if (IS_VM_NIC(card)) {		/* Guestlan trace */
1138		if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1139			qeth_setadp_promisc_mode(card, enable);
1140	} else if (card->options.sniffer &&	/* HiperSockets trace */
1141		   qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1142		if (enable) {
1143			QETH_CARD_TEXT(card, 3, "+promisc");
1144			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1145		} else {
1146			QETH_CARD_TEXT(card, 3, "-promisc");
1147			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1148		}
1149	}
1150}
1151
1152static void qeth_l3_rx_mode_work(struct work_struct *work)
1153{
1154	struct qeth_card *card = container_of(work, struct qeth_card,
1155					      rx_mode_work);
1156	struct qeth_ipaddr *addr;
1157	struct hlist_node *tmp;
1158	int i, rc;
1159
1160	QETH_CARD_TEXT(card, 3, "setmulti");
1161
1162	if (!card->options.sniffer) {
1163		rtnl_lock();
1164		qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1165		if (qeth_is_supported(card, IPA_FULL_VLAN))
1166			vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1167		rtnl_unlock();
1168
1169		hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1170			switch (addr->disp_flag) {
1171			case QETH_DISP_ADDR_DELETE:
1172				rc = qeth_l3_deregister_addr_entry(card, addr);
1173				if (!rc || rc == -ENOENT) {
1174					hash_del(&addr->hnode);
1175					kfree(addr);
1176				}
1177				break;
1178			case QETH_DISP_ADDR_ADD:
1179				rc = qeth_l3_register_addr_entry(card, addr);
1180				if (rc && rc != -ENETDOWN) {
1181					hash_del(&addr->hnode);
1182					kfree(addr);
1183					break;
1184				}
1185				fallthrough;
1186			default:
1187				/* for next call to set_rx_mode(): */
1188				addr->disp_flag = QETH_DISP_ADDR_DELETE;
1189			}
1190		}
1191	}
1192
1193	qeth_l3_set_promisc_mode(card);
1194}
1195
1196static int qeth_l3_arp_makerc(u16 rc)
1197{
1198	switch (rc) {
1199	case IPA_RC_SUCCESS:
1200		return 0;
1201	case QETH_IPA_ARP_RC_NOTSUPP:
1202	case QETH_IPA_ARP_RC_Q_NOTSUPP:
1203		return -EOPNOTSUPP;
1204	case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1205		return -EINVAL;
1206	case QETH_IPA_ARP_RC_Q_NO_DATA:
1207		return -ENOENT;
1208	default:
1209		return -EIO;
1210	}
1211}
1212
1213static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1214			      unsigned long data)
1215{
1216	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1217
1218	qeth_setassparms_cb(card, reply, data);
1219	return qeth_l3_arp_makerc(cmd->hdr.return_code);
1220}
1221
1222static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1223{
1224	struct qeth_cmd_buffer *iob;
1225	int rc;
1226
1227	QETH_CARD_TEXT(card, 3, "arpstnoe");
1228
1229	/*
1230	 * currently GuestLAN only supports the ARP assist function
1231	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1232	 * thus we say EOPNOTSUPP for this ARP function
1233	 */
1234	if (IS_VM_NIC(card))
1235		return -EOPNOTSUPP;
1236	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1237		return -EOPNOTSUPP;
1238	}
1239
1240	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1241				       IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1242				       SETASS_DATA_SIZEOF(flags_32bit),
1243				       QETH_PROT_IPV4);
1244	if (!iob)
1245		return -ENOMEM;
1246
1247	__ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1248	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1249	if (rc)
1250		QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1251				 CARD_DEVID(card), rc);
1252	return rc;
1253}
1254
1255static __u32 get_arp_entry_size(struct qeth_card *card,
1256			struct qeth_arp_query_data *qdata,
1257			struct qeth_arp_entrytype *type, __u8 strip_entries)
1258{
1259	__u32 rc;
1260	__u8 is_hsi;
1261
1262	is_hsi = qdata->reply_bits == 5;
1263	if (type->ip == QETHARP_IP_ADDR_V4) {
1264		QETH_CARD_TEXT(card, 4, "arpev4");
1265		if (strip_entries) {
1266			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1267				sizeof(struct qeth_arp_qi_entry7_short);
1268		} else {
1269			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1270				sizeof(struct qeth_arp_qi_entry7);
1271		}
1272	} else if (type->ip == QETHARP_IP_ADDR_V6) {
1273		QETH_CARD_TEXT(card, 4, "arpev6");
1274		if (strip_entries) {
1275			rc = is_hsi ?
1276				sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1277				sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1278		} else {
1279			rc = is_hsi ?
1280				sizeof(struct qeth_arp_qi_entry5_ipv6) :
1281				sizeof(struct qeth_arp_qi_entry7_ipv6);
1282		}
1283	} else {
1284		QETH_CARD_TEXT(card, 4, "arpinv");
1285		rc = 0;
1286	}
1287
1288	return rc;
1289}
1290
1291static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1292{
1293	return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1294		(type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1295}
1296
1297static int qeth_l3_arp_query_cb(struct qeth_card *card,
1298		struct qeth_reply *reply, unsigned long data)
1299{
1300	struct qeth_ipa_cmd *cmd;
1301	struct qeth_arp_query_data *qdata;
1302	struct qeth_arp_query_info *qinfo;
1303	int e;
1304	int entrybytes_done;
1305	int stripped_bytes;
1306	__u8 do_strip_entries;
1307
1308	QETH_CARD_TEXT(card, 3, "arpquecb");
1309
1310	qinfo = (struct qeth_arp_query_info *) reply->param;
1311	cmd = (struct qeth_ipa_cmd *) data;
1312	QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1313	if (cmd->hdr.return_code) {
1314		QETH_CARD_TEXT(card, 4, "arpcberr");
1315		QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1316		return qeth_l3_arp_makerc(cmd->hdr.return_code);
1317	}
1318	if (cmd->data.setassparms.hdr.return_code) {
1319		cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1320		QETH_CARD_TEXT(card, 4, "setaperr");
1321		QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1322		return qeth_l3_arp_makerc(cmd->hdr.return_code);
1323	}
1324	qdata = &cmd->data.setassparms.data.query_arp;
1325	QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1326
1327	do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1328	stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1329	entrybytes_done = 0;
1330	for (e = 0; e < qdata->no_entries; ++e) {
1331		char *cur_entry;
1332		__u32 esize;
1333		struct qeth_arp_entrytype *etype;
1334
1335		cur_entry = &qdata->data + entrybytes_done;
1336		etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1337		if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1338			QETH_CARD_TEXT(card, 4, "pmis");
1339			QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1340			break;
1341		}
1342		esize = get_arp_entry_size(card, qdata, etype,
1343			do_strip_entries);
1344		QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1345		if (!esize)
1346			break;
1347
1348		if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1349			QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1350			memset(qinfo->udata, 0, 4);
1351			return -ENOSPC;
1352		}
1353
1354		memcpy(qinfo->udata + qinfo->udata_offset,
1355			&qdata->data + entrybytes_done + stripped_bytes,
1356			esize);
1357		entrybytes_done += esize + stripped_bytes;
1358		qinfo->udata_offset += esize;
1359		++qinfo->no_entries;
1360	}
1361	/* check if all replies received ... */
1362	if (cmd->data.setassparms.hdr.seq_no <
1363	    cmd->data.setassparms.hdr.number_of_replies)
1364		return 1;
1365	QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1366	memcpy(qinfo->udata, &qinfo->no_entries, 4);
1367	/* keep STRIP_ENTRIES flag so the user program can distinguish
1368	 * stripped entries from normal ones */
1369	if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1370		qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1371	memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1372	QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1373	return 0;
1374}
1375
1376static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1377	enum qeth_prot_versions prot,
1378	struct qeth_arp_query_info *qinfo)
1379{
1380	struct qeth_cmd_buffer *iob;
1381	struct qeth_ipa_cmd *cmd;
1382	int rc;
1383
1384	QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1385
1386	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1387				       IPA_CMD_ASS_ARP_QUERY_INFO,
1388				       SETASS_DATA_SIZEOF(query_arp), prot);
1389	if (!iob)
1390		return -ENOMEM;
1391	cmd = __ipa_cmd(iob);
1392	cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1393	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1394	if (rc)
1395		QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1396				 CARD_DEVID(card), rc);
1397	return rc;
1398}
1399
1400static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1401{
1402	struct qeth_arp_query_info qinfo = {0, };
1403	int rc;
1404
1405	QETH_CARD_TEXT(card, 3, "arpquery");
1406
1407	if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1408			       IPA_ARP_PROCESSING)) {
1409		QETH_CARD_TEXT(card, 3, "arpqnsup");
1410		rc = -EOPNOTSUPP;
1411		goto out;
1412	}
1413	/* get size of userspace buffer and mask_bits -> 6 bytes */
1414	if (copy_from_user(&qinfo, udata, 6)) {
1415		rc = -EFAULT;
1416		goto out;
1417	}
1418	qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1419	if (!qinfo.udata) {
1420		rc = -ENOMEM;
1421		goto out;
1422	}
1423	qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1424	rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1425	if (rc) {
1426		if (copy_to_user(udata, qinfo.udata, 4))
1427			rc = -EFAULT;
1428		goto free_and_out;
1429	}
1430	if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1431		/* fails in case of GuestLAN QDIO mode */
1432		qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1433	}
1434	if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1435		QETH_CARD_TEXT(card, 4, "qactf");
1436		rc = -EFAULT;
1437		goto free_and_out;
1438	}
1439	QETH_CARD_TEXT(card, 4, "qacts");
1440
1441free_and_out:
1442	kfree(qinfo.udata);
1443out:
1444	return rc;
1445}
1446
1447static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1448				    struct qeth_arp_cache_entry *entry,
1449				    enum qeth_arp_process_subcmds arp_cmd)
1450{
1451	struct qeth_arp_cache_entry *cmd_entry;
1452	struct qeth_cmd_buffer *iob;
1453	int rc;
1454
1455	if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1456		QETH_CARD_TEXT(card, 3, "arpadd");
1457	else
1458		QETH_CARD_TEXT(card, 3, "arpdel");
1459
1460	/*
1461	 * currently GuestLAN only supports the ARP assist function
1462	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1463	 * thus we say EOPNOTSUPP for this ARP function
1464	 */
1465	if (IS_VM_NIC(card))
1466		return -EOPNOTSUPP;
1467	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1468		return -EOPNOTSUPP;
1469	}
1470
1471	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1472				       SETASS_DATA_SIZEOF(arp_entry),
1473				       QETH_PROT_IPV4);
1474	if (!iob)
1475		return -ENOMEM;
1476
1477	cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1478	ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1479	memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1480	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1481	if (rc)
1482		QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1483				 arp_cmd, CARD_DEVID(card), rc);
1484	return rc;
1485}
1486
1487static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1488{
1489	struct qeth_cmd_buffer *iob;
1490	int rc;
1491
1492	QETH_CARD_TEXT(card, 3, "arpflush");
1493
1494	/*
1495	 * currently GuestLAN only supports the ARP assist function
1496	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1497	 * thus we say EOPNOTSUPP for this ARP function
1498	*/
1499	if (IS_VM_NIC(card) || IS_IQD(card))
1500		return -EOPNOTSUPP;
1501	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1502		return -EOPNOTSUPP;
1503	}
1504
1505	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1506				       IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1507				       QETH_PROT_IPV4);
1508	if (!iob)
1509		return -ENOMEM;
1510
1511	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1512	if (rc)
1513		QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1514				 CARD_DEVID(card), rc);
1515	return rc;
1516}
1517
1518static int qeth_l3_ndo_siocdevprivate(struct net_device *dev, struct ifreq *rq,
1519				      void __user *data, int cmd)
1520{
1521	struct qeth_card *card = dev->ml_priv;
1522	struct qeth_arp_cache_entry arp_entry;
1523	enum qeth_arp_process_subcmds arp_cmd;
1524	int rc = 0;
1525
1526	switch (cmd) {
1527	case SIOC_QETH_ARP_SET_NO_ENTRIES:
1528		if (!capable(CAP_NET_ADMIN)) {
1529			rc = -EPERM;
1530			break;
1531		}
1532		rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1533		break;
1534	case SIOC_QETH_ARP_QUERY_INFO:
1535		if (!capable(CAP_NET_ADMIN)) {
1536			rc = -EPERM;
1537			break;
1538		}
1539		rc = qeth_l3_arp_query(card, data);
1540		break;
1541	case SIOC_QETH_ARP_ADD_ENTRY:
1542	case SIOC_QETH_ARP_REMOVE_ENTRY:
1543		if (!capable(CAP_NET_ADMIN))
1544			return -EPERM;
1545		if (copy_from_user(&arp_entry, data, sizeof(arp_entry)))
1546			return -EFAULT;
1547
1548		arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1549				IPA_CMD_ASS_ARP_ADD_ENTRY :
1550				IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1551		return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1552	case SIOC_QETH_ARP_FLUSH_CACHE:
1553		if (!capable(CAP_NET_ADMIN)) {
1554			rc = -EPERM;
1555			break;
1556		}
1557		rc = qeth_l3_arp_flush_cache(card);
1558		break;
1559	default:
1560		rc = qeth_siocdevprivate(dev, rq, data, cmd);
1561	}
1562	return rc;
1563}
1564
1565static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1566				     __be16 proto)
1567{
1568	struct neighbour *n = NULL;
1569
1570	if (dst)
1571		n = dst_neigh_lookup_skb(dst, skb);
1572
1573	if (n) {
1574		int cast_type = n->type;
1575
1576		neigh_release(n);
1577		if ((cast_type == RTN_BROADCAST) ||
1578		    (cast_type == RTN_MULTICAST) ||
1579		    (cast_type == RTN_ANYCAST))
1580			return cast_type;
1581		return RTN_UNICAST;
1582	}
1583
1584	/* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1585	switch (proto) {
1586	case htons(ETH_P_IP):
1587		if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1588			return RTN_BROADCAST;
1589		return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1590				RTN_MULTICAST : RTN_UNICAST;
1591	case htons(ETH_P_IPV6):
1592		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1593				RTN_MULTICAST : RTN_UNICAST;
1594	case htons(ETH_P_AF_IUCV):
1595		return RTN_UNICAST;
1596	default:
1597		/* OSA only: ... and MAC address */
1598		return qeth_get_ether_cast_type(skb);
1599	}
1600}
1601
1602static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1603{
1604	struct dst_entry *dst;
1605	int cast_type;
1606
1607	rcu_read_lock();
1608	dst = qeth_dst_check_rcu(skb, proto);
1609	cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1610	rcu_read_unlock();
1611
1612	return cast_type;
1613}
1614
1615static u8 qeth_l3_cast_type_to_flag(int cast_type)
1616{
1617	if (cast_type == RTN_MULTICAST)
1618		return QETH_CAST_MULTICAST;
1619	if (cast_type == RTN_ANYCAST)
1620		return QETH_CAST_ANYCAST;
1621	if (cast_type == RTN_BROADCAST)
1622		return QETH_CAST_BROADCAST;
1623	return QETH_CAST_UNICAST;
1624}
1625
1626static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1627				struct qeth_hdr *hdr, struct sk_buff *skb,
1628				__be16 proto, unsigned int data_len)
1629{
1630	struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1631	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1632	struct qeth_card *card = queue->card;
1633	struct dst_entry *dst;
1634	int cast_type;
1635
1636	hdr->hdr.l3.length = data_len;
1637
1638	if (skb_is_gso(skb)) {
1639		hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1640	} else {
1641		hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1642
1643		if (skb->ip_summed == CHECKSUM_PARTIAL) {
1644			qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto);
1645			/* some HW requires combined L3+L4 csum offload: */
1646			if (proto == htons(ETH_P_IP))
1647				hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1648		}
1649	}
1650
1651	if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1652		/* NETIF_F_HW_VLAN_CTAG_TX */
1653		if (skb_vlan_tag_present(skb)) {
1654			hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1655			hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1656		}
1657	} else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1658		hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1659		hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1660	}
1661
1662	rcu_read_lock();
1663	dst = qeth_dst_check_rcu(skb, proto);
1664
1665	if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1666		cast_type = RTN_UNICAST;
1667	else
1668		cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1669	l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1670
1671	switch (proto) {
1672	case htons(ETH_P_IP):
1673		l3_hdr->next_hop.addr.s6_addr32[3] =
1674					qeth_next_hop_v4_rcu(skb, dst);
1675		break;
1676	case htons(ETH_P_IPV6):
1677		l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1678
1679		hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1680		if (!IS_IQD(card))
1681			hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1682		break;
1683	case htons(ETH_P_AF_IUCV):
1684		l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1685		memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1686		       iucv_trans_hdr(skb)->destUserID, 8);
1687		l3_hdr->flags |= QETH_HDR_IPV6;
1688		break;
1689	default:
1690		/* OSA only: */
1691		l3_hdr->flags |= QETH_HDR_PASSTHRU;
1692	}
1693	rcu_read_unlock();
1694}
1695
1696static void qeth_l3_fixup_headers(struct sk_buff *skb)
1697{
1698	struct iphdr *iph = ip_hdr(skb);
1699
1700	/* this is safe, IPv6 traffic takes a different path */
1701	if (skb->ip_summed == CHECKSUM_PARTIAL)
1702		iph->check = 0;
1703	if (skb_is_gso(skb)) {
1704		iph->tot_len = 0;
1705		tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1706						    iph->daddr, 0);
1707	}
1708}
1709
1710static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1711			struct qeth_qdio_out_q *queue, __be16 proto)
1712{
1713	unsigned int hw_hdr_len;
1714	int rc;
1715
1716	/* re-use the L2 header area for the HW header: */
1717	hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1718				       sizeof(struct qeth_hdr);
1719	rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1720	if (rc)
1721		return rc;
1722	skb_pull(skb, ETH_HLEN);
1723
1724	qeth_l3_fixup_headers(skb);
1725	return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1726}
1727
1728static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1729					   struct net_device *dev)
1730{
1731	struct qeth_card *card = dev->ml_priv;
1732	__be16 proto = vlan_get_protocol(skb);
1733	u16 txq = skb_get_queue_mapping(skb);
1734	struct qeth_qdio_out_q *queue;
1735	int rc;
1736
1737	if (!skb_is_gso(skb))
1738		qdisc_skb_cb(skb)->pkt_len = skb->len;
1739	if (IS_IQD(card)) {
1740		queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1741
1742		if (card->options.sniffer)
1743			goto tx_drop;
1744
1745		switch (proto) {
1746		case htons(ETH_P_AF_IUCV):
1747			if (card->options.cq != QETH_CQ_ENABLED)
1748				goto tx_drop;
1749			break;
1750		case htons(ETH_P_IP):
1751		case htons(ETH_P_IPV6):
1752			if (card->options.cq == QETH_CQ_ENABLED)
1753				goto tx_drop;
1754			break;
1755		default:
1756			goto tx_drop;
1757		}
1758	} else {
1759		queue = card->qdio.out_qs[txq];
1760	}
1761
1762	if (!(dev->flags & IFF_BROADCAST) &&
1763	    qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1764		goto tx_drop;
1765
1766	if (proto == htons(ETH_P_IP) || IS_IQD(card))
1767		rc = qeth_l3_xmit(card, skb, queue, proto);
1768	else
1769		rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1770
1771	if (!rc)
1772		return NETDEV_TX_OK;
1773
1774tx_drop:
1775	QETH_TXQ_STAT_INC(queue, tx_dropped);
1776	kfree_skb(skb);
1777	return NETDEV_TX_OK;
1778}
1779
1780static void qeth_l3_set_rx_mode(struct net_device *dev)
1781{
1782	struct qeth_card *card = dev->ml_priv;
1783
1784	schedule_work(&card->rx_mode_work);
1785}
1786
1787/*
1788 * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1789 * NOARP on the netdevice is no option because it also turns off neighbor
1790 * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1791 * arp resolution but we want the hard header (packet socket will work
1792 * e.g. tcpdump)
1793 */
1794static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1795{
1796	n->nud_state = NUD_NOARP;
1797	memcpy(n->ha, "FAKELL", 6);
1798	n->output = n->ops->connected_output;
1799	return 0;
1800}
1801
1802static int
1803qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1804{
1805	if (np->tbl->family == AF_INET)
1806		np->neigh_setup = qeth_l3_neigh_setup_noarp;
1807
1808	return 0;
1809}
1810
1811static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1812						    struct net_device *dev,
1813						    netdev_features_t features)
1814{
1815	if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1816		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1817	return qeth_features_check(skb, dev, features);
1818}
1819
1820static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1821				    struct net_device *sb_dev)
1822{
1823	__be16 proto = vlan_get_protocol(skb);
1824
1825	return qeth_iqd_select_queue(dev, skb,
1826				     qeth_l3_get_cast_type(skb, proto), sb_dev);
1827}
1828
1829static const struct net_device_ops qeth_l3_netdev_ops = {
1830	.ndo_open		= qeth_open,
1831	.ndo_stop		= qeth_stop,
1832	.ndo_get_stats64	= qeth_get_stats64,
1833	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
1834	.ndo_select_queue	= qeth_l3_iqd_select_queue,
1835	.ndo_validate_addr	= eth_validate_addr,
1836	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
1837	.ndo_eth_ioctl		= qeth_do_ioctl,
1838	.ndo_siocdevprivate	= qeth_l3_ndo_siocdevprivate,
1839	.ndo_fix_features	= qeth_fix_features,
1840	.ndo_set_features	= qeth_set_features,
1841	.ndo_tx_timeout		= qeth_tx_timeout,
1842};
1843
1844static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1845	.ndo_open		= qeth_open,
1846	.ndo_stop		= qeth_stop,
1847	.ndo_get_stats64	= qeth_get_stats64,
1848	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
1849	.ndo_features_check	= qeth_l3_osa_features_check,
1850	.ndo_select_queue	= qeth_osa_select_queue,
1851	.ndo_validate_addr	= eth_validate_addr,
1852	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
1853	.ndo_eth_ioctl		= qeth_do_ioctl,
1854	.ndo_siocdevprivate	= qeth_l3_ndo_siocdevprivate,
1855	.ndo_fix_features	= qeth_fix_features,
1856	.ndo_set_features	= qeth_set_features,
1857	.ndo_tx_timeout		= qeth_tx_timeout,
1858	.ndo_neigh_setup	= qeth_l3_neigh_setup,
1859};
1860
1861static int qeth_l3_setup_netdev(struct qeth_card *card)
1862{
1863	struct net_device *dev = card->dev;
1864	unsigned int headroom;
1865	int rc;
1866
1867	if (IS_OSD(card) || IS_OSX(card)) {
1868		card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1869
1870		/*IPv6 address autoconfiguration stuff*/
1871		dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1872
1873		if (!IS_VM_NIC(card)) {
1874			card->dev->features |= NETIF_F_SG;
1875			card->dev->hw_features |= NETIF_F_TSO |
1876				NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1877			card->dev->vlan_features |= NETIF_F_TSO |
1878				NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1879		}
1880
1881		if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1882			card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1883			card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1884		}
1885		if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1886			card->dev->hw_features |= NETIF_F_TSO6;
1887			card->dev->vlan_features |= NETIF_F_TSO6;
1888		}
1889
1890		/* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1891		if (card->dev->hw_features & NETIF_F_TSO6)
1892			headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1893		else if (card->dev->hw_features & NETIF_F_TSO)
1894			headroom = sizeof(struct qeth_hdr_tso);
1895		else
1896			headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1897	} else if (IS_IQD(card)) {
1898		card->dev->flags |= IFF_NOARP;
1899		card->dev->netdev_ops = &qeth_l3_netdev_ops;
1900		headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1901
1902		rc = qeth_l3_iqd_read_initial_mac(card);
1903		if (rc)
1904			return rc;
1905	} else
1906		return -ENODEV;
1907
1908	card->dev->needed_headroom = headroom;
1909	card->dev->features |=	NETIF_F_HW_VLAN_CTAG_TX |
1910				NETIF_F_HW_VLAN_CTAG_RX;
1911
1912	netif_keep_dst(card->dev);
1913	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1914		netif_set_tso_max_size(card->dev,
1915				       PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1916
1917	netif_napi_add(card->dev, &card->napi, qeth_poll);
1918	return register_netdev(card->dev);
1919}
1920
1921static const struct device_type qeth_l3_devtype = {
1922	.name = "qeth_layer3",
1923	.groups = qeth_l3_attr_groups,
1924};
1925
1926static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1927{
1928	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1929	int rc;
1930
1931	hash_init(card->ip_htable);
1932	mutex_init(&card->ip_lock);
1933	card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1934					       dev_name(&gdev->dev));
1935	if (!card->cmd_wq)
1936		return -ENOMEM;
1937
1938	if (gdev->dev.type) {
1939		rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1940		if (rc) {
1941			destroy_workqueue(card->cmd_wq);
1942			return rc;
1943		}
1944	} else {
1945		gdev->dev.type = &qeth_l3_devtype;
1946	}
1947
1948	INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1949	return 0;
1950}
1951
1952static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1953{
1954	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1955
1956	if (cgdev->dev.type != &qeth_l3_devtype)
1957		device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1958
1959	qeth_set_allowed_threads(card, 0, 1);
1960	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1961
1962	if (cgdev->state == CCWGROUP_ONLINE)
1963		qeth_set_offline(card, card->discipline, false);
1964
1965	if (card->dev->reg_state == NETREG_REGISTERED)
1966		unregister_netdev(card->dev);
1967
1968	destroy_workqueue(card->cmd_wq);
1969	qeth_l3_clear_ip_htable(card, 0);
1970	qeth_l3_clear_ipato_list(card);
1971}
1972
1973static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1974{
1975	struct net_device *dev = card->dev;
1976	int rc = 0;
1977
1978	/* softsetup */
1979	QETH_CARD_TEXT(card, 2, "softsetp");
1980
1981	rc = qeth_l3_setadapter_parms(card);
1982	if (rc)
1983		QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1984	if (!card->options.sniffer) {
1985		qeth_l3_start_ipassists(card);
1986
1987		rc = qeth_l3_setrouting_v4(card);
1988		if (rc)
1989			QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1990		rc = qeth_l3_setrouting_v6(card);
1991		if (rc)
1992			QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
1993	}
1994
1995	card->state = CARD_STATE_SOFTSETUP;
1996
1997	qeth_set_allowed_threads(card, 0xffffffff, 0);
1998	qeth_l3_recover_ip(card);
1999
2000	if (dev->reg_state != NETREG_REGISTERED) {
2001		rc = qeth_l3_setup_netdev(card);
2002		if (rc)
2003			goto err_setup;
2004
2005		if (carrier_ok)
2006			netif_carrier_on(dev);
2007	} else {
2008		rtnl_lock();
2009		rc = qeth_set_real_num_tx_queues(card,
2010						 qeth_tx_actual_queues(card));
2011		if (rc) {
2012			rtnl_unlock();
2013			goto err_set_queues;
2014		}
2015
2016		if (carrier_ok)
2017			netif_carrier_on(dev);
2018		else
2019			netif_carrier_off(dev);
2020
2021		netif_device_attach(dev);
2022		qeth_enable_hw_features(dev);
2023
2024		if (netif_running(dev)) {
2025			local_bh_disable();
2026			napi_schedule(&card->napi);
2027			/* kick-start the NAPI softirq: */
2028			local_bh_enable();
2029		}
2030		rtnl_unlock();
2031	}
2032	return 0;
2033
2034err_set_queues:
2035err_setup:
2036	qeth_set_allowed_threads(card, 0, 1);
2037	card->state = CARD_STATE_DOWN;
2038	qeth_l3_clear_ip_htable(card, 1);
2039	return rc;
2040}
2041
2042static void qeth_l3_set_offline(struct qeth_card *card)
2043{
2044	qeth_set_allowed_threads(card, 0, 1);
2045	qeth_l3_drain_rx_mode_cache(card);
2046
2047	if (card->options.sniffer &&
2048	    (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2049		qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2050
2051	if (card->state == CARD_STATE_SOFTSETUP) {
2052		card->state = CARD_STATE_DOWN;
2053		qeth_l3_clear_ip_htable(card, 1);
2054	}
2055}
2056
2057/* Returns zero if the command is successfully "consumed" */
2058static int qeth_l3_control_event(struct qeth_card *card,
2059					struct qeth_ipa_cmd *cmd)
2060{
2061	return 1;
2062}
2063
2064const struct qeth_discipline qeth_l3_discipline = {
2065	.setup = qeth_l3_probe_device,
2066	.remove = qeth_l3_remove_device,
2067	.set_online = qeth_l3_set_online,
2068	.set_offline = qeth_l3_set_offline,
2069	.control_event_handler = qeth_l3_control_event,
2070};
2071EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2072
2073static int qeth_l3_handle_ip_event(struct qeth_card *card,
2074				   struct qeth_ipaddr *addr,
2075				   unsigned long event)
2076{
2077	switch (event) {
2078	case NETDEV_UP:
2079		qeth_l3_modify_ip(card, addr, true);
2080		return NOTIFY_OK;
2081	case NETDEV_DOWN:
2082		qeth_l3_modify_ip(card, addr, false);
2083		return NOTIFY_OK;
2084	default:
2085		return NOTIFY_DONE;
2086	}
2087}
2088
2089struct qeth_l3_ip_event_work {
2090	struct work_struct work;
2091	struct qeth_card *card;
2092	struct qeth_ipaddr addr;
2093};
2094
2095#define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2096
2097static void qeth_l3_add_ip_worker(struct work_struct *work)
2098{
2099	struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2100
2101	qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2102	kfree(work);
2103}
2104
2105static void qeth_l3_delete_ip_worker(struct work_struct *work)
2106{
2107	struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2108
2109	qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2110	kfree(work);
2111}
2112
2113static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2114{
2115	if (is_vlan_dev(dev))
2116		dev = vlan_dev_real_dev(dev);
2117	if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2118	    dev->netdev_ops == &qeth_l3_netdev_ops)
2119		return (struct qeth_card *) dev->ml_priv;
2120	return NULL;
2121}
2122
2123static int qeth_l3_ip_event(struct notifier_block *this,
2124			    unsigned long event, void *ptr)
2125{
2126	struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2127	struct net_device *dev = ifa->ifa_dev->dev;
2128	struct qeth_ipaddr addr;
2129	struct qeth_card *card;
2130
2131	card = qeth_l3_get_card_from_dev(dev);
2132	if (!card)
2133		return NOTIFY_DONE;
2134	QETH_CARD_TEXT(card, 3, "ipevent");
2135
2136	qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2137	addr.u.a4.addr = ifa->ifa_address;
2138	addr.u.a4.mask = ifa->ifa_mask;
2139
2140	return qeth_l3_handle_ip_event(card, &addr, event);
2141}
2142
2143static struct notifier_block qeth_l3_ip_notifier = {
2144	qeth_l3_ip_event,
2145	NULL,
2146};
2147
2148static int qeth_l3_ip6_event(struct notifier_block *this,
2149			     unsigned long event, void *ptr)
2150{
2151	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2152	struct net_device *dev = ifa->idev->dev;
2153	struct qeth_l3_ip_event_work *ip_work;
2154	struct qeth_card *card;
2155
2156	if (event != NETDEV_UP && event != NETDEV_DOWN)
2157		return NOTIFY_DONE;
2158
2159	card = qeth_l3_get_card_from_dev(dev);
2160	if (!card)
2161		return NOTIFY_DONE;
2162	QETH_CARD_TEXT(card, 3, "ip6event");
2163	if (!qeth_is_supported(card, IPA_IPV6))
2164		return NOTIFY_DONE;
2165
2166	ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2167	if (!ip_work)
2168		return NOTIFY_DONE;
2169
2170	if (event == NETDEV_UP)
2171		INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2172	else
2173		INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2174
2175	ip_work->card = card;
2176	qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2177			    QETH_PROT_IPV6);
2178	ip_work->addr.u.a6.addr = ifa->addr;
2179	ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2180
2181	queue_work(card->cmd_wq, &ip_work->work);
2182	return NOTIFY_OK;
2183}
2184
2185static struct notifier_block qeth_l3_ip6_notifier = {
2186	qeth_l3_ip6_event,
2187	NULL,
2188};
2189
2190static int qeth_l3_register_notifiers(void)
2191{
2192	int rc;
2193
2194	QETH_DBF_TEXT(SETUP, 5, "regnotif");
2195	rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2196	if (rc)
2197		return rc;
2198	rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2199	if (rc) {
2200		unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2201		return rc;
2202	}
2203	return 0;
2204}
2205
2206static void qeth_l3_unregister_notifiers(void)
2207{
2208	QETH_DBF_TEXT(SETUP, 5, "unregnot");
2209	WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2210	WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2211}
2212
2213static int __init qeth_l3_init(void)
2214{
2215	pr_info("register layer 3 discipline\n");
2216	return qeth_l3_register_notifiers();
2217}
2218
2219static void __exit qeth_l3_exit(void)
2220{
2221	qeth_l3_unregister_notifiers();
2222	pr_info("unregister layer 3 discipline\n");
2223}
2224
2225module_init(qeth_l3_init);
2226module_exit(qeth_l3_exit);
2227MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2228MODULE_DESCRIPTION("qeth layer 3 discipline");
2229MODULE_LICENSE("GPL");