xref: /openbmc/linux/drivers/s390/net/qeth_l3_main.c (revision 98ddec80)
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/ip6_checksum.h>
37 #include <net/iucv/af_iucv.h>
38 #include <linux/hashtable.h>
39 
40 #include "qeth_l3.h"
41 
42 
43 static int qeth_l3_set_offline(struct ccwgroup_device *);
44 static int qeth_l3_stop(struct net_device *);
45 static void qeth_l3_set_rx_mode(struct net_device *dev);
46 static int qeth_l3_register_addr_entry(struct qeth_card *,
47 		struct qeth_ipaddr *);
48 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
49 		struct qeth_ipaddr *);
50 
51 static void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
52 {
53 	sprintf(buf, "%pI4", addr);
54 }
55 
56 static void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
57 {
58 	sprintf(buf, "%pI6", addr);
59 }
60 
61 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
62 				char *buf)
63 {
64 	if (proto == QETH_PROT_IPV4)
65 		qeth_l3_ipaddr4_to_string(addr, buf);
66 	else if (proto == QETH_PROT_IPV6)
67 		qeth_l3_ipaddr6_to_string(addr, buf);
68 }
69 
70 static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
71 {
72 	struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
73 
74 	if (addr)
75 		qeth_l3_init_ipaddr(addr, QETH_IP_TYPE_NORMAL, prot);
76 	return addr;
77 }
78 
79 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
80 						   struct qeth_ipaddr *query)
81 {
82 	u64 key = qeth_l3_ipaddr_hash(query);
83 	struct qeth_ipaddr *addr;
84 
85 	if (query->is_multicast) {
86 		hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
87 			if (qeth_l3_addr_match_ip(addr, query))
88 				return addr;
89 	} else {
90 		hash_for_each_possible(card->ip_htable,  addr, hnode, key)
91 			if (qeth_l3_addr_match_ip(addr, query))
92 				return addr;
93 	}
94 	return NULL;
95 }
96 
97 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
98 {
99 	int i, j;
100 	u8 octet;
101 
102 	for (i = 0; i < len; ++i) {
103 		octet = addr[i];
104 		for (j = 7; j >= 0; --j) {
105 			bits[i*8 + j] = octet & 1;
106 			octet >>= 1;
107 		}
108 	}
109 }
110 
111 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
112 					     struct qeth_ipaddr *addr)
113 {
114 	struct qeth_ipato_entry *ipatoe;
115 	u8 addr_bits[128] = {0, };
116 	u8 ipatoe_bits[128] = {0, };
117 	int rc = 0;
118 
119 	if (!card->ipato.enabled)
120 		return 0;
121 	if (addr->type != QETH_IP_TYPE_NORMAL)
122 		return 0;
123 
124 	qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
125 				  (addr->proto == QETH_PROT_IPV4)? 4:16);
126 	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
127 		if (addr->proto != ipatoe->proto)
128 			continue;
129 		qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
130 					  (ipatoe->proto == QETH_PROT_IPV4) ?
131 					  4 : 16);
132 		if (addr->proto == QETH_PROT_IPV4)
133 			rc = !memcmp(addr_bits, ipatoe_bits,
134 				     min(32, ipatoe->mask_bits));
135 		else
136 			rc = !memcmp(addr_bits, ipatoe_bits,
137 				     min(128, ipatoe->mask_bits));
138 		if (rc)
139 			break;
140 	}
141 	/* invert? */
142 	if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
143 		rc = !rc;
144 	else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
145 		rc = !rc;
146 
147 	return rc;
148 }
149 
150 static int qeth_l3_delete_ip(struct qeth_card *card,
151 			     struct qeth_ipaddr *tmp_addr)
152 {
153 	int rc = 0;
154 	struct qeth_ipaddr *addr;
155 
156 	if (tmp_addr->type == QETH_IP_TYPE_RXIP)
157 		QETH_CARD_TEXT(card, 2, "delrxip");
158 	else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
159 		QETH_CARD_TEXT(card, 2, "delvipa");
160 	else
161 		QETH_CARD_TEXT(card, 2, "delip");
162 
163 	if (tmp_addr->proto == QETH_PROT_IPV4)
164 		QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
165 	else {
166 		QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
167 		QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
168 	}
169 
170 	addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
171 	if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
172 		return -ENOENT;
173 
174 	addr->ref_counter--;
175 	if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
176 		return rc;
177 	if (addr->in_progress)
178 		return -EINPROGRESS;
179 
180 	if (qeth_card_hw_is_reachable(card))
181 		rc = qeth_l3_deregister_addr_entry(card, addr);
182 
183 	hash_del(&addr->hnode);
184 	kfree(addr);
185 
186 	return rc;
187 }
188 
189 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
190 {
191 	int rc = 0;
192 	struct qeth_ipaddr *addr;
193 	char buf[40];
194 
195 	if (tmp_addr->type == QETH_IP_TYPE_RXIP)
196 		QETH_CARD_TEXT(card, 2, "addrxip");
197 	else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
198 		QETH_CARD_TEXT(card, 2, "addvipa");
199 	else
200 		QETH_CARD_TEXT(card, 2, "addip");
201 
202 	if (tmp_addr->proto == QETH_PROT_IPV4)
203 		QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
204 	else {
205 		QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
206 		QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
207 	}
208 
209 	addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
210 	if (addr) {
211 		if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
212 			return -EADDRINUSE;
213 		if (qeth_l3_addr_match_all(addr, tmp_addr)) {
214 			addr->ref_counter++;
215 			return 0;
216 		}
217 		qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
218 					 buf);
219 		dev_warn(&card->gdev->dev,
220 			 "Registering IP address %s failed\n", buf);
221 		return -EADDRINUSE;
222 	} else {
223 		addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
224 		if (!addr)
225 			return -ENOMEM;
226 
227 		memcpy(addr, tmp_addr, sizeof(struct qeth_ipaddr));
228 		addr->ref_counter = 1;
229 
230 		if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
231 			QETH_CARD_TEXT(card, 2, "tkovaddr");
232 			addr->ipato = 1;
233 		}
234 		hash_add(card->ip_htable, &addr->hnode,
235 				qeth_l3_ipaddr_hash(addr));
236 
237 		if (!qeth_card_hw_is_reachable(card)) {
238 			addr->disp_flag = QETH_DISP_ADDR_ADD;
239 			return 0;
240 		}
241 
242 		/* qeth_l3_register_addr_entry can go to sleep
243 		 * if we add a IPV4 addr. It is caused by the reason
244 		 * that SETIP ipa cmd starts ARP staff for IPV4 addr.
245 		 * Thus we should unlock spinlock, and make a protection
246 		 * using in_progress variable to indicate that there is
247 		 * an hardware operation with this IPV4 address
248 		 */
249 		if (addr->proto == QETH_PROT_IPV4) {
250 			addr->in_progress = 1;
251 			spin_unlock_bh(&card->ip_lock);
252 			rc = qeth_l3_register_addr_entry(card, addr);
253 			spin_lock_bh(&card->ip_lock);
254 			addr->in_progress = 0;
255 		} else
256 			rc = qeth_l3_register_addr_entry(card, addr);
257 
258 		if (!rc || (rc == IPA_RC_DUPLICATE_IP_ADDRESS) ||
259 				(rc == IPA_RC_LAN_OFFLINE)) {
260 			addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
261 			if (addr->ref_counter < 1) {
262 				qeth_l3_deregister_addr_entry(card, addr);
263 				hash_del(&addr->hnode);
264 				kfree(addr);
265 			}
266 		} else {
267 			hash_del(&addr->hnode);
268 			kfree(addr);
269 		}
270 	}
271 	return rc;
272 }
273 
274 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
275 {
276 	struct qeth_ipaddr *addr;
277 	struct hlist_node *tmp;
278 	int i;
279 
280 	QETH_CARD_TEXT(card, 4, "clearip");
281 
282 	if (recover && card->options.sniffer)
283 		return;
284 
285 	spin_lock_bh(&card->ip_lock);
286 
287 	hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
288 		if (!recover) {
289 			hash_del(&addr->hnode);
290 			kfree(addr);
291 			continue;
292 		}
293 		addr->disp_flag = QETH_DISP_ADDR_ADD;
294 	}
295 
296 	spin_unlock_bh(&card->ip_lock);
297 
298 	spin_lock_bh(&card->mclock);
299 
300 	hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
301 		hash_del(&addr->hnode);
302 		kfree(addr);
303 	}
304 
305 	spin_unlock_bh(&card->mclock);
306 
307 
308 }
309 static void qeth_l3_recover_ip(struct qeth_card *card)
310 {
311 	struct qeth_ipaddr *addr;
312 	struct hlist_node *tmp;
313 	int i;
314 	int rc;
315 
316 	QETH_CARD_TEXT(card, 4, "recovrip");
317 
318 	spin_lock_bh(&card->ip_lock);
319 
320 	hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
321 		if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
322 			if (addr->proto == QETH_PROT_IPV4) {
323 				addr->in_progress = 1;
324 				spin_unlock_bh(&card->ip_lock);
325 				rc = qeth_l3_register_addr_entry(card, addr);
326 				spin_lock_bh(&card->ip_lock);
327 				addr->in_progress = 0;
328 			} else
329 				rc = qeth_l3_register_addr_entry(card, addr);
330 
331 			if (!rc) {
332 				addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
333 				if (addr->ref_counter < 1)
334 					qeth_l3_delete_ip(card, addr);
335 			} else {
336 				hash_del(&addr->hnode);
337 				kfree(addr);
338 			}
339 		}
340 	}
341 
342 	spin_unlock_bh(&card->ip_lock);
343 
344 }
345 
346 static int qeth_l3_send_setdelmc(struct qeth_card *card,
347 			struct qeth_ipaddr *addr, int ipacmd)
348 {
349 	int rc;
350 	struct qeth_cmd_buffer *iob;
351 	struct qeth_ipa_cmd *cmd;
352 
353 	QETH_CARD_TEXT(card, 4, "setdelmc");
354 
355 	iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
356 	if (!iob)
357 		return -ENOMEM;
358 	cmd = __ipa_cmd(iob);
359 	ether_addr_copy(cmd->data.setdelipm.mac, addr->mac);
360 	if (addr->proto == QETH_PROT_IPV6)
361 		memcpy(cmd->data.setdelipm.ip6, &addr->u.a6.addr,
362 		       sizeof(struct in6_addr));
363 	else
364 		memcpy(&cmd->data.setdelipm.ip4, &addr->u.a4.addr, 4);
365 
366 	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
367 
368 	return rc;
369 }
370 
371 static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
372 {
373 	int i, j;
374 	for (i = 0; i < 16; i++) {
375 		j = (len) - (i * 8);
376 		if (j >= 8)
377 			netmask[i] = 0xff;
378 		else if (j > 0)
379 			netmask[i] = (u8)(0xFF00 >> j);
380 		else
381 			netmask[i] = 0;
382 	}
383 }
384 
385 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
386 {
387 	switch (addr->type) {
388 	case QETH_IP_TYPE_RXIP:
389 		return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
390 	case QETH_IP_TYPE_VIPA:
391 		return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
392 			       QETH_IPA_DELIP_VIPA_FLAG;
393 	default:
394 		return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
395 	}
396 }
397 
398 static int qeth_l3_send_setdelip(struct qeth_card *card,
399 				 struct qeth_ipaddr *addr,
400 				 enum qeth_ipa_cmds ipacmd)
401 {
402 	struct qeth_cmd_buffer *iob;
403 	struct qeth_ipa_cmd *cmd;
404 	__u8 netmask[16];
405 	u32 flags;
406 
407 	QETH_CARD_TEXT(card, 4, "setdelip");
408 
409 	iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
410 	if (!iob)
411 		return -ENOMEM;
412 	cmd = __ipa_cmd(iob);
413 
414 	flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
415 	QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
416 
417 	if (addr->proto == QETH_PROT_IPV6) {
418 		memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
419 		       sizeof(struct in6_addr));
420 		qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
421 		memcpy(cmd->data.setdelip6.mask, netmask,
422 		       sizeof(struct in6_addr));
423 		cmd->data.setdelip6.flags = flags;
424 	} else {
425 		memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
426 		memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
427 		cmd->data.setdelip4.flags = flags;
428 	}
429 
430 	return qeth_send_ipa_cmd(card, iob, NULL, NULL);
431 }
432 
433 static int qeth_l3_send_setrouting(struct qeth_card *card,
434 	enum qeth_routing_types type, enum qeth_prot_versions prot)
435 {
436 	int rc;
437 	struct qeth_ipa_cmd *cmd;
438 	struct qeth_cmd_buffer *iob;
439 
440 	QETH_CARD_TEXT(card, 4, "setroutg");
441 	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETRTG, prot);
442 	if (!iob)
443 		return -ENOMEM;
444 	cmd = __ipa_cmd(iob);
445 	cmd->data.setrtg.type = (type);
446 	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
447 
448 	return rc;
449 }
450 
451 static int qeth_l3_correct_routing_type(struct qeth_card *card,
452 		enum qeth_routing_types *type, enum qeth_prot_versions prot)
453 {
454 	if (card->info.type == QETH_CARD_TYPE_IQD) {
455 		switch (*type) {
456 		case NO_ROUTER:
457 		case PRIMARY_CONNECTOR:
458 		case SECONDARY_CONNECTOR:
459 		case MULTICAST_ROUTER:
460 			return 0;
461 		default:
462 			goto out_inval;
463 		}
464 	} else {
465 		switch (*type) {
466 		case NO_ROUTER:
467 		case PRIMARY_ROUTER:
468 		case SECONDARY_ROUTER:
469 			return 0;
470 		case MULTICAST_ROUTER:
471 			if (qeth_is_ipafunc_supported(card, prot,
472 						      IPA_OSA_MC_ROUTER))
473 				return 0;
474 		default:
475 			goto out_inval;
476 		}
477 	}
478 out_inval:
479 	*type = NO_ROUTER;
480 	return -EINVAL;
481 }
482 
483 int qeth_l3_setrouting_v4(struct qeth_card *card)
484 {
485 	int rc;
486 
487 	QETH_CARD_TEXT(card, 3, "setrtg4");
488 
489 	rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
490 				  QETH_PROT_IPV4);
491 	if (rc)
492 		return rc;
493 
494 	rc = qeth_l3_send_setrouting(card, card->options.route4.type,
495 				  QETH_PROT_IPV4);
496 	if (rc) {
497 		card->options.route4.type = NO_ROUTER;
498 		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
499 			" on %s. Type set to 'no router'.\n", rc,
500 			QETH_CARD_IFNAME(card));
501 	}
502 	return rc;
503 }
504 
505 int qeth_l3_setrouting_v6(struct qeth_card *card)
506 {
507 	int rc = 0;
508 
509 	QETH_CARD_TEXT(card, 3, "setrtg6");
510 
511 	if (!qeth_is_supported(card, IPA_IPV6))
512 		return 0;
513 	rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
514 				  QETH_PROT_IPV6);
515 	if (rc)
516 		return rc;
517 
518 	rc = qeth_l3_send_setrouting(card, card->options.route6.type,
519 				  QETH_PROT_IPV6);
520 	if (rc) {
521 		card->options.route6.type = NO_ROUTER;
522 		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
523 			" on %s. Type set to 'no router'.\n", rc,
524 			QETH_CARD_IFNAME(card));
525 	}
526 	return rc;
527 }
528 
529 /*
530  * IP address takeover related functions
531  */
532 
533 /**
534  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
535  *
536  * Caller must hold ip_lock.
537  */
538 void qeth_l3_update_ipato(struct qeth_card *card)
539 {
540 	struct qeth_ipaddr *addr;
541 	unsigned int i;
542 
543 	hash_for_each(card->ip_htable, i, addr, hnode) {
544 		if (addr->type != QETH_IP_TYPE_NORMAL)
545 			continue;
546 		addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
547 	}
548 }
549 
550 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
551 {
552 	struct qeth_ipato_entry *ipatoe, *tmp;
553 
554 	spin_lock_bh(&card->ip_lock);
555 
556 	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
557 		list_del(&ipatoe->entry);
558 		kfree(ipatoe);
559 	}
560 
561 	qeth_l3_update_ipato(card);
562 	spin_unlock_bh(&card->ip_lock);
563 }
564 
565 int qeth_l3_add_ipato_entry(struct qeth_card *card,
566 				struct qeth_ipato_entry *new)
567 {
568 	struct qeth_ipato_entry *ipatoe;
569 	int rc = 0;
570 
571 	QETH_CARD_TEXT(card, 2, "addipato");
572 
573 	spin_lock_bh(&card->ip_lock);
574 
575 	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
576 		if (ipatoe->proto != new->proto)
577 			continue;
578 		if (!memcmp(ipatoe->addr, new->addr,
579 			    (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
580 		    (ipatoe->mask_bits == new->mask_bits)) {
581 			rc = -EEXIST;
582 			break;
583 		}
584 	}
585 
586 	if (!rc) {
587 		list_add_tail(&new->entry, &card->ipato.entries);
588 		qeth_l3_update_ipato(card);
589 	}
590 
591 	spin_unlock_bh(&card->ip_lock);
592 
593 	return rc;
594 }
595 
596 int qeth_l3_del_ipato_entry(struct qeth_card *card,
597 			    enum qeth_prot_versions proto, u8 *addr,
598 			    int mask_bits)
599 {
600 	struct qeth_ipato_entry *ipatoe, *tmp;
601 	int rc = -ENOENT;
602 
603 	QETH_CARD_TEXT(card, 2, "delipato");
604 
605 	spin_lock_bh(&card->ip_lock);
606 
607 	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
608 		if (ipatoe->proto != proto)
609 			continue;
610 		if (!memcmp(ipatoe->addr, addr,
611 			    (proto == QETH_PROT_IPV4)? 4:16) &&
612 		    (ipatoe->mask_bits == mask_bits)) {
613 			list_del(&ipatoe->entry);
614 			qeth_l3_update_ipato(card);
615 			kfree(ipatoe);
616 			rc = 0;
617 		}
618 	}
619 
620 	spin_unlock_bh(&card->ip_lock);
621 	return rc;
622 }
623 
624 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
625 			     enum qeth_ip_types type,
626 			     enum qeth_prot_versions proto)
627 {
628 	struct qeth_ipaddr addr;
629 	int rc;
630 
631 	qeth_l3_init_ipaddr(&addr, type, proto);
632 	if (proto == QETH_PROT_IPV4)
633 		memcpy(&addr.u.a4.addr, ip, 4);
634 	else
635 		memcpy(&addr.u.a6.addr, ip, 16);
636 
637 	spin_lock_bh(&card->ip_lock);
638 	rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
639 	spin_unlock_bh(&card->ip_lock);
640 	return rc;
641 }
642 
643 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
644 {
645 	struct qeth_ipaddr addr;
646 	int rc, i;
647 
648 	qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
649 	addr.u.a6.addr.s6_addr[0] = 0xfe;
650 	addr.u.a6.addr.s6_addr[1] = 0x80;
651 	for (i = 0; i < 8; i++)
652 		addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
653 
654 	spin_lock_bh(&card->ip_lock);
655 	rc = add ? qeth_l3_add_ip(card, &addr) : qeth_l3_delete_ip(card, &addr);
656 	spin_unlock_bh(&card->ip_lock);
657 	return rc;
658 }
659 
660 static int qeth_l3_register_addr_entry(struct qeth_card *card,
661 				struct qeth_ipaddr *addr)
662 {
663 	char buf[50];
664 	int rc = 0;
665 	int cnt = 3;
666 
667 
668 	if (addr->proto == QETH_PROT_IPV4) {
669 		QETH_CARD_TEXT(card, 2, "setaddr4");
670 		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
671 	} else if (addr->proto == QETH_PROT_IPV6) {
672 		QETH_CARD_TEXT(card, 2, "setaddr6");
673 		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
674 		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
675 	} else {
676 		QETH_CARD_TEXT(card, 2, "setaddr?");
677 		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
678 	}
679 	do {
680 		if (addr->is_multicast)
681 			rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
682 		else
683 			rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
684 		if (rc)
685 			QETH_CARD_TEXT(card, 2, "failed");
686 	} while ((--cnt > 0) && rc);
687 	if (rc) {
688 		QETH_CARD_TEXT(card, 2, "FAILED");
689 		qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
690 		dev_warn(&card->gdev->dev,
691 			"Registering IP address %s failed\n", buf);
692 	}
693 	return rc;
694 }
695 
696 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
697 						struct qeth_ipaddr *addr)
698 {
699 	int rc = 0;
700 
701 	if (addr->proto == QETH_PROT_IPV4) {
702 		QETH_CARD_TEXT(card, 2, "deladdr4");
703 		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
704 	} else if (addr->proto == QETH_PROT_IPV6) {
705 		QETH_CARD_TEXT(card, 2, "deladdr6");
706 		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
707 		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
708 	} else {
709 		QETH_CARD_TEXT(card, 2, "deladdr?");
710 		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
711 	}
712 	if (addr->is_multicast)
713 		rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
714 	else
715 		rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
716 	if (rc)
717 		QETH_CARD_TEXT(card, 2, "failed");
718 
719 	return rc;
720 }
721 
722 static int qeth_l3_setadapter_parms(struct qeth_card *card)
723 {
724 	int rc = 0;
725 
726 	QETH_DBF_TEXT(SETUP, 2, "setadprm");
727 
728 	if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
729 		rc = qeth_setadpparms_change_macaddr(card);
730 		if (rc)
731 			dev_warn(&card->gdev->dev, "Reading the adapter MAC"
732 				" address failed\n");
733 	}
734 
735 	return rc;
736 }
737 
738 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
739 {
740 	int rc;
741 
742 	QETH_CARD_TEXT(card, 3, "ipaarp");
743 
744 	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
745 		dev_info(&card->gdev->dev,
746 			"ARP processing not supported on %s!\n",
747 			QETH_CARD_IFNAME(card));
748 		return 0;
749 	}
750 	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
751 					  IPA_CMD_ASS_START, 0);
752 	if (rc) {
753 		dev_warn(&card->gdev->dev,
754 			"Starting ARP processing support for %s failed\n",
755 			QETH_CARD_IFNAME(card));
756 	}
757 	return rc;
758 }
759 
760 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
761 {
762 	int rc;
763 
764 	QETH_CARD_TEXT(card, 3, "stsrcmac");
765 
766 	if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
767 		dev_info(&card->gdev->dev,
768 			"Inbound source MAC-address not supported on %s\n",
769 			QETH_CARD_IFNAME(card));
770 		return -EOPNOTSUPP;
771 	}
772 
773 	rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
774 					  IPA_CMD_ASS_START, 0);
775 	if (rc)
776 		dev_warn(&card->gdev->dev,
777 			"Starting source MAC-address support for %s failed\n",
778 			QETH_CARD_IFNAME(card));
779 	return rc;
780 }
781 
782 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
783 {
784 	int rc = 0;
785 
786 	QETH_CARD_TEXT(card, 3, "strtvlan");
787 
788 	if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
789 		dev_info(&card->gdev->dev,
790 			"VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
791 		return -EOPNOTSUPP;
792 	}
793 
794 	rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
795 					  IPA_CMD_ASS_START, 0);
796 	if (rc) {
797 		dev_warn(&card->gdev->dev,
798 			"Starting VLAN support for %s failed\n",
799 			QETH_CARD_IFNAME(card));
800 	} else {
801 		dev_info(&card->gdev->dev, "VLAN enabled\n");
802 	}
803 	return rc;
804 }
805 
806 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
807 {
808 	int rc;
809 
810 	QETH_CARD_TEXT(card, 3, "stmcast");
811 
812 	if (!qeth_is_supported(card, IPA_MULTICASTING)) {
813 		dev_info(&card->gdev->dev,
814 			"Multicast not supported on %s\n",
815 			QETH_CARD_IFNAME(card));
816 		return -EOPNOTSUPP;
817 	}
818 
819 	rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
820 					  IPA_CMD_ASS_START, 0);
821 	if (rc) {
822 		dev_warn(&card->gdev->dev,
823 			"Starting multicast support for %s failed\n",
824 			QETH_CARD_IFNAME(card));
825 	} else {
826 		dev_info(&card->gdev->dev, "Multicast enabled\n");
827 		card->dev->flags |= IFF_MULTICAST;
828 	}
829 	return rc;
830 }
831 
832 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
833 {
834 	int rc;
835 
836 	QETH_CARD_TEXT(card, 3, "softipv6");
837 
838 	if (card->info.type == QETH_CARD_TYPE_IQD)
839 		goto out;
840 
841 	rc = qeth_send_simple_setassparms(card, IPA_IPV6,
842 					  IPA_CMD_ASS_START, 3);
843 	if (rc) {
844 		dev_err(&card->gdev->dev,
845 			"Activating IPv6 support for %s failed\n",
846 			QETH_CARD_IFNAME(card));
847 		return rc;
848 	}
849 	rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6,
850 					     IPA_CMD_ASS_START, 0);
851 	if (rc) {
852 		dev_err(&card->gdev->dev,
853 			"Activating IPv6 support for %s failed\n",
854 			 QETH_CARD_IFNAME(card));
855 		return rc;
856 	}
857 	rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
858 					     IPA_CMD_ASS_START, 0);
859 	if (rc) {
860 		dev_warn(&card->gdev->dev,
861 			"Enabling the passthrough mode for %s failed\n",
862 			QETH_CARD_IFNAME(card));
863 		return rc;
864 	}
865 out:
866 	dev_info(&card->gdev->dev, "IPV6 enabled\n");
867 	return 0;
868 }
869 
870 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
871 {
872 	QETH_CARD_TEXT(card, 3, "strtipv6");
873 
874 	if (!qeth_is_supported(card, IPA_IPV6)) {
875 		dev_info(&card->gdev->dev,
876 			"IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
877 		return 0;
878 	}
879 	return qeth_l3_softsetup_ipv6(card);
880 }
881 
882 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
883 {
884 	int rc;
885 
886 	QETH_CARD_TEXT(card, 3, "stbrdcst");
887 	card->info.broadcast_capable = 0;
888 	if (!qeth_is_supported(card, IPA_FILTERING)) {
889 		dev_info(&card->gdev->dev,
890 			"Broadcast not supported on %s\n",
891 			QETH_CARD_IFNAME(card));
892 		rc = -EOPNOTSUPP;
893 		goto out;
894 	}
895 	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
896 					  IPA_CMD_ASS_START, 0);
897 	if (rc) {
898 		dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
899 			"%s failed\n", QETH_CARD_IFNAME(card));
900 		goto out;
901 	}
902 
903 	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
904 					  IPA_CMD_ASS_CONFIGURE, 1);
905 	if (rc) {
906 		dev_warn(&card->gdev->dev,
907 			"Setting up broadcast filtering for %s failed\n",
908 			QETH_CARD_IFNAME(card));
909 		goto out;
910 	}
911 	card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
912 	dev_info(&card->gdev->dev, "Broadcast enabled\n");
913 	rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
914 					  IPA_CMD_ASS_ENABLE, 1);
915 	if (rc) {
916 		dev_warn(&card->gdev->dev, "Setting up broadcast echo "
917 			"filtering for %s failed\n", QETH_CARD_IFNAME(card));
918 		goto out;
919 	}
920 	card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
921 out:
922 	if (card->info.broadcast_capable)
923 		card->dev->flags |= IFF_BROADCAST;
924 	else
925 		card->dev->flags &= ~IFF_BROADCAST;
926 	return rc;
927 }
928 
929 static int qeth_l3_start_ipassists(struct qeth_card *card)
930 {
931 	QETH_CARD_TEXT(card, 3, "strtipas");
932 
933 	if (qeth_set_access_ctrl_online(card, 0))
934 		return -EIO;
935 	qeth_l3_start_ipa_arp_processing(card);	/* go on*/
936 	qeth_l3_start_ipa_source_mac(card);	/* go on*/
937 	qeth_l3_start_ipa_vlan(card);		/* go on*/
938 	qeth_l3_start_ipa_multicast(card);		/* go on*/
939 	qeth_l3_start_ipa_ipv6(card);		/* go on*/
940 	qeth_l3_start_ipa_broadcast(card);		/* go on*/
941 	return 0;
942 }
943 
944 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
945 		struct qeth_reply *reply, unsigned long data)
946 {
947 	struct qeth_ipa_cmd *cmd;
948 
949 	cmd = (struct qeth_ipa_cmd *) data;
950 	if (cmd->hdr.return_code == 0)
951 		ether_addr_copy(card->dev->dev_addr,
952 				cmd->data.create_destroy_addr.unique_id);
953 	else
954 		eth_random_addr(card->dev->dev_addr);
955 
956 	return 0;
957 }
958 
959 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
960 {
961 	int rc = 0;
962 	struct qeth_cmd_buffer *iob;
963 	struct qeth_ipa_cmd *cmd;
964 
965 	QETH_DBF_TEXT(SETUP, 2, "hsrmac");
966 
967 	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
968 				     QETH_PROT_IPV6);
969 	if (!iob)
970 		return -ENOMEM;
971 	cmd = __ipa_cmd(iob);
972 	*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
973 			card->info.unique_id;
974 
975 	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
976 				NULL);
977 	return rc;
978 }
979 
980 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
981 		struct qeth_reply *reply, unsigned long data)
982 {
983 	struct qeth_ipa_cmd *cmd;
984 
985 	cmd = (struct qeth_ipa_cmd *) data;
986 	if (cmd->hdr.return_code == 0)
987 		card->info.unique_id = *((__u16 *)
988 				&cmd->data.create_destroy_addr.unique_id[6]);
989 	else {
990 		card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
991 					UNIQUE_ID_NOT_BY_CARD;
992 		dev_warn(&card->gdev->dev, "The network adapter failed to "
993 			"generate a unique ID\n");
994 	}
995 	return 0;
996 }
997 
998 static int qeth_l3_get_unique_id(struct qeth_card *card)
999 {
1000 	int rc = 0;
1001 	struct qeth_cmd_buffer *iob;
1002 	struct qeth_ipa_cmd *cmd;
1003 
1004 	QETH_DBF_TEXT(SETUP, 2, "guniqeid");
1005 
1006 	if (!qeth_is_supported(card, IPA_IPV6)) {
1007 		card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1008 					UNIQUE_ID_NOT_BY_CARD;
1009 		return 0;
1010 	}
1011 
1012 	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
1013 				     QETH_PROT_IPV6);
1014 	if (!iob)
1015 		return -ENOMEM;
1016 	cmd = __ipa_cmd(iob);
1017 	*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
1018 			card->info.unique_id;
1019 
1020 	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
1021 	return rc;
1022 }
1023 
1024 static int
1025 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
1026 			    unsigned long data)
1027 {
1028 	struct qeth_ipa_cmd	   *cmd;
1029 	__u16 rc;
1030 
1031 	QETH_DBF_TEXT(SETUP, 2, "diastrcb");
1032 
1033 	cmd = (struct qeth_ipa_cmd *)data;
1034 	rc = cmd->hdr.return_code;
1035 	if (rc)
1036 		QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
1037 	switch (cmd->data.diagass.action) {
1038 	case QETH_DIAGS_CMD_TRACE_QUERY:
1039 		break;
1040 	case QETH_DIAGS_CMD_TRACE_DISABLE:
1041 		switch (rc) {
1042 		case 0:
1043 		case IPA_RC_INVALID_SUBCMD:
1044 			card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1045 			dev_info(&card->gdev->dev, "The HiperSockets network "
1046 				"traffic analyzer is deactivated\n");
1047 			break;
1048 		default:
1049 			break;
1050 		}
1051 		break;
1052 	case QETH_DIAGS_CMD_TRACE_ENABLE:
1053 		switch (rc) {
1054 		case 0:
1055 			card->info.promisc_mode = SET_PROMISC_MODE_ON;
1056 			dev_info(&card->gdev->dev, "The HiperSockets network "
1057 				"traffic analyzer is activated\n");
1058 			break;
1059 		case IPA_RC_HARDWARE_AUTH_ERROR:
1060 			dev_warn(&card->gdev->dev, "The device is not "
1061 				"authorized to run as a HiperSockets network "
1062 				"traffic analyzer\n");
1063 			break;
1064 		case IPA_RC_TRACE_ALREADY_ACTIVE:
1065 			dev_warn(&card->gdev->dev, "A HiperSockets "
1066 				"network traffic analyzer is already "
1067 				"active in the HiperSockets LAN\n");
1068 			break;
1069 		default:
1070 			break;
1071 		}
1072 		break;
1073 	default:
1074 		QETH_DBF_MESSAGE(2, "Unknown sniffer action (0x%04x) on %s\n",
1075 			cmd->data.diagass.action, QETH_CARD_IFNAME(card));
1076 	}
1077 
1078 	return 0;
1079 }
1080 
1081 static int
1082 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1083 {
1084 	struct qeth_cmd_buffer *iob;
1085 	struct qeth_ipa_cmd    *cmd;
1086 
1087 	QETH_DBF_TEXT(SETUP, 2, "diagtrac");
1088 
1089 	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
1090 	if (!iob)
1091 		return -ENOMEM;
1092 	cmd = __ipa_cmd(iob);
1093 	cmd->data.diagass.subcmd_len = 16;
1094 	cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRACE;
1095 	cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1096 	cmd->data.diagass.action = diags_cmd;
1097 	return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1098 }
1099 
1100 static void
1101 qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
1102 {
1103 	struct ip_mc_list *im4;
1104 	struct qeth_ipaddr *tmp, *ipm;
1105 
1106 	QETH_CARD_TEXT(card, 4, "addmc");
1107 
1108 	tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1109 	if (!tmp)
1110 		return;
1111 
1112 	for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1113 	     im4 = rcu_dereference(im4->next_rcu)) {
1114 		ip_eth_mc_map(im4->multiaddr, tmp->mac);
1115 		tmp->u.a4.addr = be32_to_cpu(im4->multiaddr);
1116 		tmp->is_multicast = 1;
1117 
1118 		ipm = qeth_l3_find_addr_by_ip(card, tmp);
1119 		if (ipm) {
1120 			/* for mcast, by-IP match means full match */
1121 			ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1122 		} else {
1123 			ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1124 			if (!ipm)
1125 				continue;
1126 			ether_addr_copy(ipm->mac, tmp->mac);
1127 			ipm->u.a4.addr = be32_to_cpu(im4->multiaddr);
1128 			ipm->is_multicast = 1;
1129 			ipm->disp_flag = QETH_DISP_ADDR_ADD;
1130 			hash_add(card->ip_mc_htable,
1131 					&ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1132 		}
1133 	}
1134 
1135 	kfree(tmp);
1136 }
1137 
1138 /* called with rcu_read_lock */
1139 static void qeth_l3_add_vlan_mc(struct qeth_card *card)
1140 {
1141 	struct in_device *in_dev;
1142 	u16 vid;
1143 
1144 	QETH_CARD_TEXT(card, 4, "addmcvl");
1145 
1146 	if (!qeth_is_supported(card, IPA_FULL_VLAN))
1147 		return;
1148 
1149 	for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1150 		struct net_device *netdev;
1151 
1152 		netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1153 					      vid);
1154 		if (netdev == NULL ||
1155 		    !(netdev->flags & IFF_UP))
1156 			continue;
1157 		in_dev = __in_dev_get_rcu(netdev);
1158 		if (!in_dev)
1159 			continue;
1160 		qeth_l3_add_mc_to_hash(card, in_dev);
1161 	}
1162 }
1163 
1164 static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
1165 {
1166 	struct in_device *in4_dev;
1167 
1168 	QETH_CARD_TEXT(card, 4, "chkmcv4");
1169 
1170 	rcu_read_lock();
1171 	in4_dev = __in_dev_get_rcu(card->dev);
1172 	if (in4_dev == NULL)
1173 		goto unlock;
1174 	qeth_l3_add_mc_to_hash(card, in4_dev);
1175 	qeth_l3_add_vlan_mc(card);
1176 unlock:
1177 	rcu_read_unlock();
1178 }
1179 
1180 static void qeth_l3_add_mc6_to_hash(struct qeth_card *card,
1181 				    struct inet6_dev *in6_dev)
1182 {
1183 	struct qeth_ipaddr *ipm;
1184 	struct ifmcaddr6 *im6;
1185 	struct qeth_ipaddr *tmp;
1186 
1187 	QETH_CARD_TEXT(card, 4, "addmc6");
1188 
1189 	tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1190 	if (!tmp)
1191 		return;
1192 
1193 	for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1194 		ipv6_eth_mc_map(&im6->mca_addr, tmp->mac);
1195 		memcpy(&tmp->u.a6.addr, &im6->mca_addr.s6_addr,
1196 		       sizeof(struct in6_addr));
1197 		tmp->is_multicast = 1;
1198 
1199 		ipm = qeth_l3_find_addr_by_ip(card, tmp);
1200 		if (ipm) {
1201 			/* for mcast, by-IP match means full match */
1202 			ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1203 			continue;
1204 		}
1205 
1206 		ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1207 		if (!ipm)
1208 			continue;
1209 
1210 		ether_addr_copy(ipm->mac, tmp->mac);
1211 		memcpy(&ipm->u.a6.addr, &im6->mca_addr.s6_addr,
1212 		       sizeof(struct in6_addr));
1213 		ipm->is_multicast = 1;
1214 		ipm->disp_flag = QETH_DISP_ADDR_ADD;
1215 		hash_add(card->ip_mc_htable,
1216 				&ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1217 
1218 	}
1219 	kfree(tmp);
1220 }
1221 
1222 /* called with rcu_read_lock */
1223 static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
1224 {
1225 	struct inet6_dev *in_dev;
1226 	u16 vid;
1227 
1228 	QETH_CARD_TEXT(card, 4, "admc6vl");
1229 
1230 	if (!qeth_is_supported(card, IPA_FULL_VLAN))
1231 		return;
1232 
1233 	for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1234 		struct net_device *netdev;
1235 
1236 		netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1237 					      vid);
1238 		if (netdev == NULL ||
1239 		    !(netdev->flags & IFF_UP))
1240 			continue;
1241 		in_dev = in6_dev_get(netdev);
1242 		if (!in_dev)
1243 			continue;
1244 		read_lock_bh(&in_dev->lock);
1245 		qeth_l3_add_mc6_to_hash(card, in_dev);
1246 		read_unlock_bh(&in_dev->lock);
1247 		in6_dev_put(in_dev);
1248 	}
1249 }
1250 
1251 static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
1252 {
1253 	struct inet6_dev *in6_dev;
1254 
1255 	QETH_CARD_TEXT(card, 4, "chkmcv6");
1256 
1257 	if (!qeth_is_supported(card, IPA_IPV6))
1258 		return ;
1259 	in6_dev = in6_dev_get(card->dev);
1260 	if (!in6_dev)
1261 		return;
1262 
1263 	rcu_read_lock();
1264 	read_lock_bh(&in6_dev->lock);
1265 	qeth_l3_add_mc6_to_hash(card, in6_dev);
1266 	qeth_l3_add_vlan_mc6(card);
1267 	read_unlock_bh(&in6_dev->lock);
1268 	rcu_read_unlock();
1269 	in6_dev_put(in6_dev);
1270 }
1271 
1272 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1273 				   __be16 proto, u16 vid)
1274 {
1275 	struct qeth_card *card = dev->ml_priv;
1276 
1277 	set_bit(vid, card->active_vlans);
1278 	return 0;
1279 }
1280 
1281 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1282 				    __be16 proto, u16 vid)
1283 {
1284 	struct qeth_card *card = dev->ml_priv;
1285 
1286 	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1287 
1288 	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
1289 		QETH_CARD_TEXT(card, 3, "kidREC");
1290 		return 0;
1291 	}
1292 	clear_bit(vid, card->active_vlans);
1293 	qeth_l3_set_rx_mode(dev);
1294 	return 0;
1295 }
1296 
1297 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
1298 				struct qeth_hdr *hdr)
1299 {
1300 	if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
1301 		u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
1302 								 ETH_P_IP;
1303 		unsigned char tg_addr[ETH_ALEN];
1304 
1305 		skb_reset_network_header(skb);
1306 		switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
1307 		case QETH_CAST_MULTICAST:
1308 			if (prot == ETH_P_IP)
1309 				ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
1310 			else
1311 				ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
1312 
1313 			card->stats.multicast++;
1314 			break;
1315 		case QETH_CAST_BROADCAST:
1316 			ether_addr_copy(tg_addr, card->dev->broadcast);
1317 			card->stats.multicast++;
1318 			break;
1319 		default:
1320 			if (card->options.sniffer)
1321 				skb->pkt_type = PACKET_OTHERHOST;
1322 			ether_addr_copy(tg_addr, card->dev->dev_addr);
1323 		}
1324 
1325 		if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
1326 			card->dev->header_ops->create(skb, card->dev, prot,
1327 				tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
1328 				skb->len);
1329 		else
1330 			card->dev->header_ops->create(skb, card->dev, prot,
1331 				tg_addr, "FAKELL", skb->len);
1332 	}
1333 
1334 	skb->protocol = eth_type_trans(skb, card->dev);
1335 
1336 	/* copy VLAN tag from hdr into skb */
1337 	if (!card->options.sniffer &&
1338 	    (hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
1339 				      QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
1340 		u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
1341 				hdr->hdr.l3.vlan_id :
1342 				hdr->hdr.l3.next_hop.rx.vlan_id;
1343 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
1344 	}
1345 
1346 	qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
1347 }
1348 
1349 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
1350 				int budget, int *done)
1351 {
1352 	int work_done = 0;
1353 	struct sk_buff *skb;
1354 	struct qeth_hdr *hdr;
1355 	unsigned int len;
1356 	__u16 magic;
1357 
1358 	*done = 0;
1359 	WARN_ON_ONCE(!budget);
1360 	while (budget) {
1361 		skb = qeth_core_get_next_skb(card,
1362 			&card->qdio.in_q->bufs[card->rx.b_index],
1363 			&card->rx.b_element, &card->rx.e_offset, &hdr);
1364 		if (!skb) {
1365 			*done = 1;
1366 			break;
1367 		}
1368 		switch (hdr->hdr.l3.id) {
1369 		case QETH_HEADER_TYPE_LAYER3:
1370 			magic = *(__u16 *)skb->data;
1371 			if ((card->info.type == QETH_CARD_TYPE_IQD) &&
1372 			    (magic == ETH_P_AF_IUCV)) {
1373 				skb->protocol = cpu_to_be16(ETH_P_AF_IUCV);
1374 				len = skb->len;
1375 				card->dev->header_ops->create(skb, card->dev, 0,
1376 					card->dev->dev_addr, "FAKELL", len);
1377 				skb_reset_mac_header(skb);
1378 				netif_receive_skb(skb);
1379 			} else {
1380 				qeth_l3_rebuild_skb(card, skb, hdr);
1381 				len = skb->len;
1382 				napi_gro_receive(&card->napi, skb);
1383 			}
1384 			break;
1385 		case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
1386 			skb->protocol = eth_type_trans(skb, skb->dev);
1387 			len = skb->len;
1388 			netif_receive_skb(skb);
1389 			break;
1390 		default:
1391 			dev_kfree_skb_any(skb);
1392 			QETH_CARD_TEXT(card, 3, "inbunkno");
1393 			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
1394 			continue;
1395 		}
1396 		work_done++;
1397 		budget--;
1398 		card->stats.rx_packets++;
1399 		card->stats.rx_bytes += len;
1400 	}
1401 	return work_done;
1402 }
1403 
1404 static void qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
1405 {
1406 	QETH_DBF_TEXT(SETUP, 2, "stopcard");
1407 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1408 
1409 	qeth_set_allowed_threads(card, 0, 1);
1410 	if (card->options.sniffer &&
1411 	    (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1412 		qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1413 	if (card->read.state == CH_STATE_UP &&
1414 	    card->write.state == CH_STATE_UP &&
1415 	    (card->state == CARD_STATE_UP)) {
1416 		if (recovery_mode)
1417 			qeth_l3_stop(card->dev);
1418 		else {
1419 			rtnl_lock();
1420 			dev_close(card->dev);
1421 			rtnl_unlock();
1422 		}
1423 		card->state = CARD_STATE_SOFTSETUP;
1424 	}
1425 	if (card->state == CARD_STATE_SOFTSETUP) {
1426 		qeth_l3_clear_ip_htable(card, 1);
1427 		qeth_clear_ipacmd_list(card);
1428 		card->state = CARD_STATE_HARDSETUP;
1429 	}
1430 	if (card->state == CARD_STATE_HARDSETUP) {
1431 		qeth_qdio_clear_card(card, 0);
1432 		qeth_clear_qdio_buffers(card);
1433 		qeth_clear_working_pool_list(card);
1434 		card->state = CARD_STATE_DOWN;
1435 	}
1436 	if (card->state == CARD_STATE_DOWN) {
1437 		qeth_clear_cmd_buffers(&card->read);
1438 		qeth_clear_cmd_buffers(&card->write);
1439 	}
1440 }
1441 
1442 /*
1443  * test for and Switch promiscuous mode (on or off)
1444  *  either for guestlan or HiperSocket Sniffer
1445  */
1446 static void
1447 qeth_l3_handle_promisc_mode(struct qeth_card *card)
1448 {
1449 	struct net_device *dev = card->dev;
1450 
1451 	if (((dev->flags & IFF_PROMISC) &&
1452 	     (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
1453 	    (!(dev->flags & IFF_PROMISC) &&
1454 	     (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
1455 		return;
1456 
1457 	if (card->info.guestlan) {		/* Guestlan trace */
1458 		if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1459 			qeth_setadp_promisc_mode(card);
1460 	} else if (card->options.sniffer &&	/* HiperSockets trace */
1461 		   qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1462 		if (dev->flags & IFF_PROMISC) {
1463 			QETH_CARD_TEXT(card, 3, "+promisc");
1464 			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1465 		} else {
1466 			QETH_CARD_TEXT(card, 3, "-promisc");
1467 			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1468 		}
1469 	}
1470 }
1471 
1472 static void qeth_l3_set_rx_mode(struct net_device *dev)
1473 {
1474 	struct qeth_card *card = dev->ml_priv;
1475 	struct qeth_ipaddr *addr;
1476 	struct hlist_node *tmp;
1477 	int i, rc;
1478 
1479 	QETH_CARD_TEXT(card, 3, "setmulti");
1480 	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
1481 	    (card->state != CARD_STATE_UP))
1482 		return;
1483 	if (!card->options.sniffer) {
1484 		spin_lock_bh(&card->mclock);
1485 
1486 		qeth_l3_add_multicast_ipv4(card);
1487 		qeth_l3_add_multicast_ipv6(card);
1488 
1489 		hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1490 			switch (addr->disp_flag) {
1491 			case QETH_DISP_ADDR_DELETE:
1492 				rc = qeth_l3_deregister_addr_entry(card, addr);
1493 				if (!rc || rc == IPA_RC_MC_ADDR_NOT_FOUND) {
1494 					hash_del(&addr->hnode);
1495 					kfree(addr);
1496 				}
1497 				break;
1498 			case QETH_DISP_ADDR_ADD:
1499 				rc = qeth_l3_register_addr_entry(card, addr);
1500 				if (rc && rc != IPA_RC_LAN_OFFLINE) {
1501 					hash_del(&addr->hnode);
1502 					kfree(addr);
1503 					break;
1504 				}
1505 				addr->ref_counter = 1;
1506 				/* fall through */
1507 			default:
1508 				/* for next call to set_rx_mode(): */
1509 				addr->disp_flag = QETH_DISP_ADDR_DELETE;
1510 			}
1511 		}
1512 
1513 		spin_unlock_bh(&card->mclock);
1514 
1515 		if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1516 			return;
1517 	}
1518 	qeth_l3_handle_promisc_mode(card);
1519 }
1520 
1521 static const char *qeth_l3_arp_get_error_cause(int *rc)
1522 {
1523 	switch (*rc) {
1524 	case QETH_IPA_ARP_RC_FAILED:
1525 		*rc = -EIO;
1526 		return "operation failed";
1527 	case QETH_IPA_ARP_RC_NOTSUPP:
1528 		*rc = -EOPNOTSUPP;
1529 		return "operation not supported";
1530 	case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1531 		*rc = -EINVAL;
1532 		return "argument out of range";
1533 	case QETH_IPA_ARP_RC_Q_NOTSUPP:
1534 		*rc = -EOPNOTSUPP;
1535 		return "query operation not supported";
1536 	case QETH_IPA_ARP_RC_Q_NO_DATA:
1537 		*rc = -ENOENT;
1538 		return "no query data available";
1539 	default:
1540 		return "unknown error";
1541 	}
1542 }
1543 
1544 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1545 {
1546 	int tmp;
1547 	int rc;
1548 
1549 	QETH_CARD_TEXT(card, 3, "arpstnoe");
1550 
1551 	/*
1552 	 * currently GuestLAN only supports the ARP assist function
1553 	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1554 	 * thus we say EOPNOTSUPP for this ARP function
1555 	 */
1556 	if (card->info.guestlan)
1557 		return -EOPNOTSUPP;
1558 	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1559 		return -EOPNOTSUPP;
1560 	}
1561 	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
1562 					  IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1563 					  no_entries);
1564 	if (rc) {
1565 		tmp = rc;
1566 		QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on "
1567 			"%s: %s (0x%x/%d)\n", QETH_CARD_IFNAME(card),
1568 			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
1569 	}
1570 	return rc;
1571 }
1572 
1573 static __u32 get_arp_entry_size(struct qeth_card *card,
1574 			struct qeth_arp_query_data *qdata,
1575 			struct qeth_arp_entrytype *type, __u8 strip_entries)
1576 {
1577 	__u32 rc;
1578 	__u8 is_hsi;
1579 
1580 	is_hsi = qdata->reply_bits == 5;
1581 	if (type->ip == QETHARP_IP_ADDR_V4) {
1582 		QETH_CARD_TEXT(card, 4, "arpev4");
1583 		if (strip_entries) {
1584 			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1585 				sizeof(struct qeth_arp_qi_entry7_short);
1586 		} else {
1587 			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1588 				sizeof(struct qeth_arp_qi_entry7);
1589 		}
1590 	} else if (type->ip == QETHARP_IP_ADDR_V6) {
1591 		QETH_CARD_TEXT(card, 4, "arpev6");
1592 		if (strip_entries) {
1593 			rc = is_hsi ?
1594 				sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1595 				sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1596 		} else {
1597 			rc = is_hsi ?
1598 				sizeof(struct qeth_arp_qi_entry5_ipv6) :
1599 				sizeof(struct qeth_arp_qi_entry7_ipv6);
1600 		}
1601 	} else {
1602 		QETH_CARD_TEXT(card, 4, "arpinv");
1603 		rc = 0;
1604 	}
1605 
1606 	return rc;
1607 }
1608 
1609 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1610 {
1611 	return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1612 		(type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1613 }
1614 
1615 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1616 		struct qeth_reply *reply, unsigned long data)
1617 {
1618 	struct qeth_ipa_cmd *cmd;
1619 	struct qeth_arp_query_data *qdata;
1620 	struct qeth_arp_query_info *qinfo;
1621 	int i;
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 0;
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 0;
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", -ENOMEM);
1669 			cmd->hdr.return_code = IPA_RC_ENOMEM;
1670 			goto out_error;
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 out_error:
1694 	i = 0;
1695 	memcpy(qinfo->udata, &i, 4);
1696 	return 0;
1697 }
1698 
1699 static int qeth_l3_send_ipa_arp_cmd(struct qeth_card *card,
1700 		struct qeth_cmd_buffer *iob, int len,
1701 		int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
1702 			unsigned long),
1703 		void *reply_param)
1704 {
1705 	QETH_CARD_TEXT(card, 4, "sendarp");
1706 
1707 	memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
1708 	memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
1709 	       &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
1710 	return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
1711 				      reply_cb, reply_param);
1712 }
1713 
1714 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1715 	enum qeth_prot_versions prot,
1716 	struct qeth_arp_query_info *qinfo)
1717 {
1718 	struct qeth_cmd_buffer *iob;
1719 	struct qeth_ipa_cmd *cmd;
1720 	int tmp;
1721 	int rc;
1722 
1723 	QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1724 
1725 	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1726 				       IPA_CMD_ASS_ARP_QUERY_INFO,
1727 				       sizeof(struct qeth_arp_query_data)
1728 						- sizeof(char),
1729 				       prot);
1730 	if (!iob)
1731 		return -ENOMEM;
1732 	cmd = __ipa_cmd(iob);
1733 	cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1734 	cmd->data.setassparms.data.query_arp.reply_bits = 0;
1735 	cmd->data.setassparms.data.query_arp.no_entries = 0;
1736 	rc = qeth_l3_send_ipa_arp_cmd(card, iob,
1737 			   QETH_SETASS_BASE_LEN+QETH_ARP_CMD_LEN,
1738 			   qeth_l3_arp_query_cb, (void *)qinfo);
1739 	if (rc) {
1740 		tmp = rc;
1741 		QETH_DBF_MESSAGE(2,
1742 			"Error while querying ARP cache on %s: %s "
1743 			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
1744 			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
1745 	}
1746 
1747 	return rc;
1748 }
1749 
1750 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1751 {
1752 	struct qeth_arp_query_info qinfo = {0, };
1753 	int rc;
1754 
1755 	QETH_CARD_TEXT(card, 3, "arpquery");
1756 
1757 	if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1758 			       IPA_ARP_PROCESSING)) {
1759 		QETH_CARD_TEXT(card, 3, "arpqnsup");
1760 		rc = -EOPNOTSUPP;
1761 		goto out;
1762 	}
1763 	/* get size of userspace buffer and mask_bits -> 6 bytes */
1764 	if (copy_from_user(&qinfo, udata, 6)) {
1765 		rc = -EFAULT;
1766 		goto out;
1767 	}
1768 	qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1769 	if (!qinfo.udata) {
1770 		rc = -ENOMEM;
1771 		goto out;
1772 	}
1773 	qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1774 	rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1775 	if (rc) {
1776 		if (copy_to_user(udata, qinfo.udata, 4))
1777 			rc = -EFAULT;
1778 		goto free_and_out;
1779 	}
1780 	if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1781 		/* fails in case of GuestLAN QDIO mode */
1782 		qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1783 	}
1784 	if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1785 		QETH_CARD_TEXT(card, 4, "qactf");
1786 		rc = -EFAULT;
1787 		goto free_and_out;
1788 	}
1789 	QETH_CARD_TEXT(card, 4, "qacts");
1790 
1791 free_and_out:
1792 	kfree(qinfo.udata);
1793 out:
1794 	return rc;
1795 }
1796 
1797 static int qeth_l3_arp_add_entry(struct qeth_card *card,
1798 				struct qeth_arp_cache_entry *entry)
1799 {
1800 	struct qeth_cmd_buffer *iob;
1801 	char buf[16];
1802 	int tmp;
1803 	int rc;
1804 
1805 	QETH_CARD_TEXT(card, 3, "arpadent");
1806 
1807 	/*
1808 	 * currently GuestLAN only supports the ARP assist function
1809 	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1810 	 * thus we say EOPNOTSUPP for this ARP function
1811 	 */
1812 	if (card->info.guestlan)
1813 		return -EOPNOTSUPP;
1814 	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1815 		return -EOPNOTSUPP;
1816 	}
1817 
1818 	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1819 				       IPA_CMD_ASS_ARP_ADD_ENTRY,
1820 				       sizeof(struct qeth_arp_cache_entry),
1821 				       QETH_PROT_IPV4);
1822 	if (!iob)
1823 		return -ENOMEM;
1824 	rc = qeth_send_setassparms(card, iob,
1825 				   sizeof(struct qeth_arp_cache_entry),
1826 				   (unsigned long) entry,
1827 				   qeth_setassparms_cb, NULL);
1828 	if (rc) {
1829 		tmp = rc;
1830 		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
1831 		QETH_DBF_MESSAGE(2, "Could not add ARP entry for address %s "
1832 			"on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
1833 			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
1834 	}
1835 	return rc;
1836 }
1837 
1838 static int qeth_l3_arp_remove_entry(struct qeth_card *card,
1839 				struct qeth_arp_cache_entry *entry)
1840 {
1841 	struct qeth_cmd_buffer *iob;
1842 	char buf[16] = {0, };
1843 	int tmp;
1844 	int rc;
1845 
1846 	QETH_CARD_TEXT(card, 3, "arprment");
1847 
1848 	/*
1849 	 * currently GuestLAN only supports the ARP assist function
1850 	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1851 	 * thus we say EOPNOTSUPP for this ARP function
1852 	 */
1853 	if (card->info.guestlan)
1854 		return -EOPNOTSUPP;
1855 	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1856 		return -EOPNOTSUPP;
1857 	}
1858 	memcpy(buf, entry, 12);
1859 	iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1860 				       IPA_CMD_ASS_ARP_REMOVE_ENTRY,
1861 				       12,
1862 				       QETH_PROT_IPV4);
1863 	if (!iob)
1864 		return -ENOMEM;
1865 	rc = qeth_send_setassparms(card, iob,
1866 				   12, (unsigned long)buf,
1867 				   qeth_setassparms_cb, NULL);
1868 	if (rc) {
1869 		tmp = rc;
1870 		memset(buf, 0, 16);
1871 		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
1872 		QETH_DBF_MESSAGE(2, "Could not delete ARP entry for address %s"
1873 			" on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
1874 			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
1875 	}
1876 	return rc;
1877 }
1878 
1879 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1880 {
1881 	int rc;
1882 	int tmp;
1883 
1884 	QETH_CARD_TEXT(card, 3, "arpflush");
1885 
1886 	/*
1887 	 * currently GuestLAN only supports the ARP assist function
1888 	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1889 	 * thus we say EOPNOTSUPP for this ARP function
1890 	*/
1891 	if (card->info.guestlan || (card->info.type == QETH_CARD_TYPE_IQD))
1892 		return -EOPNOTSUPP;
1893 	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1894 		return -EOPNOTSUPP;
1895 	}
1896 	rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
1897 					  IPA_CMD_ASS_ARP_FLUSH_CACHE, 0);
1898 	if (rc) {
1899 		tmp = rc;
1900 		QETH_DBF_MESSAGE(2, "Could not flush ARP cache on %s: %s "
1901 			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
1902 			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
1903 	}
1904 	return rc;
1905 }
1906 
1907 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1908 {
1909 	struct qeth_card *card = dev->ml_priv;
1910 	struct qeth_arp_cache_entry arp_entry;
1911 	int rc = 0;
1912 
1913 	switch (cmd) {
1914 	case SIOC_QETH_ARP_SET_NO_ENTRIES:
1915 		if (!capable(CAP_NET_ADMIN)) {
1916 			rc = -EPERM;
1917 			break;
1918 		}
1919 		rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1920 		break;
1921 	case SIOC_QETH_ARP_QUERY_INFO:
1922 		if (!capable(CAP_NET_ADMIN)) {
1923 			rc = -EPERM;
1924 			break;
1925 		}
1926 		rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1927 		break;
1928 	case SIOC_QETH_ARP_ADD_ENTRY:
1929 		if (!capable(CAP_NET_ADMIN)) {
1930 			rc = -EPERM;
1931 			break;
1932 		}
1933 		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
1934 				   sizeof(struct qeth_arp_cache_entry)))
1935 			rc = -EFAULT;
1936 		else
1937 			rc = qeth_l3_arp_add_entry(card, &arp_entry);
1938 		break;
1939 	case SIOC_QETH_ARP_REMOVE_ENTRY:
1940 		if (!capable(CAP_NET_ADMIN)) {
1941 			rc = -EPERM;
1942 			break;
1943 		}
1944 		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
1945 				   sizeof(struct qeth_arp_cache_entry)))
1946 			rc = -EFAULT;
1947 		else
1948 			rc = qeth_l3_arp_remove_entry(card, &arp_entry);
1949 		break;
1950 	case SIOC_QETH_ARP_FLUSH_CACHE:
1951 		if (!capable(CAP_NET_ADMIN)) {
1952 			rc = -EPERM;
1953 			break;
1954 		}
1955 		rc = qeth_l3_arp_flush_cache(card);
1956 		break;
1957 	default:
1958 		rc = -EOPNOTSUPP;
1959 	}
1960 	return rc;
1961 }
1962 
1963 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1964 {
1965 	struct neighbour *n = NULL;
1966 	struct dst_entry *dst;
1967 
1968 	rcu_read_lock();
1969 	dst = skb_dst(skb);
1970 	if (dst)
1971 		n = dst_neigh_lookup_skb(dst, skb);
1972 	if (n) {
1973 		int cast_type = n->type;
1974 
1975 		rcu_read_unlock();
1976 		neigh_release(n);
1977 		if ((cast_type == RTN_BROADCAST) ||
1978 		    (cast_type == RTN_MULTICAST) ||
1979 		    (cast_type == RTN_ANYCAST))
1980 			return cast_type;
1981 		return RTN_UNSPEC;
1982 	}
1983 	rcu_read_unlock();
1984 
1985 	/* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1986 	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6)
1987 		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1988 				RTN_MULTICAST : RTN_UNSPEC;
1989 	else if (be16_to_cpu(skb->protocol) == ETH_P_IP)
1990 		return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1991 				RTN_MULTICAST : RTN_UNSPEC;
1992 
1993 	/* ... and MAC address */
1994 	if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, skb->dev->broadcast))
1995 		return RTN_BROADCAST;
1996 	if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
1997 		return RTN_MULTICAST;
1998 
1999 	/* default to unicast */
2000 	return RTN_UNSPEC;
2001 }
2002 
2003 static void qeth_l3_fill_af_iucv_hdr(struct qeth_card *card,
2004 		struct qeth_hdr *hdr, struct sk_buff *skb)
2005 {
2006 	char daddr[16];
2007 	struct af_iucv_trans_hdr *iucv_hdr;
2008 
2009 	memset(hdr, 0, sizeof(struct qeth_hdr));
2010 	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
2011 	hdr->hdr.l3.ext_flags = 0;
2012 	hdr->hdr.l3.length = skb->len - ETH_HLEN;
2013 	hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
2014 
2015 	iucv_hdr = (struct af_iucv_trans_hdr *) (skb->data + ETH_HLEN);
2016 	memset(daddr, 0, sizeof(daddr));
2017 	daddr[0] = 0xfe;
2018 	daddr[1] = 0x80;
2019 	memcpy(&daddr[8], iucv_hdr->destUserID, 8);
2020 	memcpy(hdr->hdr.l3.next_hop.ipv6_addr, daddr, 16);
2021 }
2022 
2023 static u8 qeth_l3_cast_type_to_flag(int cast_type)
2024 {
2025 	if (cast_type == RTN_MULTICAST)
2026 		return QETH_CAST_MULTICAST;
2027 	if (cast_type == RTN_ANYCAST)
2028 		return QETH_CAST_ANYCAST;
2029 	if (cast_type == RTN_BROADCAST)
2030 		return QETH_CAST_BROADCAST;
2031 	return QETH_CAST_UNICAST;
2032 }
2033 
2034 static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
2035 				struct sk_buff *skb, int ipv, int cast_type,
2036 				unsigned int data_len)
2037 {
2038 	memset(hdr, 0, sizeof(struct qeth_hdr));
2039 	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
2040 	hdr->hdr.l3.length = data_len;
2041 
2042 	/*
2043 	 * before we're going to overwrite this location with next hop ip.
2044 	 * v6 uses passthrough, v4 sets the tag in the QDIO header.
2045 	 */
2046 	if (skb_vlan_tag_present(skb)) {
2047 		if ((ipv == 4) || (card->info.type == QETH_CARD_TYPE_IQD))
2048 			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_VLAN_FRAME;
2049 		else
2050 			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_INCLUDE_VLAN_TAG;
2051 		hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
2052 	}
2053 
2054 	/* OSA only: */
2055 	if (!ipv) {
2056 		hdr->hdr.l3.flags = QETH_HDR_PASSTHRU;
2057 		if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
2058 					    skb->dev->broadcast))
2059 			hdr->hdr.l3.flags |= QETH_CAST_BROADCAST;
2060 		else
2061 			hdr->hdr.l3.flags |= (cast_type == RTN_MULTICAST) ?
2062 				QETH_CAST_MULTICAST : QETH_CAST_UNICAST;
2063 		return;
2064 	}
2065 
2066 	hdr->hdr.l3.flags = qeth_l3_cast_type_to_flag(cast_type);
2067 	rcu_read_lock();
2068 	if (ipv == 4) {
2069 		struct rtable *rt = skb_rtable(skb);
2070 
2071 		*((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
2072 				rt_nexthop(rt, ip_hdr(skb)->daddr) :
2073 				ip_hdr(skb)->daddr;
2074 	} else {
2075 		/* IPv6 */
2076 		const struct rt6_info *rt = skb_rt6_info(skb);
2077 		const struct in6_addr *next_hop;
2078 
2079 		if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
2080 			next_hop = &rt->rt6i_gateway;
2081 		else
2082 			next_hop = &ipv6_hdr(skb)->daddr;
2083 		memcpy(hdr->hdr.l3.next_hop.ipv6_addr, next_hop, 16);
2084 
2085 		hdr->hdr.l3.flags |= QETH_HDR_IPV6;
2086 		if (card->info.type != QETH_CARD_TYPE_IQD)
2087 			hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
2088 	}
2089 	rcu_read_unlock();
2090 }
2091 
2092 static void qeth_tso_fill_header(struct qeth_card *card,
2093 		struct qeth_hdr *qhdr, struct sk_buff *skb)
2094 {
2095 	struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr;
2096 	struct tcphdr *tcph = tcp_hdr(skb);
2097 	struct iphdr *iph = ip_hdr(skb);
2098 	struct ipv6hdr *ip6h = ipv6_hdr(skb);
2099 
2100 	/*fix header to TSO values ...*/
2101 	hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
2102 	/*set values which are fix for the first approach ...*/
2103 	hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
2104 	hdr->ext.imb_hdr_no  = 1;
2105 	hdr->ext.hdr_type    = 1;
2106 	hdr->ext.hdr_version = 1;
2107 	hdr->ext.hdr_len     = 28;
2108 	/*insert non-fix values */
2109 	hdr->ext.mss = skb_shinfo(skb)->gso_size;
2110 	hdr->ext.dg_hdr_len = (__u16)(ip_hdrlen(skb) + tcp_hdrlen(skb));
2111 	hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
2112 				       sizeof(struct qeth_hdr_tso));
2113 	tcph->check = 0;
2114 	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6) {
2115 		ip6h->payload_len = 0;
2116 		tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
2117 					       0, IPPROTO_TCP, 0);
2118 	} else {
2119 		/*OSA want us to set these values ...*/
2120 		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
2121 					 0, IPPROTO_TCP, 0);
2122 		iph->tot_len = 0;
2123 		iph->check = 0;
2124 	}
2125 }
2126 
2127 /**
2128  * qeth_l3_get_elements_no_tso() - find number of SBALEs for skb data for tso
2129  * @card:			   qeth card structure, to check max. elems.
2130  * @skb:			   SKB address
2131  * @extra_elems:		   extra elems needed, to check against max.
2132  *
2133  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
2134  * skb data, including linear part and fragments, but excluding TCP header.
2135  * (Exclusion of TCP header distinguishes it from qeth_get_elements_no().)
2136  * Checks if the result plus extra_elems fits under the limit for the card.
2137  * Returns 0 if it does not.
2138  * Note: extra_elems is not included in the returned result.
2139  */
2140 static int qeth_l3_get_elements_no_tso(struct qeth_card *card,
2141 			struct sk_buff *skb, int extra_elems)
2142 {
2143 	addr_t start = (addr_t)tcp_hdr(skb) + tcp_hdrlen(skb);
2144 	addr_t end = (addr_t)skb->data + skb_headlen(skb);
2145 	int elements = qeth_get_elements_for_frags(skb);
2146 
2147 	if (start != end)
2148 		elements += qeth_get_elements_for_range(start, end);
2149 
2150 	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
2151 		QETH_DBF_MESSAGE(2,
2152 	"Invalid size of TSO IP packet (Number=%d / Length=%d). Discarded.\n",
2153 				elements + extra_elems, skb->len);
2154 		return 0;
2155 	}
2156 	return elements;
2157 }
2158 
2159 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
2160 					   struct net_device *dev)
2161 {
2162 	int rc;
2163 	__be16 *tag;
2164 	struct qeth_hdr *hdr = NULL;
2165 	int hdr_elements = 0;
2166 	int elements;
2167 	struct qeth_card *card = dev->ml_priv;
2168 	struct sk_buff *new_skb = NULL;
2169 	int ipv = qeth_get_ip_version(skb);
2170 	int cast_type = qeth_l3_get_cast_type(skb);
2171 	struct qeth_qdio_out_q *queue =
2172 		card->qdio.out_qs[card->qdio.do_prio_queueing
2173 			|| (cast_type && card->info.is_multicast_different) ?
2174 			qeth_get_priority_queue(card, skb, ipv, cast_type) :
2175 			card->qdio.default_out_queue];
2176 	int tx_bytes = skb->len;
2177 	unsigned int hd_len = 0;
2178 	bool use_tso;
2179 	int data_offset = -1;
2180 	unsigned int nr_frags;
2181 
2182 	if (((card->info.type == QETH_CARD_TYPE_IQD) &&
2183 	     (((card->options.cq != QETH_CQ_ENABLED) && !ipv) ||
2184 	      ((card->options.cq == QETH_CQ_ENABLED) &&
2185 	       (be16_to_cpu(skb->protocol) != ETH_P_AF_IUCV)))) ||
2186 	    card->options.sniffer)
2187 			goto tx_drop;
2188 
2189 	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
2190 		card->stats.tx_carrier_errors++;
2191 		goto tx_drop;
2192 	}
2193 
2194 	if ((cast_type == RTN_BROADCAST) &&
2195 	    (card->info.broadcast_capable == 0))
2196 		goto tx_drop;
2197 
2198 	if (card->options.performance_stats) {
2199 		card->perf_stats.outbound_cnt++;
2200 		card->perf_stats.outbound_start_time = qeth_get_micros();
2201 	}
2202 
2203 	/* Ignore segment size from skb_is_gso(), 1 page is always used. */
2204 	use_tso = skb_is_gso(skb) &&
2205 		  (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4);
2206 
2207 	if (card->info.type == QETH_CARD_TYPE_IQD) {
2208 		new_skb = skb;
2209 		data_offset = ETH_HLEN;
2210 		hd_len = sizeof(*hdr);
2211 		hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
2212 		if (!hdr)
2213 			goto tx_drop;
2214 		hdr_elements++;
2215 	} else {
2216 		/* create a clone with writeable headroom */
2217 		new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr_tso)
2218 					+ VLAN_HLEN);
2219 		if (!new_skb)
2220 			goto tx_drop;
2221 
2222 		if (ipv == 4) {
2223 			skb_pull(new_skb, ETH_HLEN);
2224 		}
2225 
2226 		if (ipv != 4 && skb_vlan_tag_present(new_skb)) {
2227 			skb_push(new_skb, VLAN_HLEN);
2228 			skb_copy_to_linear_data(new_skb, new_skb->data + 4, 4);
2229 			skb_copy_to_linear_data_offset(new_skb, 4,
2230 				new_skb->data + 8, 4);
2231 			skb_copy_to_linear_data_offset(new_skb, 8,
2232 				new_skb->data + 12, 4);
2233 			tag = (__be16 *)(new_skb->data + 12);
2234 			*tag = cpu_to_be16(ETH_P_8021Q);
2235 			*(tag + 1) = cpu_to_be16(skb_vlan_tag_get(new_skb));
2236 		}
2237 	}
2238 
2239 	netif_stop_queue(dev);
2240 
2241 	/* fix hardware limitation: as long as we do not have sbal
2242 	 * chaining we can not send long frag lists
2243 	 */
2244 	if ((card->info.type != QETH_CARD_TYPE_IQD) &&
2245 	    ((use_tso && !qeth_l3_get_elements_no_tso(card, new_skb, 1)) ||
2246 	     (!use_tso && !qeth_get_elements_no(card, new_skb, 0, 0)))) {
2247 		int lin_rc = skb_linearize(new_skb);
2248 
2249 		if (card->options.performance_stats) {
2250 			if (lin_rc)
2251 				card->perf_stats.tx_linfail++;
2252 			else
2253 				card->perf_stats.tx_lin++;
2254 		}
2255 		if (lin_rc)
2256 			goto tx_drop;
2257 	}
2258 	nr_frags = skb_shinfo(new_skb)->nr_frags;
2259 
2260 	if (use_tso) {
2261 		hdr = skb_push(new_skb, sizeof(struct qeth_hdr_tso));
2262 		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
2263 		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
2264 				    new_skb->len - sizeof(struct qeth_hdr_tso));
2265 		qeth_tso_fill_header(card, hdr, new_skb);
2266 		hdr_elements++;
2267 	} else {
2268 		if (data_offset < 0) {
2269 			hdr = skb_push(new_skb, sizeof(struct qeth_hdr));
2270 			qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
2271 					    new_skb->len -
2272 					    sizeof(struct qeth_hdr));
2273 		} else {
2274 			if (be16_to_cpu(new_skb->protocol) == ETH_P_AF_IUCV)
2275 				qeth_l3_fill_af_iucv_hdr(card, hdr, new_skb);
2276 			else {
2277 				qeth_l3_fill_header(card, hdr, new_skb, ipv,
2278 						    cast_type,
2279 						    new_skb->len - data_offset);
2280 			}
2281 		}
2282 
2283 		if (new_skb->ip_summed == CHECKSUM_PARTIAL) {
2284 			qeth_tx_csum(new_skb, &hdr->hdr.l3.ext_flags, ipv);
2285 			if (card->options.performance_stats)
2286 				card->perf_stats.tx_csum++;
2287 		}
2288 	}
2289 
2290 	elements = use_tso ?
2291 		   qeth_l3_get_elements_no_tso(card, new_skb, hdr_elements) :
2292 		   qeth_get_elements_no(card, new_skb, hdr_elements,
2293 					(data_offset > 0) ? data_offset : 0);
2294 	if (!elements) {
2295 		if (data_offset >= 0)
2296 			kmem_cache_free(qeth_core_header_cache, hdr);
2297 		goto tx_drop;
2298 	}
2299 	elements += hdr_elements;
2300 
2301 	if (card->info.type != QETH_CARD_TYPE_IQD) {
2302 		int len;
2303 		if (use_tso) {
2304 			hd_len = sizeof(struct qeth_hdr_tso) +
2305 				 ip_hdrlen(new_skb) + tcp_hdrlen(new_skb);
2306 			len = hd_len;
2307 		} else {
2308 			len = sizeof(struct qeth_hdr_layer3);
2309 		}
2310 
2311 		if (qeth_hdr_chk_and_bounce(new_skb, &hdr, len))
2312 			goto tx_drop;
2313 		rc = qeth_do_send_packet(card, queue, new_skb, hdr, hd_len,
2314 					 hd_len, elements);
2315 	} else
2316 		rc = qeth_do_send_packet_fast(queue, new_skb, hdr, data_offset,
2317 					      hd_len);
2318 
2319 	if (!rc) {
2320 		card->stats.tx_packets++;
2321 		card->stats.tx_bytes += tx_bytes;
2322 		if (new_skb != skb)
2323 			dev_kfree_skb_any(skb);
2324 		if (card->options.performance_stats) {
2325 			if (use_tso) {
2326 				card->perf_stats.large_send_bytes += tx_bytes;
2327 				card->perf_stats.large_send_cnt++;
2328 			}
2329 			if (nr_frags) {
2330 				card->perf_stats.sg_skbs_sent++;
2331 				/* nr_frags + skb->data */
2332 				card->perf_stats.sg_frags_sent += nr_frags + 1;
2333 			}
2334 		}
2335 		rc = NETDEV_TX_OK;
2336 	} else {
2337 		if (data_offset >= 0)
2338 			kmem_cache_free(qeth_core_header_cache, hdr);
2339 
2340 		if (rc == -EBUSY) {
2341 			if (new_skb != skb)
2342 				dev_kfree_skb_any(new_skb);
2343 			return NETDEV_TX_BUSY;
2344 		} else
2345 			goto tx_drop;
2346 	}
2347 
2348 	netif_wake_queue(dev);
2349 	if (card->options.performance_stats)
2350 		card->perf_stats.outbound_time += qeth_get_micros() -
2351 			card->perf_stats.outbound_start_time;
2352 	return rc;
2353 
2354 tx_drop:
2355 	card->stats.tx_dropped++;
2356 	card->stats.tx_errors++;
2357 	if ((new_skb != skb) && new_skb)
2358 		dev_kfree_skb_any(new_skb);
2359 	dev_kfree_skb_any(skb);
2360 	netif_wake_queue(dev);
2361 	return NETDEV_TX_OK;
2362 }
2363 
2364 static int __qeth_l3_open(struct net_device *dev)
2365 {
2366 	struct qeth_card *card = dev->ml_priv;
2367 	int rc = 0;
2368 
2369 	QETH_CARD_TEXT(card, 4, "qethopen");
2370 	if (card->state == CARD_STATE_UP)
2371 		return rc;
2372 	if (card->state != CARD_STATE_SOFTSETUP)
2373 		return -ENODEV;
2374 	card->data.state = CH_STATE_UP;
2375 	card->state = CARD_STATE_UP;
2376 	netif_start_queue(dev);
2377 
2378 	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
2379 		napi_enable(&card->napi);
2380 		napi_schedule(&card->napi);
2381 	} else
2382 		rc = -EIO;
2383 	return rc;
2384 }
2385 
2386 static int qeth_l3_open(struct net_device *dev)
2387 {
2388 	struct qeth_card *card = dev->ml_priv;
2389 
2390 	QETH_CARD_TEXT(card, 5, "qethope_");
2391 	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
2392 		QETH_CARD_TEXT(card, 3, "openREC");
2393 		return -ERESTARTSYS;
2394 	}
2395 	return __qeth_l3_open(dev);
2396 }
2397 
2398 static int qeth_l3_stop(struct net_device *dev)
2399 {
2400 	struct qeth_card *card = dev->ml_priv;
2401 
2402 	QETH_CARD_TEXT(card, 4, "qethstop");
2403 	netif_tx_disable(dev);
2404 	if (card->state == CARD_STATE_UP) {
2405 		card->state = CARD_STATE_SOFTSETUP;
2406 		napi_disable(&card->napi);
2407 	}
2408 	return 0;
2409 }
2410 
2411 static const struct ethtool_ops qeth_l3_ethtool_ops = {
2412 	.get_link = ethtool_op_get_link,
2413 	.get_strings = qeth_core_get_strings,
2414 	.get_ethtool_stats = qeth_core_get_ethtool_stats,
2415 	.get_sset_count = qeth_core_get_sset_count,
2416 	.get_drvinfo = qeth_core_get_drvinfo,
2417 	.get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
2418 };
2419 
2420 /*
2421  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
2422  * NOARP on the netdevice is no option because it also turns off neighbor
2423  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
2424  * arp resolution but we want the hard header (packet socket will work
2425  * e.g. tcpdump)
2426  */
2427 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
2428 {
2429 	n->nud_state = NUD_NOARP;
2430 	memcpy(n->ha, "FAKELL", 6);
2431 	n->output = n->ops->connected_output;
2432 	return 0;
2433 }
2434 
2435 static int
2436 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
2437 {
2438 	if (np->tbl->family == AF_INET)
2439 		np->neigh_setup = qeth_l3_neigh_setup_noarp;
2440 
2441 	return 0;
2442 }
2443 
2444 static const struct net_device_ops qeth_l3_netdev_ops = {
2445 	.ndo_open		= qeth_l3_open,
2446 	.ndo_stop		= qeth_l3_stop,
2447 	.ndo_get_stats		= qeth_get_stats,
2448 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
2449 	.ndo_validate_addr	= eth_validate_addr,
2450 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
2451 	.ndo_do_ioctl		= qeth_do_ioctl,
2452 	.ndo_change_mtu		= qeth_change_mtu,
2453 	.ndo_fix_features	= qeth_fix_features,
2454 	.ndo_set_features	= qeth_set_features,
2455 	.ndo_vlan_rx_add_vid	= qeth_l3_vlan_rx_add_vid,
2456 	.ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2457 	.ndo_tx_timeout		= qeth_tx_timeout,
2458 };
2459 
2460 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
2461 	.ndo_open		= qeth_l3_open,
2462 	.ndo_stop		= qeth_l3_stop,
2463 	.ndo_get_stats		= qeth_get_stats,
2464 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
2465 	.ndo_features_check	= qeth_features_check,
2466 	.ndo_validate_addr	= eth_validate_addr,
2467 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
2468 	.ndo_do_ioctl		= qeth_do_ioctl,
2469 	.ndo_change_mtu		= qeth_change_mtu,
2470 	.ndo_fix_features	= qeth_fix_features,
2471 	.ndo_set_features	= qeth_set_features,
2472 	.ndo_vlan_rx_add_vid	= qeth_l3_vlan_rx_add_vid,
2473 	.ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2474 	.ndo_tx_timeout		= qeth_tx_timeout,
2475 	.ndo_neigh_setup	= qeth_l3_neigh_setup,
2476 };
2477 
2478 static int qeth_l3_setup_netdev(struct qeth_card *card)
2479 {
2480 	int rc;
2481 
2482 	if (card->info.type == QETH_CARD_TYPE_OSD ||
2483 	    card->info.type == QETH_CARD_TYPE_OSX) {
2484 		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
2485 		    (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
2486 			pr_info("qeth_l3: ignoring TR device\n");
2487 			return -ENODEV;
2488 		}
2489 
2490 		card->dev = alloc_etherdev(0);
2491 		if (!card->dev)
2492 			return -ENODEV;
2493 		card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
2494 
2495 		/*IPv6 address autoconfiguration stuff*/
2496 		qeth_l3_get_unique_id(card);
2497 		if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
2498 			card->dev->dev_id = card->info.unique_id & 0xffff;
2499 
2500 		card->dev->hw_features |= NETIF_F_SG;
2501 		card->dev->vlan_features |= NETIF_F_SG;
2502 
2503 		if (!card->info.guestlan) {
2504 			card->dev->features |= NETIF_F_SG;
2505 			card->dev->hw_features |= NETIF_F_TSO |
2506 				NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2507 			card->dev->vlan_features |= NETIF_F_TSO |
2508 				NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2509 		}
2510 
2511 		if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
2512 			card->dev->hw_features |= NETIF_F_IPV6_CSUM;
2513 			card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
2514 		}
2515 	} else if (card->info.type == QETH_CARD_TYPE_IQD) {
2516 		card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
2517 					 ether_setup);
2518 		if (!card->dev)
2519 			return -ENODEV;
2520 		card->dev->flags |= IFF_NOARP;
2521 		card->dev->netdev_ops = &qeth_l3_netdev_ops;
2522 		rc = qeth_l3_iqd_read_initial_mac(card);
2523 		if (rc)
2524 			return rc;
2525 		if (card->options.hsuid[0])
2526 			memcpy(card->dev->perm_addr, card->options.hsuid, 9);
2527 	} else
2528 		return -ENODEV;
2529 
2530 	card->dev->ml_priv = card;
2531 	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
2532 	card->dev->mtu = card->info.initial_mtu;
2533 	card->dev->min_mtu = 64;
2534 	card->dev->max_mtu = ETH_MAX_MTU;
2535 	card->dev->dev_port = card->info.portno;
2536 	card->dev->ethtool_ops = &qeth_l3_ethtool_ops;
2537 	card->dev->features |=	NETIF_F_HW_VLAN_CTAG_TX |
2538 				NETIF_F_HW_VLAN_CTAG_RX |
2539 				NETIF_F_HW_VLAN_CTAG_FILTER;
2540 	netif_keep_dst(card->dev);
2541 	netif_set_gso_max_size(card->dev, (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
2542 					  PAGE_SIZE);
2543 
2544 	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
2545 	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
2546 	netif_carrier_off(card->dev);
2547 	return register_netdev(card->dev);
2548 }
2549 
2550 static const struct device_type qeth_l3_devtype = {
2551 	.name = "qeth_layer3",
2552 	.groups = qeth_l3_attr_groups,
2553 };
2554 
2555 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
2556 {
2557 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2558 	int rc;
2559 
2560 	if (gdev->dev.type == &qeth_generic_devtype) {
2561 		rc = qeth_l3_create_device_attributes(&gdev->dev);
2562 		if (rc)
2563 			return rc;
2564 	}
2565 	hash_init(card->ip_htable);
2566 	hash_init(card->ip_mc_htable);
2567 	card->options.layer2 = 0;
2568 	card->info.hwtrap = 0;
2569 	return 0;
2570 }
2571 
2572 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2573 {
2574 	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2575 
2576 	if (cgdev->dev.type == &qeth_generic_devtype)
2577 		qeth_l3_remove_device_attributes(&cgdev->dev);
2578 
2579 	qeth_set_allowed_threads(card, 0, 1);
2580 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2581 
2582 	if (cgdev->state == CCWGROUP_ONLINE)
2583 		qeth_l3_set_offline(cgdev);
2584 
2585 	if (card->dev) {
2586 		unregister_netdev(card->dev);
2587 		free_netdev(card->dev);
2588 		card->dev = NULL;
2589 	}
2590 
2591 	qeth_l3_clear_ip_htable(card, 0);
2592 	qeth_l3_clear_ipato_list(card);
2593 	return;
2594 }
2595 
2596 static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
2597 {
2598 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2599 	int rc = 0;
2600 	enum qeth_card_states recover_flag;
2601 
2602 	mutex_lock(&card->discipline_mutex);
2603 	mutex_lock(&card->conf_mutex);
2604 	QETH_DBF_TEXT(SETUP, 2, "setonlin");
2605 	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
2606 
2607 	recover_flag = card->state;
2608 	rc = qeth_core_hardsetup_card(card);
2609 	if (rc) {
2610 		QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
2611 		rc = -ENODEV;
2612 		goto out_remove;
2613 	}
2614 
2615 	if (!card->dev && qeth_l3_setup_netdev(card)) {
2616 		rc = -ENODEV;
2617 		goto out_remove;
2618 	}
2619 
2620 	if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
2621 		if (card->info.hwtrap &&
2622 		    qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
2623 			card->info.hwtrap = 0;
2624 	} else
2625 		card->info.hwtrap = 0;
2626 
2627 	card->state = CARD_STATE_HARDSETUP;
2628 	qeth_print_status_message(card);
2629 
2630 	/* softsetup */
2631 	QETH_DBF_TEXT(SETUP, 2, "softsetp");
2632 
2633 	rc = qeth_l3_setadapter_parms(card);
2634 	if (rc)
2635 		QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
2636 	if (!card->options.sniffer) {
2637 		rc = qeth_l3_start_ipassists(card);
2638 		if (rc) {
2639 			QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2640 			goto out_remove;
2641 		}
2642 		rc = qeth_l3_setrouting_v4(card);
2643 		if (rc)
2644 			QETH_DBF_TEXT_(SETUP, 2, "4err%04x", rc);
2645 		rc = qeth_l3_setrouting_v6(card);
2646 		if (rc)
2647 			QETH_DBF_TEXT_(SETUP, 2, "5err%04x", rc);
2648 	}
2649 	netif_tx_disable(card->dev);
2650 
2651 	rc = qeth_init_qdio_queues(card);
2652 	if (rc) {
2653 		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2654 		rc = -ENODEV;
2655 		goto out_remove;
2656 	}
2657 	card->state = CARD_STATE_SOFTSETUP;
2658 
2659 	qeth_set_allowed_threads(card, 0xffffffff, 0);
2660 	qeth_l3_recover_ip(card);
2661 	if (card->lan_online)
2662 		netif_carrier_on(card->dev);
2663 	else
2664 		netif_carrier_off(card->dev);
2665 	if (recover_flag == CARD_STATE_RECOVER) {
2666 		rtnl_lock();
2667 		if (recovery_mode)
2668 			__qeth_l3_open(card->dev);
2669 		else
2670 			dev_open(card->dev);
2671 		qeth_l3_set_rx_mode(card->dev);
2672 		qeth_recover_features(card->dev);
2673 		rtnl_unlock();
2674 	}
2675 	qeth_trace_features(card);
2676 	/* let user_space know that device is online */
2677 	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2678 	mutex_unlock(&card->conf_mutex);
2679 	mutex_unlock(&card->discipline_mutex);
2680 	return 0;
2681 out_remove:
2682 	qeth_l3_stop_card(card, 0);
2683 	ccw_device_set_offline(CARD_DDEV(card));
2684 	ccw_device_set_offline(CARD_WDEV(card));
2685 	ccw_device_set_offline(CARD_RDEV(card));
2686 	qdio_free(CARD_DDEV(card));
2687 	if (recover_flag == CARD_STATE_RECOVER)
2688 		card->state = CARD_STATE_RECOVER;
2689 	else
2690 		card->state = CARD_STATE_DOWN;
2691 	mutex_unlock(&card->conf_mutex);
2692 	mutex_unlock(&card->discipline_mutex);
2693 	return rc;
2694 }
2695 
2696 static int qeth_l3_set_online(struct ccwgroup_device *gdev)
2697 {
2698 	return __qeth_l3_set_online(gdev, 0);
2699 }
2700 
2701 static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
2702 			int recovery_mode)
2703 {
2704 	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2705 	int rc = 0, rc2 = 0, rc3 = 0;
2706 	enum qeth_card_states recover_flag;
2707 
2708 	mutex_lock(&card->discipline_mutex);
2709 	mutex_lock(&card->conf_mutex);
2710 	QETH_DBF_TEXT(SETUP, 3, "setoffl");
2711 	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
2712 
2713 	if (card->dev && netif_carrier_ok(card->dev))
2714 		netif_carrier_off(card->dev);
2715 	recover_flag = card->state;
2716 	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
2717 		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2718 		card->info.hwtrap = 1;
2719 	}
2720 	qeth_l3_stop_card(card, recovery_mode);
2721 	if ((card->options.cq == QETH_CQ_ENABLED) && card->dev) {
2722 		rtnl_lock();
2723 		call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
2724 		rtnl_unlock();
2725 	}
2726 	rc  = ccw_device_set_offline(CARD_DDEV(card));
2727 	rc2 = ccw_device_set_offline(CARD_WDEV(card));
2728 	rc3 = ccw_device_set_offline(CARD_RDEV(card));
2729 	if (!rc)
2730 		rc = (rc2) ? rc2 : rc3;
2731 	if (rc)
2732 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2733 	qdio_free(CARD_DDEV(card));
2734 	if (recover_flag == CARD_STATE_UP)
2735 		card->state = CARD_STATE_RECOVER;
2736 	/* let user_space know that device is offline */
2737 	kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
2738 	mutex_unlock(&card->conf_mutex);
2739 	mutex_unlock(&card->discipline_mutex);
2740 	return 0;
2741 }
2742 
2743 static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
2744 {
2745 	return __qeth_l3_set_offline(cgdev, 0);
2746 }
2747 
2748 static int qeth_l3_recover(void *ptr)
2749 {
2750 	struct qeth_card *card;
2751 	int rc = 0;
2752 
2753 	card = (struct qeth_card *) ptr;
2754 	QETH_CARD_TEXT(card, 2, "recover1");
2755 	QETH_CARD_HEX(card, 2, &card, sizeof(void *));
2756 	if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
2757 		return 0;
2758 	QETH_CARD_TEXT(card, 2, "recover2");
2759 	dev_warn(&card->gdev->dev,
2760 		"A recovery process has been started for the device\n");
2761 	qeth_set_recovery_task(card);
2762 	__qeth_l3_set_offline(card->gdev, 1);
2763 	rc = __qeth_l3_set_online(card->gdev, 1);
2764 	if (!rc)
2765 		dev_info(&card->gdev->dev,
2766 			"Device successfully recovered!\n");
2767 	else {
2768 		qeth_close_dev(card);
2769 		dev_warn(&card->gdev->dev, "The qeth device driver "
2770 				"failed to recover an error on the device\n");
2771 	}
2772 	qeth_clear_recovery_task(card);
2773 	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
2774 	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
2775 	return 0;
2776 }
2777 
2778 static int qeth_l3_pm_suspend(struct ccwgroup_device *gdev)
2779 {
2780 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2781 
2782 	if (card->dev)
2783 		netif_device_detach(card->dev);
2784 	qeth_set_allowed_threads(card, 0, 1);
2785 	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2786 	if (gdev->state == CCWGROUP_OFFLINE)
2787 		return 0;
2788 	if (card->state == CARD_STATE_UP) {
2789 		if (card->info.hwtrap)
2790 			qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2791 		__qeth_l3_set_offline(card->gdev, 1);
2792 	} else
2793 		__qeth_l3_set_offline(card->gdev, 0);
2794 	return 0;
2795 }
2796 
2797 static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
2798 {
2799 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2800 	int rc = 0;
2801 
2802 	if (gdev->state == CCWGROUP_OFFLINE)
2803 		goto out;
2804 
2805 	if (card->state == CARD_STATE_RECOVER) {
2806 		rc = __qeth_l3_set_online(card->gdev, 1);
2807 		if (rc) {
2808 			rtnl_lock();
2809 			dev_close(card->dev);
2810 			rtnl_unlock();
2811 		}
2812 	} else
2813 		rc = __qeth_l3_set_online(card->gdev, 0);
2814 out:
2815 	qeth_set_allowed_threads(card, 0xffffffff, 0);
2816 	if (card->dev)
2817 		netif_device_attach(card->dev);
2818 	if (rc)
2819 		dev_warn(&card->gdev->dev, "The qeth device driver "
2820 			"failed to recover an error on the device\n");
2821 	return rc;
2822 }
2823 
2824 /* Returns zero if the command is successfully "consumed" */
2825 static int qeth_l3_control_event(struct qeth_card *card,
2826 					struct qeth_ipa_cmd *cmd)
2827 {
2828 	return 1;
2829 }
2830 
2831 struct qeth_discipline qeth_l3_discipline = {
2832 	.devtype = &qeth_l3_devtype,
2833 	.process_rx_buffer = qeth_l3_process_inbound_buffer,
2834 	.recover = qeth_l3_recover,
2835 	.setup = qeth_l3_probe_device,
2836 	.remove = qeth_l3_remove_device,
2837 	.set_online = qeth_l3_set_online,
2838 	.set_offline = qeth_l3_set_offline,
2839 	.freeze = qeth_l3_pm_suspend,
2840 	.thaw = qeth_l3_pm_resume,
2841 	.restore = qeth_l3_pm_resume,
2842 	.do_ioctl = qeth_l3_do_ioctl,
2843 	.control_event_handler = qeth_l3_control_event,
2844 };
2845 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2846 
2847 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2848 				   struct qeth_ipaddr *addr,
2849 				   unsigned long event)
2850 {
2851 	switch (event) {
2852 	case NETDEV_UP:
2853 		spin_lock_bh(&card->ip_lock);
2854 		qeth_l3_add_ip(card, addr);
2855 		spin_unlock_bh(&card->ip_lock);
2856 		return NOTIFY_OK;
2857 	case NETDEV_DOWN:
2858 		spin_lock_bh(&card->ip_lock);
2859 		qeth_l3_delete_ip(card, addr);
2860 		spin_unlock_bh(&card->ip_lock);
2861 		return NOTIFY_OK;
2862 	default:
2863 		return NOTIFY_DONE;
2864 	}
2865 }
2866 
2867 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2868 {
2869 	if (is_vlan_dev(dev))
2870 		dev = vlan_dev_real_dev(dev);
2871 	if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2872 	    dev->netdev_ops == &qeth_l3_netdev_ops)
2873 		return (struct qeth_card *) dev->ml_priv;
2874 	return NULL;
2875 }
2876 
2877 static int qeth_l3_ip_event(struct notifier_block *this,
2878 			    unsigned long event, void *ptr)
2879 {
2880 
2881 	struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2882 	struct net_device *dev = ifa->ifa_dev->dev;
2883 	struct qeth_ipaddr addr;
2884 	struct qeth_card *card;
2885 
2886 	if (dev_net(dev) != &init_net)
2887 		return NOTIFY_DONE;
2888 
2889 	card = qeth_l3_get_card_from_dev(dev);
2890 	if (!card)
2891 		return NOTIFY_DONE;
2892 	QETH_CARD_TEXT(card, 3, "ipevent");
2893 
2894 	qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2895 	addr.u.a4.addr = be32_to_cpu(ifa->ifa_address);
2896 	addr.u.a4.mask = be32_to_cpu(ifa->ifa_mask);
2897 
2898 	return qeth_l3_handle_ip_event(card, &addr, event);
2899 }
2900 
2901 static struct notifier_block qeth_l3_ip_notifier = {
2902 	qeth_l3_ip_event,
2903 	NULL,
2904 };
2905 
2906 static int qeth_l3_ip6_event(struct notifier_block *this,
2907 			     unsigned long event, void *ptr)
2908 {
2909 	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2910 	struct net_device *dev = ifa->idev->dev;
2911 	struct qeth_ipaddr addr;
2912 	struct qeth_card *card;
2913 
2914 	card = qeth_l3_get_card_from_dev(dev);
2915 	if (!card)
2916 		return NOTIFY_DONE;
2917 	QETH_CARD_TEXT(card, 3, "ip6event");
2918 	if (!qeth_is_supported(card, IPA_IPV6))
2919 		return NOTIFY_DONE;
2920 
2921 	qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
2922 	addr.u.a6.addr = ifa->addr;
2923 	addr.u.a6.pfxlen = ifa->prefix_len;
2924 
2925 	return qeth_l3_handle_ip_event(card, &addr, event);
2926 }
2927 
2928 static struct notifier_block qeth_l3_ip6_notifier = {
2929 	qeth_l3_ip6_event,
2930 	NULL,
2931 };
2932 
2933 static int qeth_l3_register_notifiers(void)
2934 {
2935 	int rc;
2936 
2937 	QETH_DBF_TEXT(SETUP, 5, "regnotif");
2938 	rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2939 	if (rc)
2940 		return rc;
2941 	rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2942 	if (rc) {
2943 		unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2944 		return rc;
2945 	}
2946 	return 0;
2947 }
2948 
2949 static void qeth_l3_unregister_notifiers(void)
2950 {
2951 	QETH_DBF_TEXT(SETUP, 5, "unregnot");
2952 	WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2953 	WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2954 }
2955 
2956 static int __init qeth_l3_init(void)
2957 {
2958 	pr_info("register layer 3 discipline\n");
2959 	return qeth_l3_register_notifiers();
2960 }
2961 
2962 static void __exit qeth_l3_exit(void)
2963 {
2964 	qeth_l3_unregister_notifiers();
2965 	pr_info("unregister layer 3 discipline\n");
2966 }
2967 
2968 module_init(qeth_l3_init);
2969 module_exit(qeth_l3_exit);
2970 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2971 MODULE_DESCRIPTION("qeth layer 3 discipline");
2972 MODULE_LICENSE("GPL");
2973