text: /*
   *    Copyright IBM Corp. 2007, 2009
   *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   *		 Frank Pavlic <fpavlic@de.ibm.com>,
   *		 Thomas Spatzier <tspat@de.ibm.com>,
   *		 Frank Blaschka <frank.blaschka@de.ibm.com>
   */
  
  #define KMSG_COMPONENT "qeth"
  #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/bitops.h>
  #include <linux/string.h>
  #include <linux/errno.h>
  #include <linux/kernel.h>
  #include <linux/etherdevice.h>
  #include <linux/mii.h>
  #include <linux/ip.h>
  #include <linux/ipv6.h>
  #include <linux/inetdevice.h>
  #include <linux/igmp.h>
  #include <linux/slab.h>
  #include <linux/if_vlan.h>
  
  #include <net/ip.h>
  #include <net/arp.h>
  #include <net/route.h>
  #include <net/ip6_fib.h>
  #include <net/ip6_checksum.h>
  #include <net/iucv/af_iucv.h>
  
  #include "qeth_l3.h"
  
  
  static int qeth_l3_set_offline(struct ccwgroup_device *);
  static int qeth_l3_recover(void *);
  static int qeth_l3_stop(struct net_device *);
  static void qeth_l3_set_multicast_list(struct net_device *);
  static int qeth_l3_neigh_setup(struct net_device *, struct neigh_parms *);
  static int qeth_l3_register_addr_entry(struct qeth_card *,
  		struct qeth_ipaddr *);
  static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  		struct qeth_ipaddr *);
  static int __qeth_l3_set_online(struct ccwgroup_device *, int);
  static int __qeth_l3_set_offline(struct ccwgroup_device *, int);
  
  static int qeth_l3_isxdigit(char *buf)
  {
  	while (*buf) {
  		if (!isxdigit(*buf++))
  			return 0;
  	}
  	return 1;
  }
  
  void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
  {
  	sprintf(buf, "%i.%i.%i.%i", addr[0], addr[1], addr[2], addr[3]);
  }
  
  int qeth_l3_string_to_ipaddr4(const char *buf, __u8 *addr)
  {
  	int count = 0, rc = 0;
  	int in[4];
  	char c;
  
  	rc = sscanf(buf, "%u.%u.%u.%u%c",
  		    &in[0], &in[1], &in[2], &in[3], &c);
  	if (rc != 4 && (rc != 5 || c != '\n'))
  		return -EINVAL;
  	for (count = 0; count < 4; count++) {
  		if (in[count] > 255)
  			return -EINVAL;
  		addr[count] = in[count];
  	}
  	return 0;
  }
  
  void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
  {
  	sprintf(buf, "%pI6", addr);
  }
  
  int qeth_l3_string_to_ipaddr6(const char *buf, __u8 *addr)
  {
  	const char *end, *end_tmp, *start;
  	__u16 *in;
  	char num[5];
  	int num2, cnt, out, found, save_cnt;
  	unsigned short in_tmp[8] = {0, };
  
  	cnt = out = found = save_cnt = num2 = 0;
  	end = start = buf;
  	in = (__u16 *) addr;
  	memset(in, 0, 16);
  	while (*end) {
  		end = strchr(start, ':');
  		if (end == NULL) {
  			end = buf + strlen(buf);
  			end_tmp = strchr(start, '\n');
  			if (end_tmp != NULL)
  				end = end_tmp;
  			out = 1;
  		}
  		if ((end - start)) {
  			memset(num, 0, 5);
  			if ((end - start) > 4)
  				return -EINVAL;
  			memcpy(num, start, end - start);
  			if (!qeth_l3_isxdigit(num))
  				return -EINVAL;
  			sscanf(start, "%x", &num2);
  			if (found)
  				in_tmp[save_cnt++] = num2;
  			else
  				in[cnt++] = num2;
  			if (out)
  				break;
  		} else {
  			if (found)
  				return -EINVAL;
  			found = 1;
  		}
  		start = ++end;
  	}
  	if (cnt + save_cnt > 8)
  		return -EINVAL;
  	cnt = 7;
  	while (save_cnt)
  		in[cnt--] = in_tmp[--save_cnt];
  	return 0;
  }
  
  void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
  				char *buf)
  {
  	if (proto == QETH_PROT_IPV4)
  		qeth_l3_ipaddr4_to_string(addr, buf);
  	else if (proto == QETH_PROT_IPV6)
  		qeth_l3_ipaddr6_to_string(addr, buf);
  }
  
  int qeth_l3_string_to_ipaddr(const char *buf, enum qeth_prot_versions proto,
  				__u8 *addr)
  {
  	if (proto == QETH_PROT_IPV4)
  		return qeth_l3_string_to_ipaddr4(buf, addr);
  	else if (proto == QETH_PROT_IPV6)
  		return qeth_l3_string_to_ipaddr6(buf, addr);
  	else
  		return -EINVAL;
  }
  
  static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  {
  	int i, j;
  	u8 octet;
  
  	for (i = 0; i < len; ++i) {
  		octet = addr[i];
  		for (j = 7; j >= 0; --j) {
  			bits[i*8 + j] = octet & 1;
  			octet >>= 1;
  		}
  	}
  }
  
  int qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
  						struct qeth_ipaddr *addr)
  {
  	struct qeth_ipato_entry *ipatoe;
  	u8 addr_bits[128] = {0, };
  	u8 ipatoe_bits[128] = {0, };
  	int rc = 0;
  
  	if (!card->ipato.enabled)
  		return 0;
  
  	qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
  				  (addr->proto == QETH_PROT_IPV4)? 4:16);
  	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
  		if (addr->proto != ipatoe->proto)
  			continue;
  		qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
  					  (ipatoe->proto == QETH_PROT_IPV4) ?
  					  4 : 16);
  		if (addr->proto == QETH_PROT_IPV4)
  			rc = !memcmp(addr_bits, ipatoe_bits,
  				     min(32, ipatoe->mask_bits));
  		else
  			rc = !memcmp(addr_bits, ipatoe_bits,
  				     min(128, ipatoe->mask_bits));
  		if (rc)
  			break;
  	}
  	/* invert? */
  	if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
  		rc = !rc;
  	else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
  		rc = !rc;
  
  	return rc;
  }
  
  /*
   * Add IP to be added to todo list. If there is already an "add todo"
   * in this list we just incremenent the reference count.
   * Returns 0 if we  just incremented reference count.
   */
  static int __qeth_l3_insert_ip_todo(struct qeth_card *card,
  					struct qeth_ipaddr *addr, int add)
  {
  	struct qeth_ipaddr *tmp, *t;
  	int found = 0;
  
  	if (card->options.sniffer)
  		return 0;
  	list_for_each_entry_safe(tmp, t, card->ip_tbd_list, entry) {
  		if ((addr->type == QETH_IP_TYPE_DEL_ALL_MC) &&
  		    (tmp->type == QETH_IP_TYPE_DEL_ALL_MC))
  			return 0;
  		if ((tmp->proto        == QETH_PROT_IPV4)     &&
  		    (addr->proto       == QETH_PROT_IPV4)     &&
  		    (tmp->type         == addr->type)         &&
  		    (tmp->is_multicast == addr->is_multicast) &&
  		    (tmp->u.a4.addr    == addr->u.a4.addr)    &&
  		    (tmp->u.a4.mask    == addr->u.a4.mask)) {
  			found = 1;
  			break;
  		}
  		if ((tmp->proto        == QETH_PROT_IPV6)      &&
  		    (addr->proto       == QETH_PROT_IPV6)      &&
  		    (tmp->type         == addr->type)          &&
  		    (tmp->is_multicast == addr->is_multicast)  &&
  		    (tmp->u.a6.pfxlen  == addr->u.a6.pfxlen)   &&
  		    (memcmp(&tmp->u.a6.addr, &addr->u.a6.addr,
  			    sizeof(struct in6_addr)) == 0)) {
  			found = 1;
  			break;
  		}
  	}
  	if (found) {
  		if (addr->users != 0)
  			tmp->users += addr->users;
  		else
  			tmp->users += add ? 1 : -1;
  		if (tmp->users == 0) {
  			list_del(&tmp->entry);
  			kfree(tmp);
  		}
  		return 0;
  	} else {
  		if (addr->type == QETH_IP_TYPE_DEL_ALL_MC)
  			list_add(&addr->entry, card->ip_tbd_list);
  		else {
  			if (addr->users == 0)
  				addr->users += add ? 1 : -1;
  			if (add && (addr->type == QETH_IP_TYPE_NORMAL) &&
  			    qeth_l3_is_addr_covered_by_ipato(card, addr)) {
  				QETH_CARD_TEXT(card, 2, "tkovaddr");
  				addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
  			}
  			list_add_tail(&addr->entry, card->ip_tbd_list);
  		}
  		return 1;
  	}
  }
  
  int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
  {
  	unsigned long flags;
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 4, "delip");
  
  	if (addr->proto == QETH_PROT_IPV4)
  		QETH_CARD_HEX(card, 4, &addr->u.a4.addr, 4);
  	else {
  		QETH_CARD_HEX(card, 4, &addr->u.a6.addr, 8);
  		QETH_CARD_HEX(card, 4, ((char *)&addr->u.a6.addr) + 8, 8);
  	}
  	spin_lock_irqsave(&card->ip_lock, flags);
  	rc = __qeth_l3_insert_ip_todo(card, addr, 0);
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	return rc;
  }
  
  int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
  {
  	unsigned long flags;
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 4, "addip");
  	if (addr->proto == QETH_PROT_IPV4)
  		QETH_CARD_HEX(card, 4, &addr->u.a4.addr, 4);
  	else {
  		QETH_CARD_HEX(card, 4, &addr->u.a6.addr, 8);
  		QETH_CARD_HEX(card, 4, ((char *)&addr->u.a6.addr) + 8, 8);
  	}
  	spin_lock_irqsave(&card->ip_lock, flags);
  	rc = __qeth_l3_insert_ip_todo(card, addr, 1);
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	return rc;
  }
  
  
  struct qeth_ipaddr *qeth_l3_get_addr_buffer(
  				enum qeth_prot_versions prot)
  {
  	struct qeth_ipaddr *addr;
  
  	addr = kzalloc(sizeof(struct qeth_ipaddr), GFP_ATOMIC);
  	if (addr == NULL) {
  		return NULL;
  	}
  	addr->type = QETH_IP_TYPE_NORMAL;
  	addr->proto = prot;
  	return addr;
  }
  
  static void qeth_l3_delete_mc_addresses(struct qeth_card *card)
  {
  	struct qeth_ipaddr *iptodo;
  	unsigned long flags;
  
  	QETH_CARD_TEXT(card, 4, "delmc");
  	iptodo = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
  	if (!iptodo) {
  		QETH_CARD_TEXT(card, 2, "dmcnomem");
  		return;
  	}
  	iptodo->type = QETH_IP_TYPE_DEL_ALL_MC;
  	spin_lock_irqsave(&card->ip_lock, flags);
  	if (!__qeth_l3_insert_ip_todo(card, iptodo, 0))
  		kfree(iptodo);
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  }
  
  /*
   * Add/remove address to/from card's ip list, i.e. try to add or remove
   * reference to/from an IP address that is already registered on the card.
   * Returns:
   *	0  address was on card and its reference count has been adjusted,
   *	   but is still > 0, so nothing has to be done
   *	   also returns 0 if card was not on card and the todo was to delete
   *	   the address -> there is also nothing to be done
   *	1  address was not on card and the todo is to add it to the card's ip
   *	   list
   *	-1 address was on card and its reference count has been decremented
   *	   to <= 0 by the todo -> address must be removed from card
   */
  static int __qeth_l3_ref_ip_on_card(struct qeth_card *card,
  		struct qeth_ipaddr *todo, struct qeth_ipaddr **__addr)
  {
  	struct qeth_ipaddr *addr;
  	int found = 0;
  
  	list_for_each_entry(addr, &card->ip_list, entry) {
  		if ((addr->proto == QETH_PROT_IPV4) &&
  		    (todo->proto == QETH_PROT_IPV4) &&
  		    (addr->type == todo->type) &&
  		    (addr->u.a4.addr == todo->u.a4.addr) &&
  		    (addr->u.a4.mask == todo->u.a4.mask)) {
  			found = 1;
  			break;
  		}
  		if ((addr->proto == QETH_PROT_IPV6) &&
  		    (todo->proto == QETH_PROT_IPV6) &&
  		    (addr->type == todo->type) &&
  		    (addr->u.a6.pfxlen == todo->u.a6.pfxlen) &&
  		    (memcmp(&addr->u.a6.addr, &todo->u.a6.addr,
  			    sizeof(struct in6_addr)) == 0)) {
  			found = 1;
  			break;
  		}
  	}
  	if (found) {
  		addr->users += todo->users;
  		if (addr->users <= 0) {
  			*__addr = addr;
  			return -1;
  		} else {
  			/* for VIPA and RXIP limit refcount to 1 */
  			if (addr->type != QETH_IP_TYPE_NORMAL)
  				addr->users = 1;
  			return 0;
  		}
  	}
  	if (todo->users > 0) {
  		/* for VIPA and RXIP limit refcount to 1 */
  		if (todo->type != QETH_IP_TYPE_NORMAL)
  			todo->users = 1;
  		return 1;
  	} else
  		return 0;
  }
  
  static void __qeth_l3_delete_all_mc(struct qeth_card *card,
  					unsigned long *flags)
  {
  	struct list_head fail_list;
  	struct qeth_ipaddr *addr, *tmp;
  	int rc;
  
  	INIT_LIST_HEAD(&fail_list);
  again:
  	list_for_each_entry_safe(addr, tmp, &card->ip_list, entry) {
  		if (addr->is_multicast) {
  			list_del(&addr->entry);
  			spin_unlock_irqrestore(&card->ip_lock, *flags);
  			rc = qeth_l3_deregister_addr_entry(card, addr);
  			spin_lock_irqsave(&card->ip_lock, *flags);
  			if (!rc || (rc == IPA_RC_MC_ADDR_NOT_FOUND))
  				kfree(addr);
  			else
  				list_add_tail(&addr->entry, &fail_list);
  			goto again;
  		}
  	}
  	list_splice(&fail_list, &card->ip_list);
  }
  
  void qeth_l3_set_ip_addr_list(struct qeth_card *card)
  {
  	struct list_head *tbd_list;
  	struct qeth_ipaddr *todo, *addr;
  	unsigned long flags;
  	int rc;
  
  	QETH_CARD_TEXT(card, 2, "sdiplist");
  	QETH_CARD_HEX(card, 2, &card, sizeof(void *));
  
  	if ((card->state != CARD_STATE_UP &&
  	     card->state != CARD_STATE_SOFTSETUP) || card->options.sniffer) {
  		return;
  	}
  
  	spin_lock_irqsave(&card->ip_lock, flags);
  	tbd_list = card->ip_tbd_list;
  	card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
  	if (!card->ip_tbd_list) {
  		QETH_CARD_TEXT(card, 0, "silnomem");
  		card->ip_tbd_list = tbd_list;
  		spin_unlock_irqrestore(&card->ip_lock, flags);
  		return;
  	} else
  		INIT_LIST_HEAD(card->ip_tbd_list);
  
  	while (!list_empty(tbd_list)) {
  		todo = list_entry(tbd_list->next, struct qeth_ipaddr, entry);
  		list_del(&todo->entry);
  		if (todo->type == QETH_IP_TYPE_DEL_ALL_MC) {
  			__qeth_l3_delete_all_mc(card, &flags);
  			kfree(todo);
  			continue;
  		}
  		rc = __qeth_l3_ref_ip_on_card(card, todo, &addr);
  		if (rc == 0) {
  			/* nothing to be done; only adjusted refcount */
  			kfree(todo);
  		} else if (rc == 1) {
  			/* new entry to be added to on-card list */
  			spin_unlock_irqrestore(&card->ip_lock, flags);
  			rc = qeth_l3_register_addr_entry(card, todo);
  			spin_lock_irqsave(&card->ip_lock, flags);
  			if (!rc || (rc == IPA_RC_LAN_OFFLINE))
  				list_add_tail(&todo->entry, &card->ip_list);
  			else
  				kfree(todo);
  		} else if (rc == -1) {
  			/* on-card entry to be removed */
  			list_del_init(&addr->entry);
  			spin_unlock_irqrestore(&card->ip_lock, flags);
  			rc = qeth_l3_deregister_addr_entry(card, addr);
  			spin_lock_irqsave(&card->ip_lock, flags);
  			if (!rc || (rc == IPA_RC_IP_ADDRESS_NOT_DEFINED))
  				kfree(addr);
  			else
  				list_add_tail(&addr->entry, &card->ip_list);
  			kfree(todo);
  		}
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	kfree(tbd_list);
  }
  
  static void qeth_l3_clear_ip_list(struct qeth_card *card, int recover)
  {
  	struct qeth_ipaddr *addr, *tmp;
  	unsigned long flags;
  
  	QETH_CARD_TEXT(card, 4, "clearip");
  	if (recover && card->options.sniffer)
  		return;
  	spin_lock_irqsave(&card->ip_lock, flags);
  	/* clear todo list */
  	list_for_each_entry_safe(addr, tmp, card->ip_tbd_list, entry) {
  		list_del(&addr->entry);
  		kfree(addr);
  	}
  
  	while (!list_empty(&card->ip_list)) {
  		addr = list_entry(card->ip_list.next,
  				  struct qeth_ipaddr, entry);
  		list_del_init(&addr->entry);
  		if (!recover || addr->is_multicast) {
  			kfree(addr);
  			continue;
  		}
  		list_add_tail(&addr->entry, card->ip_tbd_list);
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  }
  
  static int qeth_l3_address_exists_in_list(struct list_head *list,
  		struct qeth_ipaddr *addr, int same_type)
  {
  	struct qeth_ipaddr *tmp;
  
  	list_for_each_entry(tmp, list, entry) {
  		if ((tmp->proto == QETH_PROT_IPV4) &&
  		    (addr->proto == QETH_PROT_IPV4) &&
  		    ((same_type && (tmp->type == addr->type)) ||
  		    (!same_type && (tmp->type != addr->type))) &&
  		    (tmp->u.a4.addr == addr->u.a4.addr))
  			return 1;
  
  		if ((tmp->proto == QETH_PROT_IPV6) &&
  		    (addr->proto == QETH_PROT_IPV6) &&
  		    ((same_type && (tmp->type == addr->type)) ||
  		    (!same_type && (tmp->type != addr->type))) &&
  		    (memcmp(&tmp->u.a6.addr, &addr->u.a6.addr,
  			    sizeof(struct in6_addr)) == 0))
  			return 1;
  
  	}
  	return 0;
  }
  
  static int qeth_l3_send_setdelmc(struct qeth_card *card,
  			struct qeth_ipaddr *addr, int ipacmd)
  {
  	int rc;
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_CARD_TEXT(card, 4, "setdelmc");
  
  	iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	memcpy(&cmd->data.setdelipm.mac, addr->mac, OSA_ADDR_LEN);
  	if (addr->proto == QETH_PROT_IPV6)
  		memcpy(cmd->data.setdelipm.ip6, &addr->u.a6.addr,
  		       sizeof(struct in6_addr));
  	else
  		memcpy(&cmd->data.setdelipm.ip4, &addr->u.a4.addr, 4);
  
  	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
  
  	return rc;
  }
  
  static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
  {
  	int i, j;
  	for (i = 0; i < 16; i++) {
  		j = (len) - (i * 8);
  		if (j >= 8)
  			netmask[i] = 0xff;
  		else if (j > 0)
  			netmask[i] = (u8)(0xFF00 >> j);
  		else
  			netmask[i] = 0;
  	}
  }
  
  static int qeth_l3_send_setdelip(struct qeth_card *card,
  		struct qeth_ipaddr *addr, int ipacmd, unsigned int flags)
  {
  	int rc;
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  	__u8 netmask[16];
  
  	QETH_CARD_TEXT(card, 4, "setdelip");
  	QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
  
  	iob = qeth_get_ipacmd_buffer(card, ipacmd, addr->proto);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	if (addr->proto == QETH_PROT_IPV6) {
  		memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
  		       sizeof(struct in6_addr));
  		qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
  		memcpy(cmd->data.setdelip6.mask, netmask,
  		       sizeof(struct in6_addr));
  		cmd->data.setdelip6.flags = flags;
  	} else {
  		memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
  		memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
  		cmd->data.setdelip4.flags = flags;
  	}
  
  	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
  
  	return rc;
  }
  
  static int qeth_l3_send_setrouting(struct qeth_card *card,
  	enum qeth_routing_types type, enum qeth_prot_versions prot)
  {
  	int rc;
  	struct qeth_ipa_cmd *cmd;
  	struct qeth_cmd_buffer *iob;
  
  	QETH_CARD_TEXT(card, 4, "setroutg");
  	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETRTG, prot);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	cmd->data.setrtg.type = (type);
  	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
  
  	return rc;
  }
  
  static int qeth_l3_correct_routing_type(struct qeth_card *card,
  		enum qeth_routing_types *type, enum qeth_prot_versions prot)
  {
  	if (card->info.type == QETH_CARD_TYPE_IQD) {
  		switch (*type) {
  		case NO_ROUTER:
  		case PRIMARY_CONNECTOR:
  		case SECONDARY_CONNECTOR:
  		case MULTICAST_ROUTER:
  			return 0;
  		default:
  			goto out_inval;
  		}
  	} else {
  		switch (*type) {
  		case NO_ROUTER:
  		case PRIMARY_ROUTER:
  		case SECONDARY_ROUTER:
  			return 0;
  		case MULTICAST_ROUTER:
  			if (qeth_is_ipafunc_supported(card, prot,
  						      IPA_OSA_MC_ROUTER))
  				return 0;
  		default:
  			goto out_inval;
  		}
  	}
  out_inval:
  	*type = NO_ROUTER;
  	return -EINVAL;
  }
  
  int qeth_l3_setrouting_v4(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "setrtg4");
  
  	rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
  				  QETH_PROT_IPV4);
  	if (rc)
  		return rc;
  
  	rc = qeth_l3_send_setrouting(card, card->options.route4.type,
  				  QETH_PROT_IPV4);
  	if (rc) {
  		card->options.route4.type = NO_ROUTER;
  		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
  			" on %s. Type set to 'no router'.\n", rc,
  			QETH_CARD_IFNAME(card));
  	}
  	return rc;
  }
  
  int qeth_l3_setrouting_v6(struct qeth_card *card)
  {
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 3, "setrtg6");
  #ifdef CONFIG_QETH_IPV6
  
  	if (!qeth_is_supported(card, IPA_IPV6))
  		return 0;
  	rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
  				  QETH_PROT_IPV6);
  	if (rc)
  		return rc;
  
  	rc = qeth_l3_send_setrouting(card, card->options.route6.type,
  				  QETH_PROT_IPV6);
  	if (rc) {
  		card->options.route6.type = NO_ROUTER;
  		QETH_DBF_MESSAGE(2, "Error (0x%04x) while setting routing type"
  			" on %s. Type set to 'no router'.\n", rc,
  			QETH_CARD_IFNAME(card));
  	}
  #endif
  	return rc;
  }
  
  /*
   * IP address takeover related functions
   */
  static void qeth_l3_clear_ipato_list(struct qeth_card *card)
  {
  
  	struct qeth_ipato_entry *ipatoe, *tmp;
  	unsigned long flags;
  
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
  		list_del(&ipatoe->entry);
  		kfree(ipatoe);
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  }
  
  int qeth_l3_add_ipato_entry(struct qeth_card *card,
  				struct qeth_ipato_entry *new)
  {
  	struct qeth_ipato_entry *ipatoe;
  	unsigned long flags;
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 2, "addipato");
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
  		if (ipatoe->proto != new->proto)
  			continue;
  		if (!memcmp(ipatoe->addr, new->addr,
  			    (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
  		    (ipatoe->mask_bits == new->mask_bits)) {
  			rc = -EEXIST;
  			break;
  		}
  	}
  	if (!rc)
  		list_add_tail(&new->entry, &card->ipato.entries);
  
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	return rc;
  }
  
  void qeth_l3_del_ipato_entry(struct qeth_card *card,
  		enum qeth_prot_versions proto, u8 *addr, int mask_bits)
  {
  	struct qeth_ipato_entry *ipatoe, *tmp;
  	unsigned long flags;
  
  	QETH_CARD_TEXT(card, 2, "delipato");
  	spin_lock_irqsave(&card->ip_lock, flags);
  	list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
  		if (ipatoe->proto != proto)
  			continue;
  		if (!memcmp(ipatoe->addr, addr,
  			    (proto == QETH_PROT_IPV4)? 4:16) &&
  		    (ipatoe->mask_bits == mask_bits)) {
  			list_del(&ipatoe->entry);
  			kfree(ipatoe);
  		}
  	}
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  }
  
  /*
   * VIPA related functions
   */
  int qeth_l3_add_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
  	      const u8 *addr)
  {
  	struct qeth_ipaddr *ipaddr;
  	unsigned long flags;
  	int rc = 0;
  
  	ipaddr = qeth_l3_get_addr_buffer(proto);
  	if (ipaddr) {
  		if (proto == QETH_PROT_IPV4) {
  			QETH_CARD_TEXT(card, 2, "addvipa4");
  			memcpy(&ipaddr->u.a4.addr, addr, 4);
  			ipaddr->u.a4.mask = 0;
  		} else if (proto == QETH_PROT_IPV6) {
  			QETH_CARD_TEXT(card, 2, "addvipa6");
  			memcpy(&ipaddr->u.a6.addr, addr, 16);
  			ipaddr->u.a6.pfxlen = 0;
  		}
  		ipaddr->type = QETH_IP_TYPE_VIPA;
  		ipaddr->set_flags = QETH_IPA_SETIP_VIPA_FLAG;
  		ipaddr->del_flags = QETH_IPA_DELIP_VIPA_FLAG;
  	} else
  		return -ENOMEM;
  	spin_lock_irqsave(&card->ip_lock, flags);
  	if (qeth_l3_address_exists_in_list(&card->ip_list, ipaddr, 0) ||
  	    qeth_l3_address_exists_in_list(card->ip_tbd_list, ipaddr, 0))
  		rc = -EEXIST;
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	if (rc) {
  		kfree(ipaddr);
  		return rc;
  	}
  	if (!qeth_l3_add_ip(card, ipaddr))
  		kfree(ipaddr);
  	qeth_l3_set_ip_addr_list(card);
  	return rc;
  }
  
  void qeth_l3_del_vipa(struct qeth_card *card, enum qeth_prot_versions proto,
  	      const u8 *addr)
  {
  	struct qeth_ipaddr *ipaddr;
  
  	ipaddr = qeth_l3_get_addr_buffer(proto);
  	if (ipaddr) {
  		if (proto == QETH_PROT_IPV4) {
  			QETH_CARD_TEXT(card, 2, "delvipa4");
  			memcpy(&ipaddr->u.a4.addr, addr, 4);
  			ipaddr->u.a4.mask = 0;
  		} else if (proto == QETH_PROT_IPV6) {
  			QETH_CARD_TEXT(card, 2, "delvipa6");
  			memcpy(&ipaddr->u.a6.addr, addr, 16);
  			ipaddr->u.a6.pfxlen = 0;
  		}
  		ipaddr->type = QETH_IP_TYPE_VIPA;
  	} else
  		return;
  	if (!qeth_l3_delete_ip(card, ipaddr))
  		kfree(ipaddr);
  	qeth_l3_set_ip_addr_list(card);
  }
  
  /*
   * proxy ARP related functions
   */
  int qeth_l3_add_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
  	      const u8 *addr)
  {
  	struct qeth_ipaddr *ipaddr;
  	unsigned long flags;
  	int rc = 0;
  
  	ipaddr = qeth_l3_get_addr_buffer(proto);
  	if (ipaddr) {
  		if (proto == QETH_PROT_IPV4) {
  			QETH_CARD_TEXT(card, 2, "addrxip4");
  			memcpy(&ipaddr->u.a4.addr, addr, 4);
  			ipaddr->u.a4.mask = 0;
  		} else if (proto == QETH_PROT_IPV6) {
  			QETH_CARD_TEXT(card, 2, "addrxip6");
  			memcpy(&ipaddr->u.a6.addr, addr, 16);
  			ipaddr->u.a6.pfxlen = 0;
  		}
  		ipaddr->type = QETH_IP_TYPE_RXIP;
  		ipaddr->set_flags = QETH_IPA_SETIP_TAKEOVER_FLAG;
  		ipaddr->del_flags = 0;
  	} else
  		return -ENOMEM;
  	spin_lock_irqsave(&card->ip_lock, flags);
  	if (qeth_l3_address_exists_in_list(&card->ip_list, ipaddr, 0) ||
  	    qeth_l3_address_exists_in_list(card->ip_tbd_list, ipaddr, 0))
  		rc = -EEXIST;
  	spin_unlock_irqrestore(&card->ip_lock, flags);
  	if (rc) {
  		kfree(ipaddr);
  		return rc;
  	}
  	if (!qeth_l3_add_ip(card, ipaddr))
  		kfree(ipaddr);
  	qeth_l3_set_ip_addr_list(card);
  	return 0;
  }
  
  void qeth_l3_del_rxip(struct qeth_card *card, enum qeth_prot_versions proto,
  			const u8 *addr)
  {
  	struct qeth_ipaddr *ipaddr;
  
  	ipaddr = qeth_l3_get_addr_buffer(proto);
  	if (ipaddr) {
  		if (proto == QETH_PROT_IPV4) {
  			QETH_CARD_TEXT(card, 2, "addrxip4");
  			memcpy(&ipaddr->u.a4.addr, addr, 4);
  			ipaddr->u.a4.mask = 0;
  		} else if (proto == QETH_PROT_IPV6) {
  			QETH_CARD_TEXT(card, 2, "addrxip6");
  			memcpy(&ipaddr->u.a6.addr, addr, 16);
  			ipaddr->u.a6.pfxlen = 0;
  		}
  		ipaddr->type = QETH_IP_TYPE_RXIP;
  	} else
  		return;
  	if (!qeth_l3_delete_ip(card, ipaddr))
  		kfree(ipaddr);
  	qeth_l3_set_ip_addr_list(card);
  }
  
  static int qeth_l3_register_addr_entry(struct qeth_card *card,
  				struct qeth_ipaddr *addr)
  {
  	char buf[50];
  	int rc = 0;
  	int cnt = 3;
  
  	if (addr->proto == QETH_PROT_IPV4) {
  		QETH_CARD_TEXT(card, 2, "setaddr4");
  		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
  	} else if (addr->proto == QETH_PROT_IPV6) {
  		QETH_CARD_TEXT(card, 2, "setaddr6");
  		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
  		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
  	} else {
  		QETH_CARD_TEXT(card, 2, "setaddr?");
  		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
  	}
  	do {
  		if (addr->is_multicast)
  			rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
  		else
  			rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP,
  					addr->set_flags);
  		if (rc)
  			QETH_CARD_TEXT(card, 2, "failed");
  	} while ((--cnt > 0) && rc);
  	if (rc) {
  		QETH_CARD_TEXT(card, 2, "FAILED");
  		qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
  		dev_warn(&card->gdev->dev,
  			"Registering IP address %s failed\n", buf);
  	}
  	return rc;
  }
  
  static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
  						struct qeth_ipaddr *addr)
  {
  	int rc = 0;
  
  	if (addr->proto == QETH_PROT_IPV4) {
  		QETH_CARD_TEXT(card, 2, "deladdr4");
  		QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
  	} else if (addr->proto == QETH_PROT_IPV6) {
  		QETH_CARD_TEXT(card, 2, "deladdr6");
  		QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
  		QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
  	} else {
  		QETH_CARD_TEXT(card, 2, "deladdr?");
  		QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
  	}
  	if (addr->is_multicast)
  		rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
  	else
  		rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP,
  					addr->del_flags);
  	if (rc)
  		QETH_CARD_TEXT(card, 2, "failed");
  
  	return rc;
  }
  
  static inline u8 qeth_l3_get_qeth_hdr_flags4(int cast_type)
  {
  	if (cast_type == RTN_MULTICAST)
  		return QETH_CAST_MULTICAST;
  	if (cast_type == RTN_BROADCAST)
  		return QETH_CAST_BROADCAST;
  	return QETH_CAST_UNICAST;
  }
  
  static inline u8 qeth_l3_get_qeth_hdr_flags6(int cast_type)
  {
  	u8 ct = QETH_HDR_PASSTHRU | QETH_HDR_IPV6;
  	if (cast_type == RTN_MULTICAST)
  		return ct | QETH_CAST_MULTICAST;
  	if (cast_type == RTN_ANYCAST)
  		return ct | QETH_CAST_ANYCAST;
  	if (cast_type == RTN_BROADCAST)
  		return ct | QETH_CAST_BROADCAST;
  	return ct | QETH_CAST_UNICAST;
  }
  
  static int qeth_l3_setadapter_parms(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_DBF_TEXT(SETUP, 2, "setadprm");
  
  	if (!qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
  		dev_info(&card->gdev->dev,
  			"set adapter parameters not supported.\n");
  		QETH_DBF_TEXT(SETUP, 2, " notsupp");
  		return 0;
  	}
  	rc = qeth_query_setadapterparms(card);
  	if (rc) {
  		QETH_DBF_MESSAGE(2, "%s couldn't set adapter parameters: "
  			"0x%x\n", dev_name(&card->gdev->dev), rc);
  		return rc;
  	}
  	if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
  		rc = qeth_setadpparms_change_macaddr(card);
  		if (rc)
  			dev_warn(&card->gdev->dev, "Reading the adapter MAC"
  				" address failed\n");
  	}
  
  	return rc;
  }
  
  static int qeth_l3_default_setassparms_cb(struct qeth_card *card,
  			struct qeth_reply *reply, unsigned long data)
  {
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_CARD_TEXT(card, 4, "defadpcb");
  
  	cmd = (struct qeth_ipa_cmd *) data;
  	if (cmd->hdr.return_code == 0) {
  		cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
  		if (cmd->hdr.prot_version == QETH_PROT_IPV4)
  			card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
  		if (cmd->hdr.prot_version == QETH_PROT_IPV6)
  			card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
  	}
  	if (cmd->data.setassparms.hdr.assist_no == IPA_INBOUND_CHECKSUM &&
  	    cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
  		card->info.csum_mask = cmd->data.setassparms.data.flags_32bit;
  		QETH_CARD_TEXT_(card, 3, "csum:%d", card->info.csum_mask);
  	}
  	if (cmd->data.setassparms.hdr.assist_no == IPA_OUTBOUND_CHECKSUM &&
  	    cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
  		card->info.tx_csum_mask =
  			cmd->data.setassparms.data.flags_32bit;
  		QETH_CARD_TEXT_(card, 3, "tcsu:%d", card->info.tx_csum_mask);
  	}
  
  	return 0;
  }
  
  static struct qeth_cmd_buffer *qeth_l3_get_setassparms_cmd(
  	struct qeth_card *card, enum qeth_ipa_funcs ipa_func, __u16 cmd_code,
  	__u16 len, enum qeth_prot_versions prot)
  {
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_CARD_TEXT(card, 4, "getasscm");
  	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
  
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	cmd->data.setassparms.hdr.assist_no = ipa_func;
  	cmd->data.setassparms.hdr.length = 8 + len;
  	cmd->data.setassparms.hdr.command_code = cmd_code;
  	cmd->data.setassparms.hdr.return_code = 0;
  	cmd->data.setassparms.hdr.seq_no = 0;
  
  	return iob;
  }
  
  static int qeth_l3_send_setassparms(struct qeth_card *card,
  	struct qeth_cmd_buffer *iob, __u16 len, long data,
  	int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
  		unsigned long),
  	void *reply_param)
  {
  	int rc;
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_CARD_TEXT(card, 4, "sendassp");
  
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	if (len <= sizeof(__u32))
  		cmd->data.setassparms.data.flags_32bit = (__u32) data;
  	else   /* (len > sizeof(__u32)) */
  		memcpy(&cmd->data.setassparms.data, (void *) data, len);
  
  	rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
  	return rc;
  }
  
  #ifdef CONFIG_QETH_IPV6
  static int qeth_l3_send_simple_setassparms_ipv6(struct qeth_card *card,
  		enum qeth_ipa_funcs ipa_func, __u16 cmd_code)
  {
  	int rc;
  	struct qeth_cmd_buffer *iob;
  
  	QETH_CARD_TEXT(card, 4, "simassp6");
  	iob = qeth_l3_get_setassparms_cmd(card, ipa_func, cmd_code,
  				       0, QETH_PROT_IPV6);
  	rc = qeth_l3_send_setassparms(card, iob, 0, 0,
  				   qeth_l3_default_setassparms_cb, NULL);
  	return rc;
  }
  #endif
  
  static int qeth_l3_send_simple_setassparms(struct qeth_card *card,
  		enum qeth_ipa_funcs ipa_func, __u16 cmd_code, long data)
  {
  	int rc;
  	int length = 0;
  	struct qeth_cmd_buffer *iob;
  
  	QETH_CARD_TEXT(card, 4, "simassp4");
  	if (data)
  		length = sizeof(__u32);
  	iob = qeth_l3_get_setassparms_cmd(card, ipa_func, cmd_code,
  				       length, QETH_PROT_IPV4);
  	rc = qeth_l3_send_setassparms(card, iob, length, data,
  				   qeth_l3_default_setassparms_cb, NULL);
  	return rc;
  }
  
  static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "ipaarp");
  
  	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
  		dev_info(&card->gdev->dev,
  			"ARP processing not supported on %s!\n",
  			QETH_CARD_IFNAME(card));
  		return 0;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
  					IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Starting ARP processing support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  	}
  	return rc;
  }
  
  static int qeth_l3_start_ipa_ip_fragmentation(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "ipaipfrg");
  
  	if (!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) {
  		dev_info(&card->gdev->dev,
  			"Hardware IP fragmentation not supported on %s\n",
  			QETH_CARD_IFNAME(card));
  		return  -EOPNOTSUPP;
  	}
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_IP_FRAGMENTATION,
  					  IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Starting IP fragmentation support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  	} else
  		dev_info(&card->gdev->dev,
  			"Hardware IP fragmentation enabled \n");
  	return rc;
  }
  
  static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "stsrcmac");
  
  	if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
  		dev_info(&card->gdev->dev,
  			"Inbound source MAC-address not supported on %s\n",
  			QETH_CARD_IFNAME(card));
  		return -EOPNOTSUPP;
  	}
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_SOURCE_MAC,
  					  IPA_CMD_ASS_START, 0);
  	if (rc)
  		dev_warn(&card->gdev->dev,
  			"Starting source MAC-address support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  	return rc;
  }
  
  static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
  {
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 3, "strtvlan");
  
  	if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
  		dev_info(&card->gdev->dev,
  			"VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
  		return -EOPNOTSUPP;
  	}
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_VLAN_PRIO,
  					  IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Starting VLAN support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  	} else {
  		dev_info(&card->gdev->dev, "VLAN enabled\n");
  	}
  	return rc;
  }
  
  static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "stmcast");
  
  	if (!qeth_is_supported(card, IPA_MULTICASTING)) {
  		dev_info(&card->gdev->dev,
  			"Multicast not supported on %s\n",
  			QETH_CARD_IFNAME(card));
  		return -EOPNOTSUPP;
  	}
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_MULTICASTING,
  					  IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Starting multicast support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  	} else {
  		dev_info(&card->gdev->dev, "Multicast enabled\n");
  		card->dev->flags |= IFF_MULTICAST;
  	}
  	return rc;
  }
  
  #ifdef CONFIG_QETH_IPV6
  static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "softipv6");
  
  	if (card->info.type == QETH_CARD_TYPE_IQD)
  		goto out;
  
  	rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
  	if (rc) {
  		dev_err(&card->gdev->dev,
  			"Activating IPv6 support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  		return rc;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_IPV6,
  					  IPA_CMD_ASS_START, 3);
  	if (rc) {
  		dev_err(&card->gdev->dev,
  			"Activating IPv6 support for %s failed\n",
  			QETH_CARD_IFNAME(card));
  		return rc;
  	}
  	rc = qeth_l3_send_simple_setassparms_ipv6(card, IPA_IPV6,
  					       IPA_CMD_ASS_START);
  	if (rc) {
  		dev_err(&card->gdev->dev,
  			"Activating IPv6 support for %s failed\n",
  			 QETH_CARD_IFNAME(card));
  		return rc;
  	}
  	rc = qeth_l3_send_simple_setassparms_ipv6(card, IPA_PASSTHRU,
  					       IPA_CMD_ASS_START);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Enabling the passthrough mode for %s failed\n",
  			QETH_CARD_IFNAME(card));
  		return rc;
  	}
  out:
  	dev_info(&card->gdev->dev, "IPV6 enabled\n");
  	return 0;
  }
  #endif
  
  static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
  {
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 3, "strtipv6");
  
  	if (!qeth_is_supported(card, IPA_IPV6)) {
  		dev_info(&card->gdev->dev,
  			"IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
  		return 0;
  	}
  #ifdef CONFIG_QETH_IPV6
  	rc = qeth_l3_softsetup_ipv6(card);
  #endif
  	return rc ;
  }
  
  static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "stbrdcst");
  	card->info.broadcast_capable = 0;
  	if (!qeth_is_supported(card, IPA_FILTERING)) {
  		dev_info(&card->gdev->dev,
  			"Broadcast not supported on %s\n",
  			QETH_CARD_IFNAME(card));
  		rc = -EOPNOTSUPP;
  		goto out;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
  					  IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
  			"%s failed\n", QETH_CARD_IFNAME(card));
  		goto out;
  	}
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
  					  IPA_CMD_ASS_CONFIGURE, 1);
  	if (rc) {
  		dev_warn(&card->gdev->dev,
  			"Setting up broadcast filtering for %s failed\n",
  			QETH_CARD_IFNAME(card));
  		goto out;
  	}
  	card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
  	dev_info(&card->gdev->dev, "Broadcast enabled\n");
  	rc = qeth_l3_send_simple_setassparms(card, IPA_FILTERING,
  					  IPA_CMD_ASS_ENABLE, 1);
  	if (rc) {
  		dev_warn(&card->gdev->dev, "Setting up broadcast echo "
  			"filtering for %s failed\n", QETH_CARD_IFNAME(card));
  		goto out;
  	}
  	card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
  out:
  	if (card->info.broadcast_capable)
  		card->dev->flags |= IFF_BROADCAST;
  	else
  		card->dev->flags &= ~IFF_BROADCAST;
  	return rc;
  }
  
  static int qeth_l3_send_checksum_command(struct qeth_card *card)
  {
  	int rc;
  
  	rc = qeth_l3_send_simple_setassparms(card, IPA_INBOUND_CHECKSUM,
  					  IPA_CMD_ASS_START, 0);
  	if (rc) {
  		dev_warn(&card->gdev->dev, "Starting HW checksumming for %s "
  			"failed, using SW checksumming\n",
  			QETH_CARD_IFNAME(card));
  		return rc;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_INBOUND_CHECKSUM,
  					  IPA_CMD_ASS_ENABLE,
  					  card->info.csum_mask);
  	if (rc) {
  		dev_warn(&card->gdev->dev, "Enabling HW checksumming for %s "
  			"failed, using SW checksumming\n",
  			QETH_CARD_IFNAME(card));
  		return rc;
  	}
  	return 0;
  }
  
  static int qeth_l3_set_rx_csum(struct qeth_card *card, int on)
  {
  	int rc = 0;
  
  	if (on) {
  		rc = qeth_l3_send_checksum_command(card);
  		if (rc)
  			return -EIO;
  		dev_info(&card->gdev->dev,
  			"HW Checksumming (inbound) enabled\n");
  	} else {
  		rc = qeth_l3_send_simple_setassparms(card,
  			IPA_INBOUND_CHECKSUM, IPA_CMD_ASS_STOP, 0);
  		if (rc)
  			return -EIO;
  	}
  
  	return 0;
  }
  
  static int qeth_l3_start_ipa_checksum(struct qeth_card *card)
  {
  	QETH_CARD_TEXT(card, 3, "strtcsum");
  
  	if (card->dev->features & NETIF_F_RXCSUM) {
  		rtnl_lock();
  		/* force set_features call */
  		card->dev->features &= ~NETIF_F_RXCSUM;
  		netdev_update_features(card->dev);
  		rtnl_unlock();
  	}
  	return 0;
  }
  
  static int qeth_l3_start_ipa_tx_checksum(struct qeth_card *card)
  {
  	int rc = 0;
  
  	if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
  		return rc;
  	rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_CHECKSUM,
  			  IPA_CMD_ASS_START, 0);
  	if (rc)
  		goto err_out;
  	rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_CHECKSUM,
  			  IPA_CMD_ASS_ENABLE, card->info.tx_csum_mask);
  	if (rc)
  		goto err_out;
  	dev_info(&card->gdev->dev, "HW TX Checksumming enabled\n");
  	return rc;
  err_out:
  	dev_warn(&card->gdev->dev, "Enabling HW TX checksumming for %s "
  		"failed, using SW TX checksumming\n", QETH_CARD_IFNAME(card));
  	return rc;
  }
  
  static int qeth_l3_start_ipa_tso(struct qeth_card *card)
  {
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "sttso");
  
  	if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
  		dev_info(&card->gdev->dev,
  			"Outbound TSO not supported on %s\n",
  			QETH_CARD_IFNAME(card));
  		rc = -EOPNOTSUPP;
  	} else {
  		rc = qeth_l3_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
  						IPA_CMD_ASS_START, 0);
  		if (rc)
  			dev_warn(&card->gdev->dev, "Starting outbound TCP "
  				"segmentation offload for %s failed\n",
  				QETH_CARD_IFNAME(card));
  		else
  			dev_info(&card->gdev->dev,
  				"Outbound TSO enabled\n");
  	}
  	if (rc)
  		card->dev->features &= ~NETIF_F_TSO;
  	return rc;
  }
  
  static int qeth_l3_start_ipassists(struct qeth_card *card)
  {
  	QETH_CARD_TEXT(card, 3, "strtipas");
  
  	if (qeth_set_access_ctrl_online(card, 0))
  		return -EIO;
  	qeth_l3_start_ipa_arp_processing(card);	/* go on*/
  	qeth_l3_start_ipa_ip_fragmentation(card);	/* go on*/
  	qeth_l3_start_ipa_source_mac(card);	/* go on*/
  	qeth_l3_start_ipa_vlan(card);		/* go on*/
  	qeth_l3_start_ipa_multicast(card);		/* go on*/
  	qeth_l3_start_ipa_ipv6(card);		/* go on*/
  	qeth_l3_start_ipa_broadcast(card);		/* go on*/
  	qeth_l3_start_ipa_checksum(card);		/* go on*/
  	qeth_l3_start_ipa_tx_checksum(card);
  	qeth_l3_start_ipa_tso(card);		/* go on*/
  	return 0;
  }
  
  static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
  		struct qeth_reply *reply, unsigned long data)
  {
  	struct qeth_ipa_cmd *cmd;
  
  	cmd = (struct qeth_ipa_cmd *) data;
  	if (cmd->hdr.return_code == 0)
  		memcpy(card->dev->dev_addr,
  			cmd->data.create_destroy_addr.unique_id, ETH_ALEN);
  	else
  		eth_random_addr(card->dev->dev_addr);
  
  	return 0;
  }
  
  static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
  {
  	int rc = 0;
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_DBF_TEXT(SETUP, 2, "hsrmac");
  
  	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
  				     QETH_PROT_IPV6);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
  			card->info.unique_id;
  
  	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
  				NULL);
  	return rc;
  }
  
  static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
  		struct qeth_reply *reply, unsigned long data)
  {
  	struct qeth_ipa_cmd *cmd;
  
  	cmd = (struct qeth_ipa_cmd *) data;
  	if (cmd->hdr.return_code == 0)
  		card->info.unique_id = *((__u16 *)
  				&cmd->data.create_destroy_addr.unique_id[6]);
  	else {
  		card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
  					UNIQUE_ID_NOT_BY_CARD;
  		dev_warn(&card->gdev->dev, "The network adapter failed to "
  			"generate a unique ID\n");
  	}
  	return 0;
  }
  
  static int qeth_l3_get_unique_id(struct qeth_card *card)
  {
  	int rc = 0;
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  
  	QETH_DBF_TEXT(SETUP, 2, "guniqeid");
  
  	if (!qeth_is_supported(card, IPA_IPV6)) {
  		card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
  					UNIQUE_ID_NOT_BY_CARD;
  		return 0;
  	}
  
  	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_CREATE_ADDR,
  				     QETH_PROT_IPV6);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	*((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
  			card->info.unique_id;
  
  	rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
  	return rc;
  }
  
  static int
  qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
  			    unsigned long data)
  {
  	struct qeth_ipa_cmd	   *cmd;
  	__u16 rc;
  
  	QETH_DBF_TEXT(SETUP, 2, "diastrcb");
  
  	cmd = (struct qeth_ipa_cmd *)data;
  	rc = cmd->hdr.return_code;
  	if (rc)
  		QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
  	switch (cmd->data.diagass.action) {
  	case QETH_DIAGS_CMD_TRACE_QUERY:
  		break;
  	case QETH_DIAGS_CMD_TRACE_DISABLE:
  		switch (rc) {
  		case 0:
  		case IPA_RC_INVALID_SUBCMD:
  			card->info.promisc_mode = SET_PROMISC_MODE_OFF;
  			dev_info(&card->gdev->dev, "The HiperSockets network "
  				"traffic analyzer is deactivated\n");
  			break;
  		default:
  			break;
  		}
  		break;
  	case QETH_DIAGS_CMD_TRACE_ENABLE:
  		switch (rc) {
  		case 0:
  			card->info.promisc_mode = SET_PROMISC_MODE_ON;
  			dev_info(&card->gdev->dev, "The HiperSockets network "
  				"traffic analyzer is activated\n");
  			break;
  		case IPA_RC_HARDWARE_AUTH_ERROR:
  			dev_warn(&card->gdev->dev, "The device is not "
  				"authorized to run as a HiperSockets network "
  				"traffic analyzer\n");
  			break;
  		case IPA_RC_TRACE_ALREADY_ACTIVE:
  			dev_warn(&card->gdev->dev, "A HiperSockets "
  				"network traffic analyzer is already "
  				"active in the HiperSockets LAN\n");
  			break;
  		default:
  			break;
  		}
  		break;
  	default:
  		QETH_DBF_MESSAGE(2, "Unknown sniffer action (0x%04x) on %s\n",
  			cmd->data.diagass.action, QETH_CARD_IFNAME(card));
  	}
  
  	return 0;
  }
  
  static int
  qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
  {
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd    *cmd;
  
  	QETH_DBF_TEXT(SETUP, 2, "diagtrac");
  
  	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	cmd->data.diagass.subcmd_len = 16;
  	cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRACE;
  	cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
  	cmd->data.diagass.action = diags_cmd;
  	return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
  }
  
  static void qeth_l3_get_mac_for_ipm(__u32 ipm, char *mac,
  				struct net_device *dev)
  {
  	ip_eth_mc_map(ipm, mac);
  }
  
  static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev)
  {
  	struct qeth_ipaddr *ipm;
  	struct ip_mc_list *im4;
  	char buf[MAX_ADDR_LEN];
  
  	QETH_CARD_TEXT(card, 4, "addmc");
  	for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
  	     im4 = rcu_dereference(im4->next_rcu)) {
  		qeth_l3_get_mac_for_ipm(im4->multiaddr, buf, in4_dev->dev);
  		ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
  		if (!ipm)
  			continue;
  		ipm->u.a4.addr = im4->multiaddr;
  		memcpy(ipm->mac, buf, OSA_ADDR_LEN);
  		ipm->is_multicast = 1;
  		if (!qeth_l3_add_ip(card, ipm))
  			kfree(ipm);
  	}
  }
  
  /* called with rcu_read_lock */
  static void qeth_l3_add_vlan_mc(struct qeth_card *card)
  {
  	struct in_device *in_dev;
  	u16 vid;
  
  	QETH_CARD_TEXT(card, 4, "addmcvl");
  	if (!qeth_is_supported(card, IPA_FULL_VLAN))
  		return;
  
  	for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
  		struct net_device *netdev;
  
  		netdev = __vlan_find_dev_deep(card->dev, htons(ETH_P_8021Q),
  					      vid);
  		if (netdev == NULL ||
  		    !(netdev->flags & IFF_UP))
  			continue;
  		in_dev = __in_dev_get_rcu(netdev);
  		if (!in_dev)
  			continue;
  		qeth_l3_add_mc(card, in_dev);
  	}
  }
  
  static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
  {
  	struct in_device *in4_dev;
  
  	QETH_CARD_TEXT(card, 4, "chkmcv4");
  	rcu_read_lock();
  	in4_dev = __in_dev_get_rcu(card->dev);
  	if (in4_dev == NULL)
  		goto unlock;
  	qeth_l3_add_mc(card, in4_dev);
  	qeth_l3_add_vlan_mc(card);
  unlock:
  	rcu_read_unlock();
  }
  
  #ifdef CONFIG_QETH_IPV6
  static void qeth_l3_add_mc6(struct qeth_card *card, struct inet6_dev *in6_dev)
  {
  	struct qeth_ipaddr *ipm;
  	struct ifmcaddr6 *im6;
  	char buf[MAX_ADDR_LEN];
  
  	QETH_CARD_TEXT(card, 4, "addmc6");
  	for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
  		ndisc_mc_map(&im6->mca_addr, buf, in6_dev->dev, 0);
  		ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
  		if (!ipm)
  			continue;
  		ipm->is_multicast = 1;
  		memcpy(ipm->mac, buf, OSA_ADDR_LEN);
  		memcpy(&ipm->u.a6.addr, &im6->mca_addr.s6_addr,
  		       sizeof(struct in6_addr));
  		if (!qeth_l3_add_ip(card, ipm))
  			kfree(ipm);
  	}
  }
  
  /* called with rcu_read_lock */
  static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
  {
  	struct inet6_dev *in_dev;
  	u16 vid;
  
  	QETH_CARD_TEXT(card, 4, "admc6vl");
  	if (!qeth_is_supported(card, IPA_FULL_VLAN))
  		return;
  
  	for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
  		struct net_device *netdev;
  
  		netdev = __vlan_find_dev_deep(card->dev, htons(ETH_P_8021Q),
  					      vid);
  		if (netdev == NULL ||
  		    !(netdev->flags & IFF_UP))
  			continue;
  		in_dev = in6_dev_get(netdev);
  		if (!in_dev)
  			continue;
  		read_lock_bh(&in_dev->lock);
  		qeth_l3_add_mc6(card, in_dev);
  		read_unlock_bh(&in_dev->lock);
  		in6_dev_put(in_dev);
  	}
  }
  
  static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
  {
  	struct inet6_dev *in6_dev;
  
  	QETH_CARD_TEXT(card, 4, "chkmcv6");
  	if (!qeth_is_supported(card, IPA_IPV6))
  		return ;
  	in6_dev = in6_dev_get(card->dev);
  	if (in6_dev == NULL)
  		return;
  	rcu_read_lock();
  	read_lock_bh(&in6_dev->lock);
  	qeth_l3_add_mc6(card, in6_dev);
  	qeth_l3_add_vlan_mc6(card);
  	read_unlock_bh(&in6_dev->lock);
  	rcu_read_unlock();
  	in6_dev_put(in6_dev);
  }
  #endif /* CONFIG_QETH_IPV6 */
  
  static void qeth_l3_free_vlan_addresses4(struct qeth_card *card,
  			unsigned short vid)
  {
  	struct in_device *in_dev;
  	struct in_ifaddr *ifa;
  	struct qeth_ipaddr *addr;
  	struct net_device *netdev;
  
  	QETH_CARD_TEXT(card, 4, "frvaddr4");
  
  	netdev = __vlan_find_dev_deep(card->dev, htons(ETH_P_8021Q), vid);
  	if (!netdev)
  		return;
  	in_dev = in_dev_get(netdev);
  	if (!in_dev)
  		return;
  	for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
  		addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
  		if (addr) {
  			addr->u.a4.addr = ifa->ifa_address;
  			addr->u.a4.mask = ifa->ifa_mask;
  			addr->type = QETH_IP_TYPE_NORMAL;
  			if (!qeth_l3_delete_ip(card, addr))
  				kfree(addr);
  		}
  	}
  	in_dev_put(in_dev);
  }
  
  static void qeth_l3_free_vlan_addresses6(struct qeth_card *card,
  			unsigned short vid)
  {
  #ifdef CONFIG_QETH_IPV6
  	struct inet6_dev *in6_dev;
  	struct inet6_ifaddr *ifa;
  	struct qeth_ipaddr *addr;
  	struct net_device *netdev;
  
  	QETH_CARD_TEXT(card, 4, "frvaddr6");
  
  	netdev = __vlan_find_dev_deep(card->dev, htons(ETH_P_8021Q), vid);
  	if (!netdev)
  		return;
  	in6_dev = in6_dev_get(netdev);
  	if (!in6_dev)
  		return;
  	list_for_each_entry(ifa, &in6_dev->addr_list, if_list) {
  		addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
  		if (addr) {
  			memcpy(&addr->u.a6.addr, &ifa->addr,
  			       sizeof(struct in6_addr));
  			addr->u.a6.pfxlen = ifa->prefix_len;
  			addr->type = QETH_IP_TYPE_NORMAL;
  			if (!qeth_l3_delete_ip(card, addr))
  				kfree(addr);
  		}
  	}
  	in6_dev_put(in6_dev);
  #endif /* CONFIG_QETH_IPV6 */
  }
  
  static void qeth_l3_free_vlan_addresses(struct qeth_card *card,
  			unsigned short vid)
  {
  	rcu_read_lock();
  	qeth_l3_free_vlan_addresses4(card, vid);
  	qeth_l3_free_vlan_addresses6(card, vid);
  	rcu_read_unlock();
  }
  
  static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
  				   __be16 proto, u16 vid)
  {
  	struct qeth_card *card = dev->ml_priv;
  
  	set_bit(vid, card->active_vlans);
  	return 0;
  }
  
  static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
  				    __be16 proto, u16 vid)
  {
  	struct qeth_card *card = dev->ml_priv;
  	unsigned long flags;
  
  	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
  	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
  		QETH_CARD_TEXT(card, 3, "kidREC");
  		return 0;
  	}
  	spin_lock_irqsave(&card->vlanlock, flags);
  	/* unregister IP addresses of vlan device */
  	qeth_l3_free_vlan_addresses(card, vid);
  	clear_bit(vid, card->active_vlans);
  	spin_unlock_irqrestore(&card->vlanlock, flags);
  	qeth_l3_set_multicast_list(card->dev);
  	return 0;
  }
  
  static inline int qeth_l3_rebuild_skb(struct qeth_card *card,
  			struct sk_buff *skb, struct qeth_hdr *hdr,
  			unsigned short *vlan_id)
  {
  	__be16 prot;
  	struct iphdr *ip_hdr;
  	unsigned char tg_addr[MAX_ADDR_LEN];
  	int is_vlan = 0;
  
  	if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
  		prot = htons((hdr->hdr.l3.flags & QETH_HDR_IPV6)? ETH_P_IPV6 :
  			      ETH_P_IP);
  		switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
  		case QETH_CAST_MULTICAST:
  			switch (prot) {
  #ifdef CONFIG_QETH_IPV6
  			case __constant_htons(ETH_P_IPV6):
  				ndisc_mc_map((struct in6_addr *)
  				     skb->data + 24,
  				     tg_addr, card->dev, 0);
  				break;
  #endif
  			case __constant_htons(ETH_P_IP):
  				ip_hdr = (struct iphdr *)skb->data;
  				ip_eth_mc_map(ip_hdr->daddr, tg_addr);
  				break;
  			default:
  				memcpy(tg_addr, card->dev->broadcast,
  					card->dev->addr_len);
  			}
  			card->stats.multicast++;
  			skb->pkt_type = PACKET_MULTICAST;
  			break;
  		case QETH_CAST_BROADCAST:
  			memcpy(tg_addr, card->dev->broadcast,
  				card->dev->addr_len);
  			card->stats.multicast++;
  			skb->pkt_type = PACKET_BROADCAST;
  			break;
  		case QETH_CAST_UNICAST:
  		case QETH_CAST_ANYCAST:
  		case QETH_CAST_NOCAST:
  		default:
  			if (card->options.sniffer)
  				skb->pkt_type = PACKET_OTHERHOST;
  			else
  				skb->pkt_type = PACKET_HOST;
  			memcpy(tg_addr, card->dev->dev_addr,
  				card->dev->addr_len);
  		}
  		if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
  			card->dev->header_ops->create(skb, card->dev, prot,
  				tg_addr, &hdr->hdr.l3.dest_addr[2],
  				card->dev->addr_len);
  		else
  			card->dev->header_ops->create(skb, card->dev, prot,
  				tg_addr, "FAKELL", card->dev->addr_len);
  	}
  
  	skb->protocol = eth_type_trans(skb, card->dev);
  
  	if (hdr->hdr.l3.ext_flags &
  	    (QETH_HDR_EXT_VLAN_FRAME | QETH_HDR_EXT_INCLUDE_VLAN_TAG)) {
  		*vlan_id = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
  		 hdr->hdr.l3.vlan_id : *((u16 *)&hdr->hdr.l3.dest_addr[12]);
  		is_vlan = 1;
  	}
  
  	if (card->dev->features & NETIF_F_RXCSUM) {
  		if ((hdr->hdr.l3.ext_flags &
  		    (QETH_HDR_EXT_CSUM_HDR_REQ |
  		     QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
  		    (QETH_HDR_EXT_CSUM_HDR_REQ |
  		     QETH_HDR_EXT_CSUM_TRANSP_REQ))
  			skb->ip_summed = CHECKSUM_UNNECESSARY;
  		else
  			skb->ip_summed = CHECKSUM_NONE;
  	} else
  		skb->ip_summed = CHECKSUM_NONE;
  
  	return is_vlan;
  }
  
  static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
  				int budget, int *done)
  {
  	int work_done = 0;
  	struct sk_buff *skb;
  	struct qeth_hdr *hdr;
  	__u16 vlan_tag = 0;
  	int is_vlan;
  	unsigned int len;
  	__u16 magic;
  
  	*done = 0;
  	WARN_ON_ONCE(!budget);
  	while (budget) {
  		skb = qeth_core_get_next_skb(card,
  			&card->qdio.in_q->bufs[card->rx.b_index],
  			&card->rx.b_element, &card->rx.e_offset, &hdr);
  		if (!skb) {
  			*done = 1;
  			break;
  		}
  		skb->dev = card->dev;
  		switch (hdr->hdr.l3.id) {
  		case QETH_HEADER_TYPE_LAYER3:
  			magic = *(__u16 *)skb->data;
  			if ((card->info.type == QETH_CARD_TYPE_IQD) &&
  			    (magic == ETH_P_AF_IUCV)) {
  				skb->protocol = ETH_P_AF_IUCV;
  				skb->pkt_type = PACKET_HOST;
  				skb->mac_header = NET_SKB_PAD;
  				skb->dev = card->dev;
  				len = skb->len;
  				card->dev->header_ops->create(skb, card->dev, 0,
  					card->dev->dev_addr, "FAKELL",
  					card->dev->addr_len);
  				netif_receive_skb(skb);
  			} else {
  				is_vlan = qeth_l3_rebuild_skb(card, skb, hdr,
  						      &vlan_tag);
  				len = skb->len;
  				if (is_vlan && !card->options.sniffer)
  					__vlan_hwaccel_put_tag(skb,
  						htons(ETH_P_8021Q), vlan_tag);
  				napi_gro_receive(&card->napi, skb);
  			}
  			break;
  		case QETH_HEADER_TYPE_LAYER2: /* for HiperSockets sniffer */
  			skb->pkt_type = PACKET_HOST;
  			skb->protocol = eth_type_trans(skb, skb->dev);
  			len = skb->len;
  			netif_receive_skb(skb);
  			break;
  		default:
  			dev_kfree_skb_any(skb);
  			QETH_CARD_TEXT(card, 3, "inbunkno");
  			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
  			continue;
  		}
  		work_done++;
  		budget--;
  		card->stats.rx_packets++;
  		card->stats.rx_bytes += len;
  	}
  	return work_done;
  }
  
  static int qeth_l3_poll(struct napi_struct *napi, int budget)
  {
  	struct qeth_card *card = container_of(napi, struct qeth_card, napi);
  	int work_done = 0;
  	struct qeth_qdio_buffer *buffer;
  	int done;
  	int new_budget = budget;
  
  	if (card->options.performance_stats) {
  		card->perf_stats.inbound_cnt++;
  		card->perf_stats.inbound_start_time = qeth_get_micros();
  	}
  
  	while (1) {
  		if (!card->rx.b_count) {
  			card->rx.qdio_err = 0;
  			card->rx.b_count = qdio_get_next_buffers(
  				card->data.ccwdev, 0, &card->rx.b_index,
  				&card->rx.qdio_err);
  			if (card->rx.b_count <= 0) {
  				card->rx.b_count = 0;
  				break;
  			}
  			card->rx.b_element =
  				&card->qdio.in_q->bufs[card->rx.b_index]
  				.buffer->element[0];
  			card->rx.e_offset = 0;
  		}
  
  		while (card->rx.b_count) {
  			buffer = &card->qdio.in_q->bufs[card->rx.b_index];
  			if (!(card->rx.qdio_err &&
  			    qeth_check_qdio_errors(card, buffer->buffer,
  			    card->rx.qdio_err, "qinerr")))
  				work_done += qeth_l3_process_inbound_buffer(
  					card, new_budget, &done);
  			else
  				done = 1;
  
  			if (done) {
  				if (card->options.performance_stats)
  					card->perf_stats.bufs_rec++;
  				qeth_put_buffer_pool_entry(card,
  					buffer->pool_entry);
  				qeth_queue_input_buffer(card, card->rx.b_index);
  				card->rx.b_count--;
  				if (card->rx.b_count) {
  					card->rx.b_index =
  						(card->rx.b_index + 1) %
  						QDIO_MAX_BUFFERS_PER_Q;
  					card->rx.b_element =
  						&card->qdio.in_q
  						->bufs[card->rx.b_index]
  						.buffer->element[0];
  					card->rx.e_offset = 0;
  				}
  			}
  
  			if (work_done >= budget)
  				goto out;
  			else
  				new_budget = budget - work_done;
  		}
  	}
  
  	napi_complete(napi);
  	if (qdio_start_irq(card->data.ccwdev, 0))
  		napi_schedule(&card->napi);
  out:
  	if (card->options.performance_stats)
  		card->perf_stats.inbound_time += qeth_get_micros() -
  			card->perf_stats.inbound_start_time;
  	return work_done;
  }
  
  static int qeth_l3_verify_vlan_dev(struct net_device *dev,
  			struct qeth_card *card)
  {
  	int rc = 0;
  	u16 vid;
  
  	for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
  		struct net_device *netdev;
  
  		rcu_read_lock();
  		netdev = __vlan_find_dev_deep(card->dev, htons(ETH_P_8021Q),
  					      vid);
  		rcu_read_unlock();
  		if (netdev == dev) {
  			rc = QETH_VLAN_CARD;
  			break;
  		}
  	}
  
  	if (rc && !(vlan_dev_real_dev(dev)->ml_priv == (void *)card))
  		return 0;
  
  	return rc;
  }
  
  static int qeth_l3_verify_dev(struct net_device *dev)
  {
  	struct qeth_card *card;
  	unsigned long flags;
  	int rc = 0;
  
  	read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  	list_for_each_entry(card, &qeth_core_card_list.list, list) {
  		if (card->dev == dev) {
  			rc = QETH_REAL_CARD;
  			break;
  		}
  		rc = qeth_l3_verify_vlan_dev(dev, card);
  		if (rc)
  			break;
  	}
  	read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  
  	return rc;
  }
  
  static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
  {
  	struct qeth_card *card = NULL;
  	int rc;
  
  	rc = qeth_l3_verify_dev(dev);
  	if (rc == QETH_REAL_CARD)
  		card = dev->ml_priv;
  	else if (rc == QETH_VLAN_CARD)
  		card = vlan_dev_real_dev(dev)->ml_priv;
  	if (card && card->options.layer2)
  		card = NULL;
  	if (card)
  		QETH_CARD_TEXT_(card, 4, "%d", rc);
  	return card ;
  }
  
  static int qeth_l3_stop_card(struct qeth_card *card, int recovery_mode)
  {
  	int rc = 0;
  
  	QETH_DBF_TEXT(SETUP, 2, "stopcard");
  	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
  
  	qeth_set_allowed_threads(card, 0, 1);
  	if (card->options.sniffer &&
  	    (card->info.promisc_mode == SET_PROMISC_MODE_ON))
  		qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
  	if (card->read.state == CH_STATE_UP &&
  	    card->write.state == CH_STATE_UP &&
  	    (card->state == CARD_STATE_UP)) {
  		if (recovery_mode)
  			qeth_l3_stop(card->dev);
  		else {
  			rtnl_lock();
  			dev_close(card->dev);
  			rtnl_unlock();
  		}
  		card->state = CARD_STATE_SOFTSETUP;
  	}
  	if (card->state == CARD_STATE_SOFTSETUP) {
  		qeth_l3_clear_ip_list(card, 1);
  		qeth_clear_ipacmd_list(card);
  		card->state = CARD_STATE_HARDSETUP;
  	}
  	if (card->state == CARD_STATE_HARDSETUP) {
  		qeth_qdio_clear_card(card, 0);
  		qeth_clear_qdio_buffers(card);
  		qeth_clear_working_pool_list(card);
  		card->state = CARD_STATE_DOWN;
  	}
  	if (card->state == CARD_STATE_DOWN) {
  		qeth_clear_cmd_buffers(&card->read);
  		qeth_clear_cmd_buffers(&card->write);
  	}
  	return rc;
  }
  
  /*
   * test for and Switch promiscuous mode (on or off)
   *  either for guestlan or HiperSocket Sniffer
   */
  static void
  qeth_l3_handle_promisc_mode(struct qeth_card *card)
  {
  	struct net_device *dev = card->dev;
  
  	if (((dev->flags & IFF_PROMISC) &&
  	     (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
  	    (!(dev->flags & IFF_PROMISC) &&
  	     (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
  		return;
  
  	if (card->info.guestlan) {		/* Guestlan trace */
  		if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
  			qeth_setadp_promisc_mode(card);
  	} else if (card->options.sniffer &&	/* HiperSockets trace */
  		   qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
  		if (dev->flags & IFF_PROMISC) {
  			QETH_CARD_TEXT(card, 3, "+promisc");
  			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
  		} else {
  			QETH_CARD_TEXT(card, 3, "-promisc");
  			qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
  		}
  	}
  }
  
  static void qeth_l3_set_multicast_list(struct net_device *dev)
  {
  	struct qeth_card *card = dev->ml_priv;
  
  	QETH_CARD_TEXT(card, 3, "setmulti");
  	if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
  	    (card->state != CARD_STATE_UP))
  		return;
  	if (!card->options.sniffer) {
  		qeth_l3_delete_mc_addresses(card);
  		qeth_l3_add_multicast_ipv4(card);
  #ifdef CONFIG_QETH_IPV6
  		qeth_l3_add_multicast_ipv6(card);
  #endif
  		qeth_l3_set_ip_addr_list(card);
  		if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
  			return;
  	}
  	qeth_l3_handle_promisc_mode(card);
  }
  
  static const char *qeth_l3_arp_get_error_cause(int *rc)
  {
  	switch (*rc) {
  	case QETH_IPA_ARP_RC_FAILED:
  		*rc = -EIO;
  		return "operation failed";
  	case QETH_IPA_ARP_RC_NOTSUPP:
  		*rc = -EOPNOTSUPP;
  		return "operation not supported";
  	case QETH_IPA_ARP_RC_OUT_OF_RANGE:
  		*rc = -EINVAL;
  		return "argument out of range";
  	case QETH_IPA_ARP_RC_Q_NOTSUPP:
  		*rc = -EOPNOTSUPP;
  		return "query operation not supported";
  	case QETH_IPA_ARP_RC_Q_NO_DATA:
  		*rc = -ENOENT;
  		return "no query data available";
  	default:
  		return "unknown error";
  	}
  }
  
  static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
  {
  	int tmp;
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "arpstnoe");
  
  	/*
  	 * currently GuestLAN only supports the ARP assist function
  	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
  	 * thus we say EOPNOTSUPP for this ARP function
  	 */
  	if (card->info.guestlan)
  		return -EOPNOTSUPP;
  	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
  		return -EOPNOTSUPP;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
  					  IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
  					  no_entries);
  	if (rc) {
  		tmp = rc;
  		QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on "
  			"%s: %s (0x%x/%d)\n", QETH_CARD_IFNAME(card),
  			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
  	}
  	return rc;
  }
  
  static __u32 get_arp_entry_size(struct qeth_card *card,
  			struct qeth_arp_query_data *qdata,
  			struct qeth_arp_entrytype *type, __u8 strip_entries)
  {
  	__u32 rc;
  	__u8 is_hsi;
  
  	is_hsi = qdata->reply_bits == 5;
  	if (type->ip == QETHARP_IP_ADDR_V4) {
  		QETH_CARD_TEXT(card, 4, "arpev4");
  		if (strip_entries) {
  			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
  				sizeof(struct qeth_arp_qi_entry7_short);
  		} else {
  			rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
  				sizeof(struct qeth_arp_qi_entry7);
  		}
  	} else if (type->ip == QETHARP_IP_ADDR_V6) {
  		QETH_CARD_TEXT(card, 4, "arpev6");
  		if (strip_entries) {
  			rc = is_hsi ?
  				sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
  				sizeof(struct qeth_arp_qi_entry7_short_ipv6);
  		} else {
  			rc = is_hsi ?
  				sizeof(struct qeth_arp_qi_entry5_ipv6) :
  				sizeof(struct qeth_arp_qi_entry7_ipv6);
  		}
  	} else {
  		QETH_CARD_TEXT(card, 4, "arpinv");
  		rc = 0;
  	}
  
  	return rc;
  }
  
  static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
  {
  	return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
  		(type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
  }
  
  static int qeth_l3_arp_query_cb(struct qeth_card *card,
  		struct qeth_reply *reply, unsigned long data)
  {
  	struct qeth_ipa_cmd *cmd;
  	struct qeth_arp_query_data *qdata;
  	struct qeth_arp_query_info *qinfo;
  	int i;
  	int e;
  	int entrybytes_done;
  	int stripped_bytes;
  	__u8 do_strip_entries;
  
  	QETH_CARD_TEXT(card, 3, "arpquecb");
  
  	qinfo = (struct qeth_arp_query_info *) reply->param;
  	cmd = (struct qeth_ipa_cmd *) data;
  	QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
  	if (cmd->hdr.return_code) {
  		QETH_CARD_TEXT(card, 4, "arpcberr");
  		QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
  		return 0;
  	}
  	if (cmd->data.setassparms.hdr.return_code) {
  		cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
  		QETH_CARD_TEXT(card, 4, "setaperr");
  		QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
  		return 0;
  	}
  	qdata = &cmd->data.setassparms.data.query_arp;
  	QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
  
  	do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
  	stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
  	entrybytes_done = 0;
  	for (e = 0; e < qdata->no_entries; ++e) {
  		char *cur_entry;
  		__u32 esize;
  		struct qeth_arp_entrytype *etype;
  
  		cur_entry = &qdata->data + entrybytes_done;
  		etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
  		if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
  			QETH_CARD_TEXT(card, 4, "pmis");
  			QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
  			break;
  		}
  		esize = get_arp_entry_size(card, qdata, etype,
  			do_strip_entries);
  		QETH_CARD_TEXT_(card, 5, "esz%i", esize);
  		if (!esize)
  			break;
  
  		if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
  			QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOMEM);
  			cmd->hdr.return_code = IPA_RC_ENOMEM;
  			goto out_error;
  		}
  
  		memcpy(qinfo->udata + qinfo->udata_offset,
  			&qdata->data + entrybytes_done + stripped_bytes,
  			esize);
  		entrybytes_done += esize + stripped_bytes;
  		qinfo->udata_offset += esize;
  		++qinfo->no_entries;
  	}
  	/* check if all replies received ... */
  	if (cmd->data.setassparms.hdr.seq_no <
  	    cmd->data.setassparms.hdr.number_of_replies)
  		return 1;
  	QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
  	memcpy(qinfo->udata, &qinfo->no_entries, 4);
  	/* keep STRIP_ENTRIES flag so the user program can distinguish
  	 * stripped entries from normal ones */
  	if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
  		qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
  	memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
  	QETH_CARD_TEXT_(card, 4, "rc%i", 0);
  	return 0;
  out_error:
  	i = 0;
  	memcpy(qinfo->udata, &i, 4);
  	return 0;
  }
  
  static int qeth_l3_send_ipa_arp_cmd(struct qeth_card *card,
  		struct qeth_cmd_buffer *iob, int len,
  		int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
  			unsigned long),
  		void *reply_param)
  {
  	QETH_CARD_TEXT(card, 4, "sendarp");
  
  	memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
  	memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
  	       &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
  	return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
  				      reply_cb, reply_param);
  }
  
  static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
  	enum qeth_prot_versions prot,
  	struct qeth_arp_query_info *qinfo)
  {
  	struct qeth_cmd_buffer *iob;
  	struct qeth_ipa_cmd *cmd;
  	int tmp;
  	int rc;
  
  	QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
  
  	iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
  			IPA_CMD_ASS_ARP_QUERY_INFO,
  			sizeof(struct qeth_arp_query_data) - sizeof(char),
  			prot);
  	cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
  	cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
  	cmd->data.setassparms.data.query_arp.reply_bits = 0;
  	cmd->data.setassparms.data.query_arp.no_entries = 0;
  	rc = qeth_l3_send_ipa_arp_cmd(card, iob,
  			   QETH_SETASS_BASE_LEN+QETH_ARP_CMD_LEN,
  			   qeth_l3_arp_query_cb, (void *)qinfo);
  	if (rc) {
  		tmp = rc;
  		QETH_DBF_MESSAGE(2,
  			"Error while querying ARP cache on %s: %s "
  			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
  			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
  	}
  
  	return rc;
  }
  
  static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
  {
  	struct qeth_arp_query_info qinfo = {0, };
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "arpquery");
  
  	if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
  			       IPA_ARP_PROCESSING)) {
  		QETH_CARD_TEXT(card, 3, "arpqnsup");
  		rc = -EOPNOTSUPP;
  		goto out;
  	}
  	/* get size of userspace buffer and mask_bits -> 6 bytes */
  	if (copy_from_user(&qinfo, udata, 6)) {
  		rc = -EFAULT;
  		goto out;
  	}
  	qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
  	if (!qinfo.udata) {
  		rc = -ENOMEM;
  		goto out;
  	}
  	qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
  	rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
  	if (rc) {
  		if (copy_to_user(udata, qinfo.udata, 4))
  			rc = -EFAULT;
  			goto free_and_out;
  	} else {
  #ifdef CONFIG_QETH_IPV6
  		if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
  			/* fails in case of GuestLAN QDIO mode */
  			qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6,
  				&qinfo);
  		}
  #endif
  		if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
  			QETH_CARD_TEXT(card, 4, "qactf");
  			rc = -EFAULT;
  			goto free_and_out;
  		}
  		QETH_CARD_TEXT_(card, 4, "qacts");
  	}
  free_and_out:
  	kfree(qinfo.udata);
  out:
  	return rc;
  }
  
  static int qeth_l3_arp_add_entry(struct qeth_card *card,
  				struct qeth_arp_cache_entry *entry)
  {
  	struct qeth_cmd_buffer *iob;
  	char buf[16];
  	int tmp;
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "arpadent");
  
  	/*
  	 * currently GuestLAN only supports the ARP assist function
  	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
  	 * thus we say EOPNOTSUPP for this ARP function
  	 */
  	if (card->info.guestlan)
  		return -EOPNOTSUPP;
  	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
  		return -EOPNOTSUPP;
  	}
  
  	iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
  				       IPA_CMD_ASS_ARP_ADD_ENTRY,
  				       sizeof(struct qeth_arp_cache_entry),
  				       QETH_PROT_IPV4);
  	rc = qeth_l3_send_setassparms(card, iob,
  				   sizeof(struct qeth_arp_cache_entry),
  				   (unsigned long) entry,
  				   qeth_l3_default_setassparms_cb, NULL);
  	if (rc) {
  		tmp = rc;
  		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
  		QETH_DBF_MESSAGE(2, "Could not add ARP entry for address %s "
  			"on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
  			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
  	}
  	return rc;
  }
  
  static int qeth_l3_arp_remove_entry(struct qeth_card *card,
  				struct qeth_arp_cache_entry *entry)
  {
  	struct qeth_cmd_buffer *iob;
  	char buf[16] = {0, };
  	int tmp;
  	int rc;
  
  	QETH_CARD_TEXT(card, 3, "arprment");
  
  	/*
  	 * currently GuestLAN only supports the ARP assist function
  	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_REMOVE_ENTRY;
  	 * thus we say EOPNOTSUPP for this ARP function
  	 */
  	if (card->info.guestlan)
  		return -EOPNOTSUPP;
  	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
  		return -EOPNOTSUPP;
  	}
  	memcpy(buf, entry, 12);
  	iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
  				       IPA_CMD_ASS_ARP_REMOVE_ENTRY,
  				       12,
  				       QETH_PROT_IPV4);
  	rc = qeth_l3_send_setassparms(card, iob,
  				   12, (unsigned long)buf,
  				   qeth_l3_default_setassparms_cb, NULL);
  	if (rc) {
  		tmp = rc;
  		memset(buf, 0, 16);
  		qeth_l3_ipaddr4_to_string((u8 *)entry->ipaddr, buf);
  		QETH_DBF_MESSAGE(2, "Could not delete ARP entry for address %s"
  			" on %s: %s (0x%x/%d)\n", buf, QETH_CARD_IFNAME(card),
  			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
  	}
  	return rc;
  }
  
  static int qeth_l3_arp_flush_cache(struct qeth_card *card)
  {
  	int rc;
  	int tmp;
  
  	QETH_CARD_TEXT(card, 3, "arpflush");
  
  	/*
  	 * currently GuestLAN only supports the ARP assist function
  	 * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
  	 * thus we say EOPNOTSUPP for this ARP function
  	*/
  	if (card->info.guestlan || (card->info.type == QETH_CARD_TYPE_IQD))
  		return -EOPNOTSUPP;
  	if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
  		return -EOPNOTSUPP;
  	}
  	rc = qeth_l3_send_simple_setassparms(card, IPA_ARP_PROCESSING,
  					  IPA_CMD_ASS_ARP_FLUSH_CACHE, 0);
  	if (rc) {
  		tmp = rc;
  		QETH_DBF_MESSAGE(2, "Could not flush ARP cache on %s: %s "
  			"(0x%x/%d)\n", QETH_CARD_IFNAME(card),
  			qeth_l3_arp_get_error_cause(&rc), tmp, tmp);
  	}
  	return rc;
  }
  
  static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  {
  	struct qeth_card *card = dev->ml_priv;
  	struct qeth_arp_cache_entry arp_entry;
  	struct mii_ioctl_data *mii_data;
  	int rc = 0;
  
  	if (!card)
  		return -ENODEV;
  
  	if ((card->state != CARD_STATE_UP) &&
  		(card->state != CARD_STATE_SOFTSETUP))
  		return -ENODEV;
  
  	switch (cmd) {
  	case SIOC_QETH_ARP_SET_NO_ENTRIES:
  		if (!capable(CAP_NET_ADMIN)) {
  			rc = -EPERM;
  			break;
  		}
  		rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
  		break;
  	case SIOC_QETH_ARP_QUERY_INFO:
  		if (!capable(CAP_NET_ADMIN)) {
  			rc = -EPERM;
  			break;
  		}
  		rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
  		break;
  	case SIOC_QETH_ARP_ADD_ENTRY:
  		if (!capable(CAP_NET_ADMIN)) {
  			rc = -EPERM;
  			break;
  		}
  		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
  				   sizeof(struct qeth_arp_cache_entry)))
  			rc = -EFAULT;
  		else
  			rc = qeth_l3_arp_add_entry(card, &arp_entry);
  		break;
  	case SIOC_QETH_ARP_REMOVE_ENTRY:
  		if (!capable(CAP_NET_ADMIN)) {
  			rc = -EPERM;
  			break;
  		}
  		if (copy_from_user(&arp_entry, rq->ifr_ifru.ifru_data,
  				   sizeof(struct qeth_arp_cache_entry)))
  			rc = -EFAULT;
  		else
  			rc = qeth_l3_arp_remove_entry(card, &arp_entry);
  		break;
  	case SIOC_QETH_ARP_FLUSH_CACHE:
  		if (!capable(CAP_NET_ADMIN)) {
  			rc = -EPERM;
  			break;
  		}
  		rc = qeth_l3_arp_flush_cache(card);
  		break;
  	case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  		rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  		break;
  	case SIOC_QETH_GET_CARD_TYPE:
  		if ((card->info.type == QETH_CARD_TYPE_OSD ||
  		     card->info.type == QETH_CARD_TYPE_OSX) &&
  		    !card->info.guestlan)
  			return 1;
  		return 0;
  		break;
  	case SIOCGMIIPHY:
  		mii_data = if_mii(rq);
  		mii_data->phy_id = 0;
  		break;
  	case SIOCGMIIREG:
  		mii_data = if_mii(rq);
  		if (mii_data->phy_id != 0)
  			rc = -EINVAL;
  		else
  			mii_data->val_out = qeth_mdio_read(dev,
  							mii_data->phy_id,
  							mii_data->reg_num);
  		break;
  	case SIOC_QETH_QUERY_OAT:
  		rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
  		break;
  	default:
  		rc = -EOPNOTSUPP;
  	}
  	if (rc)
  		QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  	return rc;
  }
  
  int inline qeth_l3_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
  {
  	int cast_type = RTN_UNSPEC;
  	struct neighbour *n = NULL;
  	struct dst_entry *dst;
  
  	rcu_read_lock();
  	dst = skb_dst(skb);
  	if (dst)
  		n = dst_neigh_lookup_skb(dst, skb);
  	if (n) {
  		cast_type = n->type;
  		rcu_read_unlock();
  		neigh_release(n);
  		if ((cast_type == RTN_BROADCAST) ||
  		    (cast_type == RTN_MULTICAST) ||
  		    (cast_type == RTN_ANYCAST))
  			return cast_type;
  		else
  			return RTN_UNSPEC;
  	}
  	rcu_read_unlock();
  
  	/* try something else */
  	if (skb->protocol == ETH_P_IPV6)
  		return (skb_network_header(skb)[24] == 0xff) ?
  				RTN_MULTICAST : 0;
  	else if (skb->protocol == ETH_P_IP)
  		return ((skb_network_header(skb)[16] & 0xf0) == 0xe0) ?
  				RTN_MULTICAST : 0;
  	/* ... */
  	if (!memcmp(skb->data, skb->dev->broadcast, 6))
  		return RTN_BROADCAST;
  	else {
  		u16 hdr_mac;
  
  		hdr_mac = *((u16 *)skb->data);
  		/* tr multicast? */
  		switch (card->info.link_type) {
  		case QETH_LINK_TYPE_HSTR:
  		case QETH_LINK_TYPE_LANE_TR:
  			if ((hdr_mac == QETH_TR_MAC_NC) ||
  			    (hdr_mac == QETH_TR_MAC_C))
  				return RTN_MULTICAST;
  			break;
  		/* eth or so multicast? */
  		default:
  		if ((hdr_mac == QETH_ETH_MAC_V4) ||
  			    (hdr_mac == QETH_ETH_MAC_V6))
  				return RTN_MULTICAST;
  		}
  	}
  	return cast_type;
  }
  
  static void qeth_l3_fill_af_iucv_hdr(struct qeth_card *card,
  		struct qeth_hdr *hdr, struct sk_buff *skb)
  {
  	char daddr[16];
  	struct af_iucv_trans_hdr *iucv_hdr;
  
  	skb_pull(skb, 14);
  	card->dev->header_ops->create(skb, card->dev, 0,
  				      card->dev->dev_addr, card->dev->dev_addr,
  				      card->dev->addr_len);
  	skb_pull(skb, 14);
  	iucv_hdr = (struct af_iucv_trans_hdr *)skb->data;
  	memset(hdr, 0, sizeof(struct qeth_hdr));
  	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
  	hdr->hdr.l3.ext_flags = 0;
  	hdr->hdr.l3.length = skb->len;
  	hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
  	memset(daddr, 0, sizeof(daddr));
  	daddr[0] = 0xfe;
  	daddr[1] = 0x80;
  	memcpy(&daddr[8], iucv_hdr->destUserID, 8);
  	memcpy(hdr->hdr.l3.dest_addr, daddr, 16);
  }
  
  static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
  		struct sk_buff *skb, int ipv, int cast_type)
  {
  	struct dst_entry *dst;
  
  	memset(hdr, 0, sizeof(struct qeth_hdr));
  	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
  	hdr->hdr.l3.ext_flags = 0;
  
  	/*
  	 * before we're going to overwrite this location with next hop ip.
  	 * v6 uses passthrough, v4 sets the tag in the QDIO header.
  	 */
  	if (vlan_tx_tag_present(skb)) {
  		if ((ipv == 4) || (card->info.type == QETH_CARD_TYPE_IQD))
  			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_VLAN_FRAME;
  		else
  			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_INCLUDE_VLAN_TAG;
  		hdr->hdr.l3.vlan_id = vlan_tx_tag_get(skb);
  	}
  
  	hdr->hdr.l3.length = skb->len - sizeof(struct qeth_hdr);
  
  	rcu_read_lock();
  	dst = skb_dst(skb);
  	if (ipv == 4) {
  		struct rtable *rt = (struct rtable *) dst;
  		__be32 *pkey = &ip_hdr(skb)->daddr;
  
  		if (rt->rt_gateway)
  			pkey = &rt->rt_gateway;
  
  		/* IPv4 */
  		hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags4(cast_type);
  		memset(hdr->hdr.l3.dest_addr, 0, 12);
  		*((__be32 *) (&hdr->hdr.l3.dest_addr[12])) = *pkey;
  	} else if (ipv == 6) {
  		struct rt6_info *rt = (struct rt6_info *) dst;
  		struct in6_addr *pkey = &ipv6_hdr(skb)->daddr;
  
  		if (!ipv6_addr_any(&rt->rt6i_gateway))
  			pkey = &rt->rt6i_gateway;
  
  		/* IPv6 */
  		hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags6(cast_type);
  		if (card->info.type == QETH_CARD_TYPE_IQD)
  			hdr->hdr.l3.flags &= ~QETH_HDR_PASSTHRU;
  		memcpy(hdr->hdr.l3.dest_addr, pkey, 16);
  	} else {
  		if (!memcmp(skb->data + sizeof(struct qeth_hdr),
  			    skb->dev->broadcast, 6)) {
  			/* broadcast? */
  			hdr->hdr.l3.flags = QETH_CAST_BROADCAST |
  						QETH_HDR_PASSTHRU;
  		} else {
  			hdr->hdr.l3.flags = (cast_type == RTN_MULTICAST) ?
  				QETH_CAST_MULTICAST | QETH_HDR_PASSTHRU :
  				QETH_CAST_UNICAST | QETH_HDR_PASSTHRU;
  		}
  	}
  	rcu_read_unlock();
  }
  
  static inline void qeth_l3_hdr_csum(struct qeth_card *card,
  		struct qeth_hdr *hdr, struct sk_buff *skb)
  {
  	struct iphdr *iph = ip_hdr(skb);
  
  	/* tcph->check contains already the pseudo hdr checksum
  	 * so just set the header flags
  	 */
  	if (iph->protocol == IPPROTO_UDP)
  		hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_UDP;
  	hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
  		QETH_HDR_EXT_CSUM_HDR_REQ;
  	iph->check = 0;
  	if (card->options.performance_stats)
  		card->perf_stats.tx_csum++;
  }
  
  static void qeth_tso_fill_header(struct qeth_card *card,
  		struct qeth_hdr *qhdr, struct sk_buff *skb)
  {
  	struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr;
  	struct tcphdr *tcph = tcp_hdr(skb);
  	struct iphdr *iph = ip_hdr(skb);
  	struct ipv6hdr *ip6h = ipv6_hdr(skb);
  
  	/*fix header to TSO values ...*/
  	hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
  	hdr->hdr.hdr.l3.length = skb->len - sizeof(struct qeth_hdr_tso);
  	/*set values which are fix for the first approach ...*/
  	hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
  	hdr->ext.imb_hdr_no  = 1;
  	hdr->ext.hdr_type    = 1;
  	hdr->ext.hdr_version = 1;
  	hdr->ext.hdr_len     = 28;
  	/*insert non-fix values */
  	hdr->ext.mss = skb_shinfo(skb)->gso_size;
  	hdr->ext.dg_hdr_len = (__u16)(iph->ihl*4 + tcph->doff*4);
  	hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
  				       sizeof(struct qeth_hdr_tso));
  	tcph->check = 0;
  	if (skb->protocol == ETH_P_IPV6) {
  		ip6h->payload_len = 0;
  		tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
  					       0, IPPROTO_TCP, 0);
  	} else {
  		/*OSA want us to set these values ...*/
  		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
  					 0, IPPROTO_TCP, 0);
  		iph->tot_len = 0;
  		iph->check = 0;
  	}
  }
  
  static inline int qeth_l3_tso_elements(struct sk_buff *skb)
  {
  	unsigned long tcpd = (unsigned long)tcp_hdr(skb) +
  		tcp_hdr(skb)->doff * 4;
  	int tcpd_len = skb->len - (tcpd - (unsigned long)skb->data);
  	int elements = PFN_UP(tcpd + tcpd_len - 1) - PFN_DOWN(tcpd);
  
  	elements += qeth_get_elements_for_frags(skb);
  
  	return elements;
  }
  
  static int qeth_l3_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
  {
  	int rc;
  	u16 *tag;
  	struct qeth_hdr *hdr = NULL;
  	int elements_needed = 0;
  	int elems;
  	struct qeth_card *card = dev->ml_priv;
  	struct sk_buff *new_skb = NULL;
  	int ipv = qeth_get_ip_version(skb);
  	int cast_type = qeth_l3_get_cast_type(card, skb);
  	struct qeth_qdio_out_q *queue = card->qdio.out_qs
  		[qeth_get_priority_queue(card, skb, ipv, cast_type)];
  	int tx_bytes = skb->len;
  	bool large_send;
  	int data_offset = -1;
  	int nr_frags;
  
  	if (((card->info.type == QETH_CARD_TYPE_IQD) &&
  	     (((card->options.cq != QETH_CQ_ENABLED) && !ipv) ||
  	      ((card->options.cq == QETH_CQ_ENABLED) &&
  	       (skb->protocol != ETH_P_AF_IUCV)))) ||
  	    card->options.sniffer)
  			goto tx_drop;
  
  	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
  		card->stats.tx_carrier_errors++;
  		goto tx_drop;
  	}
  
  	if ((cast_type == RTN_BROADCAST) &&
  	    (card->info.broadcast_capable == 0))
  		goto tx_drop;
  
  	if (card->options.performance_stats) {
  		card->perf_stats.outbound_cnt++;
  		card->perf_stats.outbound_start_time = qeth_get_micros();
  	}
  
  	large_send = skb_is_gso(skb);
  
  	if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
  	    (skb_shinfo(skb)->nr_frags == 0)) {
  		new_skb = skb;
  		if (new_skb->protocol == ETH_P_AF_IUCV)
  			data_offset = 0;
  		else
  			data_offset = ETH_HLEN;
  		hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
  		if (!hdr)
  			goto tx_drop;
  		elements_needed++;
  	} else {
  		/* create a clone with writeable headroom */
  		new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr_tso)
  					+ VLAN_HLEN);
  		if (!new_skb)
  			goto tx_drop;
  	}
  
  	if (card->info.type == QETH_CARD_TYPE_IQD) {
  		if (data_offset < 0)
  			skb_pull(new_skb, ETH_HLEN);
  	} else {
  		if (ipv == 4) {
  			skb_pull(new_skb, ETH_HLEN);
  		}
  
  		if (ipv != 4 && vlan_tx_tag_present(new_skb)) {
  			skb_push(new_skb, VLAN_HLEN);
  			skb_copy_to_linear_data(new_skb, new_skb->data + 4, 4);
  			skb_copy_to_linear_data_offset(new_skb, 4,
  				new_skb->data + 8, 4);
  			skb_copy_to_linear_data_offset(new_skb, 8,
  				new_skb->data + 12, 4);
  			tag = (u16 *)(new_skb->data + 12);
  			*tag = __constant_htons(ETH_P_8021Q);
  			*(tag + 1) = htons(vlan_tx_tag_get(new_skb));
  		}
  	}
  
  	netif_stop_queue(dev);
  
  	/* fix hardware limitation: as long as we do not have sbal
  	 * chaining we can not send long frag lists
  	 */
  	if (large_send) {
  		if (qeth_l3_tso_elements(new_skb) + 1 > 16) {
  			if (skb_linearize(new_skb))
  				goto tx_drop;
  			if (card->options.performance_stats)
  				card->perf_stats.tx_lin++;
  		}
  	}
  
  	if (large_send && (cast_type == RTN_UNSPEC)) {
  		hdr = (struct qeth_hdr *)skb_push(new_skb,
  						sizeof(struct qeth_hdr_tso));
  		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
  		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type);
  		qeth_tso_fill_header(card, hdr, new_skb);
  		elements_needed++;
  	} else {
  		if (data_offset < 0) {
  			hdr = (struct qeth_hdr *)skb_push(new_skb,
  						sizeof(struct qeth_hdr));
  			qeth_l3_fill_header(card, hdr, new_skb, ipv,
  						cast_type);
  		} else {
  			if (new_skb->protocol == ETH_P_AF_IUCV)
  				qeth_l3_fill_af_iucv_hdr(card, hdr, new_skb);
  			else {
  				qeth_l3_fill_header(card, hdr, new_skb, ipv,
  							cast_type);
  				hdr->hdr.l3.length = new_skb->len - data_offset;
  			}
  		}
  
  		if (skb->ip_summed == CHECKSUM_PARTIAL)
  			qeth_l3_hdr_csum(card, hdr, new_skb);
  	}
  
  	elems = qeth_get_elements_no(card, new_skb, elements_needed);
  	if (!elems) {
  		if (data_offset >= 0)
  			kmem_cache_free(qeth_core_header_cache, hdr);
  		goto tx_drop;
  	}
  	elements_needed += elems;
  	nr_frags = skb_shinfo(new_skb)->nr_frags;
  
  	if (card->info.type != QETH_CARD_TYPE_IQD) {
  		int len;
  		if (large_send)
  			len = ((unsigned long)tcp_hdr(new_skb) +
  				tcp_hdr(new_skb)->doff * 4) -
  				(unsigned long)new_skb->data;
  		else
  			len = sizeof(struct qeth_hdr_layer3);
  
  		if (qeth_hdr_chk_and_bounce(new_skb, &hdr, len))
  			goto tx_drop;
  		rc = qeth_do_send_packet(card, queue, new_skb, hdr,
  					 elements_needed);
  	} else
  		rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
  					elements_needed, data_offset, 0);
  
  	if (!rc) {
  		card->stats.tx_packets++;
  		card->stats.tx_bytes += tx_bytes;
  		if (new_skb != skb)
  			dev_kfree_skb_any(skb);
  		if (card->options.performance_stats) {
  			if (large_send) {
  				card->perf_stats.large_send_bytes += tx_bytes;
  				card->perf_stats.large_send_cnt++;
  			}
  			if (nr_frags) {
  				card->perf_stats.sg_skbs_sent++;
  				/* nr_frags + skb->data */
  				card->perf_stats.sg_frags_sent += nr_frags + 1;
  			}
  		}
  		rc = NETDEV_TX_OK;
  	} else {
  		if (data_offset >= 0)
  			kmem_cache_free(qeth_core_header_cache, hdr);
  
  		if (rc == -EBUSY) {
  			if (new_skb != skb)
  				dev_kfree_skb_any(new_skb);
  			return NETDEV_TX_BUSY;
  		} else
  			goto tx_drop;
  	}
  
  	netif_wake_queue(dev);
  	if (card->options.performance_stats)
  		card->perf_stats.outbound_time += qeth_get_micros() -
  			card->perf_stats.outbound_start_time;
  	return rc;
  
  tx_drop:
  	card->stats.tx_dropped++;
  	card->stats.tx_errors++;
  	if ((new_skb != skb) && new_skb)
  		dev_kfree_skb_any(new_skb);
  	dev_kfree_skb_any(skb);
  	netif_wake_queue(dev);
  	return NETDEV_TX_OK;
  }
  
  static int __qeth_l3_open(struct net_device *dev)
  {
  	struct qeth_card *card = dev->ml_priv;
  	int rc = 0;
  
  	QETH_CARD_TEXT(card, 4, "qethopen");
  	if (card->state == CARD_STATE_UP)
  		return rc;
  	if (card->state != CARD_STATE_SOFTSETUP)
  		return -ENODEV;
  	card->data.state = CH_STATE_UP;
  	card->state = CARD_STATE_UP;
  	netif_start_queue(dev);
  
  	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
  		napi_enable(&card->napi);
  		napi_schedule(&card->napi);
  	} else
  		rc = -EIO;
  	return rc;
  }
  
  static int qeth_l3_open(struct net_device *dev)
  {
  	struct qeth_card *card = dev->ml_priv;
  
  	QETH_CARD_TEXT(card, 5, "qethope_");
  	if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
  		QETH_CARD_TEXT(card, 3, "openREC");
  		return -ERESTARTSYS;
  	}
  	return __qeth_l3_open(dev);
  }
  
  static int qeth_l3_stop(struct net_device *dev)
  {
  	struct qeth_card *card = dev->ml_priv;
  
  	QETH_CARD_TEXT(card, 4, "qethstop");
  	netif_tx_disable(dev);
  	if (card->state == CARD_STATE_UP) {
  		card->state = CARD_STATE_SOFTSETUP;
  		napi_disable(&card->napi);
  	}
  	return 0;
  }
  
  static netdev_features_t qeth_l3_fix_features(struct net_device *dev,
  	netdev_features_t features)
  {
  	struct qeth_card *card = dev->ml_priv;
  
  	if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
  		features &= ~NETIF_F_IP_CSUM;
  	if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
  		features &= ~NETIF_F_TSO;
  	if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
  		features &= ~NETIF_F_RXCSUM;
  
  	return features;
  }
  
  static int qeth_l3_set_features(struct net_device *dev,
  	netdev_features_t features)
  {
  	struct qeth_card *card = dev->ml_priv;
  	u32 changed = dev->features ^ features;
  	int err;
  
  	if (!(changed & NETIF_F_RXCSUM))
  		return 0;
  
  	if (card->state == CARD_STATE_DOWN ||
  	    card->state == CARD_STATE_RECOVER)
  		return 0;
  
  	err = qeth_l3_set_rx_csum(card, features & NETIF_F_RXCSUM);
  	if (err)
  		dev->features = features ^ NETIF_F_RXCSUM;
  
  	return err;
  }
  
  static const struct ethtool_ops qeth_l3_ethtool_ops = {
  	.get_link = ethtool_op_get_link,
  	.get_strings = qeth_core_get_strings,
  	.get_ethtool_stats = qeth_core_get_ethtool_stats,
  	.get_sset_count = qeth_core_get_sset_count,
  	.get_drvinfo = qeth_core_get_drvinfo,
  	.get_settings = qeth_core_ethtool_get_settings,
  };
  
  /*
   * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
   * NOARP on the netdevice is no option because it also turns off neighbor
   * solicitation. For IPv4 we install a neighbor_setup function. We don't want
   * arp resolution but we want the hard header (packet socket will work
   * e.g. tcpdump)
   */
  static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
  {
  	n->nud_state = NUD_NOARP;
  	memcpy(n->ha, "FAKELL", 6);
  	n->output = n->ops->connected_output;
  	return 0;
  }
  
  static int
  qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
  {
  	if (np->tbl->family == AF_INET)
  		np->neigh_setup = qeth_l3_neigh_setup_noarp;
  
  	return 0;
  }
  
  static const struct net_device_ops qeth_l3_netdev_ops = {
  	.ndo_open		= qeth_l3_open,
  	.ndo_stop		= qeth_l3_stop,
  	.ndo_get_stats		= qeth_get_stats,
  	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_rx_mode	= qeth_l3_set_multicast_list,
  	.ndo_do_ioctl		= qeth_l3_do_ioctl,
  	.ndo_change_mtu		= qeth_change_mtu,
  	.ndo_fix_features	= qeth_l3_fix_features,
  	.ndo_set_features	= qeth_l3_set_features,
  	.ndo_vlan_rx_add_vid	= qeth_l3_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
  	.ndo_tx_timeout		= qeth_tx_timeout,
  };
  
  static const struct net_device_ops qeth_l3_osa_netdev_ops = {
  	.ndo_open		= qeth_l3_open,
  	.ndo_stop		= qeth_l3_stop,
  	.ndo_get_stats		= qeth_get_stats,
  	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_rx_mode	= qeth_l3_set_multicast_list,
  	.ndo_do_ioctl		= qeth_l3_do_ioctl,
  	.ndo_change_mtu		= qeth_change_mtu,
  	.ndo_fix_features	= qeth_l3_fix_features,
  	.ndo_set_features	= qeth_l3_set_features,
  	.ndo_vlan_rx_add_vid	= qeth_l3_vlan_rx_add_vid,
  	.ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
  	.ndo_tx_timeout		= qeth_tx_timeout,
  	.ndo_neigh_setup	= qeth_l3_neigh_setup,
  };
  
  static int qeth_l3_setup_netdev(struct qeth_card *card)
  {
  	if (card->info.type == QETH_CARD_TYPE_OSD ||
  	    card->info.type == QETH_CARD_TYPE_OSX) {
  		if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
  		    (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
  			pr_info("qeth_l3: ignoring TR device\n");
  			return -ENODEV;
  		} else {
  			card->dev = alloc_etherdev(0);
  			if (!card->dev)
  				return -ENODEV;
  			card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
  
  			/*IPv6 address autoconfiguration stuff*/
  			qeth_l3_get_unique_id(card);
  			if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
  				card->dev->dev_id = card->info.unique_id &
  							 0xffff;
  			if (!card->info.guestlan) {
  				card->dev->hw_features = NETIF_F_SG |
  					NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
  					NETIF_F_TSO;
  				card->dev->features = NETIF_F_RXCSUM;
  			}
  		}
  	} else if (card->info.type == QETH_CARD_TYPE_IQD) {
  		card->dev = alloc_netdev(0, "hsi%d", ether_setup);
  		if (!card->dev)
  			return -ENODEV;
  		card->dev->flags |= IFF_NOARP;
  		card->dev->netdev_ops = &qeth_l3_netdev_ops;
  		qeth_l3_iqd_read_initial_mac(card);
  		if (card->options.hsuid[0])
  			memcpy(card->dev->perm_addr, card->options.hsuid, 9);
  	} else
  		return -ENODEV;
  
  	card->dev->ml_priv = card;
  	card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
  	card->dev->mtu = card->info.initial_mtu;
  	SET_ETHTOOL_OPS(card->dev, &qeth_l3_ethtool_ops);
  	card->dev->features |=	NETIF_F_HW_VLAN_CTAG_TX |
  				NETIF_F_HW_VLAN_CTAG_RX |
  				NETIF_F_HW_VLAN_CTAG_FILTER;
  	card->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
  	card->dev->gso_max_size = 15 * PAGE_SIZE;
  
  	SET_NETDEV_DEV(card->dev, &card->gdev->dev);
  	netif_napi_add(card->dev, &card->napi, qeth_l3_poll, QETH_NAPI_WEIGHT);
  	return register_netdev(card->dev);
  }
  
  static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
  {
  	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
  
  	qeth_l3_create_device_attributes(&gdev->dev);
  	card->options.layer2 = 0;
  	card->info.hwtrap = 0;
  	return 0;
  }
  
  static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
  {
  	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
  
  	qeth_l3_remove_device_attributes(&cgdev->dev);
  
  	qeth_set_allowed_threads(card, 0, 1);
  	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
  
  	if (cgdev->state == CCWGROUP_ONLINE)
  		qeth_l3_set_offline(cgdev);
  
  	if (card->dev) {
  		unregister_netdev(card->dev);
  		card->dev = NULL;
  	}
  
  	qeth_l3_clear_ip_list(card, 0);
  	qeth_l3_clear_ipato_list(card);
  	return;
  }
  
  static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
  {
  	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
  	int rc = 0;
  	enum qeth_card_states recover_flag;
  
  	mutex_lock(&card->discipline_mutex);
  	mutex_lock(&card->conf_mutex);
  	QETH_DBF_TEXT(SETUP, 2, "setonlin");
  	QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
  
  	recover_flag = card->state;
  	rc = qeth_core_hardsetup_card(card);
  	if (rc) {
  		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
  		rc = -ENODEV;
  		goto out_remove;
  	}
  
  	if (!card->dev && qeth_l3_setup_netdev(card)) {
  		rc = -ENODEV;
  		goto out_remove;
  	}
  
  	if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
  		if (card->info.hwtrap &&
  		    qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
  			card->info.hwtrap = 0;
  	} else
  		card->info.hwtrap = 0;
  
  	card->state = CARD_STATE_HARDSETUP;
  	memset(&card->rx, 0, sizeof(struct qeth_rx));
  	qeth_print_status_message(card);
  
  	/* softsetup */
  	QETH_DBF_TEXT(SETUP, 2, "softsetp");
  
  	rc = qeth_send_startlan(card);
  	if (rc) {
  		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
  		if (rc == 0xe080) {
  			dev_warn(&card->gdev->dev,
  				"The LAN is offline\n");
  			card->lan_online = 0;
  			goto contin;
  		}
  		rc = -ENODEV;
  		goto out_remove;
  	} else
  		card->lan_online = 1;
  
  contin:
  	rc = qeth_l3_setadapter_parms(card);
  	if (rc)
  		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
  	if (!card->options.sniffer) {
  		rc = qeth_l3_start_ipassists(card);
  		if (rc) {
  			QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
  			goto out_remove;
  		}
  		rc = qeth_l3_setrouting_v4(card);
  		if (rc)
  			QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
  		rc = qeth_l3_setrouting_v6(card);
  		if (rc)
  			QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
  	}
  	netif_tx_disable(card->dev);
  
  	rc = qeth_init_qdio_queues(card);
  	if (rc) {
  		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
  		rc = -ENODEV;
  		goto out_remove;
  	}
  	card->state = CARD_STATE_SOFTSETUP;
  
  	qeth_set_allowed_threads(card, 0xffffffff, 0);
  	qeth_l3_set_ip_addr_list(card);
  	if (card->lan_online)
  		netif_carrier_on(card->dev);
  	else
  		netif_carrier_off(card->dev);
  	if (recover_flag == CARD_STATE_RECOVER) {
  		rtnl_lock();
  		if (recovery_mode)
  			__qeth_l3_open(card->dev);
  		else
  			dev_open(card->dev);
  		qeth_l3_set_multicast_list(card->dev);
  		rtnl_unlock();
  	}
  	qeth_trace_features(card);
  	/* let user_space know that device is online */
  	kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
  	mutex_unlock(&card->conf_mutex);
  	mutex_unlock(&card->discipline_mutex);
  	return 0;
  out_remove:
  	qeth_l3_stop_card(card, 0);
  	ccw_device_set_offline(CARD_DDEV(card));
  	ccw_device_set_offline(CARD_WDEV(card));
  	ccw_device_set_offline(CARD_RDEV(card));
  	qdio_free(CARD_DDEV(card));
  	if (recover_flag == CARD_STATE_RECOVER)
  		card->state = CARD_STATE_RECOVER;
  	else
  		card->state = CARD_STATE_DOWN;
  	mutex_unlock(&card->conf_mutex);
  	mutex_unlock(&card->discipline_mutex);
  	return rc;
  }
  
  static int qeth_l3_set_online(struct ccwgroup_device *gdev)
  {
  	return __qeth_l3_set_online(gdev, 0);
  }
  
  static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
  			int recovery_mode)
  {
  	struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
  	int rc = 0, rc2 = 0, rc3 = 0;
  	enum qeth_card_states recover_flag;
  
  	mutex_lock(&card->discipline_mutex);
  	mutex_lock(&card->conf_mutex);
  	QETH_DBF_TEXT(SETUP, 3, "setoffl");
  	QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
  
  	if (card->dev && netif_carrier_ok(card->dev))
  		netif_carrier_off(card->dev);
  	recover_flag = card->state;
  	if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
  		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
  		card->info.hwtrap = 1;
  	}
  	qeth_l3_stop_card(card, recovery_mode);
  	if ((card->options.cq == QETH_CQ_ENABLED) && card->dev) {
  		rtnl_lock();
  		call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
  		rtnl_unlock();
  	}
  	rc  = ccw_device_set_offline(CARD_DDEV(card));
  	rc2 = ccw_device_set_offline(CARD_WDEV(card));
  	rc3 = ccw_device_set_offline(CARD_RDEV(card));
  	if (!rc)
  		rc = (rc2) ? rc2 : rc3;
  	if (rc)
  		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
  	qdio_free(CARD_DDEV(card));
  	if (recover_flag == CARD_STATE_UP)
  		card->state = CARD_STATE_RECOVER;
  	/* let user_space know that device is offline */
  	kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
  	mutex_unlock(&card->conf_mutex);
  	mutex_unlock(&card->discipline_mutex);
  	return 0;
  }
  
  static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
  {
  	return __qeth_l3_set_offline(cgdev, 0);
  }
  
  static int qeth_l3_recover(void *ptr)
  {
  	struct qeth_card *card;
  	int rc = 0;
  
  	card = (struct qeth_card *) ptr;
  	QETH_CARD_TEXT(card, 2, "recover1");
  	QETH_CARD_HEX(card, 2, &card, sizeof(void *));
  	if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
  		return 0;
  	QETH_CARD_TEXT(card, 2, "recover2");
  	dev_warn(&card->gdev->dev,
  		"A recovery process has been started for the device\n");
  	qeth_set_recovery_task(card);
  	__qeth_l3_set_offline(card->gdev, 1);
  	rc = __qeth_l3_set_online(card->gdev, 1);
  	if (!rc)
  		dev_info(&card->gdev->dev,
  			"Device successfully recovered!\n");
  	else {
  		qeth_close_dev(card);
  		dev_warn(&card->gdev->dev, "The qeth device driver "
  				"failed to recover an error on the device\n");
  	}
  	qeth_clear_recovery_task(card);
  	qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
  	qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
  	return 0;
  }
  
  static void qeth_l3_shutdown(struct ccwgroup_device *gdev)
  {
  	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
  	qeth_set_allowed_threads(card, 0, 1);
  	if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
  		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
  	qeth_qdio_clear_card(card, 0);
  	qeth_clear_qdio_buffers(card);
  	qdio_free(CARD_DDEV(card));
  }
  
  static int qeth_l3_pm_suspend(struct ccwgroup_device *gdev)
  {
  	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
  
  	if (card->dev)
  		netif_device_detach(card->dev);
  	qeth_set_allowed_threads(card, 0, 1);
  	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
  	if (gdev->state == CCWGROUP_OFFLINE)
  		return 0;
  	if (card->state == CARD_STATE_UP) {
  		if (card->info.hwtrap)
  			qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
  		__qeth_l3_set_offline(card->gdev, 1);
  	} else
  		__qeth_l3_set_offline(card->gdev, 0);
  	return 0;
  }
  
  static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
  {
  	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
  	int rc = 0;
  
  	if (gdev->state == CCWGROUP_OFFLINE)
  		goto out;
  
  	if (card->state == CARD_STATE_RECOVER) {
  		rc = __qeth_l3_set_online(card->gdev, 1);
  		if (rc) {
  			rtnl_lock();
  			dev_close(card->dev);
  			rtnl_unlock();
  		}
  	} else
  		rc = __qeth_l3_set_online(card->gdev, 0);
  out:
  	qeth_set_allowed_threads(card, 0xffffffff, 0);
  	if (card->dev)
  		netif_device_attach(card->dev);
  	if (rc)
  		dev_warn(&card->gdev->dev, "The qeth device driver "
  			"failed to recover an error on the device\n");
  	return rc;
  }
  
  /* Returns zero if the command is successfully "consumed" */
  static int qeth_l3_control_event(struct qeth_card *card,
  					struct qeth_ipa_cmd *cmd)
  {
  	return 1;
  }
  
  struct qeth_discipline qeth_l3_discipline = {
  	.start_poll = qeth_qdio_start_poll,
  	.input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
  	.output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
  	.recover = qeth_l3_recover,
  	.setup = qeth_l3_probe_device,
  	.remove = qeth_l3_remove_device,
  	.set_online = qeth_l3_set_online,
  	.set_offline = qeth_l3_set_offline,
  	.shutdown = qeth_l3_shutdown,
  	.freeze = qeth_l3_pm_suspend,
  	.thaw = qeth_l3_pm_resume,
  	.restore = qeth_l3_pm_resume,
  	.control_event_handler = qeth_l3_control_event,
  };
  EXPORT_SYMBOL_GPL(qeth_l3_discipline);
  
  static int qeth_l3_ip_event(struct notifier_block *this,
  			    unsigned long event, void *ptr)
  {
  	struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
  	struct net_device *dev = (struct net_device *)ifa->ifa_dev->dev;
  	struct qeth_ipaddr *addr;
  	struct qeth_card *card;
  
  	if (dev_net(dev) != &init_net)
  		return NOTIFY_DONE;
  
  	card = qeth_l3_get_card_from_dev(dev);
  	if (!card)
  		return NOTIFY_DONE;
  	QETH_CARD_TEXT(card, 3, "ipevent");
  
  	addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
  	if (addr != NULL) {
  		addr->u.a4.addr = ifa->ifa_address;
  		addr->u.a4.mask = ifa->ifa_mask;
  		addr->type = QETH_IP_TYPE_NORMAL;
  	} else
  		goto out;
  
  	switch (event) {
  	case NETDEV_UP:
  		if (!qeth_l3_add_ip(card, addr))
  			kfree(addr);
  		break;
  	case NETDEV_DOWN:
  		if (!qeth_l3_delete_ip(card, addr))
  			kfree(addr);
  		break;
  	default:
  		break;
  	}
  	qeth_l3_set_ip_addr_list(card);
  out:
  	return NOTIFY_DONE;
  }
  
  static struct notifier_block qeth_l3_ip_notifier = {
  	qeth_l3_ip_event,
  	NULL,
  };
  
  #ifdef CONFIG_QETH_IPV6
  /**
   * IPv6 event handler
   */
  static int qeth_l3_ip6_event(struct notifier_block *this,
  			     unsigned long event, void *ptr)
  {
  	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
  	struct net_device *dev = (struct net_device *)ifa->idev->dev;
  	struct qeth_ipaddr *addr;
  	struct qeth_card *card;
  
  	card = qeth_l3_get_card_from_dev(dev);
  	if (!card)
  		return NOTIFY_DONE;
  	QETH_CARD_TEXT(card, 3, "ip6event");
  	if (!qeth_is_supported(card, IPA_IPV6))
  		return NOTIFY_DONE;
  
  	addr = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
  	if (addr != NULL) {
  		memcpy(&addr->u.a6.addr, &ifa->addr, sizeof(struct in6_addr));
  		addr->u.a6.pfxlen = ifa->prefix_len;
  		addr->type = QETH_IP_TYPE_NORMAL;
  	} else
  		goto out;
  
  	switch (event) {
  	case NETDEV_UP:
  		if (!qeth_l3_add_ip(card, addr))
  			kfree(addr);
  		break;
  	case NETDEV_DOWN:
  		if (!qeth_l3_delete_ip(card, addr))
  			kfree(addr);
  		break;
  	default:
  		break;
  	}
  	qeth_l3_set_ip_addr_list(card);
  out:
  	return NOTIFY_DONE;
  }
  
  static struct notifier_block qeth_l3_ip6_notifier = {
  	qeth_l3_ip6_event,
  	NULL,
  };
  #endif
  
  static int qeth_l3_register_notifiers(void)
  {
  	int rc;
  
  	QETH_DBF_TEXT(SETUP, 5, "regnotif");
  	rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
  	if (rc)
  		return rc;
  #ifdef CONFIG_QETH_IPV6
  	rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
  	if (rc) {
  		unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
  		return rc;
  	}
  #else
  	pr_warning("There is no IPv6 support for the layer 3 discipline\n");
  #endif
  	return 0;
  }
  
  static void qeth_l3_unregister_notifiers(void)
  {
  
  	QETH_DBF_TEXT(SETUP, 5, "unregnot");
  	WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
  #ifdef CONFIG_QETH_IPV6
  	WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
  #endif /* QETH_IPV6 */
  }
  
  static int __init qeth_l3_init(void)
  {
  	int rc = 0;
  
  	pr_info("register layer 3 discipline\n");
  	rc = qeth_l3_register_notifiers();
  	return rc;
  }
  
  static void __exit qeth_l3_exit(void)
  {
  	qeth_l3_unregister_notifiers();
  	pr_info("unregister layer 3 discipline\n");
  }
  
  module_init(qeth_l3_init);
  module_exit(qeth_l3_exit);
  MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
  MODULE_DESCRIPTION("qeth layer 3 discipline");
  MODULE_LICENSE("GPL");
  