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qeth_l3_main.c

/*
 *  drivers/s390/net/qeth_l3_main.c
 *
 *    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/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 <net/ip.h>
#include <net/arp.h>
#include <net/ip6_checksum.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, "%02x%02x:%02x%02x:%02x%02x:%02x%02x"
                 ":%02x%02x:%02x%02x:%02x%02x:%02x%02x",
                 addr[0], addr[1], addr[2], addr[3],
                 addr[4], addr[5], addr[6], addr[7],
                 addr[8], addr[9], addr[10], addr[11],
                 addr[12], addr[13], addr[14], addr[15]);
}

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;
            }
      }
}

static 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;

      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_DBF_TEXT(TRACE, 2, "tkovaddr");
                        addr->set_flags |= QETH_IPA_SETIP_TAKEOVER_FLAG;
                  }
                  list_add_tail(&addr->entry, card->ip_tbd_list);
            }
            return 1;
      }
}

static int qeth_l3_delete_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
{
      unsigned long flags;
      int rc = 0;

      QETH_DBF_TEXT(TRACE, 4, "delip");

      if (addr->proto == QETH_PROT_IPV4)
            QETH_DBF_HEX(TRACE, 4, &addr->u.a4.addr, 4);
      else {
            QETH_DBF_HEX(TRACE, 4, &addr->u.a6.addr, 8);
            QETH_DBF_HEX(TRACE, 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;
}

static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *addr)
{
      unsigned long flags;
      int rc = 0;

      QETH_DBF_TEXT(TRACE, 4, "addip");
      if (addr->proto == QETH_PROT_IPV4)
            QETH_DBF_HEX(TRACE, 4, &addr->u.a4.addr, 4);
      else {
            QETH_DBF_HEX(TRACE, 4, &addr->u.a6.addr, 8);
            QETH_DBF_HEX(TRACE, 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;
}


static 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_DBF_TEXT(TRACE, 4, "delmc");
      iptodo = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
      if (!iptodo) {
            QETH_DBF_TEXT(TRACE, 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);
}

static 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_DBF_TEXT(TRACE, 2, "sdiplist");
      QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));

      spin_lock_irqsave(&card->ip_lock, flags);
      tbd_list = card->ip_tbd_list;
      card->ip_tbd_list = kmalloc(sizeof(struct list_head), GFP_ATOMIC);
      if (!card->ip_tbd_list) {
            QETH_DBF_TEXT(TRACE, 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_PRIMARY_ALREADY_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 clean,
                              int recover)
{
      struct qeth_ipaddr *addr, *tmp;
      unsigned long flags;

      QETH_DBF_TEXT(TRACE, 4, "clearip");
      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 (clean) {
                  spin_unlock_irqrestore(&card->ip_lock, flags);
                  qeth_l3_deregister_addr_entry(card, addr);
                  spin_lock_irqsave(&card->ip_lock, flags);
            }
            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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 4, "setdelip");
      QETH_DBF_TEXT_(TRACE, 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_DBF_TEXT(TRACE, 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 void 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;
            default:
                  goto out_inval;
            }
      } else {
            switch (*type) {
            case NO_ROUTER:
            case PRIMARY_ROUTER:
            case SECONDARY_ROUTER:
                  return;
            case MULTICAST_ROUTER:
                  if (qeth_is_ipafunc_supported(card, prot,
                                          IPA_OSA_MC_ROUTER))
                        return;
            default:
                  goto out_inval;
            }
      }
out_inval:
      *type = NO_ROUTER;
}

int qeth_l3_setrouting_v4(struct qeth_card *card)
{
      int rc;

      QETH_DBF_TEXT(TRACE, 3, "setrtg4");

      qeth_l3_correct_routing_type(card, &card->options.route4.type,
                          QETH_PROT_IPV4);

      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_DBF_TEXT(TRACE, 3, "setrtg6");
#ifdef CONFIG_QETH_IPV6

      if (!qeth_is_supported(card, IPA_IPV6))
            return 0;
      qeth_l3_correct_routing_type(card, &card->options.route6.type,
                          QETH_PROT_IPV6);

      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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 2, "addvipa4");
                  memcpy(&ipaddr->u.a4.addr, addr, 4);
                  ipaddr->u.a4.mask = 0;
            } else if (proto == QETH_PROT_IPV6) {
                  QETH_DBF_TEXT(TRACE, 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) {
            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_DBF_TEXT(TRACE, 2, "delvipa4");
                  memcpy(&ipaddr->u.a4.addr, addr, 4);
                  ipaddr->u.a4.mask = 0;
            } else if (proto == QETH_PROT_IPV6) {
                  QETH_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 2, "addrxip4");
                  memcpy(&ipaddr->u.a4.addr, addr, 4);
                  ipaddr->u.a4.mask = 0;
            } else if (proto == QETH_PROT_IPV6) {
                  QETH_DBF_TEXT(TRACE, 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) {
            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_DBF_TEXT(TRACE, 2, "addrxip4");
                  memcpy(&ipaddr->u.a4.addr, addr, 4);
                  ipaddr->u.a4.mask = 0;
            } else if (proto == QETH_PROT_IPV6) {
                  QETH_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 2, "setaddr4");
            QETH_DBF_HEX(TRACE, 3, &addr->u.a4.addr, sizeof(int));
      } else if (addr->proto == QETH_PROT_IPV6) {
            QETH_DBF_TEXT(TRACE, 2, "setaddr6");
            QETH_DBF_HEX(TRACE, 3, &addr->u.a6.addr, 8);
            QETH_DBF_HEX(TRACE, 3, ((char *)&addr->u.a6.addr) + 8, 8);
      } else {
            QETH_DBF_TEXT(TRACE, 2, "setaddr?");
            QETH_DBF_HEX(TRACE, 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_DBF_TEXT(TRACE, 2, "failed");
      } while ((--cnt > 0) && rc);
      if (rc) {
            QETH_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 2, "deladdr4");
            QETH_DBF_HEX(TRACE, 3, &addr->u.a4.addr, sizeof(int));
      } else if (addr->proto == QETH_PROT_IPV6) {
            QETH_DBF_TEXT(TRACE, 2, "deladdr6");
            QETH_DBF_HEX(TRACE, 3, &addr->u.a6.addr, 8);
            QETH_DBF_HEX(TRACE, 3, ((char *)&addr->u.a6.addr) + 8, 8);
      } else {
            QETH_DBF_TEXT(TRACE, 2, "deladdr?");
            QETH_DBF_HEX(TRACE, 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_DBF_TEXT(TRACE, 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_send_setadp_mode(struct qeth_card *card, __u32 command,
                              __u32 mode)
{
      int rc;
      struct qeth_cmd_buffer *iob;
      struct qeth_ipa_cmd *cmd;

      QETH_DBF_TEXT(TRACE, 4, "adpmode");

      iob = qeth_get_adapter_cmd(card, command,
                           sizeof(struct qeth_ipacmd_setadpparms));
      cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
      cmd->data.setadapterparms.data.mode = mode;
      rc = qeth_send_ipa_cmd(card, iob, qeth_default_setadapterparms_cb,
                         NULL);
      return rc;
}

static int qeth_l3_setadapter_hstr(struct qeth_card *card)
{
      int rc;

      QETH_DBF_TEXT(TRACE, 4, "adphstr");

      if (qeth_adp_supported(card, IPA_SETADP_SET_BROADCAST_MODE)) {
            rc = qeth_l3_send_setadp_mode(card,
                              IPA_SETADP_SET_BROADCAST_MODE,
                              card->options.broadcast_mode);
            if (rc)
                  QETH_DBF_MESSAGE(2, "couldn't set broadcast mode on "
                           "device %s: x%x\n",
                           CARD_BUS_ID(card), rc);
            rc = qeth_l3_send_setadp_mode(card,
                              IPA_SETADP_ALTER_MAC_ADDRESS,
                              card->options.macaddr_mode);
            if (rc)
                  QETH_DBF_MESSAGE(2, "couldn't set macaddr mode on "
                           "device %s: x%x\n", CARD_BUS_ID(card), rc);
            return rc;
      }
      if (card->options.broadcast_mode == QETH_TR_BROADCAST_LOCAL)
            QETH_DBF_MESSAGE(2, "set adapter parameters not available "
                     "to set broadcast mode, using ALLRINGS "
                     "on device %s:\n", CARD_BUS_ID(card));
      if (card->options.macaddr_mode == QETH_TR_MACADDR_CANONICAL)
            QETH_DBF_MESSAGE(2, "set adapter parameters not available "
                     "to set macaddr mode, using NONCANONICAL "
                     "on device %s:\n", CARD_BUS_ID(card));
      return 0;
}

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");
      }

      if ((card->info.link_type == QETH_LINK_TYPE_HSTR) ||
          (card->info.link_type == QETH_LINK_TYPE_LANE_TR))
            rc = qeth_l3_setadapter_hstr(card);

      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_DBF_TEXT(TRACE, 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_DBF_TEXT_(TRACE, 3, "csum:%d", card->info.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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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;
}

static int qeth_l3_query_ipassists_cb(struct qeth_card *card,
            struct qeth_reply *reply, unsigned long data)
{
      struct qeth_ipa_cmd *cmd;

      QETH_DBF_TEXT(SETUP, 2, "qipasscb");

      cmd = (struct qeth_ipa_cmd *) data;
      if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
            card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
            card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
      } else {
            card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
            card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
      }
      QETH_DBF_TEXT(SETUP, 2, "suppenbl");
      QETH_DBF_TEXT_(SETUP, 2, "%x", cmd->hdr.ipa_supported);
      QETH_DBF_TEXT_(SETUP, 2, "%x", cmd->hdr.ipa_enabled);
      return 0;
}

static int qeth_l3_query_ipassists(struct qeth_card *card,
                        enum qeth_prot_versions prot)
{
      int rc;
      struct qeth_cmd_buffer *iob;

      QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
      iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
      rc = qeth_send_ipa_cmd(card, iob, qeth_l3_query_ipassists_cb, NULL);
      return rc;
}

#ifdef CONFIG_QETH_IPV6
static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
{
      int rc;

      QETH_DBF_TEXT(TRACE, 3, "softipv6");

      if (card->info.type == QETH_CARD_TYPE_IQD)
            goto out;

      rc = qeth_l3_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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_start_ipa_checksum(struct qeth_card *card)
{
      int rc = 0;

      QETH_DBF_TEXT(TRACE, 3, "strtcsum");

      if (card->options.checksum_type == NO_CHECKSUMMING) {
            dev_info(&card->gdev->dev,
                  "Using no checksumming on %s.\n",
                  QETH_CARD_IFNAME(card));
            return 0;
      }
      if (card->options.checksum_type == SW_CHECKSUMMING) {
            dev_info(&card->gdev->dev,
                  "Using SW checksumming on %s.\n",
                  QETH_CARD_IFNAME(card));
            return 0;
      }
      if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
            dev_info(&card->gdev->dev,
                  "Inbound HW Checksumming not "
                  "supported on %s,\ncontinuing "
                  "using Inbound SW Checksumming\n",
                  QETH_CARD_IFNAME(card));
            card->options.checksum_type = SW_CHECKSUMMING;
            return 0;
      }
      rc = qeth_l3_send_checksum_command(card);
      if (!rc)
            dev_info(&card->gdev->dev,
                  "HW Checksumming (inbound) enabled\n");

      return rc;
}

static int qeth_l3_start_ipa_tso(struct qeth_card *card)
{
      int rc;

      QETH_DBF_TEXT(TRACE, 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->options.large_send == QETH_LARGE_SEND_TSO)) {
            card->options.large_send = QETH_LARGE_SEND_NO;
            card->dev->features &= ~(NETIF_F_TSO | NETIF_F_SG);
      }
      return rc;
}

static int qeth_l3_start_ipassists(struct qeth_card *card)
{
      QETH_DBF_TEXT(TRACE, 3, "strtipas");
      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_tso(card);        /* go on*/
      return 0;
}

static int qeth_l3_put_unique_id(struct qeth_card *card)
{

      int rc = 0;
      struct qeth_cmd_buffer *iob;
      struct qeth_ipa_cmd *cmd;

      QETH_DBF_TEXT(TRACE, 2, "puniqeid");

      if ((card->info.unique_id & UNIQUE_ID_NOT_BY_CARD) ==
            UNIQUE_ID_NOT_BY_CARD)
            return -1;
      iob = qeth_get_ipacmd_buffer(card, IPA_CMD_DESTROY_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;
      memcpy(&cmd->data.create_destroy_addr.unique_id[0],
             card->dev->dev_addr, OSA_ADDR_LEN);
      rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
      return rc;
}

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
            random_ether_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 void qeth_l3_get_mac_for_ipm(__u32 ipm, char *mac,
                        struct net_device *dev)
{
      if (dev->type == ARPHRD_IEEE802_TR)
            ip_tr_mc_map(ipm, mac);
      else
            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_DBF_TEXT(TRACE, 4, "addmc");
      for (im4 = in4_dev->mc_list; im4; im4 = im4->next) {
            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);
      }
}

static void qeth_l3_add_vlan_mc(struct qeth_card *card)
{
      struct in_device *in_dev;
      struct vlan_group *vg;
      int i;

      QETH_DBF_TEXT(TRACE, 4, "addmcvl");
      if (!qeth_is_supported(card, IPA_FULL_VLAN) || (card->vlangrp == NULL))
            return;

      vg = card->vlangrp;
      for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
            struct net_device *netdev = vlan_group_get_device(vg, i);
            if (netdev == NULL ||
                !(netdev->flags & IFF_UP))
                  continue;
            in_dev = in_dev_get(netdev);
            if (!in_dev)
                  continue;
            read_lock(&in_dev->mc_list_lock);
            qeth_l3_add_mc(card, in_dev);
            read_unlock(&in_dev->mc_list_lock);
            in_dev_put(in_dev);
      }
}

static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
{
      struct in_device *in4_dev;

      QETH_DBF_TEXT(TRACE, 4, "chkmcv4");
      in4_dev = in_dev_get(card->dev);
      if (in4_dev == NULL)
            return;
      read_lock(&in4_dev->mc_list_lock);
      qeth_l3_add_mc(card, in4_dev);
      qeth_l3_add_vlan_mc(card);
      read_unlock(&in4_dev->mc_list_lock);
      in_dev_put(in4_dev);
}

#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_DBF_TEXT(TRACE, 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);
      }
}

static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
{
      struct inet6_dev *in_dev;
      struct vlan_group *vg;
      int i;

      QETH_DBF_TEXT(TRACE, 4, "admc6vl");
      if (!qeth_is_supported(card, IPA_FULL_VLAN) || (card->vlangrp == NULL))
            return;

      vg = card->vlangrp;
      for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
            struct net_device *netdev = vlan_group_get_device(vg, i);
            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_DBF_TEXT(TRACE, 4, "chkmcv6");
      if (!qeth_is_supported(card, IPA_IPV6))
            return ;
      in6_dev = in6_dev_get(card->dev);
      if (in6_dev == NULL)
            return;
      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);
      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;

      QETH_DBF_TEXT(TRACE, 4, "frvaddr4");

      in_dev = in_dev_get(vlan_group_get_device(card->vlangrp, vid));
      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;

      QETH_DBF_TEXT(TRACE, 4, "frvaddr6");

      in6_dev = in6_dev_get(vlan_group_get_device(card->vlangrp, vid));
      if (!in6_dev)
            return;
      for (ifa = in6_dev->addr_list; ifa; ifa = ifa->lst_next) {
            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)
{
      if (!card->vlangrp)
            return;
      qeth_l3_free_vlan_addresses4(card, vid);
      qeth_l3_free_vlan_addresses6(card, vid);
}

static void qeth_l3_vlan_rx_register(struct net_device *dev,
                  struct vlan_group *grp)
{
      struct qeth_card *card = dev->ml_priv;
      unsigned long flags;

      QETH_DBF_TEXT(TRACE, 4, "vlanreg");
      spin_lock_irqsave(&card->vlanlock, flags);
      card->vlangrp = grp;
      spin_unlock_irqrestore(&card->vlanlock, flags);
}

static void qeth_l3_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
{
      return;
}

static void qeth_l3_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
{
      struct qeth_card *card = dev->ml_priv;
      unsigned long flags;

      QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
      if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
            QETH_DBF_TEXT(TRACE, 3, "kidREC");
            return;
      }
      spin_lock_irqsave(&card->vlanlock, flags);
      /* unregister IP addresses of vlan device */
      qeth_l3_free_vlan_addresses(card, vid);
      vlan_group_set_device(card->vlangrp, vid, NULL);
      spin_unlock_irqrestore(&card->vlanlock, flags);
      qeth_l3_set_multicast_list(card->dev);
}

static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card,
                  struct sk_buff *skb, struct qeth_hdr *hdr)
{
      unsigned short vlan_id = 0;
      __be16 prot;
      struct iphdr *ip_hdr;
      unsigned char tg_addr[MAX_ADDR_LEN];

      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;
                        (card->dev->type == ARPHRD_IEEE802_TR) ?
                        ip_tr_mc_map(ip_hdr->daddr, tg_addr):
                        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:
                  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);
      }

#ifdef CONFIG_TR
      if (card->dev->type == ARPHRD_IEEE802_TR)
            skb->protocol = tr_type_trans(skb, card->dev);
      else
#endif
            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]);
      }

      switch (card->options.checksum_type) {
      case SW_CHECKSUMMING:
            skb->ip_summed = CHECKSUM_NONE;
            break;
      case NO_CHECKSUMMING:
            skb->ip_summed = CHECKSUM_UNNECESSARY;
            break;
      case HW_CHECKSUMMING:
            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;
      }

      return vlan_id;
}

static void qeth_l3_process_inbound_buffer(struct qeth_card *card,
                      struct qeth_qdio_buffer *buf, int index)
{
      struct qdio_buffer_element *element;
      struct sk_buff *skb;
      struct qeth_hdr *hdr;
      int offset;
      __u16 vlan_tag = 0;
      unsigned int len;

      /* get first element of current buffer */
      element = (struct qdio_buffer_element *)&buf->buffer->element[0];
      offset = 0;
      if (card->options.performance_stats)
            card->perf_stats.bufs_rec++;
      while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
                               &offset, &hdr))) {
            skb->dev = card->dev;
            /* is device UP ? */
            if (!(card->dev->flags & IFF_UP)) {
                  dev_kfree_skb_any(skb);
                  continue;
            }

            switch (hdr->hdr.l3.id) {
            case QETH_HEADER_TYPE_LAYER3:
                  vlan_tag = qeth_l3_rebuild_skb(card, skb, hdr);
                  len = skb->len;
                  if (vlan_tag)
                        if (card->vlangrp)
                              vlan_hwaccel_rx(skb, card->vlangrp,
                                    vlan_tag);
                        else {
                              dev_kfree_skb_any(skb);
                              continue;
                        }
                  else
                        netif_rx(skb);
                  break;
            default:
                  dev_kfree_skb_any(skb);
                  QETH_DBF_TEXT(TRACE, 3, "inbunkno");
                  QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
                  continue;
            }

            card->dev->last_rx = jiffies;
            card->stats.rx_packets++;
            card->stats.rx_bytes += len;
      }
}

static int qeth_l3_verify_vlan_dev(struct net_device *dev,
                  struct qeth_card *card)
{
      int rc = 0;
      struct vlan_group *vg;
      int i;

      vg = card->vlangrp;
      if (!vg)
            return rc;

      for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
            if (vlan_group_get_device(vg, i) == 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;
      QETH_DBF_TEXT_(TRACE, 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->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 {
                  if (card->dev) {
                        rtnl_lock();
                        dev_close(card->dev);
                        rtnl_unlock();
                  }
            }
            if (!card->use_hard_stop) {
                  rc = qeth_send_stoplan(card);
                  if (rc)
                        QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
            }
            card->state = CARD_STATE_SOFTSETUP;
      }
      if (card->state == CARD_STATE_SOFTSETUP) {
            qeth_l3_clear_ip_list(card, !card->use_hard_stop, 1);
            qeth_clear_ipacmd_list(card);
            card->state = CARD_STATE_HARDSETUP;
      }
      if (card->state == CARD_STATE_HARDSETUP) {
            if (!card->use_hard_stop &&
                (card->info.type != QETH_CARD_TYPE_IQD)) {
                  rc = qeth_l3_put_unique_id(card);
                  if (rc)
                        QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
            }
            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);
      }
      card->use_hard_stop = 0;
      return rc;
}

static void qeth_l3_set_multicast_list(struct net_device *dev)
{
      struct qeth_card *card = dev->ml_priv;

      QETH_DBF_TEXT(TRACE, 3, "setmulti");
      if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
          (card->state != CARD_STATE_UP))
            return;
      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_setadp_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_DBF_TEXT(TRACE, 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 void qeth_l3_copy_arp_entries_stripped(struct qeth_arp_query_info *qinfo,
            struct qeth_arp_query_data *qdata, int entry_size,
            int uentry_size)
{
      char *entry_ptr;
      char *uentry_ptr;
      int i;

      entry_ptr = (char *)&qdata->data;
      uentry_ptr = (char *)(qinfo->udata + qinfo->udata_offset);
      for (i = 0; i < qdata->no_entries; ++i) {
            /* strip off 32 bytes "media specific information" */
            memcpy(uentry_ptr, (entry_ptr + 32), entry_size - 32);
            entry_ptr += entry_size;
            uentry_ptr += uentry_size;
      }
}

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 entry_size;
      int uentry_size;
      int i;

      QETH_DBF_TEXT(TRACE, 4, "arpquecb");

      qinfo = (struct qeth_arp_query_info *) reply->param;
      cmd = (struct qeth_ipa_cmd *) data;
      if (cmd->hdr.return_code) {
            QETH_DBF_TEXT_(TRACE, 4, "qaer1%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_DBF_TEXT_(TRACE, 4, "qaer2%i", cmd->hdr.return_code);
            return 0;
      }
      qdata = &cmd->data.setassparms.data.query_arp;
      switch (qdata->reply_bits) {
      case 5:
            uentry_size = entry_size = sizeof(struct qeth_arp_qi_entry5);
            if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
                  uentry_size = sizeof(struct qeth_arp_qi_entry5_short);
            break;
      case 7:
            /* fall through to default */
      default:
            /* tr is the same as eth -> entry7 */
            uentry_size = entry_size = sizeof(struct qeth_arp_qi_entry7);
            if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
                  uentry_size = sizeof(struct qeth_arp_qi_entry7_short);
            break;
      }
      /* check if there is enough room in userspace */
      if ((qinfo->udata_len - qinfo->udata_offset) <
                  qdata->no_entries * uentry_size){
            QETH_DBF_TEXT_(TRACE, 4, "qaer3%i", -ENOMEM);
            cmd->hdr.return_code = -ENOMEM;
            goto out_error;
      }
      QETH_DBF_TEXT_(TRACE, 4, "anore%i",
                   cmd->data.setassparms.hdr.number_of_replies);
      QETH_DBF_TEXT_(TRACE, 4, "aseqn%i", cmd->data.setassparms.hdr.seq_no);
      QETH_DBF_TEXT_(TRACE, 4, "anoen%i", qdata->no_entries);

      if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) {
            /* strip off "media specific information" */
            qeth_l3_copy_arp_entries_stripped(qinfo, qdata, entry_size,
                                     uentry_size);
      } else
            /*copy entries to user buffer*/
            memcpy(qinfo->udata + qinfo->udata_offset,
                   (char *)&qdata->data, qdata->no_entries*uentry_size);

      qinfo->no_entries += qdata->no_entries;
      qinfo->udata_offset += (qdata->no_entries*uentry_size);
      /* check if all replies received ... */
      if (cmd->data.setassparms.hdr.seq_no <
          cmd->data.setassparms.hdr.number_of_replies)
            return 1;
      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);
      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_DBF_TEXT(TRACE, 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_arp_query(struct qeth_card *card, char __user *udata)
{
      struct qeth_cmd_buffer *iob;
      struct qeth_arp_query_info qinfo = {0, };
      int tmp;
      int rc;

      QETH_DBF_TEXT(TRACE, 3, "arpquery");

      if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
                         IPA_ARP_PROCESSING)) {
            return -EOPNOTSUPP;
      }
      /* get size of userspace buffer and mask_bits -> 6 bytes */
      if (copy_from_user(&qinfo, udata, 6))
            return -EFAULT;
      qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
      if (!qinfo.udata)
            return -ENOMEM;
      qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
      iob = qeth_l3_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
                               IPA_CMD_ASS_ARP_QUERY_INFO,
                               sizeof(int), QETH_PROT_IPV4);

      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);
            if (copy_to_user(udata, qinfo.udata, 4))
                  rc = -EFAULT;
      } else {
            if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
                  rc = -EFAULT;
      }
      kfree(qinfo.udata);
      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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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_OSAE) &&
                !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;
      default:
            rc = -EOPNOTSUPP;
      }
      if (rc)
            QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
      return rc;
}

static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
            struct sk_buff *skb, int ipv, int cast_type)
{
      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 (card->vlangrp && 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);
      if (ipv == 4) {
            /* IPv4 */
            hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags4(cast_type);
            memset(hdr->hdr.l3.dest_addr, 0, 12);
            if ((skb_dst(skb)) && (skb_dst(skb)->neighbour)) {
                  *((u32 *) (&hdr->hdr.l3.dest_addr[12])) =
                      *((u32 *) skb_dst(skb)->neighbour->primary_key);
            } else {
                  /* fill in destination address used in ip header */
                  *((u32 *) (&hdr->hdr.l3.dest_addr[12])) =
                                          ip_hdr(skb)->daddr;
            }
      } else if (ipv == 6) {
            /* 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;
            if ((skb_dst(skb)) && (skb_dst(skb)->neighbour)) {
                  memcpy(hdr->hdr.l3.dest_addr,
                         skb_dst(skb)->neighbour->primary_key, 16);
            } else {
                  /* fill in destination address used in ip header */
                  memcpy(hdr->hdr.l3.dest_addr,
                         &ipv6_hdr(skb)->daddr, 16);
            }
      } else {
            /* passthrough */
            if ((skb->dev->type == ARPHRD_IEEE802_TR) &&
                  !memcmp(skb->data + sizeof(struct qeth_hdr) +
                  sizeof(__u16), skb->dev->broadcast, 6)) {
                  hdr->hdr.l3.flags = QETH_CAST_BROADCAST |
                                    QETH_HDR_PASSTHRU;
            } 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;
            }
      }
}

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;
      /*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 void qeth_tx_csum(struct sk_buff *skb)
{
      __wsum csum;
      int offset;

      skb_set_transport_header(skb, skb->csum_start - skb_headroom(skb));
      offset = skb->csum_start - skb_headroom(skb);
      BUG_ON(offset >= skb_headlen(skb));
      csum = skb_checksum(skb, offset, skb->len - offset, 0);

      offset += skb->csum_offset;
      BUG_ON(offset + sizeof(__sum16) > skb_headlen(skb));
      *(__sum16 *)(skb->data + offset) = csum_fold(csum);
}

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_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;
      enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
      int data_offset = -1;
      int nr_frags;

      if ((card->info.type == QETH_CARD_TYPE_IQD) &&
          (skb->protocol != htons(ETH_P_IPV6)) &&
          (skb->protocol != htons(ETH_P_IP)))
                  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();
      }

      if (skb_is_gso(skb))
            large_send = card->options.large_send;
      else
            if (skb->ip_summed == CHECKSUM_PARTIAL) {
                  qeth_tx_csum(skb);
                  if (card->options.performance_stats)
                        card->perf_stats.tx_csum++;
            }

      if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
          (skb_shinfo(skb)->nr_frags == 0)) {
            new_skb = skb;
            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 (new_skb->protocol == htons(ETH_P_IP)) {
                  if (card->dev->type == ARPHRD_IEEE802_TR)
                        skb_pull(new_skb, TR_HLEN);
                  else
                        skb_pull(new_skb, ETH_HLEN);
            }

            if (new_skb->protocol == ETH_P_IPV6 && card->vlangrp &&
                        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));
                  new_skb->vlan_tci = 0;
            }
      }

      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 == QETH_LARGE_SEND_TSO) &&
          ((skb_shinfo(new_skb)->nr_frags + 2) > 16)) {
            if (skb_linearize(new_skb))
                  goto tx_drop;
      }

      if ((large_send == QETH_LARGE_SEND_TSO) &&
          (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 {
                  qeth_l3_fill_header(card, hdr, new_skb, ipv,
                                    cast_type);
                  hdr->hdr.l3.length = new_skb->len - data_offset;
            }
      }

      elems = qeth_get_elements_no(card, (void *)hdr, 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)
            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 != QETH_LARGE_SEND_NO) {
                        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;
                  }
            }
      } 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;

      QETH_DBF_TEXT(TRACE, 4, "qethopen");
      if (card->state != CARD_STATE_SOFTSETUP)
            return -ENODEV;
      card->data.state = CH_STATE_UP;
      card->state = CARD_STATE_UP;
      netif_start_queue(dev);

      if (!card->lan_online && netif_carrier_ok(dev))
            netif_carrier_off(dev);
      return 0;
}

static int qeth_l3_stop(struct net_device *dev)
{
      struct qeth_card *card = dev->ml_priv;

      QETH_DBF_TEXT(TRACE, 4, "qethstop");
      netif_tx_disable(dev);
      if (card->state == CARD_STATE_UP)
            card->state = CARD_STATE_SOFTSETUP;
      return 0;
}

static u32 qeth_l3_ethtool_get_rx_csum(struct net_device *dev)
{
      struct qeth_card *card = dev->ml_priv;

      return (card->options.checksum_type == HW_CHECKSUMMING);
}

static int qeth_l3_ethtool_set_rx_csum(struct net_device *dev, u32 data)
{
      struct qeth_card *card = dev->ml_priv;
      enum qeth_card_states old_state;
      enum qeth_checksum_types csum_type;

      if ((card->state != CARD_STATE_UP) &&
          (card->state != CARD_STATE_DOWN))
            return -EPERM;

      if (data)
            csum_type = HW_CHECKSUMMING;
      else
            csum_type = SW_CHECKSUMMING;

      if (card->options.checksum_type != csum_type) {
            old_state = card->state;
            if (card->state == CARD_STATE_UP)
                  __qeth_l3_set_offline(card->gdev, 1);
            card->options.checksum_type = csum_type;
            if (old_state == CARD_STATE_UP)
                  __qeth_l3_set_online(card->gdev, 1);
      }
      return 0;
}

static int qeth_l3_ethtool_set_tso(struct net_device *dev, u32 data)
{
      struct qeth_card *card = dev->ml_priv;

      if (data) {
            if (card->options.large_send == QETH_LARGE_SEND_NO) {
                  if (card->info.type == QETH_CARD_TYPE_IQD)
                        return -EPERM;
                  else
                        card->options.large_send = QETH_LARGE_SEND_TSO;
                  dev->features |= NETIF_F_TSO;
            }
      } else {
            dev->features &= ~NETIF_F_TSO;
            card->options.large_send = QETH_LARGE_SEND_NO;
      }
      return 0;
}

static struct ethtool_ops qeth_l3_ethtool_ops = {
      .get_link = ethtool_op_get_link,
      .get_tx_csum = ethtool_op_get_tx_csum,
      .set_tx_csum = ethtool_op_set_tx_hw_csum,
      .get_rx_csum = qeth_l3_ethtool_get_rx_csum,
      .set_rx_csum = qeth_l3_ethtool_set_rx_csum,
      .get_sg      = ethtool_op_get_sg,
      .set_sg      = ethtool_op_set_sg,
      .get_tso     = ethtool_op_get_tso,
      .set_tso     = qeth_l3_ethtool_set_tso,
      .get_strings = qeth_core_get_strings,
      .get_ethtool_stats = qeth_core_get_ethtool_stats,
      .get_stats_count = qeth_core_get_stats_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_multicast_list = qeth_l3_set_multicast_list,
      .ndo_do_ioctl           = qeth_l3_do_ioctl,
      .ndo_change_mtu         = qeth_change_mtu,
      .ndo_vlan_rx_register   = qeth_l3_vlan_rx_register,
      .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_multicast_list = qeth_l3_set_multicast_list,
      .ndo_do_ioctl           = qeth_l3_do_ioctl,
      .ndo_change_mtu         = qeth_change_mtu,
      .ndo_vlan_rx_register   = qeth_l3_vlan_rx_register,
      .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_OSAE) {
            if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
                (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
#ifdef CONFIG_TR
                  card->dev = alloc_trdev(0);
#endif
                  if (!card->dev)
                        return -ENODEV;
                  card->dev->netdev_ops = &qeth_l3_netdev_ops;
            } 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;
            }
      } 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);
      } 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_TX |
                        NETIF_F_HW_VLAN_RX |
                        NETIF_F_HW_VLAN_FILTER;
      card->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;

      SET_NETDEV_DEV(card->dev, &card->gdev->dev);
      return register_netdev(card->dev);
}

static void qeth_l3_qdio_input_handler(struct ccw_device *ccwdev,
            unsigned int qdio_err, unsigned int queue, int first_element,
            int count, unsigned long card_ptr)
{
      struct net_device *net_dev;
      struct qeth_card *card;
      struct qeth_qdio_buffer *buffer;
      int index;
      int i;

      card = (struct qeth_card *) card_ptr;
      net_dev = card->dev;
      if (card->options.performance_stats) {
            card->perf_stats.inbound_cnt++;
            card->perf_stats.inbound_start_time = qeth_get_micros();
      }
      if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
            QETH_DBF_TEXT(TRACE, 1, "qdinchk");
            QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
            QETH_DBF_TEXT_(TRACE, 1, "%04X%04X",
                        first_element, count);
            QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
            qeth_schedule_recovery(card);
            return;
      }
      for (i = first_element; i < (first_element + count); ++i) {
            index = i % QDIO_MAX_BUFFERS_PER_Q;
            buffer = &card->qdio.in_q->bufs[index];
            if (!(qdio_err &&
                  qeth_check_qdio_errors(buffer->buffer,
                                   qdio_err, "qinerr")))
                  qeth_l3_process_inbound_buffer(card, buffer, index);
            /* clear buffer and give back to hardware */
            qeth_put_buffer_pool_entry(card, buffer->pool_entry);
            qeth_queue_input_buffer(card, index);
      }
      if (card->options.performance_stats)
            card->perf_stats.inbound_time += qeth_get_micros() -
                  card->perf_stats.inbound_start_time;
}

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->discipline.input_handler = (qdio_handler_t *)
            qeth_l3_qdio_input_handler;
      card->discipline.output_handler = (qdio_handler_t *)
            qeth_qdio_output_handler;
      card->discipline.recover = qeth_l3_recover;
      return 0;
}

static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
{
      struct qeth_card *card = dev_get_drvdata(&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) {
            card->use_hard_stop = 1;
            qeth_l3_set_offline(cgdev);
      }

      if (card->dev) {
            unregister_netdev(card->dev);
            card->dev = NULL;
      }

      qeth_l3_remove_device_attributes(&cgdev->dev);
      qeth_l3_clear_ip_list(card, 0, 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;

      BUG_ON(!card);
      QETH_DBF_TEXT(SETUP, 2, "setonlin");
      QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));

      qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);

      recover_flag = card->state;
      rc = ccw_device_set_online(CARD_RDEV(card));
      if (rc) {
            QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
            return -EIO;
      }
      rc = ccw_device_set_online(CARD_WDEV(card));
      if (rc) {
            QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
            return -EIO;
      }
      rc = ccw_device_set_online(CARD_DDEV(card));
      if (rc) {
            QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
            return -EIO;
      }

      rc = qeth_core_hardsetup_card(card);
      if (rc) {
            QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
            goto out_remove;
      }

      qeth_l3_query_ipassists(card, QETH_PROT_IPV4);

      if (!card->dev && qeth_l3_setup_netdev(card))
            goto out_remove;

      card->state = CARD_STATE_HARDSETUP;
      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;
                  return 0;
            }
            goto out_remove;
      } else
            card->lan_online = 1;
      qeth_set_large_send(card, card->options.large_send);

      rc = qeth_l3_setadapter_parms(card);
      if (rc)
            QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
      rc = qeth_l3_start_ipassists(card);
      if (rc)
            QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
      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);
            goto out_remove;
      }
      card->state = CARD_STATE_SOFTSETUP;
      netif_carrier_on(card->dev);

      qeth_set_allowed_threads(card, 0xffffffff, 0);
      if (recover_flag == CARD_STATE_RECOVER) {
            if (recovery_mode)
                  qeth_l3_open(card->dev);
            else {
                  rtnl_lock();
                  dev_open(card->dev);
                  rtnl_unlock();
            }
            qeth_l3_set_multicast_list(card->dev);
      }
      /* let user_space know that device is online */
      kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
      return 0;
out_remove:
      card->use_hard_stop = 1;
      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));
      if (recover_flag == CARD_STATE_RECOVER)
            card->state = CARD_STATE_RECOVER;
      else
            card->state = CARD_STATE_DOWN;
      return -ENODEV;
}

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;

      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;
      qeth_l3_stop_card(card, recovery_mode);
      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);
      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);
      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_DBF_TEXT(TRACE, 2, "recover1");
      QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
      if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
            return 0;
      QETH_DBF_TEXT(TRACE, 2, "recover2");
      dev_warn(&card->gdev->dev,
            "A recovery process has been started for the device\n");
      card->use_hard_stop = 1;
      __qeth_l3_set_offline(card->gdev, 1);
      rc = __qeth_l3_set_online(card->gdev, 1);
      /* don't run another scheduled recovery */
      qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
      qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
      if (!rc)
            dev_info(&card->gdev->dev,
                  "Device successfully recovered!\n");
      else {
            rtnl_lock();
            dev_close(card->dev);
            rtnl_unlock();
            dev_warn(&card->gdev->dev, "The qeth device driver "
                  "failed to recover an error on the device\n");
      }
      return 0;
}

static void qeth_l3_shutdown(struct ccwgroup_device *gdev)
{
      struct qeth_card *card = dev_get_drvdata(&gdev->dev);
      qeth_l3_clear_ip_list(card, 0, 0);
      qeth_qdio_clear_card(card, 0);
      qeth_clear_qdio_buffers(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) {
            card->use_hard_stop = 1;
            __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) {
                  if (card->dev) {
                        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;
}

struct ccwgroup_driver qeth_l3_ccwgroup_driver = {
      .probe = 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,
};
EXPORT_SYMBOL_GPL(qeth_l3_ccwgroup_driver);

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;

      QETH_DBF_TEXT(TRACE, 3, "ipevent");
      card = qeth_l3_get_card_from_dev(dev);
      if (!card)
            return NOTIFY_DONE;

      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;

      QETH_DBF_TEXT(TRACE, 3, "ip6event");

      card = qeth_l3_get_card_from_dev(dev);
      if (!card)
            return NOTIFY_DONE;
      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(TRACE, 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(TRACE, 5, "unregnot");
      BUG_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
#ifdef CONFIG_QETH_IPV6
      BUG_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");

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