// SPDX-License-Identifier: GPL-2.0
/*
 *    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/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/skbuff.h>

#include <net/iucv/af_iucv.h>
#include <net/dsfield.h>

#include <asm/ebcdic.h>
#include <asm/chpid.h>
#include <asm/io.h>
#include <asm/sysinfo.h>
#include <asm/compat.h>
#include <asm/diag.h>
#include <asm/cio.h>
#include <asm/ccwdev.h>
#include <asm/cpcmd.h>

#include "qeth_core.h"

struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
        /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
        /*                   N  P  A    M  L  V                      H  */
        [QETH_DBF_SETUP] = {"qeth_setup",
                                8, 1,   8, 5, &debug_hex_ascii_view, NULL},
        [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
                            &debug_sprintf_view, NULL},
        [QETH_DBF_CTRL]  = {"qeth_control",
                8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
};
EXPORT_SYMBOL_GPL(qeth_dbf);

struct qeth_card_list_struct qeth_core_card_list;
EXPORT_SYMBOL_GPL(qeth_core_card_list);
struct kmem_cache *qeth_core_header_cache;
EXPORT_SYMBOL_GPL(qeth_core_header_cache);
static struct kmem_cache *qeth_qdio_outbuf_cache;

static struct device *qeth_core_root_dev;
static struct lock_class_key qdio_out_skb_queue_key;
static struct mutex qeth_mod_mutex;

static void qeth_send_control_data_cb(struct qeth_channel *,
                        struct qeth_cmd_buffer *);
static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
static void qeth_free_buffer_pool(struct qeth_card *);
static int qeth_qdio_establish(struct qeth_card *);
static void qeth_free_qdio_buffers(struct qeth_card *);
static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
                struct qeth_qdio_out_buffer *buf,
                enum iucv_tx_notify notification);
static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
                struct qeth_qdio_out_buffer *buf,
                enum qeth_qdio_buffer_states newbufstate);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);

struct workqueue_struct *qeth_wq;
EXPORT_SYMBOL_GPL(qeth_wq);

int qeth_card_hw_is_reachable(struct qeth_card *card)
{
        return (card->state == CARD_STATE_SOFTSETUP) ||
                (card->state == CARD_STATE_UP);
}
EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);

static void qeth_close_dev_handler(struct work_struct *work)
{
        struct qeth_card *card;

        card = container_of(work, struct qeth_card, close_dev_work);
        QETH_CARD_TEXT(card, 2, "cldevhdl");
        rtnl_lock();
        dev_close(card->dev);
        rtnl_unlock();
        ccwgroup_set_offline(card->gdev);
}

void qeth_close_dev(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "cldevsubm");
        queue_work(qeth_wq, &card->close_dev_work);
}
EXPORT_SYMBOL_GPL(qeth_close_dev);

static const char *qeth_get_cardname(struct qeth_card *card)
{
        if (card->info.guestlan) {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return " Virtual NIC QDIO";
                case QETH_CARD_TYPE_IQD:
                        return " Virtual NIC Hiper";
                case QETH_CARD_TYPE_OSM:
                        return " Virtual NIC QDIO - OSM";
                case QETH_CARD_TYPE_OSX:
                        return " Virtual NIC QDIO - OSX";
                default:
                        return " unknown";
                }
        } else {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return " OSD Express";
                case QETH_CARD_TYPE_IQD:
                        return " HiperSockets";
                case QETH_CARD_TYPE_OSN:
                        return " OSN QDIO";
                case QETH_CARD_TYPE_OSM:
                        return " OSM QDIO";
                case QETH_CARD_TYPE_OSX:
                        return " OSX QDIO";
                default:
                        return " unknown";
                }
        }
        return " n/a";
}

/* max length to be returned: 14 */
const char *qeth_get_cardname_short(struct qeth_card *card)
{
        if (card->info.guestlan) {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return "Virt.NIC QDIO";
                case QETH_CARD_TYPE_IQD:
                        return "Virt.NIC Hiper";
                case QETH_CARD_TYPE_OSM:
                        return "Virt.NIC OSM";
                case QETH_CARD_TYPE_OSX:
                        return "Virt.NIC OSX";
                default:
                        return "unknown";
                }
        } else {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        switch (card->info.link_type) {
                        case QETH_LINK_TYPE_FAST_ETH:
                                return "OSD_100";
                        case QETH_LINK_TYPE_HSTR:
                                return "HSTR";
                        case QETH_LINK_TYPE_GBIT_ETH:
                                return "OSD_1000";
                        case QETH_LINK_TYPE_10GBIT_ETH:
                                return "OSD_10GIG";
                        case QETH_LINK_TYPE_LANE_ETH100:
                                return "OSD_FE_LANE";
                        case QETH_LINK_TYPE_LANE_TR:
                                return "OSD_TR_LANE";
                        case QETH_LINK_TYPE_LANE_ETH1000:
                                return "OSD_GbE_LANE";
                        case QETH_LINK_TYPE_LANE:
                                return "OSD_ATM_LANE";
                        default:
                                return "OSD_Express";
                        }
                case QETH_CARD_TYPE_IQD:
                        return "HiperSockets";
                case QETH_CARD_TYPE_OSN:
                        return "OSN";
                case QETH_CARD_TYPE_OSM:
                        return "OSM_1000";
                case QETH_CARD_TYPE_OSX:
                        return "OSX_10GIG";
                default:
                        return "unknown";
                }
        }
        return "n/a";
}

void qeth_set_recovery_task(struct qeth_card *card)
{
        card->recovery_task = current;
}
EXPORT_SYMBOL_GPL(qeth_set_recovery_task);

void qeth_clear_recovery_task(struct qeth_card *card)
{
        card->recovery_task = NULL;
}
EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);

static bool qeth_is_recovery_task(const struct qeth_card *card)
{
        return card->recovery_task == current;
}

void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
                         int clear_start_mask)
{
        unsigned long flags;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        card->thread_allowed_mask = threads;
        if (clear_start_mask)
                card->thread_start_mask &= threads;
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        wake_up(&card->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);

int qeth_threads_running(struct qeth_card *card, unsigned long threads)
{
        unsigned long flags;
        int rc = 0;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        rc = (card->thread_running_mask & threads);
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_threads_running);

int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
{
        if (qeth_is_recovery_task(card))
                return 0;
        return wait_event_interruptible(card->wait_q,
                        qeth_threads_running(card, threads) == 0);
}
EXPORT_SYMBOL_GPL(qeth_wait_for_threads);

void qeth_clear_working_pool_list(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *pool_entry, *tmp;

        QETH_CARD_TEXT(card, 5, "clwrklst");
        list_for_each_entry_safe(pool_entry, tmp,
                            &card->qdio.in_buf_pool.entry_list, list){
                        list_del(&pool_entry->list);
        }
}
EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);

static int qeth_alloc_buffer_pool(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *pool_entry;
        void *ptr;
        int i, j;

        QETH_CARD_TEXT(card, 5, "alocpool");
        for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
                pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
                if (!pool_entry) {
                        qeth_free_buffer_pool(card);
                        return -ENOMEM;
                }
                for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
                        ptr = (void *) __get_free_page(GFP_KERNEL);
                        if (!ptr) {
                                while (j > 0)
                                        free_page((unsigned long)
                                                  pool_entry->elements[--j]);
                                kfree(pool_entry);
                                qeth_free_buffer_pool(card);
                                return -ENOMEM;
                        }
                        pool_entry->elements[j] = ptr;
                }
                list_add(&pool_entry->init_list,
                         &card->qdio.init_pool.entry_list);
        }
        return 0;
}

int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
{
        QETH_CARD_TEXT(card, 2, "realcbp");

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

        /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
        qeth_clear_working_pool_list(card);
        qeth_free_buffer_pool(card);
        card->qdio.in_buf_pool.buf_count = bufcnt;
        card->qdio.init_pool.buf_count = bufcnt;
        return qeth_alloc_buffer_pool(card);
}
EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);

static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
{
        if (!q)
                return;

        qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
        kfree(q);
}

static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
{
        struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
        int i;

        if (!q)
                return NULL;

        if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
                kfree(q);
                return NULL;
        }

        for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
                q->bufs[i].buffer = q->qdio_bufs[i];

        QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
        return q;
}

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

        if (card->options.cq == QETH_CQ_ENABLED) {
                QETH_DBF_TEXT(SETUP, 2, "cqinit");
                qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
                                   QDIO_MAX_BUFFERS_PER_Q);
                card->qdio.c_q->next_buf_to_init = 127;
                rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
                             card->qdio.no_in_queues - 1, 0,
                             127);
                if (rc) {
                        QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
                        goto out;
                }
        }
        rc = 0;
out:
        return rc;
}

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

        if (card->options.cq == QETH_CQ_ENABLED) {
                int i;
                struct qdio_outbuf_state *outbuf_states;

                QETH_DBF_TEXT(SETUP, 2, "cqon");
                card->qdio.c_q = qeth_alloc_qdio_queue();
                if (!card->qdio.c_q) {
                        rc = -1;
                        goto kmsg_out;
                }
                card->qdio.no_in_queues = 2;
                card->qdio.out_bufstates =
                        kzalloc(card->qdio.no_out_queues *
                                QDIO_MAX_BUFFERS_PER_Q *
                                sizeof(struct qdio_outbuf_state), GFP_KERNEL);
                outbuf_states = card->qdio.out_bufstates;
                if (outbuf_states == NULL) {
                        rc = -1;
                        goto free_cq_out;
                }
                for (i = 0; i < card->qdio.no_out_queues; ++i) {
                        card->qdio.out_qs[i]->bufstates = outbuf_states;
                        outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
                }
        } else {
                QETH_DBF_TEXT(SETUP, 2, "nocq");
                card->qdio.c_q = NULL;
                card->qdio.no_in_queues = 1;
        }
        QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
        rc = 0;
out:
        return rc;
free_cq_out:
        qeth_free_qdio_queue(card->qdio.c_q);
        card->qdio.c_q = NULL;
kmsg_out:
        dev_err(&card->gdev->dev, "Failed to create completion queue\n");
        goto out;
}

static void qeth_free_cq(struct qeth_card *card)
{
        if (card->qdio.c_q) {
                --card->qdio.no_in_queues;
                qeth_free_qdio_queue(card->qdio.c_q);
                card->qdio.c_q = NULL;
        }
        kfree(card->qdio.out_bufstates);
        card->qdio.out_bufstates = NULL;
}

static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
                                                        int delayed)
{
        enum iucv_tx_notify n;

        switch (sbalf15) {
        case 0:
                n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
                break;
        case 4:
        case 16:
        case 17:
        case 18:
                n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
                        TX_NOTIFY_UNREACHABLE;
                break;
        default:
                n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
                        TX_NOTIFY_GENERALERROR;
                break;
        }

        return n;
}

static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
                                         int forced_cleanup)
{
        if (q->card->options.cq != QETH_CQ_ENABLED)
                return;

        if (q->bufs[bidx]->next_pending != NULL) {
                struct qeth_qdio_out_buffer *head = q->bufs[bidx];
                struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;

                while (c) {
                        if (forced_cleanup ||
                            atomic_read(&c->state) ==
                              QETH_QDIO_BUF_HANDLED_DELAYED) {
                                struct qeth_qdio_out_buffer *f = c;
                                QETH_CARD_TEXT(f->q->card, 5, "fp");
                                QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
                                /* release here to avoid interleaving between
                                   outbound tasklet and inbound tasklet
                                   regarding notifications and lifecycle */
                                qeth_release_skbs(c);

                                c = f->next_pending;
                                WARN_ON_ONCE(head->next_pending != f);
                                head->next_pending = c;
                                kmem_cache_free(qeth_qdio_outbuf_cache, f);
                        } else {
                                head = c;
                                c = c->next_pending;
                        }

                }
        }
        if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
                                        QETH_QDIO_BUF_HANDLED_DELAYED)) {
                /* for recovery situations */
                q->bufs[bidx]->aob = q->bufstates[bidx].aob;
                qeth_init_qdio_out_buf(q, bidx);
                QETH_CARD_TEXT(q->card, 2, "clprecov");
        }
}


static void qeth_qdio_handle_aob(struct qeth_card *card,
                                 unsigned long phys_aob_addr)
{
        struct qaob *aob;
        struct qeth_qdio_out_buffer *buffer;
        enum iucv_tx_notify notification;

        aob = (struct qaob *) phys_to_virt(phys_aob_addr);
        QETH_CARD_TEXT(card, 5, "haob");
        QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
        buffer = (struct qeth_qdio_out_buffer *) aob->user1;
        QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);

        if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
                           QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
                notification = TX_NOTIFY_OK;
        } else {
                WARN_ON_ONCE(atomic_read(&buffer->state) !=
                                                        QETH_QDIO_BUF_PENDING);
                atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
                notification = TX_NOTIFY_DELAYED_OK;
        }

        if (aob->aorc != 0)  {
                QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
                notification = qeth_compute_cq_notification(aob->aorc, 1);
        }
        qeth_notify_skbs(buffer->q, buffer, notification);

        buffer->aob = NULL;
        qeth_clear_output_buffer(buffer->q, buffer,
                                 QETH_QDIO_BUF_HANDLED_DELAYED);

        /* from here on: do not touch buffer anymore */
        qdio_release_aob(aob);
}

static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
{
        return card->options.cq == QETH_CQ_ENABLED &&
            card->qdio.c_q != NULL &&
            queue != 0 &&
            queue == card->qdio.no_in_queues - 1;
}

static int __qeth_issue_next_read(struct qeth_card *card)
{
        int rc;
        struct qeth_cmd_buffer *iob;

        QETH_CARD_TEXT(card, 5, "issnxrd");
        if (card->read.state != CH_STATE_UP)
                return -EIO;
        iob = qeth_get_buffer(&card->read);
        if (!iob) {
                dev_warn(&card->gdev->dev, "The qeth device driver "
                        "failed to recover an error on the device\n");
                QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
                        "available\n", dev_name(&card->gdev->dev));
                return -ENOMEM;
        }
        qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
        QETH_CARD_TEXT(card, 6, "noirqpnd");
        rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
                              (addr_t) iob, 0, 0);
        if (rc) {
                QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
                        "rc=%i\n", dev_name(&card->gdev->dev), rc);
                atomic_set(&card->read.irq_pending, 0);
                card->read_or_write_problem = 1;
                qeth_schedule_recovery(card);
                wake_up(&card->wait_q);
        }
        return rc;
}

static int qeth_issue_next_read(struct qeth_card *card)
{
        int ret;

        spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
        ret = __qeth_issue_next_read(card);
        spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));

        return ret;
}

static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
{
        struct qeth_reply *reply;

        reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
        if (reply) {
                refcount_set(&reply->refcnt, 1);
                atomic_set(&reply->received, 0);
                reply->card = card;
        }
        return reply;
}

static void qeth_get_reply(struct qeth_reply *reply)
{
        refcount_inc(&reply->refcnt);
}

static void qeth_put_reply(struct qeth_reply *reply)
{
        if (refcount_dec_and_test(&reply->refcnt))
                kfree(reply);
}

static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
                struct qeth_card *card)
{
        char *ipa_name;
        int com = cmd->hdr.command;
        ipa_name = qeth_get_ipa_cmd_name(com);
        if (rc)
                QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
                                "x%X \"%s\"\n",
                                ipa_name, com, dev_name(&card->gdev->dev),
                                QETH_CARD_IFNAME(card), rc,
                                qeth_get_ipa_msg(rc));
        else
                QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
                                ipa_name, com, dev_name(&card->gdev->dev),
                                QETH_CARD_IFNAME(card));
}

static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
                struct qeth_cmd_buffer *iob)
{
        struct qeth_ipa_cmd *cmd = NULL;

        QETH_CARD_TEXT(card, 5, "chkipad");
        if (IS_IPA(iob->data)) {
                cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
                if (IS_IPA_REPLY(cmd)) {
                        if (cmd->hdr.command != IPA_CMD_SETCCID &&
                            cmd->hdr.command != IPA_CMD_DELCCID &&
                            cmd->hdr.command != IPA_CMD_MODCCID &&
                            cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
                                qeth_issue_ipa_msg(cmd,
                                                cmd->hdr.return_code, card);
                        return cmd;
                } else {
                        switch (cmd->hdr.command) {
                        case IPA_CMD_STOPLAN:
                                if (cmd->hdr.return_code ==
                                                IPA_RC_VEPA_TO_VEB_TRANSITION) {
                                        dev_err(&card->gdev->dev,
                                           "Interface %s is down because the "
                                           "adjacent port is no longer in "
                                           "reflective relay mode\n",
                                           QETH_CARD_IFNAME(card));
                                        qeth_close_dev(card);
                                } else {
                                        dev_warn(&card->gdev->dev,
                                           "The link for interface %s on CHPID"
                                           " 0x%X failed\n",
                                           QETH_CARD_IFNAME(card),
                                           card->info.chpid);
                                        qeth_issue_ipa_msg(cmd,
                                                cmd->hdr.return_code, card);
                                }
                                card->lan_online = 0;
                                if (card->dev && netif_carrier_ok(card->dev))
                                        netif_carrier_off(card->dev);
                                return NULL;
                        case IPA_CMD_STARTLAN:
                                dev_info(&card->gdev->dev,
                                           "The link for %s on CHPID 0x%X has"
                                           " been restored\n",
                                           QETH_CARD_IFNAME(card),
                                           card->info.chpid);
                                netif_carrier_on(card->dev);
                                card->lan_online = 1;
                                if (card->info.hwtrap)
                                        card->info.hwtrap = 2;
                                qeth_schedule_recovery(card);
                                return NULL;
                        case IPA_CMD_SETBRIDGEPORT_IQD:
                        case IPA_CMD_SETBRIDGEPORT_OSA:
                        case IPA_CMD_ADDRESS_CHANGE_NOTIF:
                                if (card->discipline->control_event_handler
                                                                (card, cmd))
                                        return cmd;
                                else
                                        return NULL;
                        case IPA_CMD_MODCCID:
                                return cmd;
                        case IPA_CMD_REGISTER_LOCAL_ADDR:
                                QETH_CARD_TEXT(card, 3, "irla");
                                break;
                        case IPA_CMD_UNREGISTER_LOCAL_ADDR:
                                QETH_CARD_TEXT(card, 3, "urla");
                                break;
                        default:
                                QETH_DBF_MESSAGE(2, "Received data is IPA "
                                           "but not a reply!\n");
                                break;
                        }
                }
        }
        return cmd;
}

void qeth_clear_ipacmd_list(struct qeth_card *card)
{
        struct qeth_reply *reply, *r;
        unsigned long flags;

        QETH_CARD_TEXT(card, 4, "clipalst");

        spin_lock_irqsave(&card->lock, flags);
        list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
                qeth_get_reply(reply);
                reply->rc = -EIO;
                atomic_inc(&reply->received);
                list_del_init(&reply->list);
                wake_up(&reply->wait_q);
                qeth_put_reply(reply);
        }
        spin_unlock_irqrestore(&card->lock, flags);
        atomic_set(&card->write.irq_pending, 0);
}
EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);

static int qeth_check_idx_response(struct qeth_card *card,
        unsigned char *buffer)
{
        if (!buffer)
                return 0;

        QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
        if ((buffer[2] & 0xc0) == 0xc0) {
                QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
                           "with cause code 0x%02x%s\n",
                           buffer[4],
                           ((buffer[4] == 0x22) ?
                            " -- try another portname" : ""));
                QETH_CARD_TEXT(card, 2, "ckidxres");
                QETH_CARD_TEXT(card, 2, " idxterm");
                QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
                if (buffer[4] == 0xf6) {
                        dev_err(&card->gdev->dev,
                        "The qeth device is not configured "
                        "for the OSI layer required by z/VM\n");
                        return -EPERM;
                }
                return -EIO;
        }
        return 0;
}

static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
{
        struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
                dev_get_drvdata(&cdev->dev))->dev);
        return card;
}

static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
                __u32 len)
{
        struct qeth_card *card;

        card = CARD_FROM_CDEV(channel->ccwdev);
        QETH_CARD_TEXT(card, 4, "setupccw");
        if (channel == &card->read)
                memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
        else
                memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
        channel->ccw.count = len;
        channel->ccw.cda = (__u32) __pa(iob);
}

static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
{
        __u8 index;

        QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
        index = channel->io_buf_no;
        do {
                if (channel->iob[index].state == BUF_STATE_FREE) {
                        channel->iob[index].state = BUF_STATE_LOCKED;
                        channel->io_buf_no = (channel->io_buf_no + 1) %
                                QETH_CMD_BUFFER_NO;
                        memset(channel->iob[index].data, 0, QETH_BUFSIZE);
                        return channel->iob + index;
                }
                index = (index + 1) % QETH_CMD_BUFFER_NO;
        } while (index != channel->io_buf_no);

        return NULL;
}

void qeth_release_buffer(struct qeth_channel *channel,
                struct qeth_cmd_buffer *iob)
{
        unsigned long flags;

        QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
        spin_lock_irqsave(&channel->iob_lock, flags);
        memset(iob->data, 0, QETH_BUFSIZE);
        iob->state = BUF_STATE_FREE;
        iob->callback = qeth_send_control_data_cb;
        iob->rc = 0;
        spin_unlock_irqrestore(&channel->iob_lock, flags);
        wake_up(&channel->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_release_buffer);

static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
{
        struct qeth_cmd_buffer *buffer = NULL;
        unsigned long flags;

        spin_lock_irqsave(&channel->iob_lock, flags);
        buffer = __qeth_get_buffer(channel);
        spin_unlock_irqrestore(&channel->iob_lock, flags);
        return buffer;
}

struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
{
        struct qeth_cmd_buffer *buffer;
        wait_event(channel->wait_q,
                   ((buffer = qeth_get_buffer(channel)) != NULL));
        return buffer;
}
EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);

void qeth_clear_cmd_buffers(struct qeth_channel *channel)
{
        int cnt;

        for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
                qeth_release_buffer(channel, &channel->iob[cnt]);
        channel->buf_no = 0;
        channel->io_buf_no = 0;
}
EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);

static void qeth_send_control_data_cb(struct qeth_channel *channel,
                  struct qeth_cmd_buffer *iob)
{
        struct qeth_card *card;
        struct qeth_reply *reply, *r;
        struct qeth_ipa_cmd *cmd;
        unsigned long flags;
        int keep_reply;
        int rc = 0;

        card = CARD_FROM_CDEV(channel->ccwdev);
        QETH_CARD_TEXT(card, 4, "sndctlcb");
        rc = qeth_check_idx_response(card, iob->data);
        switch (rc) {
        case 0:
                break;
        case -EIO:
                qeth_clear_ipacmd_list(card);
                qeth_schedule_recovery(card);
                /* fall through */
        default:
                goto out;
        }

        cmd = qeth_check_ipa_data(card, iob);
        if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
                goto out;
        /*in case of OSN : check if cmd is set */
        if (card->info.type == QETH_CARD_TYPE_OSN &&
            cmd &&
            cmd->hdr.command != IPA_CMD_STARTLAN &&
            card->osn_info.assist_cb != NULL) {
                card->osn_info.assist_cb(card->dev, cmd);
                goto out;
        }

        spin_lock_irqsave(&card->lock, flags);
        list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
                if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
                    ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
                        qeth_get_reply(reply);
                        list_del_init(&reply->list);
                        spin_unlock_irqrestore(&card->lock, flags);
                        keep_reply = 0;
                        if (reply->callback != NULL) {
                                if (cmd) {
                                        reply->offset = (__u16)((char *)cmd -
                                                        (char *)iob->data);
                                        keep_reply = reply->callback(card,
                                                        reply,
                                                        (unsigned long)cmd);
                                } else
                                        keep_reply = reply->callback(card,
                                                        reply,
                                                        (unsigned long)iob);
                        }
                        if (cmd)
                                reply->rc = (u16) cmd->hdr.return_code;
                        else if (iob->rc)
                                reply->rc = iob->rc;
                        if (keep_reply) {
                                spin_lock_irqsave(&card->lock, flags);
                                list_add_tail(&reply->list,
                                              &card->cmd_waiter_list);
                                spin_unlock_irqrestore(&card->lock, flags);
                        } else {
                                atomic_inc(&reply->received);
                                wake_up(&reply->wait_q);
                        }
                        qeth_put_reply(reply);
                        goto out;
                }
        }
        spin_unlock_irqrestore(&card->lock, flags);
out:
        memcpy(&card->seqno.pdu_hdr_ack,
                QETH_PDU_HEADER_SEQ_NO(iob->data),
                QETH_SEQ_NO_LENGTH);
        qeth_release_buffer(channel, iob);
}

static int qeth_setup_channel(struct qeth_channel *channel)
{
        int cnt;

        QETH_DBF_TEXT(SETUP, 2, "setupch");
        for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
                channel->iob[cnt].data =
                        kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
                if (channel->iob[cnt].data == NULL)
                        break;
                channel->iob[cnt].state = BUF_STATE_FREE;
                channel->iob[cnt].channel = channel;
                channel->iob[cnt].callback = qeth_send_control_data_cb;
                channel->iob[cnt].rc = 0;
        }
        if (cnt < QETH_CMD_BUFFER_NO) {
                while (cnt-- > 0)
                        kfree(channel->iob[cnt].data);
                return -ENOMEM;
        }
        channel->buf_no = 0;
        channel->io_buf_no = 0;
        atomic_set(&channel->irq_pending, 0);
        spin_lock_init(&channel->iob_lock);

        init_waitqueue_head(&channel->wait_q);
        return 0;
}

static int qeth_set_thread_start_bit(struct qeth_card *card,
                unsigned long thread)
{
        unsigned long flags;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        if (!(card->thread_allowed_mask & thread) ||
              (card->thread_start_mask & thread)) {
                spin_unlock_irqrestore(&card->thread_mask_lock, flags);
                return -EPERM;
        }
        card->thread_start_mask |= thread;
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        return 0;
}

void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
{
        unsigned long flags;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        card->thread_start_mask &= ~thread;
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        wake_up(&card->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);

void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
{
        unsigned long flags;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        card->thread_running_mask &= ~thread;
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        wake_up_all(&card->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);

static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
{
        unsigned long flags;
        int rc = 0;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        if (card->thread_start_mask & thread) {
                if ((card->thread_allowed_mask & thread) &&
                    !(card->thread_running_mask & thread)) {
                        rc = 1;
                        card->thread_start_mask &= ~thread;
                        card->thread_running_mask |= thread;
                } else
                        rc = -EPERM;
        }
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        return rc;
}

int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
{
        int rc = 0;

        wait_event(card->wait_q,

                   (rc = __qeth_do_run_thread(card, thread)) >= 0);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_run_thread);

void qeth_schedule_recovery(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "startrec");
        if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
                schedule_work(&card->kernel_thread_starter);
}
EXPORT_SYMBOL_GPL(qeth_schedule_recovery);

static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
{
        int dstat, cstat;
        char *sense;
        struct qeth_card *card;

        sense = (char *) irb->ecw;
        cstat = irb->scsw.cmd.cstat;
        dstat = irb->scsw.cmd.dstat;
        card = CARD_FROM_CDEV(cdev);

        if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
                     SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
                     SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
                QETH_CARD_TEXT(card, 2, "CGENCHK");
                dev_warn(&cdev->dev, "The qeth device driver "
                        "failed to recover an error on the device\n");
                QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
                        dev_name(&cdev->dev), dstat, cstat);
                print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
                                16, 1, irb, 64, 1);
                return 1;
        }

        if (dstat & DEV_STAT_UNIT_CHECK) {
                if (sense[SENSE_RESETTING_EVENT_BYTE] &
                    SENSE_RESETTING_EVENT_FLAG) {
                        QETH_CARD_TEXT(card, 2, "REVIND");
                        return 1;
                }
                if (sense[SENSE_COMMAND_REJECT_BYTE] &
                    SENSE_COMMAND_REJECT_FLAG) {
                        QETH_CARD_TEXT(card, 2, "CMDREJi");
                        return 1;
                }
                if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
                        QETH_CARD_TEXT(card, 2, "AFFE");
                        return 1;
                }
                if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
                        QETH_CARD_TEXT(card, 2, "ZEROSEN");
                        return 0;
                }
                QETH_CARD_TEXT(card, 2, "DGENCHK");
                        return 1;
        }
        return 0;
}

static long __qeth_check_irb_error(struct ccw_device *cdev,
                unsigned long intparm, struct irb *irb)
{
        struct qeth_card *card;

        card = CARD_FROM_CDEV(cdev);

        if (!card || !IS_ERR(irb))
                return 0;

        switch (PTR_ERR(irb)) {
        case -EIO:
                QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
                        dev_name(&cdev->dev));
                QETH_CARD_TEXT(card, 2, "ckirberr");
                QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
                break;
        case -ETIMEDOUT:
                dev_warn(&cdev->dev, "A hardware operation timed out"
                        " on the device\n");
                QETH_CARD_TEXT(card, 2, "ckirberr");
                QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
                if (intparm == QETH_RCD_PARM) {
                        if (card->data.ccwdev == cdev) {
                                card->data.state = CH_STATE_DOWN;
                                wake_up(&card->wait_q);
                        }
                }
                break;
        default:
                QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
                        dev_name(&cdev->dev), PTR_ERR(irb));
                QETH_CARD_TEXT(card, 2, "ckirberr");
                QETH_CARD_TEXT(card, 2, "  rc???");
        }
        return PTR_ERR(irb);
}

static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
                struct irb *irb)
{
        int rc;
        int cstat, dstat;
        struct qeth_cmd_buffer *buffer;
        struct qeth_channel *channel;
        struct qeth_card *card;
        struct qeth_cmd_buffer *iob;
        __u8 index;

        if (__qeth_check_irb_error(cdev, intparm, irb))
                return;
        cstat = irb->scsw.cmd.cstat;
        dstat = irb->scsw.cmd.dstat;

        card = CARD_FROM_CDEV(cdev);
        if (!card)
                return;

        QETH_CARD_TEXT(card, 5, "irq");

        if (card->read.ccwdev == cdev) {
                channel = &card->read;
                QETH_CARD_TEXT(card, 5, "read");
        } else if (card->write.ccwdev == cdev) {
                channel = &card->write;
                QETH_CARD_TEXT(card, 5, "write");
        } else {
                channel = &card->data;
                QETH_CARD_TEXT(card, 5, "data");
        }
        atomic_set(&channel->irq_pending, 0);

        if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
                channel->state = CH_STATE_STOPPED;

        if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
                channel->state = CH_STATE_HALTED;

        /*let's wake up immediately on data channel*/
        if ((channel == &card->data) && (intparm != 0) &&
            (intparm != QETH_RCD_PARM))
                goto out;

        if (intparm == QETH_CLEAR_CHANNEL_PARM) {
                QETH_CARD_TEXT(card, 6, "clrchpar");
                /* we don't have to handle this further */
                intparm = 0;
        }
        if (intparm == QETH_HALT_CHANNEL_PARM) {
                QETH_CARD_TEXT(card, 6, "hltchpar");
                /* we don't have to handle this further */
                intparm = 0;
        }
        if ((dstat & DEV_STAT_UNIT_EXCEP) ||
            (dstat & DEV_STAT_UNIT_CHECK) ||
            (cstat)) {
                if (irb->esw.esw0.erw.cons) {
                        dev_warn(&channel->ccwdev->dev,
                                "The qeth device driver failed to recover "
                                "an error on the device\n");
                        QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
                                "0x%X dstat 0x%X\n",
                                dev_name(&channel->ccwdev->dev), cstat, dstat);
                        print_hex_dump(KERN_WARNING, "qeth: irb ",
                                DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
                        print_hex_dump(KERN_WARNING, "qeth: sense data ",
                                DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
                }
                if (intparm == QETH_RCD_PARM) {
                        channel->state = CH_STATE_DOWN;
                        goto out;
                }
                rc = qeth_get_problem(cdev, irb);
                if (rc) {
                        card->read_or_write_problem = 1;
                        qeth_clear_ipacmd_list(card);
                        qeth_schedule_recovery(card);
                        goto out;
                }
        }

        if (intparm == QETH_RCD_PARM) {
                channel->state = CH_STATE_RCD_DONE;
                goto out;
        }
        if (intparm) {
                buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
                buffer->state = BUF_STATE_PROCESSED;
        }
        if (channel == &card->data)
                return;
        if (channel == &card->read &&
            channel->state == CH_STATE_UP)
                __qeth_issue_next_read(card);

        iob = channel->iob;
        index = channel->buf_no;
        while (iob[index].state == BUF_STATE_PROCESSED) {
                if (iob[index].callback != NULL)
                        iob[index].callback(channel, iob + index);

                index = (index + 1) % QETH_CMD_BUFFER_NO;
        }
        channel->buf_no = index;
out:
        wake_up(&card->wait_q);
        return;
}

static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
                struct qeth_qdio_out_buffer *buf,
                enum iucv_tx_notify notification)
{
        struct sk_buff *skb;

        if (skb_queue_empty(&buf->skb_list))
                goto out;
        skb = skb_peek(&buf->skb_list);
        while (skb) {
                QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
                QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
                if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
                        if (skb->sk) {
                                struct iucv_sock *iucv = iucv_sk(skb->sk);
                                iucv->sk_txnotify(skb, notification);
                        }
                }
                if (skb_queue_is_last(&buf->skb_list, skb))
                        skb = NULL;
                else
                        skb = skb_queue_next(&buf->skb_list, skb);
        }
out:
        return;
}

static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
{
        struct sk_buff *skb;
        struct iucv_sock *iucv;
        int notify_general_error = 0;

        if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
                notify_general_error = 1;

        /* release may never happen from within CQ tasklet scope */
        WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);

        skb = skb_dequeue(&buf->skb_list);
        while (skb) {
                QETH_CARD_TEXT(buf->q->card, 5, "skbr");
                QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
                if (notify_general_error &&
                    be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
                        if (skb->sk) {
                                iucv = iucv_sk(skb->sk);
                                iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
                        }
                }
                refcount_dec(&skb->users);
                dev_kfree_skb_any(skb);
                skb = skb_dequeue(&buf->skb_list);
        }
}

static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
                struct qeth_qdio_out_buffer *buf,
                enum qeth_qdio_buffer_states newbufstate)
{
        int i;

        /* is PCI flag set on buffer? */
        if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
                atomic_dec(&queue->set_pci_flags_count);

        if (newbufstate == QETH_QDIO_BUF_EMPTY) {
                qeth_release_skbs(buf);
        }
        for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
                if (buf->buffer->element[i].addr && buf->is_header[i])
                        kmem_cache_free(qeth_core_header_cache,
                                buf->buffer->element[i].addr);
                buf->is_header[i] = 0;
                buf->buffer->element[i].length = 0;
                buf->buffer->element[i].addr = NULL;
                buf->buffer->element[i].eflags = 0;
                buf->buffer->element[i].sflags = 0;
        }
        buf->buffer->element[15].eflags = 0;
        buf->buffer->element[15].sflags = 0;
        buf->next_element_to_fill = 0;
        atomic_set(&buf->state, newbufstate);
}

static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
{
        int j;

        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                if (!q->bufs[j])
                        continue;
                qeth_cleanup_handled_pending(q, j, 1);
                qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
                if (free) {
                        kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
                        q->bufs[j] = NULL;
                }
        }
}

void qeth_clear_qdio_buffers(struct qeth_card *card)
{
        int i;

        QETH_CARD_TEXT(card, 2, "clearqdbf");
        /* clear outbound buffers to free skbs */
        for (i = 0; i < card->qdio.no_out_queues; ++i) {
                if (card->qdio.out_qs[i]) {
                        qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
                }
        }
}
EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);

static void qeth_free_buffer_pool(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *pool_entry, *tmp;
        int i = 0;
        list_for_each_entry_safe(pool_entry, tmp,
                                 &card->qdio.init_pool.entry_list, init_list){
                for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
                        free_page((unsigned long)pool_entry->elements[i]);
                list_del(&pool_entry->init_list);
                kfree(pool_entry);
        }
}

static void qeth_clean_channel(struct qeth_channel *channel)
{
        int cnt;

        QETH_DBF_TEXT(SETUP, 2, "freech");
        for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
                kfree(channel->iob[cnt].data);
}

static void qeth_set_single_write_queues(struct qeth_card *card)
{
        if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
            (card->qdio.no_out_queues == 4))
                qeth_free_qdio_buffers(card);

        card->qdio.no_out_queues = 1;
        if (card->qdio.default_out_queue != 0)
                dev_info(&card->gdev->dev, "Priority Queueing not supported\n");

        card->qdio.default_out_queue = 0;
}

static void qeth_set_multiple_write_queues(struct qeth_card *card)
{
        if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
            (card->qdio.no_out_queues == 1)) {
                qeth_free_qdio_buffers(card);
                card->qdio.default_out_queue = 2;
        }
        card->qdio.no_out_queues = 4;
}

static void qeth_update_from_chp_desc(struct qeth_card *card)
{
        struct ccw_device *ccwdev;
        struct channel_path_desc *chp_dsc;

        QETH_DBF_TEXT(SETUP, 2, "chp_desc");

        ccwdev = card->data.ccwdev;
        chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
        if (!chp_dsc)
                goto out;

        card->info.func_level = 0x4100 + chp_dsc->desc;
        if (card->info.type == QETH_CARD_TYPE_IQD)
                goto out;

        /* CHPP field bit 6 == 1 -> single queue */
        if ((chp_dsc->chpp & 0x02) == 0x02)
                qeth_set_single_write_queues(card);
        else
                qeth_set_multiple_write_queues(card);
out:
        kfree(chp_dsc);
        QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
        QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
}

static void qeth_init_qdio_info(struct qeth_card *card)
{
        QETH_DBF_TEXT(SETUP, 4, "intqdinf");
        atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
        /* inbound */
        card->qdio.no_in_queues = 1;
        card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
        if (card->info.type == QETH_CARD_TYPE_IQD)
                card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
        else
                card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
        card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
        INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
        INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
}

static void qeth_set_intial_options(struct qeth_card *card)
{
        card->options.route4.type = NO_ROUTER;
        card->options.route6.type = NO_ROUTER;
        card->options.fake_broadcast = 0;
        card->options.performance_stats = 0;
        card->options.rx_sg_cb = QETH_RX_SG_CB;
        card->options.isolation = ISOLATION_MODE_NONE;
        card->options.cq = QETH_CQ_DISABLED;
}

static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
{
        unsigned long flags;
        int rc = 0;

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
                        (u8) card->thread_start_mask,
                        (u8) card->thread_allowed_mask,
                        (u8) card->thread_running_mask);
        rc = (card->thread_start_mask & thread);
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);
        return rc;
}

static void qeth_start_kernel_thread(struct work_struct *work)
{
        struct task_struct *ts;
        struct qeth_card *card = container_of(work, struct qeth_card,
                                        kernel_thread_starter);
        QETH_CARD_TEXT(card , 2, "strthrd");

        if (card->read.state != CH_STATE_UP &&
            card->write.state != CH_STATE_UP)
                return;
        if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
                ts = kthread_run(card->discipline->recover, (void *)card,
                                "qeth_recover");
                if (IS_ERR(ts)) {
                        qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
                        qeth_clear_thread_running_bit(card,
                                QETH_RECOVER_THREAD);
                }
        }
}

static void qeth_buffer_reclaim_work(struct work_struct *);
static int qeth_setup_card(struct qeth_card *card)
{

        QETH_DBF_TEXT(SETUP, 2, "setupcrd");
        QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));

        card->read.state  = CH_STATE_DOWN;
        card->write.state = CH_STATE_DOWN;
        card->data.state  = CH_STATE_DOWN;
        card->state = CARD_STATE_DOWN;
        card->lan_online = 0;
        card->read_or_write_problem = 0;
        card->dev = NULL;
        spin_lock_init(&card->vlanlock);
        spin_lock_init(&card->mclock);
        spin_lock_init(&card->lock);
        spin_lock_init(&card->ip_lock);
        spin_lock_init(&card->thread_mask_lock);
        mutex_init(&card->conf_mutex);
        mutex_init(&card->discipline_mutex);
        card->thread_start_mask = 0;
        card->thread_allowed_mask = 0;
        card->thread_running_mask = 0;
        INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
        INIT_LIST_HEAD(&card->cmd_waiter_list);
        init_waitqueue_head(&card->wait_q);
        /* initial options */
        qeth_set_intial_options(card);
        /* IP address takeover */
        INIT_LIST_HEAD(&card->ipato.entries);
        card->ipato.enabled = false;
        card->ipato.invert4 = false;
        card->ipato.invert6 = false;
        /* init QDIO stuff */
        qeth_init_qdio_info(card);
        INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
        INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
        return 0;
}

static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
{
        struct qeth_card *card = container_of(slr, struct qeth_card,
                                        qeth_service_level);
        if (card->info.mcl_level[0])
                seq_printf(m, "qeth: %s firmware level %s\n",
                        CARD_BUS_ID(card), card->info.mcl_level);
}

static struct qeth_card *qeth_alloc_card(void)
{
        struct qeth_card *card;

        QETH_DBF_TEXT(SETUP, 2, "alloccrd");
        card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
        if (!card)
                goto out;
        QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
        if (qeth_setup_channel(&card->read))
                goto out_ip;
        if (qeth_setup_channel(&card->write))
                goto out_channel;
        card->options.layer2 = -1;
        card->qeth_service_level.seq_print = qeth_core_sl_print;
        register_service_level(&card->qeth_service_level);
        return card;

out_channel:
        qeth_clean_channel(&card->read);
out_ip:
        kfree(card);
out:
        return NULL;
}

static void qeth_determine_card_type(struct qeth_card *card)
{
        QETH_DBF_TEXT(SETUP, 2, "detcdtyp");

        card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
        card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
        card->info.type = CARD_RDEV(card)->id.driver_info;
        card->qdio.no_out_queues = QETH_MAX_QUEUES;
        if (card->info.type == QETH_CARD_TYPE_IQD)
                card->info.is_multicast_different = 0x0103;
        qeth_update_from_chp_desc(card);
}

static int qeth_clear_channel(struct qeth_channel *channel)
{
        unsigned long flags;
        struct qeth_card *card;
        int rc;

        card = CARD_FROM_CDEV(channel->ccwdev);
        QETH_CARD_TEXT(card, 3, "clearch");
        spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
        rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
        spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);

        if (rc)
                return rc;
        rc = wait_event_interruptible_timeout(card->wait_q,
                        channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
        if (rc == -ERESTARTSYS)
                return rc;
        if (channel->state != CH_STATE_STOPPED)
                return -ETIME;
        channel->state = CH_STATE_DOWN;
        return 0;
}

static int qeth_halt_channel(struct qeth_channel *channel)
{
        unsigned long flags;
        struct qeth_card *card;
        int rc;

        card = CARD_FROM_CDEV(channel->ccwdev);
        QETH_CARD_TEXT(card, 3, "haltch");
        spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
        rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
        spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);

        if (rc)
                return rc;
        rc = wait_event_interruptible_timeout(card->wait_q,
                        channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
        if (rc == -ERESTARTSYS)
                return rc;
        if (channel->state != CH_STATE_HALTED)
                return -ETIME;
        return 0;
}

static int qeth_halt_channels(struct qeth_card *card)
{
        int rc1 = 0, rc2 = 0, rc3 = 0;

        QETH_CARD_TEXT(card, 3, "haltchs");
        rc1 = qeth_halt_channel(&card->read);
        rc2 = qeth_halt_channel(&card->write);
        rc3 = qeth_halt_channel(&card->data);
        if (rc1)
                return rc1;
        if (rc2)
                return rc2;
        return rc3;
}

static int qeth_clear_channels(struct qeth_card *card)
{
        int rc1 = 0, rc2 = 0, rc3 = 0;

        QETH_CARD_TEXT(card, 3, "clearchs");
        rc1 = qeth_clear_channel(&card->read);
        rc2 = qeth_clear_channel(&card->write);
        rc3 = qeth_clear_channel(&card->data);
        if (rc1)
                return rc1;
        if (rc2)
                return rc2;
        return rc3;
}

static int qeth_clear_halt_card(struct qeth_card *card, int halt)
{
        int rc = 0;

        QETH_CARD_TEXT(card, 3, "clhacrd");

        if (halt)
                rc = qeth_halt_channels(card);
        if (rc)
                return rc;
        return qeth_clear_channels(card);
}

int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
{
        int rc = 0;

        QETH_CARD_TEXT(card, 3, "qdioclr");
        switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
                QETH_QDIO_CLEANING)) {
        case QETH_QDIO_ESTABLISHED:
                if (card->info.type == QETH_CARD_TYPE_IQD)
                        rc = qdio_shutdown(CARD_DDEV(card),
                                QDIO_FLAG_CLEANUP_USING_HALT);
                else
                        rc = qdio_shutdown(CARD_DDEV(card),
                                QDIO_FLAG_CLEANUP_USING_CLEAR);
                if (rc)
                        QETH_CARD_TEXT_(card, 3, "1err%d", rc);
                atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
                break;
        case QETH_QDIO_CLEANING:
                return rc;
        default:
                break;
        }
        rc = qeth_clear_halt_card(card, use_halt);
        if (rc)
                QETH_CARD_TEXT_(card, 3, "2err%d", rc);
        card->state = CARD_STATE_DOWN;
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);

static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
                               int *length)
{
        struct ciw *ciw;
        char *rcd_buf;
        int ret;
        struct qeth_channel *channel = &card->data;
        unsigned long flags;

        /*
         * scan for RCD command in extended SenseID data
         */
        ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
        if (!ciw || ciw->cmd == 0)
                return -EOPNOTSUPP;
        rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
        if (!rcd_buf)
                return -ENOMEM;

        channel->ccw.cmd_code = ciw->cmd;
        channel->ccw.cda = (__u32) __pa(rcd_buf);
        channel->ccw.count = ciw->count;
        channel->ccw.flags = CCW_FLAG_SLI;
        channel->state = CH_STATE_RCD;
        spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
        ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
                                       QETH_RCD_PARM, LPM_ANYPATH, 0,
                                       QETH_RCD_TIMEOUT);
        spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
        if (!ret)
                wait_event(card->wait_q,
                           (channel->state == CH_STATE_RCD_DONE ||
                            channel->state == CH_STATE_DOWN));
        if (channel->state == CH_STATE_DOWN)
                ret = -EIO;
        else
                channel->state = CH_STATE_DOWN;
        if (ret) {
                kfree(rcd_buf);
                *buffer = NULL;
                *length = 0;
        } else {
                *length = ciw->count;
                *buffer = rcd_buf;
        }
        return ret;
}

static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
{
        QETH_DBF_TEXT(SETUP, 2, "cfgunit");
        card->info.chpid = prcd[30];
        card->info.unit_addr2 = prcd[31];
        card->info.cula = prcd[63];
        card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
                               (prcd[0x11] == _ascebc['M']));
}

static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
{
        enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
        struct diag26c_vnic_resp *response = NULL;
        struct diag26c_vnic_req *request = NULL;
        struct ccw_dev_id id;
        char userid[80];
        int rc = 0;

        QETH_DBF_TEXT(SETUP, 2, "vmlayer");

        cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
        if (rc)
                goto out;

        request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
        response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
        if (!request || !response) {
                rc = -ENOMEM;
                goto out;
        }

        ccw_device_get_id(CARD_RDEV(card), &id);
        request->resp_buf_len = sizeof(*response);
        request->resp_version = DIAG26C_VERSION6_VM65918;
        request->req_format = DIAG26C_VNIC_INFO;
        ASCEBC(userid, 8);
        memcpy(&request->sys_name, userid, 8);
        request->devno = id.devno;

        QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
        rc = diag26c(request, response, DIAG26C_PORT_VNIC);
        QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
        if (rc)
                goto out;
        QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));

        if (request->resp_buf_len < sizeof(*response) ||
            response->version != request->resp_version) {
                rc = -EIO;
                goto out;
        }

        if (response->protocol == VNIC_INFO_PROT_L2)
                disc = QETH_DISCIPLINE_LAYER2;
        else if (response->protocol == VNIC_INFO_PROT_L3)
                disc = QETH_DISCIPLINE_LAYER3;

out:
        kfree(response);
        kfree(request);
        if (rc)
                QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
        return disc;
}

/* Determine whether the device requires a specific layer discipline */
static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
{
        enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;

        if (card->info.type == QETH_CARD_TYPE_OSM ||
            card->info.type == QETH_CARD_TYPE_OSN)
                disc = QETH_DISCIPLINE_LAYER2;
        else if (card->info.guestlan)
                disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
                                QETH_DISCIPLINE_LAYER3 :
                                qeth_vm_detect_layer(card);

        switch (disc) {
        case QETH_DISCIPLINE_LAYER2:
                QETH_DBF_TEXT(SETUP, 3, "force l2");
                break;
        case QETH_DISCIPLINE_LAYER3:
                QETH_DBF_TEXT(SETUP, 3, "force l3");
                break;
        default:
                QETH_DBF_TEXT(SETUP, 3, "force no");
        }

        return disc;
}

static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
{
        QETH_DBF_TEXT(SETUP, 2, "cfgblkt");

        if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
            prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
                card->info.blkt.time_total = 0;
                card->info.blkt.inter_packet = 0;
                card->info.blkt.inter_packet_jumbo = 0;
        } else {
                card->info.blkt.time_total = 250;
                card->info.blkt.inter_packet = 5;
                card->info.blkt.inter_packet_jumbo = 15;
        }
}

static void qeth_init_tokens(struct qeth_card *card)
{
        card->token.issuer_rm_w = 0x00010103UL;
        card->token.cm_filter_w = 0x00010108UL;
        card->token.cm_connection_w = 0x0001010aUL;
        card->token.ulp_filter_w = 0x0001010bUL;
        card->token.ulp_connection_w = 0x0001010dUL;
}

static void qeth_init_func_level(struct qeth_card *card)
{
        switch (card->info.type) {
        case QETH_CARD_TYPE_IQD:
                card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
                break;
        case QETH_CARD_TYPE_OSD:
        case QETH_CARD_TYPE_OSN:
                card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
                break;
        default:
                break;
        }
}

static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
                void (*idx_reply_cb)(struct qeth_channel *,
                        struct qeth_cmd_buffer *))
{
        struct qeth_cmd_buffer *iob;
        unsigned long flags;
        int rc;
        struct qeth_card *card;

        QETH_DBF_TEXT(SETUP, 2, "idxanswr");
        card = CARD_FROM_CDEV(channel->ccwdev);
        iob = qeth_get_buffer(channel);
        if (!iob)
                return -ENOMEM;
        iob->callback = idx_reply_cb;
        memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
        channel->ccw.count = QETH_BUFSIZE;
        channel->ccw.cda = (__u32) __pa(iob->data);

        wait_event(card->wait_q,
                   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
        QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
        spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
        rc = ccw_device_start(channel->ccwdev,
                              &channel->ccw, (addr_t) iob, 0, 0);
        spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);

        if (rc) {
                QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
                QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
                atomic_set(&channel->irq_pending, 0);
                wake_up(&card->wait_q);
                return rc;
        }
        rc = wait_event_interruptible_timeout(card->wait_q,
                         channel->state == CH_STATE_UP, QETH_TIMEOUT);
        if (rc == -ERESTARTSYS)
                return rc;
        if (channel->state != CH_STATE_UP) {
                rc = -ETIME;
                QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
                qeth_clear_cmd_buffers(channel);
        } else
                rc = 0;
        return rc;
}

static int qeth_idx_activate_channel(struct qeth_channel *channel,
                void (*idx_reply_cb)(struct qeth_channel *,
                        struct qeth_cmd_buffer *))
{
        struct qeth_card *card;
        struct qeth_cmd_buffer *iob;
        unsigned long flags;
        __u16 temp;
        __u8 tmp;
        int rc;
        struct ccw_dev_id temp_devid;

        card = CARD_FROM_CDEV(channel->ccwdev);

        QETH_DBF_TEXT(SETUP, 2, "idxactch");

        iob = qeth_get_buffer(channel);
        if (!iob)
                return -ENOMEM;
        iob->callback = idx_reply_cb;
        memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
        channel->ccw.count = IDX_ACTIVATE_SIZE;
        channel->ccw.cda = (__u32) __pa(iob->data);
        if (channel == &card->write) {
                memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
                memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
                       &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
                card->seqno.trans_hdr++;
        } else {
                memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
                memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
                       &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
        }
        tmp = ((__u8)card->info.portno) | 0x80;
        memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
        memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
               &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
               &card->info.func_level, sizeof(__u16));
        ccw_device_get_id(CARD_DDEV(card), &temp_devid);
        memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
        temp = (card->info.cula << 8) + card->info.unit_addr2;
        memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);

        wait_event(card->wait_q,
                   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
        QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
        spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
        rc = ccw_device_start(channel->ccwdev,
                              &channel->ccw, (addr_t) iob, 0, 0);
        spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);

        if (rc) {
                QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
                        rc);
                QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
                atomic_set(&channel->irq_pending, 0);
                wake_up(&card->wait_q);
                return rc;
        }
        rc = wait_event_interruptible_timeout(card->wait_q,
                        channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
        if (rc == -ERESTARTSYS)
                return rc;
        if (channel->state != CH_STATE_ACTIVATING) {
                dev_warn(&channel->ccwdev->dev, "The qeth device driver"
                        " failed to recover an error on the device\n");
                QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
                        dev_name(&channel->ccwdev->dev));
                QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
                qeth_clear_cmd_buffers(channel);
                return -ETIME;
        }
        return qeth_idx_activate_get_answer(channel, idx_reply_cb);
}

static int qeth_peer_func_level(int level)
{
        if ((level & 0xff) == 8)
                return (level & 0xff) + 0x400;
        if (((level >> 8) & 3) == 1)
                return (level & 0xff) + 0x200;
        return level;
}

static void qeth_idx_write_cb(struct qeth_channel *channel,
                struct qeth_cmd_buffer *iob)
{
        struct qeth_card *card;
        __u16 temp;

        QETH_DBF_TEXT(SETUP , 2, "idxwrcb");

        if (channel->state == CH_STATE_DOWN) {
                channel->state = CH_STATE_ACTIVATING;
                goto out;
        }
        card = CARD_FROM_CDEV(channel->ccwdev);

        if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
                if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)

                        dev_err(&card->write.ccwdev->dev,
                                "The adapter is used exclusively by another "
                                "host\n");
                else
                        QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
                                " negative reply\n",
                                dev_name(&card->write.ccwdev->dev));
                goto out;
        }
        memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
        if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
                QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
                        "function level mismatch (sent: 0x%x, received: "
                        "0x%x)\n", dev_name(&card->write.ccwdev->dev),
                        card->info.func_level, temp);
                goto out;
        }
        channel->state = CH_STATE_UP;
out:
        qeth_release_buffer(channel, iob);
}

static void qeth_idx_read_cb(struct qeth_channel *channel,
                struct qeth_cmd_buffer *iob)
{
        struct qeth_card *card;
        __u16 temp;

        QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
        if (channel->state == CH_STATE_DOWN) {
                channel->state = CH_STATE_ACTIVATING;
                goto out;
        }

        card = CARD_FROM_CDEV(channel->ccwdev);
        if (qeth_check_idx_response(card, iob->data))
                        goto out;

        if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
                switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
                case QETH_IDX_ACT_ERR_EXCL:
                        dev_err(&card->write.ccwdev->dev,
                                "The adapter is used exclusively by another "
                                "host\n");
                        break;
                case QETH_IDX_ACT_ERR_AUTH:
                case QETH_IDX_ACT_ERR_AUTH_USER:
                        dev_err(&card->read.ccwdev->dev,
                                "Setting the device online failed because of "
                                "insufficient authorization\n");
                        break;
                default:
                        QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
                                " negative reply\n",
                                dev_name(&card->read.ccwdev->dev));
                }
                QETH_CARD_TEXT_(card, 2, "idxread%c",
                        QETH_IDX_ACT_CAUSE_CODE(iob->data));
                goto out;
        }

        memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
        if (temp != qeth_peer_func_level(card->info.func_level)) {
                QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
                        "level mismatch (sent: 0x%x, received: 0x%x)\n",
                        dev_name(&card->read.ccwdev->dev),
                        card->info.func_level, temp);
                goto out;
        }
        memcpy(&card->token.issuer_rm_r,
               QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
               QETH_MPC_TOKEN_LENGTH);
        memcpy(&card->info.mcl_level[0],
               QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
        channel->state = CH_STATE_UP;
out:
        qeth_release_buffer(channel, iob);
}

void qeth_prepare_control_data(struct qeth_card *card, int len,
                struct qeth_cmd_buffer *iob)
{
        qeth_setup_ccw(&card->write, iob->data, len);
        iob->callback = qeth_release_buffer;

        memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
               &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
        card->seqno.trans_hdr++;
        memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
               &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
        card->seqno.pdu_hdr++;
        memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
               &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
        QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
}
EXPORT_SYMBOL_GPL(qeth_prepare_control_data);

/**
 * qeth_send_control_data() -   send control command to the card
 * @card:                       qeth_card structure pointer
 * @len:                        size of the command buffer
 * @iob:                        qeth_cmd_buffer pointer
 * @reply_cb:                   callback function pointer
 * @cb_card:                    pointer to the qeth_card structure
 * @cb_reply:                   pointer to the qeth_reply structure
 * @cb_cmd:                     pointer to the original iob for non-IPA
 *                              commands, or to the qeth_ipa_cmd structure
 *                              for the IPA commands.
 * @reply_param:                private pointer passed to the callback
 *
 * Returns the value of the `return_code' field of the response
 * block returned from the hardware, or other error indication.
 * Value of zero indicates successful execution of the command.
 *
 * Callback function gets called one or more times, with cb_cmd
 * pointing to the response returned by the hardware. Callback
 * function must return non-zero if more reply blocks are expected,
 * and zero if the last or only reply block is received. Callback
 * function can get the value of the reply_param pointer from the
 * field 'param' of the structure qeth_reply.
 */

int qeth_send_control_data(struct qeth_card *card, int len,
                struct qeth_cmd_buffer *iob,
                int (*reply_cb)(struct qeth_card *cb_card,
                                struct qeth_reply *cb_reply,
                                unsigned long cb_cmd),
                void *reply_param)
{
        int rc;
        unsigned long flags;
        struct qeth_reply *reply = NULL;
        unsigned long timeout, event_timeout;
        struct qeth_ipa_cmd *cmd = NULL;

        QETH_CARD_TEXT(card, 2, "sendctl");

        if (card->read_or_write_problem) {
                qeth_release_buffer(iob->channel, iob);
                return -EIO;
        }
        reply = qeth_alloc_reply(card);
        if (!reply) {
                return -ENOMEM;
        }
        reply->callback = reply_cb;
        reply->param = reply_param;

        init_waitqueue_head(&reply->wait_q);

        while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;

        if (IS_IPA(iob->data)) {
                cmd = __ipa_cmd(iob);
                cmd->hdr.seqno = card->seqno.ipa++;
                reply->seqno = cmd->hdr.seqno;
                event_timeout = QETH_IPA_TIMEOUT;
        } else {
                reply->seqno = QETH_IDX_COMMAND_SEQNO;
                event_timeout = QETH_TIMEOUT;
        }
        qeth_prepare_control_data(card, len, iob);

        spin_lock_irqsave(&card->lock, flags);
        list_add_tail(&reply->list, &card->cmd_waiter_list);
        spin_unlock_irqrestore(&card->lock, flags);

        timeout = jiffies + event_timeout;

        QETH_CARD_TEXT(card, 6, "noirqpnd");
        spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
        rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
                              (addr_t) iob, 0, 0);
        spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
        if (rc) {
                QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
                        "ccw_device_start rc = %i\n",
                        dev_name(&card->write.ccwdev->dev), rc);
                QETH_CARD_TEXT_(card, 2, " err%d", rc);
                spin_lock_irqsave(&card->lock, flags);
                list_del_init(&reply->list);
                qeth_put_reply(reply);
                spin_unlock_irqrestore(&card->lock, flags);
                qeth_release_buffer(iob->channel, iob);
                atomic_set(&card->write.irq_pending, 0);
                wake_up(&card->wait_q);
                return rc;
        }

        /* we have only one long running ipassist, since we can ensure
           process context of this command we can sleep */
        if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
            cmd->hdr.prot_version == QETH_PROT_IPV4) {
                if (!wait_event_timeout(reply->wait_q,
                    atomic_read(&reply->received), event_timeout))
                        goto time_err;
        } else {
                while (!atomic_read(&reply->received)) {
                        if (time_after(jiffies, timeout))
                                goto time_err;
                        cpu_relax();
                }
        }

        if (reply->rc == -EIO)
                goto error;
        rc = reply->rc;
        qeth_put_reply(reply);
        return rc;

time_err:
        reply->rc = -ETIME;
        spin_lock_irqsave(&reply->card->lock, flags);
        list_del_init(&reply->list);
        spin_unlock_irqrestore(&reply->card->lock, flags);
        atomic_inc(&reply->received);
error:
        atomic_set(&card->write.irq_pending, 0);
        qeth_release_buffer(iob->channel, iob);
        card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
        rc = reply->rc;
        qeth_put_reply(reply);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_control_data);

static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
                unsigned long data)
{
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "cmenblcb");

        iob = (struct qeth_cmd_buffer *) data;
        memcpy(&card->token.cm_filter_r,
               QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
               QETH_MPC_TOKEN_LENGTH);
        QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
        return 0;
}

static int qeth_cm_enable(struct qeth_card *card)
{
        int rc;
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "cmenable");

        iob = qeth_wait_for_buffer(&card->write);
        memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
        memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
               &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
               &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);

        rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
                                    qeth_cm_enable_cb, NULL);
        return rc;
}

static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
                unsigned long data)
{

        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");

        iob = (struct qeth_cmd_buffer *) data;
        memcpy(&card->token.cm_connection_r,
               QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
               QETH_MPC_TOKEN_LENGTH);
        QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
        return 0;
}

static int qeth_cm_setup(struct qeth_card *card)
{
        int rc;
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "cmsetup");

        iob = qeth_wait_for_buffer(&card->write);
        memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
        memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
               &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
               &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
               &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
        rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
                                    qeth_cm_setup_cb, NULL);
        return rc;

}

static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
{
        switch (card->info.type) {
        case QETH_CARD_TYPE_IQD:
                return card->info.max_mtu;
        case QETH_CARD_TYPE_OSD:
        case QETH_CARD_TYPE_OSX:
                if (!card->options.layer2)
                        return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */
                /* fall through */
        default:
                return ETH_DATA_LEN;
        }
}

static int qeth_get_mtu_outof_framesize(int framesize)
{
        switch (framesize) {
        case 0x4000:
                return 8192;
        case 0x6000:
                return 16384;
        case 0xa000:
                return 32768;
        case 0xffff:
                return 57344;
        default:
                return 0;
        }
}

static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
{
        switch (card->info.type) {
        case QETH_CARD_TYPE_OSD:
        case QETH_CARD_TYPE_OSM:
        case QETH_CARD_TYPE_OSX:
        case QETH_CARD_TYPE_IQD:
                return ((mtu >= 576) &&
                        (mtu <= card->info.max_mtu));
        case QETH_CARD_TYPE_OSN:
        default:
                return 1;
        }
}

static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
                unsigned long data)
{

        __u16 mtu, framesize;
        __u16 len;
        __u8 link_type;
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "ulpenacb");

        iob = (struct qeth_cmd_buffer *) data;
        memcpy(&card->token.ulp_filter_r,
               QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
               QETH_MPC_TOKEN_LENGTH);
        if (card->info.type == QETH_CARD_TYPE_IQD) {
                memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
                mtu = qeth_get_mtu_outof_framesize(framesize);
                if (!mtu) {
                        iob->rc = -EINVAL;
                        QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
                        return 0;
                }
                if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
                        /* frame size has changed */
                        if (card->dev &&
                            ((card->dev->mtu == card->info.initial_mtu) ||
                             (card->dev->mtu > mtu)))
                                card->dev->mtu = mtu;
                        qeth_free_qdio_buffers(card);
                }
                card->info.initial_mtu = mtu;
                card->info.max_mtu = mtu;
                card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
        } else {
                card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
                        iob->data);
                card->info.initial_mtu = min(card->info.max_mtu,
                                        qeth_get_initial_mtu_for_card(card));
                card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
        }

        memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
        if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
                memcpy(&link_type,
                       QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
                card->info.link_type = link_type;
        } else
                card->info.link_type = 0;
        QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
        QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
        return 0;
}

static int qeth_ulp_enable(struct qeth_card *card)
{
        int rc;
        char prot_type;
        struct qeth_cmd_buffer *iob;

        /*FIXME: trace view callbacks*/
        QETH_DBF_TEXT(SETUP, 2, "ulpenabl");

        iob = qeth_wait_for_buffer(&card->write);
        memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);

        *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
                (__u8) card->info.portno;
        if (card->options.layer2)
                if (card->info.type == QETH_CARD_TYPE_OSN)
                        prot_type = QETH_PROT_OSN2;
                else
                        prot_type = QETH_PROT_LAYER2;
        else
                prot_type = QETH_PROT_TCPIP;

        memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
        memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
               &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
               &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
        rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
                                    qeth_ulp_enable_cb, NULL);
        return rc;

}

static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
                unsigned long data)
{
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");

        iob = (struct qeth_cmd_buffer *) data;
        memcpy(&card->token.ulp_connection_r,
               QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
               QETH_MPC_TOKEN_LENGTH);
        if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
                     3)) {
                QETH_DBF_TEXT(SETUP, 2, "olmlimit");
                dev_err(&card->gdev->dev, "A connection could not be "
                        "established because of an OLM limit\n");
                iob->rc = -EMLINK;
        }
        QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
        return 0;
}

static int qeth_ulp_setup(struct qeth_card *card)
{
        int rc;
        __u16 temp;
        struct qeth_cmd_buffer *iob;
        struct ccw_dev_id dev_id;

        QETH_DBF_TEXT(SETUP, 2, "ulpsetup");

        iob = qeth_wait_for_buffer(&card->write);
        memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);

        memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
               &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
               &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
               &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);

        ccw_device_get_id(CARD_DDEV(card), &dev_id);
        memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
        temp = (card->info.cula << 8) + card->info.unit_addr2;
        memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
        rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
                                    qeth_ulp_setup_cb, NULL);
        return rc;
}

static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
{
        int rc;
        struct qeth_qdio_out_buffer *newbuf;

        rc = 0;
        newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
        if (!newbuf) {
                rc = -ENOMEM;
                goto out;
        }
        newbuf->buffer = q->qdio_bufs[bidx];
        skb_queue_head_init(&newbuf->skb_list);
        lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
        newbuf->q = q;
        newbuf->aob = NULL;
        newbuf->next_pending = q->bufs[bidx];
        atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
        q->bufs[bidx] = newbuf;
        if (q->bufstates) {
                q->bufstates[bidx].user = newbuf;
                QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
                QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
                QETH_CARD_TEXT_(q->card, 2, "%lx",
                                (long) newbuf->next_pending);
        }
out:
        return rc;
}

static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
{
        if (!q)
                return;

        qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
        kfree(q);
}

static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
{
        struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);

        if (!q)
                return NULL;

        if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
                kfree(q);
                return NULL;
        }
        return q;
}

static int qeth_alloc_qdio_buffers(struct qeth_card *card)
{
        int i, j;

        QETH_DBF_TEXT(SETUP, 2, "allcqdbf");

        if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
                QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
                return 0;

        QETH_DBF_TEXT(SETUP, 2, "inq");
        card->qdio.in_q = qeth_alloc_qdio_queue();
        if (!card->qdio.in_q)
                goto out_nomem;

        /* inbound buffer pool */
        if (qeth_alloc_buffer_pool(card))
                goto out_freeinq;

        /* outbound */
        card->qdio.out_qs =
                kzalloc(card->qdio.no_out_queues *
                        sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
        if (!card->qdio.out_qs)
                goto out_freepool;
        for (i = 0; i < card->qdio.no_out_queues; ++i) {
                card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
                if (!card->qdio.out_qs[i])
                        goto out_freeoutq;
                QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
                QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
                card->qdio.out_qs[i]->queue_no = i;
                /* give outbound qeth_qdio_buffers their qdio_buffers */
                for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                        WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
                        if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
                                goto out_freeoutqbufs;
                }
        }

        /* completion */
        if (qeth_alloc_cq(card))
                goto out_freeoutq;

        return 0;

out_freeoutqbufs:
        while (j > 0) {
                --j;
                kmem_cache_free(qeth_qdio_outbuf_cache,
                                card->qdio.out_qs[i]->bufs[j]);
                card->qdio.out_qs[i]->bufs[j] = NULL;
        }
out_freeoutq:
        while (i > 0) {
                qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
                qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
        }
        kfree(card->qdio.out_qs);
        card->qdio.out_qs = NULL;
out_freepool:
        qeth_free_buffer_pool(card);
out_freeinq:
        qeth_free_qdio_queue(card->qdio.in_q);
        card->qdio.in_q = NULL;
out_nomem:
        atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
        return -ENOMEM;
}

static void qeth_free_qdio_buffers(struct qeth_card *card)
{
        int i, j;

        if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
                QETH_QDIO_UNINITIALIZED)
                return;

        qeth_free_cq(card);
        cancel_delayed_work_sync(&card->buffer_reclaim_work);
        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                if (card->qdio.in_q->bufs[j].rx_skb)
                        dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
        }
        qeth_free_qdio_queue(card->qdio.in_q);
        card->qdio.in_q = NULL;
        /* inbound buffer pool */
        qeth_free_buffer_pool(card);
        /* free outbound qdio_qs */
        if (card->qdio.out_qs) {
                for (i = 0; i < card->qdio.no_out_queues; ++i) {
                        qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
                        qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
                }
                kfree(card->qdio.out_qs);
                card->qdio.out_qs = NULL;
        }
}

static void qeth_create_qib_param_field(struct qeth_card *card,
                char *param_field)
{

        param_field[0] = _ascebc['P'];
        param_field[1] = _ascebc['C'];
        param_field[2] = _ascebc['I'];
        param_field[3] = _ascebc['T'];
        *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
        *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
        *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
}

static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
                char *param_field)
{
        param_field[16] = _ascebc['B'];
        param_field[17] = _ascebc['L'];
        param_field[18] = _ascebc['K'];
        param_field[19] = _ascebc['T'];
        *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
        *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
        *((unsigned int *) (&param_field[28])) =
                card->info.blkt.inter_packet_jumbo;
}

static int qeth_qdio_activate(struct qeth_card *card)
{
        QETH_DBF_TEXT(SETUP, 3, "qdioact");
        return qdio_activate(CARD_DDEV(card));
}

static int qeth_dm_act(struct qeth_card *card)
{
        int rc;
        struct qeth_cmd_buffer *iob;

        QETH_DBF_TEXT(SETUP, 2, "dmact");

        iob = qeth_wait_for_buffer(&card->write);
        memcpy(iob->data, DM_ACT, DM_ACT_SIZE);

        memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
               &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
               &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
        rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
        return rc;
}

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

        QETH_DBF_TEXT(SETUP, 2, "mpcinit");

        rc = qeth_issue_next_read(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
                return rc;
        }
        rc = qeth_cm_enable(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
                goto out_qdio;
        }
        rc = qeth_cm_setup(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
                goto out_qdio;
        }
        rc = qeth_ulp_enable(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
                goto out_qdio;
        }
        rc = qeth_ulp_setup(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
                goto out_qdio;
        }
        rc = qeth_alloc_qdio_buffers(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
                goto out_qdio;
        }
        rc = qeth_qdio_establish(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
                qeth_free_qdio_buffers(card);
                goto out_qdio;
        }
        rc = qeth_qdio_activate(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
                goto out_qdio;
        }
        rc = qeth_dm_act(card);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
                goto out_qdio;
        }

        return 0;
out_qdio:
        qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
        qdio_free(CARD_DDEV(card));
        return rc;
}

void qeth_print_status_message(struct qeth_card *card)
{
        switch (card->info.type) {
        case QETH_CARD_TYPE_OSD:
        case QETH_CARD_TYPE_OSM:
        case QETH_CARD_TYPE_OSX:
                /* VM will use a non-zero first character
                 * to indicate a HiperSockets like reporting
                 * of the level OSA sets the first character to zero
                 * */
                if (!card->info.mcl_level[0]) {
                        sprintf(card->info.mcl_level, "%02x%02x",
                                card->info.mcl_level[2],
                                card->info.mcl_level[3]);
                        break;
                }
                /* fallthrough */
        case QETH_CARD_TYPE_IQD:
                if ((card->info.guestlan) ||
                    (card->info.mcl_level[0] & 0x80)) {
                        card->info.mcl_level[0] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[0]];
                        card->info.mcl_level[1] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[1]];
                        card->info.mcl_level[2] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[2]];
                        card->info.mcl_level[3] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[3]];
                        card->info.mcl_level[QETH_MCL_LENGTH] = 0;
                }
                break;
        default:
                memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
        }
        dev_info(&card->gdev->dev,
                 "Device is a%s card%s%s%s\nwith link type %s.\n",
                 qeth_get_cardname(card),
                 (card->info.mcl_level[0]) ? " (level: " : "",
                 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
                 (card->info.mcl_level[0]) ? ")" : "",
                 qeth_get_cardname_short(card));
}
EXPORT_SYMBOL_GPL(qeth_print_status_message);

static void qeth_initialize_working_pool_list(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *entry;

        QETH_CARD_TEXT(card, 5, "inwrklst");

        list_for_each_entry(entry,
                            &card->qdio.init_pool.entry_list, init_list) {
                qeth_put_buffer_pool_entry(card, entry);
        }
}

static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
                                        struct qeth_card *card)
{
        struct list_head *plh;
        struct qeth_buffer_pool_entry *entry;
        int i, free;
        struct page *page;

        if (list_empty(&card->qdio.in_buf_pool.entry_list))
                return NULL;

        list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
                entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
                free = 1;
                for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                        if (page_count(virt_to_page(entry->elements[i])) > 1) {
                                free = 0;
                                break;
                        }
                }
                if (free) {
                        list_del_init(&entry->list);
                        return entry;
                }
        }

        /* no free buffer in pool so take first one and swap pages */
        entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
                        struct qeth_buffer_pool_entry, list);
        for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                if (page_count(virt_to_page(entry->elements[i])) > 1) {
                        page = alloc_page(GFP_ATOMIC);
                        if (!page) {
                                return NULL;
                        } else {
                                free_page((unsigned long)entry->elements[i]);
                                entry->elements[i] = page_address(page);
                                if (card->options.performance_stats)
                                        card->perf_stats.sg_alloc_page_rx++;
                        }
                }
        }
        list_del_init(&entry->list);
        return entry;
}

static int qeth_init_input_buffer(struct qeth_card *card,
                struct qeth_qdio_buffer *buf)
{
        struct qeth_buffer_pool_entry *pool_entry;
        int i;

        if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
                buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
                if (!buf->rx_skb)
                        return 1;
        }

        pool_entry = qeth_find_free_buffer_pool_entry(card);
        if (!pool_entry)
                return 1;

        /*
         * since the buffer is accessed only from the input_tasklet
         * there shouldn't be a need to synchronize; also, since we use
         * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
         * buffers
         */

        buf->pool_entry = pool_entry;
        for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                buf->buffer->element[i].length = PAGE_SIZE;
                buf->buffer->element[i].addr =  pool_entry->elements[i];
                if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
                        buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
                else
                        buf->buffer->element[i].eflags = 0;
                buf->buffer->element[i].sflags = 0;
        }
        return 0;
}

int qeth_init_qdio_queues(struct qeth_card *card)
{
        int i, j;
        int rc;

        QETH_DBF_TEXT(SETUP, 2, "initqdqs");

        /* inbound queue */
        qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
                           QDIO_MAX_BUFFERS_PER_Q);
        qeth_initialize_working_pool_list(card);
        /*give only as many buffers to hardware as we have buffer pool entries*/
        for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
                qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
        card->qdio.in_q->next_buf_to_init =
                card->qdio.in_buf_pool.buf_count - 1;
        rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
                     card->qdio.in_buf_pool.buf_count - 1);
        if (rc) {
                QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
                return rc;
        }

        /* completion */
        rc = qeth_cq_init(card);
        if (rc) {
                return rc;
        }

        /* outbound queue */
        for (i = 0; i < card->qdio.no_out_queues; ++i) {
                qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
                                   QDIO_MAX_BUFFERS_PER_Q);
                for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                        qeth_clear_output_buffer(card->qdio.out_qs[i],
                                        card->qdio.out_qs[i]->bufs[j],
                                        QETH_QDIO_BUF_EMPTY);
                }
                card->qdio.out_qs[i]->card = card;
                card->qdio.out_qs[i]->next_buf_to_fill = 0;
                card->qdio.out_qs[i]->do_pack = 0;
                atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
                atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
                atomic_set(&card->qdio.out_qs[i]->state,
                           QETH_OUT_Q_UNLOCKED);
        }
        return 0;
}
EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);

static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
{
        switch (link_type) {
        case QETH_LINK_TYPE_HSTR:
                return 2;
        default:
                return 1;
        }
}

static void qeth_fill_ipacmd_header(struct qeth_card *card,
                struct qeth_ipa_cmd *cmd, __u8 command,
                enum qeth_prot_versions prot)
{
        memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
        cmd->hdr.command = command;
        cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
        /* cmd->hdr.seqno is set by qeth_send_control_data() */
        cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
        cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
        if (card->options.layer2)
                cmd->hdr.prim_version_no = 2;
        else
                cmd->hdr.prim_version_no = 1;
        cmd->hdr.param_count = 1;
        cmd->hdr.prot_version = prot;
        cmd->hdr.ipa_supported = 0;
        cmd->hdr.ipa_enabled = 0;
}

struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
                enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
{
        struct qeth_cmd_buffer *iob;
        struct qeth_ipa_cmd *cmd;

        iob = qeth_get_buffer(&card->write);
        if (iob) {
                cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
                qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
        } else {
                dev_warn(&card->gdev->dev,
                         "The qeth driver ran out of channel command buffers\n");
                QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
                                 dev_name(&card->gdev->dev));
        }

        return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);

void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
                char prot_type)
{
        memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
        memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
        memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
               &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
}
EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);

/**
 * qeth_send_ipa_cmd() - send an IPA command
 *
 * See qeth_send_control_data() for explanation of the arguments.
 */

int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
                int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
                        unsigned long),