qeth_core_main.c

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/*
 *    Copyright IBM Corp. 2007, 2009
 *    Author(s): Utz Bacher <[email protected]>,
 *       Frank Pavlic <[email protected]>,
 *       Thomas Spatzier <[email protected]>,
 *       Frank Blaschka <[email protected]>
 */

#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 <net/iucv/af_iucv.h>

#include <asm/ebcdic.h>
#include <asm/io.h>
#include <asm/sysinfo.h>
#include <asm/compat.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, 128, 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 unsigned int known_devices[][6] = QETH_MODELLIST_ARRAY;
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 int qeth_issue_next_read(struct qeth_card *);
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);

static inline const char *qeth_get_cardname(struct qeth_card *card)
{
    if (card->info.guestlan) {
        switch (card->info.type) {
        case QETH_CARD_TYPE_OSD:
            return " Guest LAN QDIO";
        case QETH_CARD_TYPE_IQD:
            return " Guest LAN Hiper";
        case QETH_CARD_TYPE_OSM:
            return " Guest LAN QDIO - OSM";
        case QETH_CARD_TYPE_OSX:
            return " Guest LAN 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 "GuestLAN QDIO";
        case QETH_CARD_TYPE_IQD:
            return "GuestLAN Hiper";
        case QETH_CARD_TYPE_OSM:
            return "GuestLAN OSM";
        case QETH_CARD_TYPE_OSX:
            return "GuestLAN 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_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)
{
    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 inline int qeth_cq_init(struct qeth_card *card)
{
    int rc;

    if (card->options.cq == QETH_CQ_ENABLED) {
        QETH_DBF_TEXT(SETUP, 2, "cqinit");
        memset(card->qdio.c_q->qdio_bufs, 0,
               QDIO_MAX_BUFFERS_PER_Q * sizeof(struct qdio_buffer));
        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 inline 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 = kzalloc(sizeof(struct qeth_qdio_q),
                     GFP_KERNEL);
        if (!card->qdio.c_q) {
            rc = -1;
            goto kmsg_out;
        }
        QETH_DBF_HEX(SETUP, 2, &card->qdio.c_q, sizeof(void *));

        for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
            card->qdio.c_q->bufs[i].buffer =
                &card->qdio.c_q->qdio_bufs[i];
        }

        card->qdio.no_in_queues = 2;

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

static inline 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 inline 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;
                BUG_ON(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 inline 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);

    BUG_ON(buffer == NULL);

    if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
               QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
        notification = TX_NOTIFY_OK;
    } else {
        BUG_ON(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 struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
{
    struct qeth_reply *reply;

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

static void qeth_get_reply(struct qeth_reply *reply)
{
    WARN_ON(atomic_read(&reply->refcnt) <= 0);
    atomic_inc(&reply->refcnt);
}

static void qeth_put_reply(struct qeth_reply *reply)
{
    WARN_ON(atomic_read(&reply->refcnt) <= 0);
    if (atomic_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:
                dev_warn(&card->gdev->dev,
                       "The link for interface %s on CHPID"
                       " 0x%X failed\n",
                       QETH_CARD_IFNAME(card),
                       card->info.chpid);
                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_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 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(&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 (!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 && (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) {
            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 (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 */
    BUG_ON(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 && skb->protocol == ETH_P_AF_IUCV) {
            if (skb->sk) {
                iucv = iucv_sk(skb->sk);
                iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
            }
        }
        atomic_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_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)
        dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
    kfree(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);
            kfree(card->qdio.out_qs[i]);
        }
        kfree(card->qdio.out_qs);
        card->qdio.out_qs = NULL;
    }
}

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 channelPath_dsc {
        u8 flags;
        u8 lsn;
        u8 desc;
        u8 chpid;
        u8 swla;
        u8 zeroes;
        u8 chla;
        u8 chpp;
    } *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.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.add_hhlen = DEFAULT_ADD_HHLEN;
    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 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->ip_list);
    INIT_LIST_HEAD(card->ip_tbd_list);
    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 = 0;
    card->ipato.invert4 = 0;
    card->ipato.invert6 = 0;
    /* init QDIO stuff */
    qeth_init_qdio_info(card);
    INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
    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 *));
    card->ip_tbd_list = kzalloc(sizeof(struct list_head), GFP_KERNEL);
    if (!card->ip_tbd_list) {
        QETH_DBF_TEXT(SETUP, 0, "iptbdnom");
        goto out_card;
    }
    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->ip_tbd_list);
out_card:
    kfree(card);
out:
    return NULL;
}

static int qeth_determine_card_type(struct qeth_card *card)
{
    int i = 0;

    QETH_DBF_TEXT(SETUP, 2, "detcdtyp");

    card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
    card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
    while (known_devices[i][QETH_DEV_MODEL_IND]) {
        if ((CARD_RDEV(card)->id.dev_type ==
                known_devices[i][QETH_DEV_TYPE_IND]) &&
            (CARD_RDEV(card)->id.dev_model ==
                known_devices[i][QETH_DEV_MODEL_IND])) {
            card->info.type = known_devices[i][QETH_DEV_MODEL_IND];
            card->qdio.no_out_queues =
                known_devices[i][QETH_QUEUE_NO_IND];
            card->qdio.no_in_queues = 1;
            card->info.is_multicast_different =
                known_devices[i][QETH_MULTICAST_IND];
            qeth_update_from_chp_desc(card);
            return 0;
        }
        i++;
    }
    card->info.type = QETH_CARD_TYPE_UNKNOWN;
    dev_err(&card->gdev->dev, "The adapter hardware is of an "
        "unknown type\n");
    return -ENOENT;
}

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);
        qdio_free(CARD_DDEV(card));
        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 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] == 0xF5 || prcd[76] == 0xF6)) {
        card->info.blkt.time_total = 250;
        card->info.blkt.inter_packet = 5;
        card->info.blkt.inter_packet_jumbo = 15;
    } else {
        card->info.blkt.time_total = 0;
        card->info.blkt.inter_packet = 0;
        card->info.blkt.inter_packet_jumbo = 0;
    }
}

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);
    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);
    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;
    }

    if ((!QETH_IDX_NO_PORTNAME_REQUIRED(iob->data)) ||
         (card->info.type == QETH_CARD_TYPE_OSD))
        card->info.portname_required = 1;

    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);

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

    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;
    if (card->state == CARD_STATE_DOWN)
        reply->seqno = QETH_IDX_COMMAND_SEQNO;
    else
        reply->seqno = card->seqno.ipa++;
    init_waitqueue_head(&reply->wait_q);
    spin_lock_irqsave(&card->lock, flags);
    list_add_tail(&reply->list, &card->cmd_waiter_list);
    spin_unlock_irqrestore(&card->lock, flags);
    QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);

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

    if (IS_IPA(iob->data))
        event_timeout = QETH_IPA_TIMEOUT;
    else
        event_timeout = QETH_TIMEOUT;
    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 */
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    if ((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 inline int qeth_get_initial_mtu_for_card(struct qeth_card *card)
{
    switch (card->info.type) {
    case QETH_CARD_TYPE_UNKNOWN:
        return 1500;
    case QETH_CARD_TYPE_IQD:
        return card->info.max_mtu;
    case QETH_CARD_TYPE_OSD:
        switch (card->info.link_type) {
        case QETH_LINK_TYPE_HSTR:
        case QETH_LINK_TYPE_LANE_TR:
            return 2000;
        default:
            return 1492;
        }
    case QETH_CARD_TYPE_OSM:
    case QETH_CARD_TYPE_OSX:
        return 1492;
    default:
        return 1500;
    }
}

static inline 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 inline 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:
    case QETH_CARD_TYPE_UNKNOWN:
    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.initial_mtu = qeth_get_initial_mtu_for_card(card);
        card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
            iob->data);
        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);
    memcpy(QETH_ULP_ENABLE_PORTNAME_AND_LL(iob->data),
           card->info.portname, 9);
    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;
    int rc = 0;

    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 rc;
}

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 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;

    card->qdio.in_q = kzalloc(sizeof(struct qeth_qdio_q),
                   GFP_KERNEL);
    if (!card->qdio.in_q)
        goto out_nomem;
    QETH_DBF_TEXT(SETUP, 2, "inq");
    QETH_DBF_HEX(SETUP, 2, &card->qdio.in_q, sizeof(void *));
    memset(card->qdio.in_q, 0, sizeof(struct qeth_qdio_q));
    /* give inbound qeth_qdio_buffers their qdio_buffers */
    for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
        card->qdio.in_q->bufs[i].buffer =
            &card->qdio.in_q->qdio_bufs[i];
        card->qdio.in_q->bufs[i].rx_skb = NULL;
    }
    /* 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] = kzalloc(sizeof(struct qeth_qdio_out_q),
                           GFP_KERNEL);
        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) {
            BUG_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) {
        kfree(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:
    kfree(card->qdio.in_q);
    card->qdio.in_q = NULL;
out_nomem:
    atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
    return -ENOMEM;
}

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);
    return rc;
}

static void qeth_print_status_with_portname(struct qeth_card *card)
{
    char dbf_text[15];
    int i;

    sprintf(dbf_text, "%s", card->info.portname + 1);
    for (i = 0; i < 8; i++)
        dbf_text[i] =
            (char) _ebcasc[(__u8) dbf_text[i]];
    dbf_text[8] = 0;
    dev_info(&card->gdev->dev, "Device is a%s card%s%s%s\n"
           "with link type %s (portname: %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),
           dbf_text);

}

static void qeth_print_status_no_portname(struct qeth_card *card)
{
    if (card->info.portname[0])
        dev_info(&card->gdev->dev, "Device is a%s "
               "card%s%s%s\nwith link type %s "
               "(no portname needed by interface).\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));
    else
        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));
}

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]);

            card->info.mcl_level[QETH_MCL_LENGTH] = 0;
            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);
    }
    if (card->info.portname_required)
        qeth_print_status_with_portname(card);
    else
        qeth_print_status_no_portname(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 inline 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 */
    memset(card->qdio.in_q->qdio_bufs, 0,
           QDIO_MAX_BUFFERS_PER_Q * sizeof(struct qdio_buffer));
    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) {
        memset(card->qdio.out_qs[i]->qdio_bufs, 0,
               QDIO_MAX_BUFFERS_PER_Q * sizeof(struct qdio_buffer));
        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 inline __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 = card->seqno.ipa;
    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_wait_for_buffer(&card->write);
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);

    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);

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),
        void *reply_param)
{
    int rc;
    char prot_type;

    QETH_CARD_TEXT(card, 4, "sendipa");

    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;
    qeth_prepare_ipa_cmd(card, iob, prot_type);
    rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
                        iob, reply_cb, reply_param);
    if (rc == -ETIME) {
        qeth_clear_ipacmd_list(card);
        qeth_schedule_recovery(card);
    }
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);

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

    QETH_DBF_TEXT(SETUP, 2, "strtlan");

    iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
    rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_startlan);

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

    QETH_CARD_TEXT(card, 4, "defadpcb");

    cmd = (struct qeth_ipa_cmd *) data;
    if (cmd->hdr.return_code == 0)
        cmd->hdr.return_code =
            cmd->data.setadapterparms.hdr.return_code;
    return 0;
}
EXPORT_SYMBOL_GPL(qeth_default_setadapterparms_cb);

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

    QETH_CARD_TEXT(card, 3, "quyadpcb");

    cmd = (struct qeth_ipa_cmd *) data;
    if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
        card->info.link_type =
              cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
        QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
    }
    card->options.adp.supported_funcs =
        cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
    return qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
}

struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
        __u32 command, __u32 cmdlen)
{
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;

    iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
                     QETH_PROT_IPV4);
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
    cmd->data.setadapterparms.hdr.command_code = command;
    cmd->data.setadapterparms.hdr.used_total = 1;
    cmd->data.setadapterparms.hdr.seq_no = 1;

    return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_adapter_cmd);

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

    QETH_CARD_TEXT(card, 3, "queryadp");
    iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
                   sizeof(struct qeth_ipacmd_setadpparms));
    rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);

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

    QETH_DBF_TEXT(SETUP, 2, "qipasscb");

    cmd = (struct qeth_ipa_cmd *) data;

    switch (cmd->hdr.return_code) {
    case IPA_RC_NOTSUPP:
    case IPA_RC_L2_UNSUPPORTED_CMD:
        QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
        card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
        card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
        return -0;
    default:
        if (cmd->hdr.return_code) {
            QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
                        "rc=%d\n",
                        dev_name(&card->gdev->dev),
                        cmd->hdr.return_code);
            return 0;
        }
    }

    if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
        card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
        card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
    } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
        card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
        card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
    } else
        QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
                    "\n", dev_name(&card->gdev->dev));
    QETH_DBF_TEXT(SETUP, 2, "suppenbl");
    QETH_DBF_TEXT_(SETUP, 2, "%08x", (__u32)cmd->hdr.ipa_supported);
    QETH_DBF_TEXT_(SETUP, 2, "%08x", (__u32)cmd->hdr.ipa_enabled);
    return 0;
}

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

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

static int qeth_query_setdiagass_cb(struct qeth_card *card,
        struct qeth_reply *reply, unsigned long data)
{
    struct qeth_ipa_cmd *cmd;
    __u16 rc;

    cmd = (struct qeth_ipa_cmd *)data;
    rc = cmd->hdr.return_code;
    if (rc)
        QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
    else
        card->info.diagass_support = cmd->data.diagass.ext;
    return 0;
}

static int qeth_query_setdiagass(struct qeth_card *card)
{
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd    *cmd;

    QETH_DBF_TEXT(SETUP, 2, "qdiagass");
    iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    cmd->data.diagass.subcmd_len = 16;
    cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
    return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
}

static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
{
    unsigned long info = get_zeroed_page(GFP_KERNEL);
    struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
    struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
    struct ccw_dev_id ccwid;
    int level;

    tid->chpid = card->info.chpid;
    ccw_device_get_id(CARD_RDEV(card), &ccwid);
    tid->ssid = ccwid.ssid;
    tid->devno = ccwid.devno;
    if (!info)
        return;
    level = stsi(NULL, 0, 0, 0);
    if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
        tid->lparnr = info222->lpar_number;
    if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
        EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
        memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
    }
    free_page(info);
    return;
}

static int qeth_hw_trap_cb(struct qeth_card *card,
        struct qeth_reply *reply, unsigned long data)
{
    struct qeth_ipa_cmd *cmd;
    __u16 rc;

    cmd = (struct qeth_ipa_cmd *)data;
    rc = cmd->hdr.return_code;
    if (rc)
        QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
    return 0;
}

int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
{
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;

    QETH_DBF_TEXT(SETUP, 2, "diagtrap");
    iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    cmd->data.diagass.subcmd_len = 80;
    cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
    cmd->data.diagass.type = 1;
    cmd->data.diagass.action = action;
    switch (action) {
    case QETH_DIAGS_TRAP_ARM:
        cmd->data.diagass.options = 0x0003;
        cmd->data.diagass.ext = 0x00010000 +
            sizeof(struct qeth_trap_id);
        qeth_get_trap_id(card,
            (struct qeth_trap_id *)cmd->data.diagass.cdata);
        break;
    case QETH_DIAGS_TRAP_DISARM:
        cmd->data.diagass.options = 0x0001;
        break;
    case QETH_DIAGS_TRAP_CAPTURE:
        break;
    }
    return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
}
EXPORT_SYMBOL_GPL(qeth_hw_trap);

int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf,
        unsigned int qdio_error, const char *dbftext)
{
    if (qdio_error) {
        QETH_CARD_TEXT(card, 2, dbftext);
        QETH_CARD_TEXT_(card, 2, " F15=%02X",
                   buf->element[15].sflags);
        QETH_CARD_TEXT_(card, 2, " F14=%02X",
                   buf->element[14].sflags);
        QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
        if ((buf->element[15].sflags) == 0x12) {
            card->stats.rx_dropped++;
            return 0;
        } else
            return 1;
    }
    return 0;
}
EXPORT_SYMBOL_GPL(qeth_check_qdio_errors);

void qeth_buffer_reclaim_work(struct work_struct *work)
{
    struct qeth_card *card = container_of(work, struct qeth_card,
        buffer_reclaim_work.work);

    QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
    qeth_queue_input_buffer(card, card->reclaim_index);
}

void qeth_queue_input_buffer(struct qeth_card *card, int index)
{
    struct qeth_qdio_q *queue = card->qdio.in_q;
    struct list_head *lh;
    int count;
    int i;
    int rc;
    int newcount = 0;

    count = (index < queue->next_buf_to_init)?
        card->qdio.in_buf_pool.buf_count -
        (queue->next_buf_to_init - index) :
        card->qdio.in_buf_pool.buf_count -
        (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
    /* only requeue at a certain threshold to avoid SIGAs */
    if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
        for (i = queue->next_buf_to_init;
             i < queue->next_buf_to_init + count; ++i) {
            if (qeth_init_input_buffer(card,
                &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
                break;
            } else {
                newcount++;
            }
        }

        if (newcount < count) {
            /* we are in memory shortage so we switch back to
               traditional skb allocation and drop packages */
            atomic_set(&card->force_alloc_skb, 3);
            count = newcount;
        } else {
            atomic_add_unless(&card->force_alloc_skb, -1, 0);
        }

        if (!count) {
            i = 0;
            list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
                i++;
            if (i == card->qdio.in_buf_pool.buf_count) {
                QETH_CARD_TEXT(card, 2, "qsarbw");
                card->reclaim_index = index;
                schedule_delayed_work(
                    &card->buffer_reclaim_work,
                    QETH_RECLAIM_WORK_TIME);
            }
            return;
        }

        /*
         * according to old code it should be avoided to requeue all
         * 128 buffers in order to benefit from PCI avoidance.
         * this function keeps at least one buffer (the buffer at
         * 'index') un-requeued -> this buffer is the first buffer that
         * will be requeued the next time
         */
        if (card->options.performance_stats) {
            card->perf_stats.inbound_do_qdio_cnt++;
            card->perf_stats.inbound_do_qdio_start_time =
                qeth_get_micros();
        }
        rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
                 queue->next_buf_to_init, count);
        if (card->options.performance_stats)
            card->perf_stats.inbound_do_qdio_time +=
                qeth_get_micros() -
                card->perf_stats.inbound_do_qdio_start_time;
        if (rc) {
            QETH_CARD_TEXT(card, 2, "qinberr");
        }
        queue->next_buf_to_init = (queue->next_buf_to_init + count) %
                      QDIO_MAX_BUFFERS_PER_Q;
    }
}
EXPORT_SYMBOL_GPL(qeth_queue_input_buffer);

static int qeth_handle_send_error(struct qeth_card *card,
        struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
{
    int sbalf15 = buffer->buffer->element[15].sflags;

    QETH_CARD_TEXT(card, 6, "hdsnderr");
    if (card->info.type == QETH_CARD_TYPE_IQD) {
        if (sbalf15 == 0) {
            qdio_err = 0;
        } else {
            qdio_err = 1;
        }
    }
    qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");

    if (!qdio_err)
        return QETH_SEND_ERROR_NONE;

    if ((sbalf15 >= 15) && (sbalf15 <= 31))
        return QETH_SEND_ERROR_RETRY;

    QETH_CARD_TEXT(card, 1, "lnkfail");
    QETH_CARD_TEXT_(card, 1, "%04x %02x",
               (u16)qdio_err, (u8)sbalf15);
    return QETH_SEND_ERROR_LINK_FAILURE;
}

/*
 * Switched to packing state if the number of used buffers on a queue
 * reaches a certain limit.
 */
static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
{
    if (!queue->do_pack) {
        if (atomic_read(&queue->used_buffers)
            >= QETH_HIGH_WATERMARK_PACK){
            /* switch non-PACKING -> PACKING */
            QETH_CARD_TEXT(queue->card, 6, "np->pack");
            if (queue->card->options.performance_stats)
                queue->card->perf_stats.sc_dp_p++;
            queue->do_pack = 1;
        }
    }
}

/*
 * Switches from packing to non-packing mode. If there is a packing
 * buffer on the queue this buffer will be prepared to be flushed.
 * In that case 1 is returned to inform the caller. If no buffer
 * has to be flushed, zero is returned.
 */
static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
{
    struct qeth_qdio_out_buffer *buffer;
    int flush_count = 0;

    if (queue->do_pack) {
        if (atomic_read(&queue->used_buffers)
            <= QETH_LOW_WATERMARK_PACK) {
            /* switch PACKING -> non-PACKING */
            QETH_CARD_TEXT(queue->card, 6, "pack->np");
            if (queue->card->options.performance_stats)
                queue->card->perf_stats.sc_p_dp++;
            queue->do_pack = 0;
            /* flush packing buffers */
            buffer = queue->bufs[queue->next_buf_to_fill];
            if ((atomic_read(&buffer->state) ==
                        QETH_QDIO_BUF_EMPTY) &&
                (buffer->next_element_to_fill > 0)) {
                atomic_set(&buffer->state,
                       QETH_QDIO_BUF_PRIMED);
                flush_count++;
                queue->next_buf_to_fill =
                    (queue->next_buf_to_fill + 1) %
                    QDIO_MAX_BUFFERS_PER_Q;
            }
        }
    }
    return flush_count;
}


/*
 * Called to flush a packing buffer if no more pci flags are on the queue.
 * Checks if there is a packing buffer and prepares it to be flushed.
 * In that case returns 1, otherwise zero.
 */
static int qeth_flush_buffers_on_no_pci(struct qeth_qdio_out_q *queue)
{
    struct qeth_qdio_out_buffer *buffer;

    buffer = queue->bufs[queue->next_buf_to_fill];
    if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
       (buffer->next_element_to_fill > 0)) {
        /* it's a packing buffer */
        atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
        queue->next_buf_to_fill =
            (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
        return 1;
    }
    return 0;
}

static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
                   int count)
{
    struct qeth_qdio_out_buffer *buf;
    int rc;
    int i;
    unsigned int qdio_flags;

    for (i = index; i < index + count; ++i) {
        int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
        buf = queue->bufs[bidx];
        buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
                SBAL_EFLAGS_LAST_ENTRY;

        if (queue->bufstates)
            queue->bufstates[bidx].user = buf;

        if (queue->card->info.type == QETH_CARD_TYPE_IQD)
            continue;

        if (!queue->do_pack) {
            if ((atomic_read(&queue->used_buffers) >=
                (QETH_HIGH_WATERMARK_PACK -
                 QETH_WATERMARK_PACK_FUZZ)) &&
                !atomic_read(&queue->set_pci_flags_count)) {
                /* it's likely that we'll go to packing
                 * mode soon */
                atomic_inc(&queue->set_pci_flags_count);
                buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
            }
        } else {
            if (!atomic_read(&queue->set_pci_flags_count)) {
                /*
                 * there's no outstanding PCI any more, so we
                 * have to request a PCI to be sure the the PCI
                 * will wake at some time in the future then we
                 * can flush packed buffers that might still be
                 * hanging around, which can happen if no
                 * further send was requested by the stack
                 */
                atomic_inc(&queue->set_pci_flags_count);
                buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
            }
        }
    }

    queue->card->dev->trans_start = jiffies;
    if (queue->card->options.performance_stats) {
        queue->card->perf_stats.outbound_do_qdio_cnt++;
        queue->card->perf_stats.outbound_do_qdio_start_time =
            qeth_get_micros();
    }
    qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
    if (atomic_read(&queue->set_pci_flags_count))
        qdio_flags |= QDIO_FLAG_PCI_OUT;
    rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
             queue->queue_no, index, count);
    if (queue->card->options.performance_stats)
        queue->card->perf_stats.outbound_do_qdio_time +=
            qeth_get_micros() -
            queue->card->perf_stats.outbound_do_qdio_start_time;
    atomic_add(count, &queue->used_buffers);
    if (rc) {
        queue->card->stats.tx_errors += count;
        /* ignore temporary SIGA errors without busy condition */
        if (rc == -ENOBUFS)
            return;
        QETH_CARD_TEXT(queue->card, 2, "flushbuf");
        QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
        QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
        QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
        QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);

        /* this must not happen under normal circumstances. if it
         * happens something is really wrong -> recover */
        qeth_schedule_recovery(queue->card);
        return;
    }
    if (queue->card->options.performance_stats)
        queue->card->perf_stats.bufs_sent += count;
}

static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
{
    int index;
    int flush_cnt = 0;
    int q_was_packing = 0;

    /*
     * check if weed have to switch to non-packing mode or if
     * we have to get a pci flag out on the queue
     */
    if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
        !atomic_read(&queue->set_pci_flags_count)) {
        if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
                QETH_OUT_Q_UNLOCKED) {
            /*
             * If we get in here, there was no action in
             * do_send_packet. So, we check if there is a
             * packing buffer to be flushed here.
             */
            netif_stop_queue(queue->card->dev);
            index = queue->next_buf_to_fill;
            q_was_packing = queue->do_pack;
            /* queue->do_pack may change */
            barrier();
            flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
            if (!flush_cnt &&
                !atomic_read(&queue->set_pci_flags_count))
                flush_cnt +=
                    qeth_flush_buffers_on_no_pci(queue);
            if (queue->card->options.performance_stats &&
                q_was_packing)
                queue->card->perf_stats.bufs_sent_pack +=
                    flush_cnt;
            if (flush_cnt)
                qeth_flush_buffers(queue, index, flush_cnt);
            atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
        }
    }
}

void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
        unsigned long card_ptr)
{
    struct qeth_card *card = (struct qeth_card *)card_ptr;

    if (card->dev && (card->dev->flags & IFF_UP))
        napi_schedule(&card->napi);
}
EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);

int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
{
    int rc;

    if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
        rc = -1;
        goto out;
    } else {
        if (card->options.cq == cq) {
            rc = 0;
            goto out;
        }

        if (card->state != CARD_STATE_DOWN &&
            card->state != CARD_STATE_RECOVER) {
            rc = -1;
            goto out;
        }

        qeth_free_qdio_buffers(card);
        card->options.cq = cq;
        rc = 0;
    }
out:
    return rc;

}
EXPORT_SYMBOL_GPL(qeth_configure_cq);


static void qeth_qdio_cq_handler(struct qeth_card *card,
        unsigned int qdio_err,
        unsigned int queue, int first_element, int count) {
    struct qeth_qdio_q *cq = card->qdio.c_q;
    int i;
    int rc;

    if (!qeth_is_cq(card, queue))
        goto out;

    QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
    QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
    QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);

    if (qdio_err) {
        netif_stop_queue(card->dev);
        qeth_schedule_recovery(card);
        goto out;
    }

    if (card->options.performance_stats) {
        card->perf_stats.cq_cnt++;
        card->perf_stats.cq_start_time = qeth_get_micros();
    }

    for (i = first_element; i < first_element + count; ++i) {
        int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
        struct qdio_buffer *buffer = &cq->qdio_bufs[bidx];
        int e;

        e = 0;
        while (buffer->element[e].addr) {
            unsigned long phys_aob_addr;

            phys_aob_addr = (unsigned long) buffer->element[e].addr;
            qeth_qdio_handle_aob(card, phys_aob_addr);
            buffer->element[e].addr = NULL;
            buffer->element[e].eflags = 0;
            buffer->element[e].sflags = 0;
            buffer->element[e].length = 0;

            ++e;
        }

        buffer->element[15].eflags = 0;
        buffer->element[15].sflags = 0;
    }
    rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
            card->qdio.c_q->next_buf_to_init,
            count);
    if (rc) {
        dev_warn(&card->gdev->dev,
            "QDIO reported an error, rc=%i\n", rc);
        QETH_CARD_TEXT(card, 2, "qcqherr");
    }
    card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
                   + count) % QDIO_MAX_BUFFERS_PER_Q;

    netif_wake_queue(card->dev);

    if (card->options.performance_stats) {
        int delta_t = qeth_get_micros();
        delta_t -= card->perf_stats.cq_start_time;
        card->perf_stats.cq_time += delta_t;
    }
out:
    return;
}

void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
        unsigned int queue, int first_elem, int count,
        unsigned long card_ptr)
{
    struct qeth_card *card = (struct qeth_card *)card_ptr;

    QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
    QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);

    if (qeth_is_cq(card, queue))
        qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
    else if (qdio_err)
        qeth_schedule_recovery(card);


}
EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);

void qeth_qdio_output_handler(struct ccw_device *ccwdev,
        unsigned int qdio_error, int __queue, int first_element,
        int count, unsigned long card_ptr)
{
    struct qeth_card *card        = (struct qeth_card *) card_ptr;
    struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
    struct qeth_qdio_out_buffer *buffer;
    int i;

    QETH_CARD_TEXT(card, 6, "qdouhdl");
    if (qdio_error & QDIO_ERROR_FATAL) {
        QETH_CARD_TEXT(card, 2, "achkcond");
        netif_stop_queue(card->dev);
        qeth_schedule_recovery(card);
        return;
    }
    if (card->options.performance_stats) {
        card->perf_stats.outbound_handler_cnt++;
        card->perf_stats.outbound_handler_start_time =
            qeth_get_micros();
    }
    for (i = first_element; i < (first_element + count); ++i) {
        int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
        buffer = queue->bufs[bidx];
        qeth_handle_send_error(card, buffer, qdio_error);

        if (queue->bufstates &&
            (queue->bufstates[bidx].flags &
             QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
            BUG_ON(card->options.cq != QETH_CQ_ENABLED);

            if (atomic_cmpxchg(&buffer->state,
                       QETH_QDIO_BUF_PRIMED,
                       QETH_QDIO_BUF_PENDING) ==
                QETH_QDIO_BUF_PRIMED) {
                qeth_notify_skbs(queue, buffer,
                         TX_NOTIFY_PENDING);
            }
            buffer->aob = queue->bufstates[bidx].aob;
            QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
            QETH_CARD_TEXT(queue->card, 5, "aob");
            QETH_CARD_TEXT_(queue->card, 5, "%lx",
                    virt_to_phys(buffer->aob));
            BUG_ON(bidx < 0 || bidx >= QDIO_MAX_BUFFERS_PER_Q);
            if (qeth_init_qdio_out_buf(queue, bidx)) {
                QETH_CARD_TEXT(card, 2, "outofbuf");
                qeth_schedule_recovery(card);
            }
        } else {
            if (card->options.cq == QETH_CQ_ENABLED) {
                enum iucv_tx_notify n;

                n = qeth_compute_cq_notification(
                    buffer->buffer->element[15].sflags, 0);
                qeth_notify_skbs(queue, buffer, n);
            }

            qeth_clear_output_buffer(queue, buffer,
                        QETH_QDIO_BUF_EMPTY);
        }
        qeth_cleanup_handled_pending(queue, bidx, 0);
    }
    atomic_sub(count, &queue->used_buffers);
    /* check if we need to do something on this outbound queue */
    if (card->info.type != QETH_CARD_TYPE_IQD)
        qeth_check_outbound_queue(queue);

    netif_wake_queue(queue->card->dev);
    if (card->options.performance_stats)
        card->perf_stats.outbound_handler_time += qeth_get_micros() -
            card->perf_stats.outbound_handler_start_time;
}
EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);

int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
            int ipv, int cast_type)
{
    if (!ipv && (card->info.type == QETH_CARD_TYPE_OSD ||
             card->info.type == QETH_CARD_TYPE_OSX))
        return card->qdio.default_out_queue;
    switch (card->qdio.no_out_queues) {
    case 4:
        if (cast_type && card->info.is_multicast_different)
            return card->info.is_multicast_different &
                (card->qdio.no_out_queues - 1);
        if (card->qdio.do_prio_queueing && (ipv == 4)) {
            const u8 tos = ip_hdr(skb)->tos;

            if (card->qdio.do_prio_queueing ==
                QETH_PRIO_Q_ING_TOS) {
                if (tos & IP_TOS_NOTIMPORTANT)
                    return 3;
                if (tos & IP_TOS_HIGHRELIABILITY)
                    return 2;
                if (tos & IP_TOS_HIGHTHROUGHPUT)
                    return 1;
                if (tos & IP_TOS_LOWDELAY)
                    return 0;
            }
            if (card->qdio.do_prio_queueing ==
                QETH_PRIO_Q_ING_PREC)
                return 3 - (tos >> 6);
        } else if (card->qdio.do_prio_queueing && (ipv == 6)) {
            /* TODO: IPv6!!! */
        }
        return card->qdio.default_out_queue;
    case 1: /* fallthrough for single-out-queue 1920-device */
    default:
        return card->qdio.default_out_queue;
    }
}
EXPORT_SYMBOL_GPL(qeth_get_priority_queue);

int qeth_get_elements_no(struct qeth_card *card, void *hdr,
             struct sk_buff *skb, int elems)
{
    int dlen = skb->len - skb->data_len;
    int elements_needed = PFN_UP((unsigned long)skb->data + dlen - 1) -
        PFN_DOWN((unsigned long)skb->data);

    elements_needed += skb_shinfo(skb)->nr_frags;
    if ((elements_needed + elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
        QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
            "(Number=%d / Length=%d). Discarded.\n",
            (elements_needed+elems), skb->len);
        return 0;
    }
    return elements_needed;
}
EXPORT_SYMBOL_GPL(qeth_get_elements_no);

int qeth_hdr_chk_and_bounce(struct sk_buff *skb, int len)
{
    int hroom, inpage, rest;

    if (((unsigned long)skb->data & PAGE_MASK) !=
        (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
        hroom = skb_headroom(skb);
        inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
        rest = len - inpage;
        if (rest > hroom)
            return 1;
        memmove(skb->data - rest, skb->data, skb->len - skb->data_len);
        skb->data -= rest;
        QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
    }
    return 0;
}
EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);

static inline void __qeth_fill_buffer(struct sk_buff *skb,
    struct qdio_buffer *buffer, int is_tso, int *next_element_to_fill,
    int offset)
{
    int length = skb->len - skb->data_len;
    int length_here;
    int element;
    char *data;
    int first_lap, cnt;
    struct skb_frag_struct *frag;

    element = *next_element_to_fill;
    data = skb->data;
    first_lap = (is_tso == 0 ? 1 : 0);

    if (offset >= 0) {
        data = skb->data + offset;
        length -= offset;
        first_lap = 0;
    }

    while (length > 0) {
        /* length_here is the remaining amount of data in this page */
        length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
        if (length < length_here)
            length_here = length;

        buffer->element[element].addr = data;
        buffer->element[element].length = length_here;
        length -= length_here;
        if (!length) {
            if (first_lap)
                if (skb_shinfo(skb)->nr_frags)
                    buffer->element[element].eflags =
                        SBAL_EFLAGS_FIRST_FRAG;
                else
                    buffer->element[element].eflags = 0;
            else
                buffer->element[element].eflags =
                    SBAL_EFLAGS_MIDDLE_FRAG;
        } else {
            if (first_lap)
                buffer->element[element].eflags =
                    SBAL_EFLAGS_FIRST_FRAG;
            else
                buffer->element[element].eflags =
                    SBAL_EFLAGS_MIDDLE_FRAG;
        }
        data += length_here;
        element++;
        first_lap = 0;
    }

    for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
        frag = &skb_shinfo(skb)->frags[cnt];
        buffer->element[element].addr = (char *)
            page_to_phys(skb_frag_page(frag))
            + frag->page_offset;
        buffer->element[element].length = frag->size;
        buffer->element[element].eflags = SBAL_EFLAGS_MIDDLE_FRAG;
        element++;
    }

    if (buffer->element[element - 1].eflags)
        buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
    *next_element_to_fill = element;
}

static inline int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
        struct qeth_qdio_out_buffer *buf, struct sk_buff *skb,
        struct qeth_hdr *hdr, int offset, int hd_len)
{
    struct qdio_buffer *buffer;
    int flush_cnt = 0, hdr_len, large_send = 0;

    buffer = buf->buffer;
    atomic_inc(&skb->users);
    skb_queue_tail(&buf->skb_list, skb);

    /*check first on TSO ....*/
    if (hdr->hdr.l3.id == QETH_HEADER_TYPE_TSO) {
        int element = buf->next_element_to_fill;

        hdr_len = sizeof(struct qeth_hdr_tso) +
            ((struct qeth_hdr_tso *)hdr)->ext.dg_hdr_len;
        /*fill first buffer entry only with header information */
        buffer->element[element].addr = skb->data;
        buffer->element[element].length = hdr_len;
        buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
        buf->next_element_to_fill++;
        skb->data += hdr_len;
        skb->len  -= hdr_len;
        large_send = 1;
    }

    if (offset >= 0) {
        int element = buf->next_element_to_fill;
        buffer->element[element].addr = hdr;
        buffer->element[element].length = sizeof(struct qeth_hdr) +
                            hd_len;
        buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
        buf->is_header[element] = 1;
        buf->next_element_to_fill++;
    }

    __qeth_fill_buffer(skb, buffer, large_send,
        (int *)&buf->next_element_to_fill, offset);

    if (!queue->do_pack) {
        QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
        /* set state to PRIMED -> will be flushed */
        atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
        flush_cnt = 1;
    } else {
        QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
        if (queue->card->options.performance_stats)
            queue->card->perf_stats.skbs_sent_pack++;
        if (buf->next_element_to_fill >=
                QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
            /*
             * packed buffer if full -> set state PRIMED
             * -> will be flushed
             */
            atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
            flush_cnt = 1;
        }
    }
    return flush_cnt;
}

int qeth_do_send_packet_fast(struct qeth_card *card,
        struct qeth_qdio_out_q *queue, struct sk_buff *skb,
        struct qeth_hdr *hdr, int elements_needed,
        int offset, int hd_len)
{
    struct qeth_qdio_out_buffer *buffer;
    int index;

    /* spin until we get the queue ... */
    while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
                  QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
    /* ... now we've got the queue */
    index = queue->next_buf_to_fill;
    buffer = queue->bufs[queue->next_buf_to_fill];
    /*
     * check if buffer is empty to make sure that we do not 'overtake'
     * ourselves and try to fill a buffer that is already primed
     */
    if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
        goto out;
    queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
                      QDIO_MAX_BUFFERS_PER_Q;
    atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
    qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
    qeth_flush_buffers(queue, index, 1);
    return 0;
out:
    atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
    return -EBUSY;
}
EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);

int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
        struct sk_buff *skb, struct qeth_hdr *hdr,
        int elements_needed)
{
    struct qeth_qdio_out_buffer *buffer;
    int start_index;
    int flush_count = 0;
    int do_pack = 0;
    int tmp;
    int rc = 0;

    /* spin until we get the queue ... */
    while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
                  QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
    start_index = queue->next_buf_to_fill;
    buffer = queue->bufs[queue->next_buf_to_fill];
    /*
     * check if buffer is empty to make sure that we do not 'overtake'
     * ourselves and try to fill a buffer that is already primed
     */
    if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
        atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
        return -EBUSY;
    }
    /* check if we need to switch packing state of this queue */
    qeth_switch_to_packing_if_needed(queue);
    if (queue->do_pack) {
        do_pack = 1;
        /* does packet fit in current buffer? */
        if ((QETH_MAX_BUFFER_ELEMENTS(card) -
            buffer->next_element_to_fill) < elements_needed) {
            /* ... no -> set state PRIMED */
            atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
            flush_count++;
            queue->next_buf_to_fill =
                (queue->next_buf_to_fill + 1) %
                QDIO_MAX_BUFFERS_PER_Q;
            buffer = queue->bufs[queue->next_buf_to_fill];
            /* we did a step forward, so check buffer state
             * again */
            if (atomic_read(&buffer->state) !=
                QETH_QDIO_BUF_EMPTY) {
                qeth_flush_buffers(queue, start_index,
                               flush_count);
                atomic_set(&queue->state,
                        QETH_OUT_Q_UNLOCKED);
                return -EBUSY;
            }
        }
    }
    tmp = qeth_fill_buffer(queue, buffer, skb, hdr, -1, 0);
    queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
                  QDIO_MAX_BUFFERS_PER_Q;
    flush_count += tmp;
    if (flush_count)
        qeth_flush_buffers(queue, start_index, flush_count);
    else if (!atomic_read(&queue->set_pci_flags_count))
        atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
    /*
     * queue->state will go from LOCKED -> UNLOCKED or from
     * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
     * (switch packing state or flush buffer to get another pci flag out).
     * In that case we will enter this loop
     */
    while (atomic_dec_return(&queue->state)) {
        flush_count = 0;
        start_index = queue->next_buf_to_fill;
        /* check if we can go back to non-packing state */
        flush_count += qeth_switch_to_nonpacking_if_needed(queue);
        /*
         * check if we need to flush a packing buffer to get a pci
         * flag out on the queue
         */
        if (!flush_count && !atomic_read(&queue->set_pci_flags_count))
            flush_count += qeth_flush_buffers_on_no_pci(queue);
        if (flush_count)
            qeth_flush_buffers(queue, start_index, flush_count);
    }
    /* at this point the queue is UNLOCKED again */
    if (queue->card->options.performance_stats && do_pack)
        queue->card->perf_stats.bufs_sent_pack += flush_count;

    return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_send_packet);

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

    QETH_CARD_TEXT(card, 4, "prmadpcb");

    cmd = (struct qeth_ipa_cmd *) data;
    setparms = &(cmd->data.setadapterparms);

    qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
    if (cmd->hdr.return_code) {
        QETH_CARD_TEXT_(card, 4, "prmrc%2.2x", cmd->hdr.return_code);
        setparms->data.mode = SET_PROMISC_MODE_OFF;
    }
    card->info.promisc_mode = setparms->data.mode;
    return 0;
}

void qeth_setadp_promisc_mode(struct qeth_card *card)
{
    enum qeth_ipa_promisc_modes mode;
    struct net_device *dev = card->dev;
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;

    QETH_CARD_TEXT(card, 4, "setprom");

    if (((dev->flags & IFF_PROMISC) &&
         (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
        (!(dev->flags & IFF_PROMISC) &&
         (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
        return;
    mode = SET_PROMISC_MODE_OFF;
    if (dev->flags & IFF_PROMISC)
        mode = SET_PROMISC_MODE_ON;
    QETH_CARD_TEXT_(card, 4, "mode:%x", mode);

    iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
            sizeof(struct qeth_ipacmd_setadpparms));
    cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
    cmd->data.setadapterparms.data.mode = mode;
    qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
}
EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);

int qeth_change_mtu(struct net_device *dev, int new_mtu)
{
    struct qeth_card *card;
    char dbf_text[15];

    card = dev->ml_priv;

    QETH_CARD_TEXT(card, 4, "chgmtu");
    sprintf(dbf_text, "%8x", new_mtu);
    QETH_CARD_TEXT(card, 4, dbf_text);

    if (new_mtu < 64)
        return -EINVAL;
    if (new_mtu > 65535)
        return -EINVAL;
    if ((!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) &&
        (!qeth_mtu_is_valid(card, new_mtu)))
        return -EINVAL;
    dev->mtu = new_mtu;
    return 0;
}
EXPORT_SYMBOL_GPL(qeth_change_mtu);

struct net_device_stats *qeth_get_stats(struct net_device *dev)
{
    struct qeth_card *card;

    card = dev->ml_priv;

    QETH_CARD_TEXT(card, 5, "getstat");

    return &card->stats;
}
EXPORT_SYMBOL_GPL(qeth_get_stats);

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

    QETH_CARD_TEXT(card, 4, "chgmaccb");

    cmd = (struct qeth_ipa_cmd *) data;
    if (!card->options.layer2 ||
        !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
        memcpy(card->dev->dev_addr,
               &cmd->data.setadapterparms.data.change_addr.addr,
               OSA_ADDR_LEN);
        card->info.mac_bits |= QETH_LAYER2_MAC_READ;
    }
    qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
    return 0;
}

int qeth_setadpparms_change_macaddr(struct qeth_card *card)
{
    int rc;
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;

    QETH_CARD_TEXT(card, 4, "chgmac");

    iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
                   sizeof(struct qeth_ipacmd_setadpparms));
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
    cmd->data.setadapterparms.data.change_addr.addr_size = OSA_ADDR_LEN;
    memcpy(&cmd->data.setadapterparms.data.change_addr.addr,
           card->dev->dev_addr, OSA_ADDR_LEN);
    rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
                   NULL);
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);

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

    QETH_CARD_TEXT(card, 4, "setaccb");

    cmd = (struct qeth_ipa_cmd *) data;
    access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
    QETH_DBF_TEXT_(SETUP, 2, "setaccb");
    QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
    QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
        cmd->data.setadapterparms.hdr.return_code);
    switch (cmd->data.setadapterparms.hdr.return_code) {
    case SET_ACCESS_CTRL_RC_SUCCESS:
    case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
    case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
    {
        card->options.isolation = access_ctrl_req->subcmd_code;
        if (card->options.isolation == ISOLATION_MODE_NONE) {
            dev_info(&card->gdev->dev,
                "QDIO data connection isolation is deactivated\n");
        } else {
            dev_info(&card->gdev->dev,
                "QDIO data connection isolation is activated\n");
        }
        QETH_DBF_MESSAGE(3, "OK:SET_ACCESS_CTRL(%s, %d)==%d\n",
            card->gdev->dev.kobj.name,
            access_ctrl_req->subcmd_code,
            cmd->data.setadapterparms.hdr.return_code);
        break;
    }
    case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
    {
        QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
            card->gdev->dev.kobj.name,
            access_ctrl_req->subcmd_code,
            cmd->data.setadapterparms.hdr.return_code);
        dev_err(&card->gdev->dev, "Adapter does not "
            "support QDIO data connection isolation\n");

        /* ensure isolation mode is "none" */
        card->options.isolation = ISOLATION_MODE_NONE;
        break;
    }
    case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
    {
        QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d\n",
            card->gdev->dev.kobj.name,
            access_ctrl_req->subcmd_code,
            cmd->data.setadapterparms.hdr.return_code);
        dev_err(&card->gdev->dev,
            "Adapter is dedicated. "
            "QDIO data connection isolation not supported\n");

        /* ensure isolation mode is "none" */
        card->options.isolation = ISOLATION_MODE_NONE;
        break;
    }
    case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
    {
        QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d\n",
            card->gdev->dev.kobj.name,
            access_ctrl_req->subcmd_code,
            cmd->data.setadapterparms.hdr.return_code);
        dev_err(&card->gdev->dev,
            "TSO does not permit QDIO data connection isolation\n");

        /* ensure isolation mode is "none" */
        card->options.isolation = ISOLATION_MODE_NONE;
        break;
    }
    default:
    {
        /* this should never happen */
        QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_MODE(%s,%d)==%d"
            "==UNKNOWN\n",
            card->gdev->dev.kobj.name,
            access_ctrl_req->subcmd_code,
            cmd->data.setadapterparms.hdr.return_code);

        /* ensure isolation mode is "none" */
        card->options.isolation = ISOLATION_MODE_NONE;
        break;
    }
    }
    qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
    return 0;
}

static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
        enum qeth_ipa_isolation_modes isolation)
{
    int rc;
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;
    struct qeth_set_access_ctrl *access_ctrl_req;

    QETH_CARD_TEXT(card, 4, "setacctl");

    QETH_DBF_TEXT_(SETUP, 2, "setacctl");
    QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);

    iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
                   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
                   sizeof(struct qeth_set_access_ctrl));
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
    access_ctrl_req->subcmd_code = isolation;

    rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
                   NULL);
    QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
    return rc;
}

int qeth_set_access_ctrl_online(struct qeth_card *card)
{
    int rc = 0;

    QETH_CARD_TEXT(card, 4, "setactlo");

    if ((card->info.type == QETH_CARD_TYPE_OSD ||
         card->info.type == QETH_CARD_TYPE_OSX) &&
         qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
        rc = qeth_setadpparms_set_access_ctrl(card,
            card->options.isolation);
        if (rc) {
            QETH_DBF_MESSAGE(3,
                "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
                card->gdev->dev.kobj.name,
                rc);
        }
    } else if (card->options.isolation != ISOLATION_MODE_NONE) {
        card->options.isolation = ISOLATION_MODE_NONE;

        dev_err(&card->gdev->dev, "Adapter does not "
            "support QDIO data connection isolation\n");
        rc = -EOPNOTSUPP;
    }
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);

void qeth_tx_timeout(struct net_device *dev)
{
    struct qeth_card *card;

    card = dev->ml_priv;
    QETH_CARD_TEXT(card, 4, "txtimeo");
    card->stats.tx_errors++;
    qeth_schedule_recovery(card);
}
EXPORT_SYMBOL_GPL(qeth_tx_timeout);

int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
{
    struct qeth_card *card = dev->ml_priv;
    int rc = 0;

    switch (regnum) {
    case MII_BMCR: /* Basic mode control register */
        rc = BMCR_FULLDPLX;
        if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
            (card->info.link_type != QETH_LINK_TYPE_OSN) &&
            (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
            rc |= BMCR_SPEED100;
        break;
    case MII_BMSR: /* Basic mode status register */
        rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
             BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
             BMSR_100BASE4;
        break;
    case MII_PHYSID1: /* PHYS ID 1 */
        rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
             dev->dev_addr[2];
        rc = (rc >> 5) & 0xFFFF;
        break;
    case MII_PHYSID2: /* PHYS ID 2 */
        rc = (dev->dev_addr[2] << 10) & 0xFFFF;
        break;
    case MII_ADVERTISE: /* Advertisement control reg */
        rc = ADVERTISE_ALL;
        break;
    case MII_LPA: /* Link partner ability reg */
        rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
             LPA_100BASE4 | LPA_LPACK;
        break;
    case MII_EXPANSION: /* Expansion register */
        break;
    case MII_DCOUNTER: /* disconnect counter */
        break;
    case MII_FCSCOUNTER: /* false carrier counter */
        break;
    case MII_NWAYTEST: /* N-way auto-neg test register */
        break;
    case MII_RERRCOUNTER: /* rx error counter */
        rc = card->stats.rx_errors;
        break;
    case MII_SREVISION: /* silicon revision */
        break;
    case MII_RESV1: /* reserved 1 */
        break;
    case MII_LBRERROR: /* loopback, rx, bypass error */
        break;
    case MII_PHYADDR: /* physical address */
        break;
    case MII_RESV2: /* reserved 2 */
        break;
    case MII_TPISTATUS: /* TPI status for 10mbps */
        break;
    case MII_NCONFIG: /* network interface config */
        break;
    default:
        break;
    }
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_mdio_read);

static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
        struct qeth_cmd_buffer *iob, int len,
        int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
            unsigned long),
        void *reply_param)
{
    u16 s1, s2;

    QETH_CARD_TEXT(card, 4, "sendsnmp");

    memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
    memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
           &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
    /* adjust PDU length fields in IPA_PDU_HEADER */
    s1 = (u32) IPA_PDU_HEADER_SIZE + len;
    s2 = (u32) len;
    memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
    memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
    memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
    memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
    return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
                      reply_cb, reply_param);
}

static int qeth_snmp_command_cb(struct qeth_card *card,
        struct qeth_reply *reply, unsigned long sdata)
{
    struct qeth_ipa_cmd *cmd;
    struct qeth_arp_query_info *qinfo;
    struct qeth_snmp_cmd *snmp;
    unsigned char *data;
    __u16 data_len;

    QETH_CARD_TEXT(card, 3, "snpcmdcb");

    cmd = (struct qeth_ipa_cmd *) sdata;
    data = (unsigned char *)((char *)cmd - reply->offset);
    qinfo = (struct qeth_arp_query_info *) reply->param;
    snmp = &cmd->data.setadapterparms.data.snmp;

    if (cmd->hdr.return_code) {
        QETH_CARD_TEXT_(card, 4, "scer1%i", cmd->hdr.return_code);
        return 0;
    }
    if (cmd->data.setadapterparms.hdr.return_code) {
        cmd->hdr.return_code =
            cmd->data.setadapterparms.hdr.return_code;
        QETH_CARD_TEXT_(card, 4, "scer2%i", cmd->hdr.return_code);
        return 0;
    }
    data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
    if (cmd->data.setadapterparms.hdr.seq_no == 1)
        data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
    else
        data_len -= (__u16)((char *)&snmp->request - (char *)cmd);

    /* check if there is enough room in userspace */
    if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
        QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
        cmd->hdr.return_code = IPA_RC_ENOMEM;
        return 0;
    }
    QETH_CARD_TEXT_(card, 4, "snore%i",
               cmd->data.setadapterparms.hdr.used_total);
    QETH_CARD_TEXT_(card, 4, "sseqn%i",
        cmd->data.setadapterparms.hdr.seq_no);
    /*copy entries to user buffer*/
    if (cmd->data.setadapterparms.hdr.seq_no == 1) {
        memcpy(qinfo->udata + qinfo->udata_offset,
               (char *)snmp,
               data_len + offsetof(struct qeth_snmp_cmd, data));
        qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
    } else {
        memcpy(qinfo->udata + qinfo->udata_offset,
               (char *)&snmp->request, data_len);
    }
    qinfo->udata_offset += data_len;
    /* check if all replies received ... */
        QETH_CARD_TEXT_(card, 4, "srtot%i",
                   cmd->data.setadapterparms.hdr.used_total);
        QETH_CARD_TEXT_(card, 4, "srseq%i",
                   cmd->data.setadapterparms.hdr.seq_no);
    if (cmd->data.setadapterparms.hdr.seq_no <
        cmd->data.setadapterparms.hdr.used_total)
        return 1;
    return 0;
}

int qeth_snmp_command(struct qeth_card *card, char __user *udata)
{
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;
    struct qeth_snmp_ureq *ureq;
    int req_len;
    struct qeth_arp_query_info qinfo = {0, };
    int rc = 0;

    QETH_CARD_TEXT(card, 3, "snmpcmd");

    if (card->info.guestlan)
        return -EOPNOTSUPP;

    if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
        (!card->options.layer2)) {
        return -EOPNOTSUPP;
    }
    /* skip 4 bytes (data_len struct member) to get req_len */
    if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
        return -EFAULT;
    ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
    if (IS_ERR(ureq)) {
        QETH_CARD_TEXT(card, 2, "snmpnome");
        return PTR_ERR(ureq);
    }
    qinfo.udata_len = ureq->hdr.data_len;
    qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
    if (!qinfo.udata) {
        kfree(ureq);
        return -ENOMEM;
    }
    qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);

    iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
                   QETH_SNMP_SETADP_CMDLENGTH + req_len);
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
    rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
                    qeth_snmp_command_cb, (void *)&qinfo);
    if (rc)
        QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
               QETH_CARD_IFNAME(card), rc);
    else {
        if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
            rc = -EFAULT;
    }

    kfree(ureq);
    kfree(qinfo.udata);
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_snmp_command);

static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
        struct qeth_reply *reply, unsigned long data)
{
    struct qeth_ipa_cmd *cmd;
    struct qeth_qoat_priv *priv;
    char *resdata;
    int resdatalen;

    QETH_CARD_TEXT(card, 3, "qoatcb");

    cmd = (struct qeth_ipa_cmd *)data;
    priv = (struct qeth_qoat_priv *)reply->param;
    resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
    resdata = (char *)data + 28;

    if (resdatalen > (priv->buffer_len - priv->response_len)) {
        cmd->hdr.return_code = IPA_RC_FFFF;
        return 0;
    }

    memcpy((priv->buffer + priv->response_len), resdata,
        resdatalen);
    priv->response_len += resdatalen;

    if (cmd->data.setadapterparms.hdr.seq_no <
        cmd->data.setadapterparms.hdr.used_total)
        return 1;
    return 0;
}

int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
{
    int rc = 0;
    struct qeth_cmd_buffer *iob;
    struct qeth_ipa_cmd *cmd;
    struct qeth_query_oat *oat_req;
    struct qeth_query_oat_data oat_data;
    struct qeth_qoat_priv priv;
    void __user *tmp;

    QETH_CARD_TEXT(card, 3, "qoatcmd");

    if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
        rc = -EOPNOTSUPP;
        goto out;
    }

    if (copy_from_user(&oat_data, udata,
        sizeof(struct qeth_query_oat_data))) {
            rc = -EFAULT;
            goto out;
    }

    priv.buffer_len = oat_data.buffer_len;
    priv.response_len = 0;
    priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
    if (!priv.buffer) {
        rc = -ENOMEM;
        goto out;
    }

    iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
                   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
                   sizeof(struct qeth_query_oat));
    cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
    oat_req = &cmd->data.setadapterparms.data.query_oat;
    oat_req->subcmd_code = oat_data.command;

    rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
                   &priv);
    if (!rc) {
        if (is_compat_task())
            tmp = compat_ptr(oat_data.ptr);
        else
            tmp = (void __user *)(unsigned long)oat_data.ptr;

        if (copy_to_user(tmp, priv.buffer,
            priv.response_len)) {
            rc = -EFAULT;
            goto out_free;
        }

        oat_data.response_len = priv.response_len;

        if (copy_to_user(udata, &oat_data,
            sizeof(struct qeth_query_oat_data)))
            rc = -EFAULT;
    } else
        if (rc == IPA_RC_FFFF)
            rc = -EFAULT;

out_free:
    kfree(priv.buffer);
out:
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_query_oat_command);

static inline int qeth_get_qdio_q_format(struct qeth_card *card)
{
    switch (card->info.type) {
    case QETH_CARD_TYPE_IQD:
        return 2;
    default:
        return 0;
    }
}

static void qeth_determine_capabilities(struct qeth_card *card)
{
    int rc;
    int length;
    char *prcd;
    struct ccw_device *ddev;
    int ddev_offline = 0;

    QETH_DBF_TEXT(SETUP, 2, "detcapab");
    ddev = CARD_DDEV(card);
    if (!ddev->online) {
        ddev_offline = 1;
        rc = ccw_device_set_online(ddev);
        if (rc) {
            QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
            goto out;
        }
    }

    rc = qeth_read_conf_data(card, (void **) &prcd, &length);
    if (rc) {
        QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
            dev_name(&card->gdev->dev), rc);
        QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
        goto out_offline;
    }
    qeth_configure_unitaddr(card, prcd);
    if (ddev_offline)
        qeth_configure_blkt_default(card, prcd);
    kfree(prcd);

    rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
    if (rc)
        QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);

    QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
    QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac1);
    QETH_DBF_TEXT_(SETUP, 2, "%d", card->ssqd.qdioac3);
    QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
    if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
        ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
        ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
        dev_info(&card->gdev->dev,
            "Completion Queueing supported\n");
    } else {
        card->options.cq = QETH_CQ_NOTAVAILABLE;
    }


out_offline:
    if (ddev_offline == 1)
        ccw_device_set_offline(ddev);
out:
    return;
}

static inline void qeth_qdio_establish_cq(struct qeth_card *card,
    struct qdio_buffer **in_sbal_ptrs,
    void (**queue_start_poll) (struct ccw_device *, int, unsigned long)) {
    int i;

    if (card->options.cq == QETH_CQ_ENABLED) {
        int offset = QDIO_MAX_BUFFERS_PER_Q *
                 (card->qdio.no_in_queues - 1);
        i = QDIO_MAX_BUFFERS_PER_Q * (card->qdio.no_in_queues - 1);
        for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
            in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
                virt_to_phys(card->qdio.c_q->bufs[i].buffer);
        }

        queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
    }
}

static int qeth_qdio_establish(struct qeth_card *card)
{
    struct qdio_initialize init_data;
    char *qib_param_field;
    struct qdio_buffer **in_sbal_ptrs;
    void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
    struct qdio_buffer **out_sbal_ptrs;
    int i, j, k;
    int rc = 0;

    QETH_DBF_TEXT(SETUP, 2, "qdioest");

    qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
                  GFP_KERNEL);
    if (!qib_param_field) {
        rc =  -ENOMEM;
        goto out_free_nothing;
    }

    qeth_create_qib_param_field(card, qib_param_field);
    qeth_create_qib_param_field_blkt(card, qib_param_field);

    in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
                   QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
                   GFP_KERNEL);
    if (!in_sbal_ptrs) {
        rc = -ENOMEM;
        goto out_free_qib_param;
    }
    for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
        in_sbal_ptrs[i] = (struct qdio_buffer *)
            virt_to_phys(card->qdio.in_q->bufs[i].buffer);
    }

    queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
                   GFP_KERNEL);
    if (!queue_start_poll) {
        rc = -ENOMEM;
        goto out_free_in_sbals;
    }
    for (i = 0; i < card->qdio.no_in_queues; ++i)
        queue_start_poll[i] = card->discipline->start_poll;

    qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);

    out_sbal_ptrs =
        kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
            sizeof(void *), GFP_KERNEL);
    if (!out_sbal_ptrs) {
        rc = -ENOMEM;
        goto out_free_queue_start_poll;
    }
    for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
            out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
                card->qdio.out_qs[i]->bufs[j]->buffer);
        }

    memset(&init_data, 0, sizeof(struct qdio_initialize));
    init_data.cdev                   = CARD_DDEV(card);
    init_data.q_format               = qeth_get_qdio_q_format(card);
    init_data.qib_param_field_format = 0;
    init_data.qib_param_field        = qib_param_field;
    init_data.no_input_qs            = card->qdio.no_in_queues;
    init_data.no_output_qs           = card->qdio.no_out_queues;
    init_data.input_handler      = card->discipline->input_handler;
    init_data.output_handler     = card->discipline->output_handler;
    init_data.queue_start_poll_array = queue_start_poll;
    init_data.int_parm               = (unsigned long) card;
    init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
    init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
    init_data.output_sbal_state_array = card->qdio.out_bufstates;
    init_data.scan_threshold =
        (card->info.type == QETH_CARD_TYPE_IQD) ? 8 : 32;

    if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
        QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
        rc = qdio_allocate(&init_data);
        if (rc) {
            atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
            goto out;
        }
        rc = qdio_establish(&init_data);
        if (rc) {
            atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
            qdio_free(CARD_DDEV(card));
        }
    }

    switch (card->options.cq) {
    case QETH_CQ_ENABLED:
        dev_info(&card->gdev->dev, "Completion Queue support enabled");
        break;
    case QETH_CQ_DISABLED:
        dev_info(&card->gdev->dev, "Completion Queue support disabled");
        break;
    default:
        break;
    }
out:
    kfree(out_sbal_ptrs);
out_free_queue_start_poll:
    kfree(queue_start_poll);
out_free_in_sbals:
    kfree(in_sbal_ptrs);
out_free_qib_param:
    kfree(qib_param_field);
out_free_nothing:
    return rc;
}

static void qeth_core_free_card(struct qeth_card *card)
{

    QETH_DBF_TEXT(SETUP, 2, "freecrd");
    QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
    qeth_clean_channel(&card->read);
    qeth_clean_channel(&card->write);
    if (card->dev)
        free_netdev(card->dev);
    kfree(card->ip_tbd_list);
    qeth_free_qdio_buffers(card);
    unregister_service_level(&card->qeth_service_level);
    kfree(card);
}

static struct ccw_device_id qeth_ids[] = {
    {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
                    .driver_info = QETH_CARD_TYPE_OSD},
    {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
                    .driver_info = QETH_CARD_TYPE_IQD},
    {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
                    .driver_info = QETH_CARD_TYPE_OSN},
    {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
                    .driver_info = QETH_CARD_TYPE_OSM},
    {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
                    .driver_info = QETH_CARD_TYPE_OSX},
    {},
};
MODULE_DEVICE_TABLE(ccw, qeth_ids);

static struct ccw_driver qeth_ccw_driver = {
    .driver = {
        .owner = THIS_MODULE,
        .name = "qeth",
    },
    .ids = qeth_ids,
    .probe = ccwgroup_probe_ccwdev,
    .remove = ccwgroup_remove_ccwdev,
};

int qeth_core_hardsetup_card(struct qeth_card *card)
{
    int retries = 0;
    int rc;

    QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
    atomic_set(&card->force_alloc_skb, 0);
    qeth_update_from_chp_desc(card);
retry:
    if (retries)
        QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
            dev_name(&card->gdev->dev));
    ccw_device_set_offline(CARD_DDEV(card));
    ccw_device_set_offline(CARD_WDEV(card));
    ccw_device_set_offline(CARD_RDEV(card));
    rc = ccw_device_set_online(CARD_RDEV(card));
    if (rc)
        goto retriable;
    rc = ccw_device_set_online(CARD_WDEV(card));
    if (rc)
        goto retriable;
    rc = ccw_device_set_online(CARD_DDEV(card));
    if (rc)
        goto retriable;
    rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
retriable:
    if (rc == -ERESTARTSYS) {
        QETH_DBF_TEXT(SETUP, 2, "break1");
        return rc;
    } else if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
        if (++retries > 3)
            goto out;
        else
            goto retry;
    }
    qeth_determine_capabilities(card);
    qeth_init_tokens(card);
    qeth_init_func_level(card);
    rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
    if (rc == -ERESTARTSYS) {
        QETH_DBF_TEXT(SETUP, 2, "break2");
        return rc;
    } else if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
        if (--retries < 0)
            goto out;
        else
            goto retry;
    }
    rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
    if (rc == -ERESTARTSYS) {
        QETH_DBF_TEXT(SETUP, 2, "break3");
        return rc;
    } else if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
        if (--retries < 0)
            goto out;
        else
            goto retry;
    }
    card->read_or_write_problem = 0;
    rc = qeth_mpc_initialize(card);
    if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
        goto out;
    }

    card->options.ipa4.supported_funcs = 0;
    card->options.adp.supported_funcs = 0;
    card->info.diagass_support = 0;
    qeth_query_ipassists(card, QETH_PROT_IPV4);
    if (qeth_is_supported(card, IPA_SETADAPTERPARMS))
        qeth_query_setadapterparms(card);
    if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST))
        qeth_query_setdiagass(card);
    return 0;
out:
    dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
        "an error on the device\n");
    QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
        dev_name(&card->gdev->dev), rc);
    return rc;
}
EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);

static inline int qeth_create_skb_frag(struct qeth_qdio_buffer *qethbuffer,
        struct qdio_buffer_element *element,
        struct sk_buff **pskb, int offset, int *pfrag, int data_len)
{
    struct page *page = virt_to_page(element->addr);
    if (*pskb == NULL) {
        if (qethbuffer->rx_skb) {
            /* only if qeth_card.options.cq == QETH_CQ_ENABLED */
            *pskb = qethbuffer->rx_skb;
            qethbuffer->rx_skb = NULL;
        } else {
            *pskb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
            if (!(*pskb))
                return -ENOMEM;
        }

        skb_reserve(*pskb, ETH_HLEN);
        if (data_len <= QETH_RX_PULL_LEN) {
            memcpy(skb_put(*pskb, data_len), element->addr + offset,
                data_len);
        } else {
            get_page(page);
            memcpy(skb_put(*pskb, QETH_RX_PULL_LEN),
                   element->addr + offset, QETH_RX_PULL_LEN);
            skb_fill_page_desc(*pskb, *pfrag, page,
                offset + QETH_RX_PULL_LEN,
                data_len - QETH_RX_PULL_LEN);
            (*pskb)->data_len += data_len - QETH_RX_PULL_LEN;
            (*pskb)->len      += data_len - QETH_RX_PULL_LEN;
            (*pskb)->truesize += data_len - QETH_RX_PULL_LEN;
            (*pfrag)++;
        }
    } else {
        get_page(page);
        skb_fill_page_desc(*pskb, *pfrag, page, offset, data_len);
        (*pskb)->data_len += data_len;
        (*pskb)->len      += data_len;
        (*pskb)->truesize += data_len;
        (*pfrag)++;
    }


    return 0;
}

struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
        struct qeth_qdio_buffer *qethbuffer,
        struct qdio_buffer_element **__element, int *__offset,
        struct qeth_hdr **hdr)
{
    struct qdio_buffer_element *element = *__element;
    struct qdio_buffer *buffer = qethbuffer->buffer;
    int offset = *__offset;
    struct sk_buff *skb = NULL;
    int skb_len = 0;
    void *data_ptr;
    int data_len;
    int headroom = 0;
    int use_rx_sg = 0;
    int frag = 0;

    /* qeth_hdr must not cross element boundaries */
    if (element->length < offset + sizeof(struct qeth_hdr)) {
        if (qeth_is_last_sbale(element))
            return NULL;
        element++;
        offset = 0;
        if (element->length < sizeof(struct qeth_hdr))
            return NULL;
    }
    *hdr = element->addr + offset;

    offset += sizeof(struct qeth_hdr);
    switch ((*hdr)->hdr.l2.id) {
    case QETH_HEADER_TYPE_LAYER2:
        skb_len = (*hdr)->hdr.l2.pkt_length;
        break;
    case QETH_HEADER_TYPE_LAYER3:
        skb_len = (*hdr)->hdr.l3.length;
        headroom = ETH_HLEN;
        break;
    case QETH_HEADER_TYPE_OSN:
        skb_len = (*hdr)->hdr.osn.pdu_length;
        headroom = sizeof(struct qeth_hdr);
        break;
    default:
        break;
    }

    if (!skb_len)
        return NULL;

    if (((skb_len >= card->options.rx_sg_cb) &&
         (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
         (!atomic_read(&card->force_alloc_skb))) ||
        (card->options.cq == QETH_CQ_ENABLED)) {
        use_rx_sg = 1;
    } else {
        skb = dev_alloc_skb(skb_len + headroom);
        if (!skb)
            goto no_mem;
        if (headroom)
            skb_reserve(skb, headroom);
    }

    data_ptr = element->addr + offset;
    while (skb_len) {
        data_len = min(skb_len, (int)(element->length - offset));
        if (data_len) {
            if (use_rx_sg) {
                if (qeth_create_skb_frag(qethbuffer, element,
                    &skb, offset, &frag, data_len))
                    goto no_mem;
            } else {
                memcpy(skb_put(skb, data_len), data_ptr,
                    data_len);
            }
        }
        skb_len -= data_len;
        if (skb_len) {
            if (qeth_is_last_sbale(element)) {
                QETH_CARD_TEXT(card, 4, "unexeob");
                QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
                dev_kfree_skb_any(skb);
                card->stats.rx_errors++;
                return NULL;
            }
            element++;
            offset = 0;
            data_ptr = element->addr;
        } else {
            offset += data_len;
        }
    }
    *__element = element;
    *__offset = offset;
    if (use_rx_sg && card->options.performance_stats) {
        card->perf_stats.sg_skbs_rx++;
        card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
    }
    return skb;
no_mem:
    if (net_ratelimit()) {
        QETH_CARD_TEXT(card, 2, "noskbmem");
    }
    card->stats.rx_dropped++;
    return NULL;
}
EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);

static void qeth_unregister_dbf_views(void)
{
    int x;
    for (x = 0; x < QETH_DBF_INFOS; x++) {
        debug_unregister(qeth_dbf[x].id);
        qeth_dbf[x].id = NULL;
    }
}

void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
{
    char dbf_txt_buf[32];
    va_list args;

    if (level > id->level)
        return;
    va_start(args, fmt);
    vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
    va_end(args);
    debug_text_event(id, level, dbf_txt_buf);
}
EXPORT_SYMBOL_GPL(qeth_dbf_longtext);

static int qeth_register_dbf_views(void)
{
    int ret;
    int x;

    for (x = 0; x < QETH_DBF_INFOS; x++) {
        /* register the areas */
        qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
                        qeth_dbf[x].pages,
                        qeth_dbf[x].areas,
                        qeth_dbf[x].len);
        if (qeth_dbf[x].id == NULL) {
            qeth_unregister_dbf_views();
            return -ENOMEM;
        }

        /* register a view */
        ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
        if (ret) {
            qeth_unregister_dbf_views();
            return ret;
        }

        /* set a passing level */
        debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
    }

    return 0;
}

int qeth_core_load_discipline(struct qeth_card *card,
        enum qeth_discipline_id discipline)
{
    int rc = 0;
    mutex_lock(&qeth_mod_mutex);
    switch (discipline) {
    case QETH_DISCIPLINE_LAYER3:
        card->discipline = try_then_request_module(
            symbol_get(qeth_l3_discipline), "qeth_l3");
        break;
    case QETH_DISCIPLINE_LAYER2:
        card->discipline = try_then_request_module(
            symbol_get(qeth_l2_discipline), "qeth_l2");
        break;
    }
    if (!card->discipline) {
        dev_err(&card->gdev->dev, "There is no kernel module to "
            "support discipline %d\n", discipline);
        rc = -EINVAL;
    }
    mutex_unlock(&qeth_mod_mutex);
    return rc;
}

void qeth_core_free_discipline(struct qeth_card *card)
{
    if (card->options.layer2)
        symbol_put(qeth_l2_discipline);
    else
        symbol_put(qeth_l3_discipline);
    card->discipline = NULL;
}

static const struct device_type qeth_generic_devtype = {
    .name = "qeth_generic",
    .groups = qeth_generic_attr_groups,
};
static const struct device_type qeth_osn_devtype = {
    .name = "qeth_osn",
    .groups = qeth_osn_attr_groups,
};

static int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
    struct qeth_card *card;
    struct device *dev;
    int rc;
    unsigned long flags;
    char dbf_name[20];

    QETH_DBF_TEXT(SETUP, 2, "probedev");

    dev = &gdev->dev;
    if (!get_device(dev))
        return -ENODEV;

    QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));

    card = qeth_alloc_card();
    if (!card) {
        QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
        rc = -ENOMEM;
        goto err_dev;
    }

    snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
        dev_name(&gdev->dev));
    card->debug = debug_register(dbf_name, 2, 1, 8);
    if (!card->debug) {
        QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
        rc = -ENOMEM;
        goto err_card;
    }
    debug_register_view(card->debug, &debug_hex_ascii_view);

    card->read.ccwdev  = gdev->cdev[0];
    card->write.ccwdev = gdev->cdev[1];
    card->data.ccwdev  = gdev->cdev[2];
    dev_set_drvdata(&gdev->dev, card);
    card->gdev = gdev;
    gdev->cdev[0]->handler = qeth_irq;
    gdev->cdev[1]->handler = qeth_irq;
    gdev->cdev[2]->handler = qeth_irq;

    rc = qeth_determine_card_type(card);
    if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
        goto err_dbf;
    }
    rc = qeth_setup_card(card);
    if (rc) {
        QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
        goto err_dbf;
    }

    if (card->info.type == QETH_CARD_TYPE_OSN)
        gdev->dev.type = &qeth_osn_devtype;
    else
        gdev->dev.type = &qeth_generic_devtype;

    switch (card->info.type) {
    case QETH_CARD_TYPE_OSN:
    case QETH_CARD_TYPE_OSM:
        rc = qeth_core_load_discipline(card, QETH_DISCIPLINE_LAYER2);
        if (rc)
            goto err_dbf;
        rc = card->discipline->setup(card->gdev);
        if (rc)
            goto err_disc;
    case QETH_CARD_TYPE_OSD:
    case QETH_CARD_TYPE_OSX:
    default:
        break;
    }

    write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
    list_add_tail(&card->list, &qeth_core_card_list.list);
    write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);

    qeth_determine_capabilities(card);
    return 0;

err_disc:
    qeth_core_free_discipline(card);
err_dbf:
    debug_unregister(card->debug);
err_card:
    qeth_core_free_card(card);
err_dev:
    put_device(dev);
    return rc;
}

static void qeth_core_remove_device(struct ccwgroup_device *gdev)
{
    unsigned long flags;
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);

    QETH_DBF_TEXT(SETUP, 2, "removedv");

    if (card->discipline) {
        card->discipline->remove(gdev);
        qeth_core_free_discipline(card);
    }

    debug_unregister(card->debug);
    write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
    list_del(&card->list);
    write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
    qeth_core_free_card(card);
    dev_set_drvdata(&gdev->dev, NULL);
    put_device(&gdev->dev);
    return;
}

static int qeth_core_set_online(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    int rc = 0;
    int def_discipline;

    if (!card->discipline) {
        if (card->info.type == QETH_CARD_TYPE_IQD)
            def_discipline = QETH_DISCIPLINE_LAYER3;
        else
            def_discipline = QETH_DISCIPLINE_LAYER2;
        rc = qeth_core_load_discipline(card, def_discipline);
        if (rc)
            goto err;
        rc = card->discipline->setup(card->gdev);
        if (rc)
            goto err;
    }
    rc = card->discipline->set_online(gdev);
err:
    return rc;
}

static int qeth_core_set_offline(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    return card->discipline->set_offline(gdev);
}

static void qeth_core_shutdown(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->shutdown)
        card->discipline->shutdown(gdev);
}

static int qeth_core_prepare(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->prepare)
        return card->discipline->prepare(gdev);
    return 0;
}

static void qeth_core_complete(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->complete)
        card->discipline->complete(gdev);
}

static int qeth_core_freeze(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->freeze)
        return card->discipline->freeze(gdev);
    return 0;
}

static int qeth_core_thaw(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->thaw)
        return card->discipline->thaw(gdev);
    return 0;
}

static int qeth_core_restore(struct ccwgroup_device *gdev)
{
    struct qeth_card *card = dev_get_drvdata(&gdev->dev);
    if (card->discipline && card->discipline->restore)
        return card->discipline->restore(gdev);
    return 0;
}

static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
    .driver = {
        .owner = THIS_MODULE,
        .name = "qeth",
    },
    .setup = qeth_core_probe_device,
    .remove = qeth_core_remove_device,
    .set_online = qeth_core_set_online,
    .set_offline = qeth_core_set_offline,
    .shutdown = qeth_core_shutdown,
    .prepare = qeth_core_prepare,
    .complete = qeth_core_complete,
    .freeze = qeth_core_freeze,
    .thaw = qeth_core_thaw,
    .restore = qeth_core_restore,
};

static ssize_t qeth_core_driver_group_store(struct device_driver *ddrv,
                        const char *buf, size_t count)
{
    int err;

    err = ccwgroup_create_dev(qeth_core_root_dev,
                  &qeth_core_ccwgroup_driver, 3, buf);

    return err ? err : count;
}
static DRIVER_ATTR(group, 0200, NULL, qeth_core_driver_group_store);

static struct attribute *qeth_drv_attrs[] = {
    &driver_attr_group.attr,
    NULL,
};
static struct attribute_group qeth_drv_attr_group = {
    .attrs = qeth_drv_attrs,
};
static const struct attribute_group *qeth_drv_attr_groups[] = {
    &qeth_drv_attr_group,
    NULL,
};

static struct {
    const char str[ETH_GSTRING_LEN];
} qeth_ethtool_stats_keys[] = {
/*  0 */{"rx skbs"},
    {"rx buffers"},
    {"tx skbs"},
    {"tx buffers"},
    {"tx skbs no packing"},
    {"tx buffers no packing"},
    {"tx skbs packing"},
    {"tx buffers packing"},
    {"tx sg skbs"},
    {"tx sg frags"},
/* 10 */{"rx sg skbs"},
    {"rx sg frags"},
    {"rx sg page allocs"},
    {"tx large kbytes"},
    {"tx large count"},
    {"tx pk state ch n->p"},
    {"tx pk state ch p->n"},
    {"tx pk watermark low"},
    {"tx pk watermark high"},
    {"queue 0 buffer usage"},
/* 20 */{"queue 1 buffer usage"},
    {"queue 2 buffer usage"},
    {"queue 3 buffer usage"},
    {"rx poll time"},
    {"rx poll count"},
    {"rx do_QDIO time"},
    {"rx do_QDIO count"},
    {"tx handler time"},
    {"tx handler count"},
    {"tx time"},
/* 30 */{"tx count"},
    {"tx do_QDIO time"},
    {"tx do_QDIO count"},
    {"tx csum"},
    {"tx lin"},
    {"cq handler count"},
    {"cq handler time"}
};

int qeth_core_get_sset_count(struct net_device *dev, int stringset)
{
    switch (stringset) {
    case ETH_SS_STATS:
        return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
    default:
        return -EINVAL;
    }
}
EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);

void qeth_core_get_ethtool_stats(struct net_device *dev,
        struct ethtool_stats *stats, u64 *data)
{
    struct qeth_card *card = dev->ml_priv;
    data[0] = card->stats.rx_packets -
                card->perf_stats.initial_rx_packets;
    data[1] = card->perf_stats.bufs_rec;
    data[2] = card->stats.tx_packets -
                card->perf_stats.initial_tx_packets;
    data[3] = card->perf_stats.bufs_sent;
    data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
            - card->perf_stats.skbs_sent_pack;
    data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
    data[6] = card->perf_stats.skbs_sent_pack;
    data[7] = card->perf_stats.bufs_sent_pack;
    data[8] = card->perf_stats.sg_skbs_sent;
    data[9] = card->perf_stats.sg_frags_sent;
    data[10] = card->perf_stats.sg_skbs_rx;
    data[11] = card->perf_stats.sg_frags_rx;
    data[12] = card->perf_stats.sg_alloc_page_rx;
    data[13] = (card->perf_stats.large_send_bytes >> 10);
    data[14] = card->perf_stats.large_send_cnt;
    data[15] = card->perf_stats.sc_dp_p;
    data[16] = card->perf_stats.sc_p_dp;
    data[17] = QETH_LOW_WATERMARK_PACK;
    data[18] = QETH_HIGH_WATERMARK_PACK;
    data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
    data[20] = (card->qdio.no_out_queues > 1) ?
            atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
    data[21] = (card->qdio.no_out_queues > 2) ?
            atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
    data[22] = (card->qdio.no_out_queues > 3) ?
            atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
    data[23] = card->perf_stats.inbound_time;
    data[24] = card->perf_stats.inbound_cnt;
    data[25] = card->perf_stats.inbound_do_qdio_time;
    data[26] = card->perf_stats.inbound_do_qdio_cnt;
    data[27] = card->perf_stats.outbound_handler_time;
    data[28] = card->perf_stats.outbound_handler_cnt;
    data[29] = card->perf_stats.outbound_time;
    data[30] = card->perf_stats.outbound_cnt;
    data[31] = card->perf_stats.outbound_do_qdio_time;
    data[32] = card->perf_stats.outbound_do_qdio_cnt;
    data[33] = card->perf_stats.tx_csum;
    data[34] = card->perf_stats.tx_lin;
    data[35] = card->perf_stats.cq_cnt;
    data[36] = card->perf_stats.cq_time;
}
EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);

void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
    switch (stringset) {
    case ETH_SS_STATS:
        memcpy(data, &qeth_ethtool_stats_keys,
            sizeof(qeth_ethtool_stats_keys));
        break;
    default:
        WARN_ON(1);
        break;
    }
}
EXPORT_SYMBOL_GPL(qeth_core_get_strings);

void qeth_core_get_drvinfo(struct net_device *dev,
        struct ethtool_drvinfo *info)
{
    struct qeth_card *card = dev->ml_priv;
    if (card->options.layer2)
        strcpy(info->driver, "qeth_l2");
    else
        strcpy(info->driver, "qeth_l3");

    strcpy(info->version, "1.0");
    strcpy(info->fw_version, card->info.mcl_level);
    sprintf(info->bus_info, "%s/%s/%s",
            CARD_RDEV_ID(card),
            CARD_WDEV_ID(card),
            CARD_DDEV_ID(card));
}
EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);

int qeth_core_ethtool_get_settings(struct net_device *netdev,
                    struct ethtool_cmd *ecmd)
{
    struct qeth_card *card = netdev->ml_priv;
    enum qeth_link_types link_type;

    if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
        link_type = QETH_LINK_TYPE_10GBIT_ETH;
    else
        link_type = card->info.link_type;

    ecmd->transceiver = XCVR_INTERNAL;
    ecmd->supported = SUPPORTED_Autoneg;
    ecmd->advertising = ADVERTISED_Autoneg;
    ecmd->duplex = DUPLEX_FULL;
    ecmd->autoneg = AUTONEG_ENABLE;

    switch (link_type) {
    case QETH_LINK_TYPE_FAST_ETH:
    case QETH_LINK_TYPE_LANE_ETH100:
        ecmd->supported |= SUPPORTED_10baseT_Half |
                    SUPPORTED_10baseT_Full |
                    SUPPORTED_100baseT_Half |
                    SUPPORTED_100baseT_Full |
                    SUPPORTED_TP;
        ecmd->advertising |= ADVERTISED_10baseT_Half |
                    ADVERTISED_10baseT_Full |
                    ADVERTISED_100baseT_Half |
                    ADVERTISED_100baseT_Full |
                    ADVERTISED_TP;
        ecmd->speed = SPEED_100;
        ecmd->port = PORT_TP;
        break;

    case QETH_LINK_TYPE_GBIT_ETH:
    case QETH_LINK_TYPE_LANE_ETH1000:
        ecmd->supported |= SUPPORTED_10baseT_Half |
                    SUPPORTED_10baseT_Full |
                    SUPPORTED_100baseT_Half |
                    SUPPORTED_100baseT_Full |
                    SUPPORTED_1000baseT_Half |
                    SUPPORTED_1000baseT_Full |
                    SUPPORTED_FIBRE;
        ecmd->advertising |= ADVERTISED_10baseT_Half |
                    ADVERTISED_10baseT_Full |
                    ADVERTISED_100baseT_Half |
                    ADVERTISED_100baseT_Full |
                    ADVERTISED_1000baseT_Half |
                    ADVERTISED_1000baseT_Full |
                    ADVERTISED_FIBRE;
        ecmd->speed = SPEED_1000;
        ecmd->port = PORT_FIBRE;
        break;

    case QETH_LINK_TYPE_10GBIT_ETH:
        ecmd->supported |= SUPPORTED_10baseT_Half |
                    SUPPORTED_10baseT_Full |
                    SUPPORTED_100baseT_Half |
                    SUPPORTED_100baseT_Full |
                    SUPPORTED_1000baseT_Half |
                    SUPPORTED_1000baseT_Full |
                    SUPPORTED_10000baseT_Full |
                    SUPPORTED_FIBRE;
        ecmd->advertising |= ADVERTISED_10baseT_Half |
                    ADVERTISED_10baseT_Full |
                    ADVERTISED_100baseT_Half |
                    ADVERTISED_100baseT_Full |
                    ADVERTISED_1000baseT_Half |
                    ADVERTISED_1000baseT_Full |
                    ADVERTISED_10000baseT_Full |
                    ADVERTISED_FIBRE;
        ecmd->speed = SPEED_10000;
        ecmd->port = PORT_FIBRE;
        break;

    default:
        ecmd->supported |= SUPPORTED_10baseT_Half |
                    SUPPORTED_10baseT_Full |
                    SUPPORTED_TP;
        ecmd->advertising |= ADVERTISED_10baseT_Half |
                    ADVERTISED_10baseT_Full |
                    ADVERTISED_TP;
        ecmd->speed = SPEED_10;
        ecmd->port = PORT_TP;
    }

    return 0;
}
EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_settings);

static int __init qeth_core_init(void)
{
    int rc;

    pr_info("loading core functions\n");
    INIT_LIST_HEAD(&qeth_core_card_list.list);
    rwlock_init(&qeth_core_card_list.rwlock);
    mutex_init(&qeth_mod_mutex);

    rc = qeth_register_dbf_views();
    if (rc)
        goto out_err;
    qeth_core_root_dev = root_device_register("qeth");
    rc = IS_ERR(qeth_core_root_dev) ? PTR_ERR(qeth_core_root_dev) : 0;
    if (rc)
        goto register_err;
    qeth_core_header_cache = kmem_cache_create("qeth_hdr",
            sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
    if (!qeth_core_header_cache) {
        rc = -ENOMEM;
        goto slab_err;
    }
    qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
            sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
    if (!qeth_qdio_outbuf_cache) {
        rc = -ENOMEM;
        goto cqslab_err;
    }
    rc = ccw_driver_register(&qeth_ccw_driver);
    if (rc)
        goto ccw_err;
    qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
    rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
    if (rc)
        goto ccwgroup_err;

    return 0;

ccwgroup_err:
    ccw_driver_unregister(&qeth_ccw_driver);
ccw_err:
    kmem_cache_destroy(qeth_qdio_outbuf_cache);
cqslab_err:
    kmem_cache_destroy(qeth_core_header_cache);
slab_err:
    root_device_unregister(qeth_core_root_dev);
register_err:
    qeth_unregister_dbf_views();
out_err:
    pr_err("Initializing the qeth device driver failed\n");
    return rc;
}

static void __exit qeth_core_exit(void)
{
    ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
    ccw_driver_unregister(&qeth_ccw_driver);
    kmem_cache_destroy(qeth_qdio_outbuf_cache);
    kmem_cache_destroy(qeth_core_header_cache);
    root_device_unregister(qeth_core_root_dev);
    qeth_unregister_dbf_views();
    pr_info("core functions removed\n");
}

module_init(qeth_core_init);
module_exit(qeth_core_exit);
MODULE_AUTHOR("Frank Blaschka <[email protected]>");
MODULE_DESCRIPTION("qeth core functions");
MODULE_LICENSE("GPL");