// SPDX-License-Identifier: GPL-2.0
/*
 *    Copyright IBM Corp. 2007, 2009
 *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
 *               Frank Pavlic <fpavlic@de.ibm.com>,
 *               Thomas Spatzier <tspat@de.ibm.com>,
 *               Frank Blaschka <frank.blaschka@de.ibm.com>
 */

#define pr_fmt(fmt) "qeth: " fmt

#include <linux/export.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/io.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/rcutree.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>

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

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

#include "qeth_core.h"

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

static struct kmem_cache *qeth_core_header_cache;
static struct kmem_cache *qeth_qdio_outbuf_cache;
static struct kmem_cache *qeth_qaob_cache;

static struct device *qeth_core_root_dev;
static struct dentry *qeth_debugfs_root;
static struct lock_class_key qdio_out_skb_queue_key;

static void qeth_issue_next_read_cb(struct qeth_card *card,
                                    struct qeth_cmd_buffer *iob,
                                    unsigned int data_length);
static int qeth_qdio_establish(struct qeth_card *);
static void qeth_free_qdio_queues(struct qeth_card *card);

static const char *qeth_get_cardname(struct qeth_card *card)
{
        if (IS_VM_NIC(card)) {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return " Virtual NIC QDIO";
                case QETH_CARD_TYPE_IQD:
                        return " Virtual NIC Hiper";
                case QETH_CARD_TYPE_OSM:
                        return " Virtual NIC QDIO - OSM";
                case QETH_CARD_TYPE_OSX:
                        return " Virtual NIC QDIO - OSX";
                default:
                        return " unknown";
                }
        } else {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return " OSD Express";
                case QETH_CARD_TYPE_IQD:
                        return " HiperSockets";
                case QETH_CARD_TYPE_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 (IS_VM_NIC(card)) {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        return "Virt.NIC QDIO";
                case QETH_CARD_TYPE_IQD:
                        return "Virt.NIC Hiper";
                case QETH_CARD_TYPE_OSM:
                        return "Virt.NIC OSM";
                case QETH_CARD_TYPE_OSX:
                        return "Virt.NIC OSX";
                default:
                        return "unknown";
                }
        } else {
                switch (card->info.type) {
                case QETH_CARD_TYPE_OSD:
                        switch (card->info.link_type) {
                        case QETH_LINK_TYPE_FAST_ETH:
                                return "OSD_100";
                        case QETH_LINK_TYPE_HSTR:
                                return "HSTR";
                        case QETH_LINK_TYPE_GBIT_ETH:
                                return "OSD_1000";
                        case QETH_LINK_TYPE_10GBIT_ETH:
                                return "OSD_10GIG";
                        case QETH_LINK_TYPE_25GBIT_ETH:
                                return "OSD_25GIG";
                        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_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);

static void qeth_clear_working_pool_list(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *pool_entry, *tmp;
        struct qeth_qdio_q *queue = card->qdio.in_q;
        unsigned int i;

        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);

        for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
                queue->bufs[i].pool_entry = NULL;
}

static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
{
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
                if (entry->elements[i])
                        __free_page(entry->elements[i]);
        }

        kfree(entry);
}

static void qeth_free_buffer_pool(struct qeth_card *card)
{
        struct qeth_buffer_pool_entry *entry, *tmp;

        list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
                                 init_list) {
                list_del(&entry->init_list);
                qeth_free_pool_entry(entry);
        }
}

static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
{
        struct qeth_buffer_pool_entry *entry;
        unsigned int i;

        entry = kzalloc_obj(*entry);
        if (!entry)
                return NULL;

        for (i = 0; i < pages; i++) {
                entry->elements[i] = __dev_alloc_page(GFP_KERNEL);

                if (!entry->elements[i]) {
                        qeth_free_pool_entry(entry);
                        return NULL;
                }
        }

        return entry;
}

static int qeth_alloc_buffer_pool(struct qeth_card *card)
{
        unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
        unsigned int i;

        QETH_CARD_TEXT(card, 5, "alocpool");
        for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
                struct qeth_buffer_pool_entry *entry;

                entry = qeth_alloc_pool_entry(buf_elements);
                if (!entry) {
                        qeth_free_buffer_pool(card);
                        return -ENOMEM;
                }

                list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
        }
        return 0;
}

int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
{
        unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
        struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
        struct qeth_buffer_pool_entry *entry, *tmp;
        int delta = count - pool->buf_count;
        LIST_HEAD(entries);

        QETH_CARD_TEXT(card, 2, "realcbp");

        /* Defer until pool is allocated: */
        if (list_empty(&pool->entry_list))
                goto out;

        /* Remove entries from the pool: */
        while (delta < 0) {
                entry = list_first_entry(&pool->entry_list,
                                         struct qeth_buffer_pool_entry,
                                         init_list);
                list_del(&entry->init_list);
                qeth_free_pool_entry(entry);

                delta++;
        }

        /* Allocate additional entries: */
        while (delta > 0) {
                entry = qeth_alloc_pool_entry(buf_elements);
                if (!entry) {
                        list_for_each_entry_safe(entry, tmp, &entries,
                                                 init_list) {
                                list_del(&entry->init_list);
                                qeth_free_pool_entry(entry);
                        }

                        return -ENOMEM;
                }

                list_add(&entry->init_list, &entries);

                delta--;
        }

        list_splice(&entries, &pool->entry_list);

out:
        card->qdio.in_buf_pool.buf_count = count;
        pool->buf_count = count;
        return 0;
}
EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);

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

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

static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
{
        struct qeth_qdio_q *q = kzalloc_obj(*q);
        int i;

        if (!q)
                return NULL;

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

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

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

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

        if (card->options.cq == QETH_CQ_ENABLED) {
                QETH_CARD_TEXT(card, 2, "cqinit");
                qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
                                   QDIO_MAX_BUFFERS_PER_Q);
                card->qdio.c_q->next_buf_to_init = 127;

                rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
                if (rc) {
                        QETH_CARD_TEXT_(card, 2, "1err%d", rc);
                        goto out;
                }
        }
        rc = 0;
out:
        return rc;
}

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

static int qeth_alloc_cq(struct qeth_card *card)
{
        if (card->options.cq == QETH_CQ_ENABLED) {
                QETH_CARD_TEXT(card, 2, "cqon");
                if (!card->qdio.c_q) {
                        card->qdio.c_q = qeth_alloc_qdio_queue();
                        if (!card->qdio.c_q) {
                                dev_err(&card->gdev->dev,
                                        "Failed to create completion queue\n");
                                return -ENOMEM;
                        }
                }
        } else {
                QETH_CARD_TEXT(card, 2, "nocq");
                qeth_free_cq(card);
        }
        return 0;
}

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

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

        return n;
}

static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
{
        if (refcount_dec_and_test(&iob->ref_count)) {
                kfree(iob->data);
                kfree(iob);
        }
}
static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
                           void *data)
{
        ccw->cmd_code = cmd_code;
        ccw->flags = flags | CCW_FLAG_SLI;
        ccw->count = len;
        ccw->cda = virt_to_dma32(data);
}

static int __qeth_issue_next_read(struct qeth_card *card)
{
        struct qeth_cmd_buffer *iob = card->read_cmd;
        struct qeth_channel *channel = iob->channel;
        struct ccw1 *ccw = __ccw_from_cmd(iob);
        int rc;

        QETH_CARD_TEXT(card, 5, "issnxrd");
        if (channel->state != CH_STATE_UP)
                return -EIO;

        memset(iob->data, 0, iob->length);
        qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
        iob->callback = qeth_issue_next_read_cb;
        /* keep the cmd alive after completion: */
        qeth_get_cmd(iob);

        QETH_CARD_TEXT(card, 6, "noirqpnd");
        rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
        if (!rc) {
                channel->active_cmd = iob;
        } else {
                QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
                                 rc, CARD_DEVID(card));
                qeth_unlock_channel(card, channel);
                qeth_put_cmd(iob);
                card->read_or_write_problem = 1;
                qeth_schedule_recovery(card);
        }
        return rc;
}

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

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

        return ret;
}

static void qeth_enqueue_cmd(struct qeth_card *card,
                             struct qeth_cmd_buffer *iob)
{
        spin_lock_irq(&card->lock);
        list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
        spin_unlock_irq(&card->lock);
}

static void qeth_dequeue_cmd(struct qeth_card *card,
                             struct qeth_cmd_buffer *iob)
{
        spin_lock_irq(&card->lock);
        list_del(&iob->list_entry);
        spin_unlock_irq(&card->lock);
}

static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
{
        iob->rc = reason;
        complete(&iob->done);
}

static void qeth_flush_local_addrs4(struct qeth_card *card)
{
        struct qeth_local_addr *addr;
        struct hlist_node *tmp;
        unsigned int i;

        spin_lock_irq(&card->local_addrs4_lock);
        hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
                hash_del_rcu(&addr->hnode);
                kfree_rcu(addr, rcu);
        }
        spin_unlock_irq(&card->local_addrs4_lock);
}

static void qeth_flush_local_addrs6(struct qeth_card *card)
{
        struct qeth_local_addr *addr;
        struct hlist_node *tmp;
        unsigned int i;

        spin_lock_irq(&card->local_addrs6_lock);
        hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
                hash_del_rcu(&addr->hnode);
                kfree_rcu(addr, rcu);
        }
        spin_unlock_irq(&card->local_addrs6_lock);
}

static void qeth_flush_local_addrs(struct qeth_card *card)
{
        qeth_flush_local_addrs4(card);
        qeth_flush_local_addrs6(card);
}

static void qeth_add_local_addrs4(struct qeth_card *card,
                                  struct qeth_ipacmd_local_addrs4 *cmd)
{
        unsigned int i;

        if (cmd->addr_length !=
            sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
                dev_err_ratelimited(&card->gdev->dev,
                                    "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
                                    cmd->addr_length);
                return;
        }

        spin_lock(&card->local_addrs4_lock);
        for (i = 0; i < cmd->count; i++) {
                unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
                struct qeth_local_addr *addr;
                bool duplicate = false;

                hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
                        if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
                                duplicate = true;
                                break;
                        }
                }

                if (duplicate)
                        continue;

                addr = kmalloc_obj(*addr, GFP_ATOMIC);
                if (!addr) {
                        dev_err(&card->gdev->dev,
                                "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
                                &cmd->addrs[i].addr);
                        continue;
                }

                ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
                hash_add_rcu(card->local_addrs4, &addr->hnode, key);
        }
        spin_unlock(&card->local_addrs4_lock);
}

static void qeth_add_local_addrs6(struct qeth_card *card,
                                  struct qeth_ipacmd_local_addrs6 *cmd)
{
        unsigned int i;

        if (cmd->addr_length !=
            sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
                dev_err_ratelimited(&card->gdev->dev,
                                    "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
                                    cmd->addr_length);
                return;
        }

        spin_lock(&card->local_addrs6_lock);
        for (i = 0; i < cmd->count; i++) {
                u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
                struct qeth_local_addr *addr;
                bool duplicate = false;

                hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
                        if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
                                duplicate = true;
                                break;
                        }
                }

                if (duplicate)
                        continue;

                addr = kmalloc_obj(*addr, GFP_ATOMIC);
                if (!addr) {
                        dev_err(&card->gdev->dev,
                                "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
                                &cmd->addrs[i].addr);
                        continue;
                }

                addr->addr = cmd->addrs[i].addr;
                hash_add_rcu(card->local_addrs6, &addr->hnode, key);
        }
        spin_unlock(&card->local_addrs6_lock);
}

static void qeth_del_local_addrs4(struct qeth_card *card,
                                  struct qeth_ipacmd_local_addrs4 *cmd)
{
        unsigned int i;

        if (cmd->addr_length !=
            sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
                dev_err_ratelimited(&card->gdev->dev,
                                    "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
                                    cmd->addr_length);
                return;
        }

        spin_lock(&card->local_addrs4_lock);
        for (i = 0; i < cmd->count; i++) {
                struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
                unsigned int key = ipv4_addr_hash(addr->addr);
                struct qeth_local_addr *tmp;

                hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
                        if (tmp->addr.s6_addr32[3] == addr->addr) {
                                hash_del_rcu(&tmp->hnode);
                                kfree_rcu(tmp, rcu);
                                break;
                        }
                }
        }
        spin_unlock(&card->local_addrs4_lock);
}

static void qeth_del_local_addrs6(struct qeth_card *card,
                                  struct qeth_ipacmd_local_addrs6 *cmd)
{
        unsigned int i;

        if (cmd->addr_length !=
            sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
                dev_err_ratelimited(&card->gdev->dev,
                                    "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
                                    cmd->addr_length);
                return;
        }

        spin_lock(&card->local_addrs6_lock);
        for (i = 0; i < cmd->count; i++) {
                struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
                u32 key = ipv6_addr_hash(&addr->addr);
                struct qeth_local_addr *tmp;

                hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
                        if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
                                hash_del_rcu(&tmp->hnode);
                                kfree_rcu(tmp, rcu);
                                break;
                        }
                }
        }
        spin_unlock(&card->local_addrs6_lock);
}

static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
                                      struct sk_buff *skb)
{
        struct qeth_local_addr *tmp;
        bool is_local = false;
        unsigned int key;
        __be32 next_hop;

        if (hash_empty(card->local_addrs4))
                return false;

        rcu_read_lock();
        next_hop = qeth_next_hop_v4_rcu(skb,
                                        qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
        key = ipv4_addr_hash(next_hop);

        hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
                if (tmp->addr.s6_addr32[3] == next_hop) {
                        is_local = true;
                        break;
                }
        }
        rcu_read_unlock();

        return is_local;
}

static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
                                      struct sk_buff *skb)
{
        struct qeth_local_addr *tmp;
        struct in6_addr *next_hop;
        bool is_local = false;
        u32 key;

        if (hash_empty(card->local_addrs6))
                return false;

        rcu_read_lock();
        next_hop = qeth_next_hop_v6_rcu(skb,
                                        qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
        key = ipv6_addr_hash(next_hop);

        hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
                if (ipv6_addr_equal(&tmp->addr, next_hop)) {
                        is_local = true;
                        break;
                }
        }
        rcu_read_unlock();

        return is_local;
}

static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
{
        struct qeth_card *card = m->private;
        struct qeth_local_addr *tmp;
        unsigned int i;

        rcu_read_lock();
        hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
                seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
        hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
                seq_printf(m, "%pI6c\n", &tmp->addr);
        rcu_read_unlock();

        return 0;
}

DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);

static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
                struct qeth_card *card)
{
        const 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) for device %x returned %#x \"%s\"\n",
                                 ipa_name, com, CARD_DEVID(card), rc,
                                 qeth_get_ipa_msg(com, rc));
        else
                QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
                                 ipa_name, com, CARD_DEVID(card));
}

static void qeth_default_link_info(struct qeth_card *card)
{
        struct qeth_link_info *link_info = &card->info.link_info;

        QETH_CARD_TEXT(card, 2, "dftlinfo");
        link_info->duplex = DUPLEX_FULL;

        if (IS_IQD(card) || IS_VM_NIC(card)) {
                link_info->speed = SPEED_10000;
                link_info->port = PORT_FIBRE;
                link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
        } else {
                switch (card->info.link_type) {
                case QETH_LINK_TYPE_FAST_ETH:
                case QETH_LINK_TYPE_LANE_ETH100:
                        link_info->speed = SPEED_100;
                        link_info->port = PORT_TP;
                        break;
                case QETH_LINK_TYPE_GBIT_ETH:
                case QETH_LINK_TYPE_LANE_ETH1000:
                        link_info->speed = SPEED_1000;
                        link_info->port = PORT_FIBRE;
                        break;
                case QETH_LINK_TYPE_10GBIT_ETH:
                        link_info->speed = SPEED_10000;
                        link_info->port = PORT_FIBRE;
                        break;
                case QETH_LINK_TYPE_25GBIT_ETH:
                        link_info->speed = SPEED_25000;
                        link_info->port = PORT_FIBRE;
                        break;
                default:
                        dev_info(&card->gdev->dev,
                                 "Unknown link type %x\n",
                                 card->info.link_type);
                        link_info->speed = SPEED_UNKNOWN;
                        link_info->port = PORT_OTHER;
                }

                link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
        }
}

static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
                                                struct qeth_ipa_cmd *cmd)
{
        QETH_CARD_TEXT(card, 5, "chkipad");

        if (IS_IPA_REPLY(cmd)) {
                if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
                        qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
                return cmd;
        }

        /* handle unsolicited event: */
        switch (cmd->hdr.command) {
        case IPA_CMD_STOPLAN:
                if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
                        dev_err(&card->gdev->dev,
                                "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
                                netdev_name(card->dev));
                        /* Set offline, then probably fail to set online: */
                        qeth_schedule_recovery(card);
                } else {
                        /* stay online for subsequent STARTLAN */
                        dev_warn(&card->gdev->dev,
                                 "The link for interface %s on CHPID 0x%X failed\n",
                                 netdev_name(card->dev), card->info.chpid);
                        qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
                        netif_carrier_off(card->dev);
                        qeth_default_link_info(card);
                }
                return NULL;
        case IPA_CMD_STARTLAN:
                dev_info(&card->gdev->dev,
                         "The link for %s on CHPID 0x%X has been restored\n",
                         netdev_name(card->dev), card->info.chpid);
                if (card->info.hwtrap)
                        card->info.hwtrap = 2;
                qeth_schedule_recovery(card);
                return NULL;
        case IPA_CMD_SETBRIDGEPORT_IQD:
        case IPA_CMD_SETBRIDGEPORT_OSA:
        case IPA_CMD_ADDRESS_CHANGE_NOTIF:
                if (card->discipline->control_event_handler(card, cmd))
                        return cmd;
                return NULL;
        case IPA_CMD_REGISTER_LOCAL_ADDR:
                if (cmd->hdr.prot_version == QETH_PROT_IPV4)
                        qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
                else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
                        qeth_add_local_addrs6(card, &cmd->data.local_addrs6);

                QETH_CARD_TEXT(card, 3, "irla");
                return NULL;
        case IPA_CMD_UNREGISTER_LOCAL_ADDR:
                if (cmd->hdr.prot_version == QETH_PROT_IPV4)
                        qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
                else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
                        qeth_del_local_addrs6(card, &cmd->data.local_addrs6);

                QETH_CARD_TEXT(card, 3, "urla");
                return NULL;
        default:
                QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
                return cmd;
        }
}

static void qeth_clear_ipacmd_list(struct qeth_card *card)
{
        struct qeth_cmd_buffer *iob;
        unsigned long flags;

        QETH_CARD_TEXT(card, 4, "clipalst");

        spin_lock_irqsave(&card->lock, flags);
        list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
                qeth_notify_cmd(iob, -ECANCELED);
        spin_unlock_irqrestore(&card->lock, flags);
}

static int qeth_check_idx_response(struct qeth_card *card,
        unsigned char *buffer)
{
        QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
        if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
                QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
                                 buffer[4]);
                QETH_CARD_TEXT(card, 2, "ckidxres");
                QETH_CARD_TEXT(card, 2, " idxterm");
                QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
                if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
                    buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
                        dev_err(&card->gdev->dev,
                                "The device does not support the configured transport mode\n");
                        return -EPROTONOSUPPORT;
                }
                return -EIO;
        }
        return 0;
}

static void qeth_release_buffer_cb(struct qeth_card *card,
                                   struct qeth_cmd_buffer *iob,
                                   unsigned int data_length)
{
        qeth_put_cmd(iob);
}

static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
{
        qeth_notify_cmd(iob, rc);
        qeth_put_cmd(iob);
}

static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
                                              unsigned int length,
                                              unsigned int ccws, long timeout)
{
        struct qeth_cmd_buffer *iob;

        if (length > QETH_BUFSIZE)
                return NULL;

        iob = kzalloc_obj(*iob);
        if (!iob)
                return NULL;

        iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
                            GFP_KERNEL | GFP_DMA);
        if (!iob->data) {
                kfree(iob);
                return NULL;
        }

        init_completion(&iob->done);
        spin_lock_init(&iob->lock);
        refcount_set(&iob->ref_count, 1);
        iob->channel = channel;
        iob->timeout = timeout;
        iob->length = length;
        return iob;
}

static void qeth_issue_next_read_cb(struct qeth_card *card,
                                    struct qeth_cmd_buffer *iob,
                                    unsigned int data_length)
{
        struct qeth_cmd_buffer *request = NULL;
        struct qeth_ipa_cmd *cmd = NULL;
        struct qeth_reply *reply = NULL;
        struct qeth_cmd_buffer *tmp;
        unsigned long flags;
        int rc = 0;

        QETH_CARD_TEXT(card, 4, "sndctlcb");
        rc = qeth_check_idx_response(card, iob->data);
        switch (rc) {
        case 0:
                break;
        case -EIO:
                qeth_schedule_recovery(card);
                fallthrough;
        default:
                qeth_clear_ipacmd_list(card);
                goto err_idx;
        }

        cmd = __ipa_reply(iob);
        if (cmd) {
                cmd = qeth_check_ipa_data(card, cmd);
                if (!cmd)
                        goto out;
        }

        /* match against pending cmd requests */
        spin_lock_irqsave(&card->lock, flags);
        list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
                if (tmp->match && tmp->match(tmp, iob)) {
                        request = tmp;
                        /* take the object outside the lock */
                        qeth_get_cmd(request);
                        break;
                }
        }
        spin_unlock_irqrestore(&card->lock, flags);

        if (!request)
                goto out;

        reply = &request->reply;
        if (!reply->callback) {
                rc = 0;
                goto no_callback;
        }

        spin_lock_irqsave(&request->lock, flags);
        if (request->rc)
                /* Bail out when the requestor has already left: */
                rc = request->rc;
        else
                rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
                                                        (unsigned long)iob);
        spin_unlock_irqrestore(&request->lock, flags);

no_callback:
        if (rc <= 0)
                qeth_notify_cmd(request, rc);
        qeth_put_cmd(request);
out:
        memcpy(&card->seqno.pdu_hdr_ack,
                QETH_PDU_HEADER_SEQ_NO(iob->data),
                QETH_SEQ_NO_LENGTH);
        __qeth_issue_next_read(card);
err_idx:
        qeth_put_cmd(iob);
}

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

        spin_lock_irqsave(&card->thread_mask_lock, flags);
        if (!(card->thread_allowed_mask & thread))
                rc = -EPERM;
        else if (card->thread_start_mask & thread)
                rc = -EBUSY;
        else
                card->thread_start_mask |= thread;
        spin_unlock_irqrestore(&card->thread_mask_lock, flags);

        return rc;
}

static 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);
}

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

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

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;
}

static 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;
}

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

        QETH_CARD_TEXT(card, 2, "startrec");

        rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
        if (!rc)
                schedule_work(&card->kernel_thread_starter);

        return rc;
}

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

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

        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, "check on channel %x with dstat=%#x, cstat=%#x\n",
                                 CCW_DEVID(cdev), dstat, cstat);
                print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
                                16, 1, irb, 64, 1);
                return -EIO;
        }

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

static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
                                struct irb *irb)
{
        if (!IS_ERR(irb))
                return 0;

        switch (PTR_ERR(irb)) {
        case -EIO:
                QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
                                 CCW_DEVID(cdev));
                QETH_CARD_TEXT(card, 2, "ckirberr");
                QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
                return -EIO;
        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);
                return -ETIMEDOUT;
        default:
                QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
                                 PTR_ERR(irb), CCW_DEVID(cdev));
                QETH_CARD_TEXT(card, 2, "ckirberr");
                QETH_CARD_TEXT(card, 2, "  rc???");
                return PTR_ERR(irb);
        }
}

/**
 * qeth_irq() - qeth interrupt handler
 * @cdev: ccw device
 * @intparm: expect pointer to iob
 * @irb: Interruption Response Block
 *
 * In the good path:
 * corresponding qeth channel is locked with last used iob as active_cmd.
 * But this function is also called for error interrupts.
 *
 * Caller ensures that:
 * Interrupts are disabled; ccw device lock is held;
 *
 */
static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
                struct irb *irb)
{
        int rc;
        int cstat, dstat;
        struct qeth_cmd_buffer *iob = NULL;
        struct ccwgroup_device *gdev;
        struct qeth_channel *channel;
        struct qeth_card *card;

        /* while we hold the ccwdev lock, this stays valid: */
        gdev = dev_get_drvdata(&cdev->dev);
        card = dev_get_drvdata(&gdev->dev);

        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");
        }

        if (intparm == 0) {
                QETH_CARD_TEXT(card, 5, "irqunsol");
        } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
                QETH_CARD_TEXT(card, 5, "irqunexp");

                dev_err(&cdev->dev,
                        "Received IRQ with intparm %lx, expected %px\n",
                        intparm, channel->active_cmd);
                if (channel->active_cmd)
                        qeth_cancel_cmd(channel->active_cmd, -EIO);
        } else {
                iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
        }

        rc = qeth_check_irb_error(card, cdev, irb);
        if (rc) {
                /* IO was terminated, free its resources. */
                qeth_unlock_channel(card, channel);
                if (iob)
                        qeth_cancel_cmd(iob, rc);
                return;
        }

        if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
                channel->state = CH_STATE_STOPPED;
                wake_up(&card->wait_q);
        }

        if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
                channel->state = CH_STATE_HALTED;
                wake_up(&card->wait_q);
        }

        if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
                                          SCSW_FCTL_HALT_FUNC))) {
                qeth_cancel_cmd(iob, -ECANCELED);
                iob = NULL;
        }

        cstat = irb->scsw.cmd.cstat;
        dstat = irb->scsw.cmd.dstat;

        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, "sense data available on channel %x: cstat %#X dstat %#X\n",
                                         CCW_DEVID(channel->ccwdev), 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);
                }

                rc = qeth_get_problem(card, cdev, irb);
                if (rc) {
                        card->read_or_write_problem = 1;
                        qeth_unlock_channel(card, channel);
                        if (iob)
                                qeth_cancel_cmd(iob, rc);
                        qeth_clear_ipacmd_list(card);
                        qeth_schedule_recovery(card);
                        return;
                }
        }

        if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) {
                /* channel command hasn't started: retry.
                 * active_cmd is still set to last iob
                 */
                QETH_CARD_TEXT(card, 2, "irqcc1");
                rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob),
                                              (addr_t)iob, 0, 0, iob->timeout);
                if (rc) {
                        QETH_DBF_MESSAGE(2,
                                         "ccw retry on %x failed, rc = %i\n",
                                         CARD_DEVID(card), rc);
                        QETH_CARD_TEXT_(card, 2, " err%d", rc);
                        qeth_unlock_channel(card, channel);
                        qeth_cancel_cmd(iob, rc);
                }
                return;
        }

        qeth_unlock_channel(card, channel);

        if (iob) {
                /* sanity check: */
                if (irb->scsw.cmd.count > iob->length) {
                        qeth_cancel_cmd(iob, -EIO);
                        return;
                }
                if (iob->callback)
                        iob->callback(card, iob,
                                      iob->length - irb->scsw.cmd.count);
        }
}

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;

        skb_queue_walk(&buf->skb_list, skb) {
                struct sock *sk = skb->sk;

                QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
                QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
                if (sk && sk->sk_family == PF_IUCV)
                        iucv_sk(sk)->sk_txnotify(sk, notification);
        }
}

static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
                                 struct qeth_qdio_out_buffer *buf, bool error,
                                 int budget)
{
        struct sk_buff *skb;

        /* Empty buffer? */
        if (buf->next_element_to_fill == 0)
                return;

        QETH_TXQ_STAT_INC(queue, bufs);
        QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
        if (error) {
                QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
        } else {
                QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
                QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
        }

        while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
                unsigned int bytes = qdisc_pkt_len(skb);
                bool is_tso = skb_is_gso(skb);
                unsigned int packets;

                packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
                if (!error) {
                        if (skb->ip_summed == CHECKSUM_PARTIAL)
                                QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
                        if (skb_is_nonlinear(skb))
                                QETH_TXQ_STAT_INC(queue, skbs_sg);
                        if (is_tso) {
                                QETH_TXQ_STAT_INC(queue, skbs_tso);
                                QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
                        }
                }

                napi_consume_skb(skb, budget);
        }
}

static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
                                     struct qeth_qdio_out_buffer *buf,
                                     bool error, int budget)
{
        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);
                QETH_TXQ_STAT_INC(queue, completion_irq);
        }

        qeth_tx_complete_buf(queue, buf, error, budget);

        for (i = 0; i < queue->max_elements; ++i) {
                void *data = dma64_to_virt(buf->buffer->element[i].addr);

                if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
                        kmem_cache_free(qeth_core_header_cache, data);
        }

        qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
        buf->next_element_to_fill = 0;
        buf->frames = 0;
        buf->bytes = 0;
        atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
}

static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
{
        if (buf->aob)
                kmem_cache_free(qeth_qaob_cache, buf->aob);
        kmem_cache_free(qeth_qdio_outbuf_cache, buf);
}

static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
                                          struct qeth_qdio_out_q *queue,
                                          bool drain, int budget)
{
        struct qeth_qdio_out_buffer *buf, *tmp;

        list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
                struct qeth_qaob_priv1 *priv;
                struct qaob *aob = buf->aob;
                enum iucv_tx_notify notify;
                unsigned int i;

                priv = (struct qeth_qaob_priv1 *)&aob->user1;
                if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
                        QETH_CARD_TEXT(card, 5, "fp");
                        QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);

                        notify = drain ? TX_NOTIFY_GENERALERROR :
                                         qeth_compute_cq_notification(aob->aorc, 1);
                        qeth_notify_skbs(queue, buf, notify);
                        qeth_tx_complete_buf(queue, buf, drain, budget);

                        for (i = 0;
                             i < aob->sb_count && i < queue->max_elements;
                             i++) {
                                void *data = dma64_to_virt(aob->sba[i]);

                                if (test_bit(i, buf->from_kmem_cache) && data)
                                        kmem_cache_free(qeth_core_header_cache,
                                                        data);
                        }

                        list_del(&buf->list_entry);
                        qeth_free_out_buf(buf);
                }
        }
}

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

        qeth_tx_complete_pending_bufs(q->card, q, true, 0);

        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                if (!q->bufs[j])
                        continue;

                qeth_clear_output_buffer(q, q->bufs[j], true, 0);
                if (free) {
                        qeth_free_out_buf(q->bufs[j]);
                        q->bufs[j] = NULL;
                }
        }
}

static void qeth_drain_output_queues(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_drain_output_queue(card->qdio.out_qs[i], false);
        }
}

static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
{
        unsigned int max = single ? 1 : card->dev->num_tx_queues;

        if (card->qdio.no_out_queues == max)
                return;

        if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
                qeth_free_qdio_queues(card);

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

        card->qdio.no_out_queues = max;
}

static int qeth_update_from_chp_desc(struct qeth_card *card)
{
        struct ccw_device *ccwdev;
        struct channel_path_desc_fmt0 *chp_dsc;

        QETH_CARD_TEXT(card, 2, "chp_desc");

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

        card->info.func_level = 0x4100 + chp_dsc->desc;

        if (IS_OSD(card) || IS_OSX(card))
                /* CHPP field bit 6 == 1 -> single queue */
                qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);

        kfree(chp_dsc);
        QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
        QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
        return 0;
}

static void qeth_init_qdio_info(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 4, "intqdinf");
        atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
        card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
        card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;

        /* inbound */
        card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
        if (IS_IQD(card))
                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_initial_options(struct qeth_card *card)
{
        card->options.route4.type = NO_ROUTER;
        card->options.route6.type = NO_ROUTER;
        card->options.isolation = ISOLATION_MODE_NONE;
        card->options.cq = QETH_CQ_DISABLED;
        card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
}

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 int qeth_do_reset(void *data);
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(qeth_do_reset, card, "qeth_recover");
                if (IS_ERR(ts)) {
                        qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
                        qeth_clear_thread_running_bit(card,
                                QETH_RECOVER_THREAD);
                }
        }
}

static void qeth_buffer_reclaim_work(struct work_struct *);
static void qeth_setup_card(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "setupcrd");

        card->info.type = CARD_RDEV(card)->id.driver_info;
        card->state = CARD_STATE_DOWN;
        spin_lock_init(&card->lock);
        spin_lock_init(&card->thread_mask_lock);
        mutex_init(&card->conf_mutex);
        mutex_init(&card->discipline_mutex);
        INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
        INIT_LIST_HEAD(&card->cmd_waiter_list);
        init_waitqueue_head(&card->wait_q);
        qeth_set_initial_options(card);
        /* IP address takeover */
        INIT_LIST_HEAD(&card->ipato.entries);
        qeth_init_qdio_info(card);
        INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
        hash_init(card->rx_mode_addrs);
        hash_init(card->local_addrs4);
        hash_init(card->local_addrs6);
        spin_lock_init(&card->local_addrs4_lock);
        spin_lock_init(&card->local_addrs6_lock);
}

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(struct ccwgroup_device *gdev)
{
        struct qeth_card *card;

        QETH_DBF_TEXT(SETUP, 2, "alloccrd");
        card = kzalloc_obj(*card);
        if (!card)
                goto out;
        QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));

        card->gdev = gdev;
        dev_set_drvdata(&gdev->dev, card);
        CARD_RDEV(card) = gdev->cdev[0];
        CARD_WDEV(card) = gdev->cdev[1];
        CARD_DDEV(card) = gdev->cdev[2];

        card->event_wq = alloc_ordered_workqueue("%s_event", 0,
                                                 dev_name(&gdev->dev));
        if (!card->event_wq)
                goto out_wq;

        card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
        if (!card->read_cmd)
                goto out_read_cmd;

        card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
                                           qeth_debugfs_root);
        debugfs_create_file("local_addrs", 0400, card->debugfs, card,
                            &qeth_debugfs_local_addr_fops);

        card->qeth_service_level.seq_print = qeth_core_sl_print;
        register_service_level(&card->qeth_service_level);
        return card;

out_read_cmd:
        destroy_workqueue(card->event_wq);
out_wq:
        dev_set_drvdata(&gdev->dev, NULL);
        kfree(card);
out:
        return NULL;
}

static int qeth_clear_channel(struct qeth_card *card,
                              struct qeth_channel *channel)
{
        int rc;

        QETH_CARD_TEXT(card, 3, "clearch");
        spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
        rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
        spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));

        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_card *card,
                             struct qeth_channel *channel)
{
        int rc;

        QETH_CARD_TEXT(card, 3, "haltch");
        spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
        rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
        spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));

        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_stop_channel(struct qeth_channel *channel)
{
        struct ccw_device *cdev = channel->ccwdev;
        int rc;

        rc = ccw_device_set_offline(cdev);

        spin_lock_irq(get_ccwdev_lock(cdev));
        if (channel->active_cmd)
                dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
                        channel->active_cmd);

        cdev->handler = NULL;
        spin_unlock_irq(get_ccwdev_lock(cdev));

        return rc;
}

static int qeth_start_channel(struct qeth_channel *channel)
{
        struct ccw_device *cdev = channel->ccwdev;
        int rc;

        channel->state = CH_STATE_DOWN;
        xchg(&channel->active_cmd, NULL);

        spin_lock_irq(get_ccwdev_lock(cdev));
        cdev->handler = qeth_irq;
        spin_unlock_irq(get_ccwdev_lock(cdev));

        rc = ccw_device_set_online(cdev);
        if (rc)
                goto err;

        return 0;

err:
        spin_lock_irq(get_ccwdev_lock(cdev));
        cdev->handler = NULL;
        spin_unlock_irq(get_ccwdev_lock(cdev));
        return rc;
}

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, &card->read);
        rc2 = qeth_halt_channel(card, &card->write);
        rc3 = qeth_halt_channel(card, &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, &card->read);
        rc2 = qeth_clear_channel(card, &card->write);
        rc3 = qeth_clear_channel(card, &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);
}

static 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 (IS_IQD(card))
                        rc = qdio_shutdown(CARD_DDEV(card),
                                QDIO_FLAG_CLEANUP_USING_HALT);
                else
                        rc = qdio_shutdown(CARD_DDEV(card),
                                QDIO_FLAG_CLEANUP_USING_CLEAR);
                if (rc)
                        QETH_CARD_TEXT_(card, 3, "1err%d", rc);
                atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
                break;
        case QETH_QDIO_CLEANING:
                return rc;
        default:
                break;
        }
        rc = qeth_clear_halt_card(card, use_halt);
        if (rc)
                QETH_CARD_TEXT_(card, 3, "2err%d", rc);
        return rc;
}

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

        QETH_CARD_TEXT(card, 2, "vmlayer");

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

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

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

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

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

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

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

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

        if (IS_OSM(card))
                disc = QETH_DISCIPLINE_LAYER2;
        else if (IS_VM_NIC(card))
                disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
                                      qeth_vm_detect_layer(card);

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

        return disc;
}

static void qeth_set_blkt_defaults(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "cfgblkt");

        if (card->info.use_v1_blkt) {
                card->info.blkt.time_total = 0;
                card->info.blkt.inter_packet = 0;
                card->info.blkt.inter_packet_jumbo = 0;
        } else {
                card->info.blkt.time_total = 250;
                card->info.blkt.inter_packet = 5;
                card->info.blkt.inter_packet_jumbo = 15;
        }
}

static void qeth_idx_init(struct qeth_card *card)
{
        memset(&card->seqno, 0, sizeof(card->seqno));

        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;

        switch (card->info.type) {
        case QETH_CARD_TYPE_IQD:
                card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
                break;
        case QETH_CARD_TYPE_OSD:
                card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
                break;
        default:
                break;
        }
}

static void qeth_idx_finalize_cmd(struct qeth_card *card,
                                  struct qeth_cmd_buffer *iob)
{
        memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
               QETH_SEQ_NO_LENGTH);
        if (iob->channel == &card->write)
                card->seqno.trans_hdr++;
}

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_mpc_finalize_cmd(struct qeth_card *card,
                                  struct qeth_cmd_buffer *iob)
{
        qeth_idx_finalize_cmd(card, iob);

        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);

        iob->callback = qeth_release_buffer_cb;
}

static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
                                 struct qeth_cmd_buffer *reply)
{
        /* MPC cmds are issued strictly in sequence. */
        return !IS_IPA(reply->data);
}

static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
                                                  const void *data,
                                                  unsigned int data_length)
{
        struct qeth_cmd_buffer *iob;

        iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
        if (!iob)
                return NULL;

        memcpy(iob->data, data, data_length);
        qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
                       iob->data);
        iob->finalize = qeth_mpc_finalize_cmd;
        iob->match = qeth_mpc_match_reply;
        return iob;
}

/**
 * qeth_send_control_data() -   send control command to the card
 * @card:                       qeth_card structure pointer
 * @iob:                        qeth_cmd_buffer pointer
 * @reply_cb:                   callback function pointer
 *  cb_card:                    pointer to the qeth_card structure
 *  cb_reply:                   pointer to the qeth_reply structure
 *  cb_cmd:                     pointer to the original iob for non-IPA
 *                              commands, or to the qeth_ipa_cmd structure
 *                              for the IPA commands.
 * @reply_param:                private pointer passed to the callback
 *
 * Callback function gets called one or more times, with cb_cmd
 * pointing to the response returned by the hardware. Callback
 * function must return
 *   > 0 if more reply blocks are expected,
 *     0 if the last or only reply block is received, and
 *   < 0 on error.
 * Callback function can get the value of the reply_param pointer from the
 * field 'param' of the structure qeth_reply.
 */

static int qeth_send_control_data(struct qeth_card *card,
                                  struct qeth_cmd_buffer *iob,
                                  int (*reply_cb)(struct qeth_card *cb_card,
                                                  struct qeth_reply *cb_reply,
                                                  unsigned long cb_cmd),
                                  void *reply_param)
{
        struct qeth_channel *channel = iob->channel;
        struct qeth_reply *reply = &iob->reply;
        long timeout = iob->timeout;
        int rc;

        QETH_CARD_TEXT(card, 2, "sendctl");

        reply->callback = reply_cb;
        reply->param = reply_param;

        timeout = wait_event_interruptible_timeout(card->wait_q,
                                                   qeth_trylock_channel(channel, iob),
                                                   timeout);
        if (timeout <= 0) {
                qeth_put_cmd(iob);
                return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
        }

        if (iob->finalize)
                iob->finalize(card, iob);
        QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));

        qeth_enqueue_cmd(card, iob);

        /* This pairs with iob->callback, and keeps the iob alive after IO: */
        qeth_get_cmd(iob);

        QETH_CARD_TEXT(card, 6, "noirqpnd");
        spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
        rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
                                      (addr_t) iob, 0, 0, timeout);
        spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
        if (rc) {
                QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
                                 CARD_DEVID(card), rc);
                QETH_CARD_TEXT_(card, 2, " err%d", rc);
                qeth_dequeue_cmd(card, iob);
                qeth_put_cmd(iob);
                qeth_unlock_channel(card, channel);
                goto out;
        }

        timeout = wait_for_completion_interruptible_timeout(&iob->done,
                                                            timeout);
        if (timeout <= 0)
                rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;

        qeth_dequeue_cmd(card, iob);

        if (reply_cb) {
                /* Wait until the callback for a late reply has completed: */
                spin_lock_irq(&iob->lock);
                if (rc)
                        /* Zap any callback that's still pending: */
                        iob->rc = rc;
                spin_unlock_irq(&iob->lock);
        }

        if (!rc)
                rc = iob->rc;

out:
        qeth_put_cmd(iob);
        return rc;
}

struct qeth_node_desc {
        struct node_descriptor nd1;
        struct node_descriptor nd2;
        struct node_descriptor nd3;
};

static void qeth_read_conf_data_cb(struct qeth_card *card,
                                   struct qeth_cmd_buffer *iob,
                                   unsigned int data_length)
{
        struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
        int rc = 0;
        u8 *tag;

        QETH_CARD_TEXT(card, 2, "cfgunit");

        if (data_length < sizeof(*nd)) {
                rc = -EINVAL;
                goto out;
        }

        card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
                               nd->nd1.plant[1] == _ascebc['M'];
        tag = (u8 *)&nd->nd1.tag;
        card->info.chpid = tag[0];
        card->info.unit_addr2 = tag[1];

        tag = (u8 *)&nd->nd2.tag;
        card->info.cula = tag[1];

        card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
                                 nd->nd3.model[1] == 0xF0 &&
                                 nd->nd3.model[2] >= 0xF1 &&
                                 nd->nd3.model[2] <= 0xF4;

out:
        qeth_notify_cmd(iob, rc);
        qeth_put_cmd(iob);
}

static int qeth_read_conf_data(struct qeth_card *card)
{
        struct qeth_channel *channel = &card->data;
        struct qeth_cmd_buffer *iob;
        struct ciw *ciw;

        /* 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;
        if (ciw->count < sizeof(struct qeth_node_desc))
                return -EINVAL;

        iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
        if (!iob)
                return -ENOMEM;

        iob->callback = qeth_read_conf_data_cb;
        qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
                       iob->data);

        return qeth_send_control_data(card, iob, NULL, NULL);
}

static int qeth_idx_check_activate_response(struct qeth_card *card,
                                            struct qeth_channel *channel,
                                            struct qeth_cmd_buffer *iob)
{
        int rc;

        rc = qeth_check_idx_response(card, iob->data);
        if (rc)
                return rc;

        if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
                return 0;

        /* negative reply: */
        QETH_CARD_TEXT_(card, 2, "idxneg%c",
                        QETH_IDX_ACT_CAUSE_CODE(iob->data));

        switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
        case QETH_IDX_ACT_ERR_EXCL:
                dev_err(&channel->ccwdev->dev,
                        "The adapter is used exclusively by another host\n");
                return -EBUSY;
        case QETH_IDX_ACT_ERR_AUTH:
        case QETH_IDX_ACT_ERR_AUTH_USER:
                dev_err(&channel->ccwdev->dev,
                        "Setting the device online failed because of insufficient authorization\n");
                return -EPERM;
        default:
                QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
                                 CCW_DEVID(channel->ccwdev));
                return -EIO;
        }
}

static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
                                              struct qeth_cmd_buffer *iob,
                                              unsigned int data_length)
{
        struct qeth_channel *channel = iob->channel;
        u16 peer_level;
        int rc;

        QETH_CARD_TEXT(card, 2, "idxrdcb");

        rc = qeth_idx_check_activate_response(card, channel, iob);
        if (rc)
                goto out;

        memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
        if (peer_level != qeth_peer_func_level(card->info.func_level)) {
                QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
                                 CCW_DEVID(channel->ccwdev),
                                 card->info.func_level, peer_level);
                rc = -EINVAL;
                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);

out:
        qeth_notify_cmd(iob, rc);
        qeth_put_cmd(iob);
}

static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
                                               struct qeth_cmd_buffer *iob,
                                               unsigned int data_length)
{
        struct qeth_channel *channel = iob->channel;
        u16 peer_level;
        int rc;

        QETH_CARD_TEXT(card, 2, "idxwrcb");

        rc = qeth_idx_check_activate_response(card, channel, iob);
        if (rc)
                goto out;

        memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
        if ((peer_level & ~0x0100) !=
            qeth_peer_func_level(card->info.func_level)) {
                QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
                                 CCW_DEVID(channel->ccwdev),
                                 card->info.func_level, peer_level);
                rc = -EINVAL;
        }

out:
        qeth_notify_cmd(iob, rc);
        qeth_put_cmd(iob);
}

static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
                                        struct qeth_cmd_buffer *iob)
{
        u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
        u8 port = ((u8)card->dev->dev_port) | 0x80;
        struct ccw1 *ccw = __ccw_from_cmd(iob);

        qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
                       iob->data);
        qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
        iob->finalize = qeth_idx_finalize_cmd;

        port |= QETH_IDX_ACT_INVAL_FRAME;
        memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 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, 2);
        memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
        memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
}

static int qeth_idx_activate_read_channel(struct qeth_card *card)
{
        struct qeth_channel *channel = &card->read;
        struct qeth_cmd_buffer *iob;
        int rc;

        QETH_CARD_TEXT(card, 2, "idxread");

        iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
        if (!iob)
                return -ENOMEM;

        memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
        qeth_idx_setup_activate_cmd(card, iob);
        iob->callback = qeth_idx_activate_read_channel_cb;

        rc = qeth_send_control_data(card, iob, NULL, NULL);
        if (rc)
                return rc;

        channel->state = CH_STATE_UP;
        return 0;
}

static int qeth_idx_activate_write_channel(struct qeth_card *card)
{
        struct qeth_channel *channel = &card->write;
        struct qeth_cmd_buffer *iob;
        int rc;

        QETH_CARD_TEXT(card, 2, "idxwrite");

        iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
        if (!iob)
                return -ENOMEM;

        memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
        qeth_idx_setup_activate_cmd(card, iob);
        iob->callback = qeth_idx_activate_write_channel_cb;

        rc = qeth_send_control_data(card, iob, NULL, NULL);
        if (rc)
                return rc;

        channel->state = CH_STATE_UP;
        return 0;
}

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

        QETH_CARD_TEXT(card, 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);
        return 0;
}

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

        QETH_CARD_TEXT(card, 2, "cmenable");

        iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
        if (!iob)
                return -ENOMEM;

        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);

        return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
}

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

        QETH_CARD_TEXT(card, 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);
        return 0;
}

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

        QETH_CARD_TEXT(card, 2, "cmsetup");

        iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
        if (!iob)
                return -ENOMEM;

        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);
        return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
}

static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
{
        if (link_type == QETH_LINK_TYPE_LANE_TR ||
            link_type == QETH_LINK_TYPE_HSTR) {
                dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
                return false;
        }

        return true;
}

static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
{
        struct net_device *dev = card->dev;
        unsigned int new_mtu;

        if (!max_mtu) {
                /* IQD needs accurate max MTU to set up its RX buffers: */
                if (IS_IQD(card))
                        return -EINVAL;
                /* tolerate quirky HW: */
                max_mtu = ETH_MAX_MTU;
        }

        rtnl_lock();
        if (IS_IQD(card)) {
                /* move any device with default MTU to new max MTU: */
                new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;

                /* adjust RX buffer size to new max MTU: */
                card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
                if (dev->max_mtu && dev->max_mtu != max_mtu)
                        qeth_free_qdio_queues(card);
        } else {
                if (dev->mtu)
                        new_mtu = dev->mtu;
                /* default MTUs for first setup: */
                else if (IS_LAYER2(card))
                        new_mtu = ETH_DATA_LEN;
                else
                        new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
        }

        dev->max_mtu = max_mtu;
        dev->mtu = min(new_mtu, max_mtu);
        rtnl_unlock();
        return 0;
}

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

static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
                unsigned long data)
{
        __u16 mtu, framesize;
        __u16 len;
        struct qeth_cmd_buffer *iob;
        u8 link_type = 0;

        QETH_CARD_TEXT(card, 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 (IS_IQD(card)) {
                memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
                mtu = qeth_get_mtu_outof_framesize(framesize);
        } else {
                mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
        }
        *(u16 *)reply->param = mtu;

        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);
                if (!qeth_is_supported_link_type(card, link_type))
                        return -EPROTONOSUPPORT;
        }

        card->info.link_type = link_type;
        QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
        return 0;
}

static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
{
        return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
}

static int qeth_ulp_enable(struct qeth_card *card)
{
        u8 prot_type = qeth_mpc_select_prot_type(card);
        struct qeth_cmd_buffer *iob;
        u16 max_mtu;
        int rc;

        QETH_CARD_TEXT(card, 2, "ulpenabl");

        iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
        if (!iob)
                return -ENOMEM;

        *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
        memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
        memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
               &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
               &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
        rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
        if (rc)
                return rc;
        return qeth_update_max_mtu(card, max_mtu);
}

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

        QETH_CARD_TEXT(card, 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_CARD_TEXT(card, 2, "olmlimit");
                dev_err(&card->gdev->dev, "A connection could not be "
                        "established because of an OLM limit\n");
                return -EMLINK;
        }
        return 0;
}

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

        QETH_CARD_TEXT(card, 2, "ulpsetup");

        iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
        if (!iob)
                return -ENOMEM;

        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);

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

static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
                              gfp_t gfp)
{
        struct qeth_qdio_out_buffer *newbuf;

        newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
        if (!newbuf)
                return -ENOMEM;

        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);
        atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
        q->bufs[bidx] = newbuf;
        return 0;
}

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

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

static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
{
        struct qeth_qdio_out_q *q = kzalloc_obj(*q);
        unsigned int i;

        if (!q)
                return NULL;

        if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
                goto err_qdio_bufs;

        for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
                if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
                        goto err_out_bufs;
        }

        return q;

err_out_bufs:
        while (i > 0)
                qeth_free_out_buf(q->bufs[--i]);
        qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
err_qdio_bufs:
        kfree(q);
        return NULL;
}

static void qeth_tx_completion_timer(struct timer_list *timer)
{
        struct qeth_qdio_out_q *queue = timer_container_of(queue, timer,
                                                           timer);

        napi_schedule(&queue->napi);
        QETH_TXQ_STAT_INC(queue, completion_timer);
}

static int qeth_alloc_qdio_queues(struct qeth_card *card)
{
        unsigned int i;

        QETH_CARD_TEXT(card, 2, "allcqdbf");

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

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

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

        /* outbound */
        for (i = 0; i < card->qdio.no_out_queues; ++i) {
                struct qeth_qdio_out_q *queue;

                queue = qeth_alloc_output_queue();
                if (!queue)
                        goto out_freeoutq;
                QETH_CARD_TEXT_(card, 2, "outq %i", i);
                QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
                card->qdio.out_qs[i] = queue;
                queue->card = card;
                queue->queue_no = i;
                INIT_LIST_HEAD(&queue->pending_bufs);
                spin_lock_init(&queue->lock);
                timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
                if (IS_IQD(card)) {
                        queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
                        queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
                        queue->rescan_usecs = QETH_TX_TIMER_USECS;
                } else {
                        queue->coalesce_usecs = USEC_PER_SEC;
                        queue->max_coalesced_frames = 0;
                        queue->rescan_usecs = 10 * USEC_PER_SEC;
                }
                queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
        }

        return 0;

out_freeoutq:
        while (i > 0) {
                qeth_free_output_queue(card->qdio.out_qs[--i]);
                card->qdio.out_qs[i] = NULL;
        }
        qeth_free_buffer_pool(card);
out_buffer_pool:
        atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
        qeth_free_cq(card);
out_err:
        return -ENOMEM;
}

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

        qeth_free_cq(card);

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

        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
                if (card->qdio.in_q->bufs[j].rx_skb) {
                        consume_skb(card->qdio.in_q->bufs[j].rx_skb);
                        card->qdio.in_q->bufs[j].rx_skb = NULL;
                }
        }

        /* inbound buffer pool */
        qeth_free_buffer_pool(card);
        /* free outbound qdio_qs */
        for (i = 0; i < card->qdio.no_out_queues; i++) {
                qeth_free_output_queue(card->qdio.out_qs[i]);
                card->qdio.out_qs[i] = NULL;
        }
}

static void qeth_fill_qib_parms(struct qeth_card *card,
                                struct qeth_qib_parms *parms)
{
        struct qeth_qdio_out_q *queue;
        unsigned int i;

        parms->pcit_magic[0] = 'P';
        parms->pcit_magic[1] = 'C';
        parms->pcit_magic[2] = 'I';
        parms->pcit_magic[3] = 'T';
        ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
        parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
        parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
        parms->pcit_c = QETH_PCI_TIMER_VALUE(card);

        parms->blkt_magic[0] = 'B';
        parms->blkt_magic[1] = 'L';
        parms->blkt_magic[2] = 'K';
        parms->blkt_magic[3] = 'T';
        ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
        parms->blkt_total = card->info.blkt.time_total;
        parms->blkt_inter_packet = card->info.blkt.inter_packet;
        parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;

        /* Prio-queueing implicitly uses the default priorities: */
        if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
                return;

        parms->pque_magic[0] = 'P';
        parms->pque_magic[1] = 'Q';
        parms->pque_magic[2] = 'U';
        parms->pque_magic[3] = 'E';
        ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
        parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
        parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;

        qeth_for_each_output_queue(card, queue, i)
                parms->pque_priority[i] = queue->priority;
}

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

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

        QETH_CARD_TEXT(card, 2, "dmact");

        iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
        if (!iob)
                return -ENOMEM;

        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);
        return qeth_send_control_data(card, iob, NULL, NULL);
}

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

        QETH_CARD_TEXT(card, 2, "mpcinit");

        rc = qeth_issue_next_read(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "1err%d", rc);
                return rc;
        }
        rc = qeth_cm_enable(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "2err%d", rc);
                return rc;
        }
        rc = qeth_cm_setup(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "3err%d", rc);
                return rc;
        }
        rc = qeth_ulp_enable(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "4err%d", rc);
                return rc;
        }
        rc = qeth_ulp_setup(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "5err%d", rc);
                return rc;
        }
        rc = qeth_alloc_qdio_queues(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "5err%d", rc);
                return rc;
        }
        rc = qeth_qdio_establish(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "6err%d", rc);
                qeth_free_qdio_queues(card);
                return rc;
        }
        rc = qeth_qdio_activate(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "7err%d", rc);
                return rc;
        }
        rc = qeth_dm_act(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "8err%d", rc);
                return rc;
        }

        return 0;
}

static 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]) {
                        scnprintf(card->info.mcl_level,
                                  sizeof(card->info.mcl_level),
                                  "%02x%02x",
                                  card->info.mcl_level[2],
                                  card->info.mcl_level[3]);
                        break;
                }
                fallthrough;
        case QETH_CARD_TYPE_IQD:
                if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
                        card->info.mcl_level[0] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[0]];
                        card->info.mcl_level[1] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[1]];
                        card->info.mcl_level[2] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[2]];
                        card->info.mcl_level[3] = (char) _ebcasc[(__u8)
                                card->info.mcl_level[3]];
                        card->info.mcl_level[QETH_MCL_LENGTH] = 0;
                }
                break;
        default:
                memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
        }
        dev_info(&card->gdev->dev,
                 "Device is a%s card%s%s%s\nwith link type %s.\n",
                 qeth_get_cardname(card),
                 (card->info.mcl_level[0]) ? " (level: " : "",
                 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
                 (card->info.mcl_level[0]) ? ")" : "",
                 qeth_get_cardname_short(card));
}

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

        QETH_CARD_TEXT(card, 5, "inwrklst");

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

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

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

        list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
                free = 1;
                for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                        if (page_count(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_first_entry(&card->qdio.in_buf_pool.entry_list,
                                 struct qeth_buffer_pool_entry, list);
        for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                if (page_count(entry->elements[i]) > 1) {
                        struct page *page = dev_alloc_page();

                        if (!page)
                                return NULL;

                        __free_page(entry->elements[i]);
                        entry->elements[i] = page;
                        QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
                }
        }
        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 = buf->pool_entry;
        int i;

        if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
                buf->rx_skb = netdev_alloc_skb(card->dev,
                                               ETH_HLEN +
                                               sizeof(struct ipv6hdr));
                if (!buf->rx_skb)
                        return -ENOMEM;
        }

        if (!pool_entry) {
                pool_entry = qeth_find_free_buffer_pool_entry(card);
                if (!pool_entry)
                        return -ENOBUFS;

                buf->pool_entry = pool_entry;
        }

        /*
         * 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
         */
        for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
                buf->buffer->element[i].length = PAGE_SIZE;
                buf->buffer->element[i].addr = u64_to_dma64(
                        page_to_phys(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;
}

static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
                                            struct qeth_qdio_out_q *queue)
{
        if (!IS_IQD(card) ||
            qeth_iqd_is_mcast_queue(card, queue) ||
            card->options.cq == QETH_CQ_ENABLED ||
            qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
                return 1;

        return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
}

static int qeth_init_qdio_queues(struct qeth_card *card)
{
        unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
        unsigned int i;
        int rc;

        QETH_CARD_TEXT(card, 2, "initqdqs");

        /* inbound queue */
        qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
        memset(&card->rx, 0, sizeof(struct qeth_rx));

        qeth_initialize_working_pool_list(card);
        /*give only as many buffers to hardware as we have buffer pool entries*/
        for (i = 0; i < rx_bufs; i++) {
                rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
                if (rc)
                        return rc;
        }

        card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
        rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
        if (rc) {
                QETH_CARD_TEXT_(card, 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) {
                struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];

                qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
                queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
                queue->next_buf_to_fill = 0;
                queue->do_pack = 0;
                queue->prev_hdr = NULL;
                queue->coalesced_frames = 0;
                queue->bulk_start = 0;
                queue->bulk_count = 0;
                queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
                atomic_set(&queue->used_buffers, 0);
                atomic_set(&queue->set_pci_flags_count, 0);
                netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
        }
        return 0;
}

static void qeth_ipa_finalize_cmd(struct qeth_card *card,
                                  struct qeth_cmd_buffer *iob)
{
        qeth_mpc_finalize_cmd(card, iob);

        /* override with IPA-specific values: */
        __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
}

static void qeth_prepare_ipa_cmd(struct qeth_card *card,
                                 struct qeth_cmd_buffer *iob, u16 cmd_length)
{
        u8 prot_type = qeth_mpc_select_prot_type(card);
        u16 total_length = iob->length;

        qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
                       iob->data);
        iob->finalize = qeth_ipa_finalize_cmd;

        memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
        memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
        memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
        memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
        memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
        memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
               &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
        memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
}

static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
                                 struct qeth_cmd_buffer *reply)
{
        struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);

        return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
}

struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
                                           enum qeth_ipa_cmds cmd_code,
                                           enum qeth_prot_versions prot,
                                           unsigned int data_length)
{
        struct qeth_cmd_buffer *iob;
        struct qeth_ipacmd_hdr *hdr;

        data_length += offsetof(struct qeth_ipa_cmd, data);
        iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
                             QETH_IPA_TIMEOUT);
        if (!iob)
                return NULL;

        qeth_prepare_ipa_cmd(card, iob, data_length);
        iob->match = qeth_ipa_match_reply;

        hdr = &__ipa_cmd(iob)->hdr;
        hdr->command = cmd_code;
        hdr->initiator = IPA_CMD_INITIATOR_HOST;
        /* hdr->seqno is set by qeth_send_control_data() */
        hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
        hdr->rel_adapter_no = (u8) card->dev->dev_port;
        hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
        hdr->param_count = 1;
        hdr->prot_version = prot;
        return iob;
}
EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);

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

        return (cmd->hdr.return_code) ? -EIO : 0;
}

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

int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
                int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
                        unsigned long),
                void *reply_param)
{
        int rc;

        QETH_CARD_TEXT(card, 4, "sendipa");

        if (card->read_or_write_problem) {
                qeth_put_cmd(iob);
                return -EIO;
        }

        if (reply_cb == NULL)
                reply_cb = qeth_send_ipa_cmd_cb;
        rc = qeth_send_control_data(card, 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);

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

        if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
                return -ENETDOWN;

        return (cmd->hdr.return_code) ? -EIO : 0;
}

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

        QETH_CARD_TEXT(card, 2, "strtlan");

        iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
        if (!iob)
                return -ENOMEM;
        return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
}

static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
{
        if (!cmd->hdr.return_code)
                cmd->hdr.return_code =
                        cmd->data.setadapterparms.hdr.return_code;
        return cmd->hdr.return_code;
}

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

        QETH_CARD_TEXT(card, 3, "quyadpcb");
        if (qeth_setadpparms_inspect_rc(cmd))
                return -EIO;

        query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
        if (query_cmd->lan_type & 0x7f) {
                if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
                        return -EPROTONOSUPPORT;

                card->info.link_type = query_cmd->lan_type;
                QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
        }

        card->options.adp.supported = query_cmd->supported_cmds;
        return 0;
}

static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
                                                    enum qeth_ipa_setadp_cmd adp_cmd,
                                                    unsigned int data_length)
{
        struct qeth_ipacmd_setadpparms_hdr *hdr;
        struct qeth_cmd_buffer *iob;

        iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
                                 data_length +
                                 offsetof(struct qeth_ipacmd_setadpparms,
                                          data));
        if (!iob)
                return NULL;

        hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
        hdr->cmdlength = sizeof(*hdr) + data_length;
        hdr->command_code = adp_cmd;
        hdr->used_total = 1;
        hdr->seq_no = 1;
        return iob;
}

static 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,
                                   SETADP_DATA_SIZEOF(query_cmds_supp));
        if (!iob)
                return -ENOMEM;
        rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
        return rc;
}

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

        QETH_CARD_TEXT(card, 2, "qipasscb");

        cmd = (struct qeth_ipa_cmd *) data;

        switch (cmd->hdr.return_code) {
        case IPA_RC_SUCCESS:
                break;
        case IPA_RC_NOTSUPP:
        case IPA_RC_L2_UNSUPPORTED_CMD:
                QETH_CARD_TEXT(card, 2, "ipaunsup");
                card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
                card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
                return -EOPNOTSUPP;
        default:
                QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
                                 CARD_DEVID(card), cmd->hdr.return_code);
                return -EIO;
        }

        if (cmd->hdr.prot_version == QETH_PROT_IPV4)
                card->options.ipa4 = cmd->hdr.assists;
        else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
                card->options.ipa6 = cmd->hdr.assists;
        else
                QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
                                 CARD_DEVID(card));
        return 0;
}

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

        QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
        iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
        if (!iob)
                return -ENOMEM;
        rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
        return rc;
}

static int qeth_query_switch_attributes_cb(struct qeth_card *card,
                                struct qeth_reply *reply, unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        struct qeth_query_switch_attributes *attrs;
        struct qeth_switch_info *sw_info;

        QETH_CARD_TEXT(card, 2, "qswiatcb");
        if (qeth_setadpparms_inspect_rc(cmd))
                return -EIO;

        sw_info = (struct qeth_switch_info *)reply->param;
        attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
        sw_info->capabilities = attrs->capabilities;
        sw_info->settings = attrs->settings;
        QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
                        sw_info->settings);
        return 0;
}

int qeth_query_switch_attributes(struct qeth_card *card,
                                 struct qeth_switch_info *sw_info)
{
        struct qeth_cmd_buffer *iob;

        QETH_CARD_TEXT(card, 2, "qswiattr");
        if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
                return -EOPNOTSUPP;
        if (!netif_carrier_ok(card->dev))
                return -ENOMEDIUM;
        iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
        if (!iob)
                return -ENOMEM;
        return qeth_send_ipa_cmd(card, iob,
                                qeth_query_switch_attributes_cb, sw_info);
}

struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
                                          enum qeth_diags_cmds sub_cmd,
                                          unsigned int data_length)
{
        struct qeth_ipacmd_diagass *cmd;
        struct qeth_cmd_buffer *iob;

        iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
                                 DIAG_HDR_LEN + data_length);
        if (!iob)
                return NULL;

        cmd = &__ipa_cmd(iob)->data.diagass;
        cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
        cmd->subcmd = sub_cmd;
        return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);

static int qeth_query_setdiagass_cb(struct qeth_card *card,
                struct qeth_reply *reply, unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        u16 rc = cmd->hdr.return_code;

        if (rc) {
                QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
                return -EIO;
        }

        card->info.diagass_support = cmd->data.diagass.ext;
        return 0;
}

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

        QETH_CARD_TEXT(card, 2, "qdiagass");
        iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
        if (!iob)
                return -ENOMEM;
        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);
}

static int qeth_hw_trap_cb(struct qeth_card *card,
                struct qeth_reply *reply, unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        u16 rc = cmd->hdr.return_code;

        if (rc) {
                QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
                return -EIO;
        }
        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_CARD_TEXT(card, 2, "diagtrap");
        iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
        if (!iob)
                return -ENOMEM;
        cmd = __ipa_cmd(iob);
        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);
}

static 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) {
                        QETH_CARD_STAT_INC(card, rx_fifo_errors);
                        return 0;
                } else
                        return 1;
        }
        return 0;
}

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

        /* 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[QDIO_BUFNR(i)])) {
                                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");
                                schedule_delayed_work(
                                        &card->buffer_reclaim_work,
                                        QETH_RECLAIM_WORK_TIME);
                        }
                        return 0;
                }

                rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
                                                  queue->next_buf_to_init,
                                                  count);
                if (rc) {
                        QETH_CARD_TEXT(card, 2, "qinberr");
                }
                queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
                                                     count);
                return count;
        }

        return 0;
}

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

        local_bh_disable();
        napi_schedule(&card->napi);
        /* kick-start the NAPI softirq: */
        local_bh_enable();
}

static void 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");
        qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");

        if (!qdio_err)
                return;

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

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

/**
 * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
 * @queue: queue to check for packing buffer
 *
 * Returns number of buffers that were prepared for flush.
 */
static int qeth_prep_flush_pack_buffer(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 =
                        QDIO_BUFNR(queue->next_buf_to_fill + 1);
                return 1;
        }
        return 0;
}

/*
 * 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");
                        QETH_TXQ_STAT_INC(queue, packing_mode_switch);
                        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)
{
        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");
                        QETH_TXQ_STAT_INC(queue, packing_mode_switch);
                        queue->do_pack = 0;
                        return qeth_prep_flush_pack_buffer(queue);
                }
        }
        return 0;
}

static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
                               int count)
{
        struct qeth_qdio_out_buffer *buf = queue->bufs[index];
        struct qeth_card *card = queue->card;
        unsigned int frames, usecs;
        struct qaob *aob = NULL;
        int rc;
        int i;

        for (i = index; i < index + count; ++i) {
                unsigned int bidx = QDIO_BUFNR(i);
                struct sk_buff *skb;

                buf = queue->bufs[bidx];
                buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
                                SBAL_EFLAGS_LAST_ENTRY;
                queue->coalesced_frames += buf->frames;

                if (IS_IQD(card)) {
                        skb_queue_walk(&buf->skb_list, skb)
                                skb_tx_timestamp(skb);
                }
        }

        if (IS_IQD(card)) {
                if (card->options.cq == QETH_CQ_ENABLED &&
                    !qeth_iqd_is_mcast_queue(card, queue) &&
                    count == 1) {
                        if (!buf->aob)
                                buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
                                                             GFP_ATOMIC);
                        if (buf->aob) {
                                struct qeth_qaob_priv1 *priv;

                                aob = buf->aob;
                                priv = (struct qeth_qaob_priv1 *)&aob->user1;
                                priv->state = QETH_QAOB_ISSUED;
                                priv->queue_no = queue->queue_no;
                        }
                }
        } else {
                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 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;
                        }
                }
        }

        QETH_TXQ_STAT_INC(queue, doorbell);
        rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
                                           index, count, aob);

        switch (rc) {
        case 0:
        case -ENOBUFS:
                /* ignore temporary SIGA errors without busy condition */

                /* Fake the TX completion interrupt: */
                frames = READ_ONCE(queue->max_coalesced_frames);
                usecs = READ_ONCE(queue->coalesce_usecs);

                if (frames && queue->coalesced_frames >= frames) {
                        napi_schedule(&queue->napi);
                        queue->coalesced_frames = 0;
                        QETH_TXQ_STAT_INC(queue, coal_frames);
                } else if (qeth_use_tx_irqs(card) &&
                           atomic_read(&queue->used_buffers) >= 32) {
                        /* Old behaviour carried over from the qdio layer: */
                        napi_schedule(&queue->napi);
                        QETH_TXQ_STAT_INC(queue, coal_frames);
                } else if (usecs) {
                        qeth_tx_arm_timer(queue, usecs);
                }

                break;
        default:
                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);
        }
}

static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
{
        qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);

        queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
        queue->prev_hdr = NULL;
        queue->bulk_count = 0;
}

static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
{
        /*
         * check if we 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)) {
                unsigned int index, flush_cnt;

                spin_lock(&queue->lock);

                index = queue->next_buf_to_fill;

                flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
                if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
                        flush_cnt = qeth_prep_flush_pack_buffer(queue);

                if (flush_cnt) {
                        qeth_flush_buffers(queue, index, flush_cnt);
                        QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
                }

                spin_unlock(&queue->lock);
        }
}

static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
{
        struct qeth_card *card = (struct qeth_card *)card_ptr;

        napi_schedule_irqoff(&card->napi);
}

int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
{
        if (card->options.cq == QETH_CQ_NOTAVAILABLE)
                return -1;

        card->options.cq = cq;
        return 0;
}
EXPORT_SYMBOL_GPL(qeth_configure_cq);

static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
{
        struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
        unsigned int queue_no = priv->queue_no;

        BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));

        if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
            queue_no < card->qdio.no_out_queues)
                napi_schedule(&card->qdio.out_qs[queue_no]->napi);
}

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;

        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_tx_stop_all_queues(card->dev);
                qeth_schedule_recovery(card);
                return;
        }

        for (i = first_element; i < first_element + count; ++i) {
                struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
                int e = 0;

                while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
                       buffer->element[e].addr) {
                        dma64_t phys_aob_addr = buffer->element[e].addr;

                        qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr));
                        ++e;
                }
                qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
        }
        rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
                                          cq->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");
        }

        cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
}

static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
                                    unsigned int qdio_err, 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 (qdio_err)
                qeth_schedule_recovery(card);
}

static 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;

        QETH_CARD_TEXT(card, 2, "achkcond");
        netif_tx_stop_all_queues(card->dev);
        qeth_schedule_recovery(card);
}

/*
 * Note: Function assumes that we have 4 outbound queues.
 */
static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
{
        struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
        u8 tos;

        switch (card->qdio.do_prio_queueing) {
        case QETH_PRIO_Q_ING_TOS:
        case QETH_PRIO_Q_ING_PREC:
                switch (vlan_get_protocol(skb)) {
                case htons(ETH_P_IP):
                        tos = ipv4_get_dsfield(ip_hdr(skb));
                        break;
                case htons(ETH_P_IPV6):
                        tos = ipv6_get_dsfield(ipv6_hdr(skb));
                        break;
                default:
                        return card->qdio.default_out_queue;
                }
                if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
                        return ~tos >> 6 & 3;
                if (tos & IPTOS_MINCOST)
                        return 3;
                if (tos & IPTOS_RELIABILITY)
                        return 2;
                if (tos & IPTOS_THROUGHPUT)
                        return 1;
                if (tos & IPTOS_LOWDELAY)
                        return 0;
                break;
        case QETH_PRIO_Q_ING_SKB:
                if (skb->priority > 5)
                        return 0;
                return ~skb->priority >> 1 & 3;
        case QETH_PRIO_Q_ING_VLAN:
                if (veth->h_vlan_proto == htons(ETH_P_8021Q))
                        return ~ntohs(veth->h_vlan_TCI) >>
                               (VLAN_PRIO_SHIFT + 1) & 3;
                break;
        case QETH_PRIO_Q_ING_FIXED:
                return card->qdio.default_out_queue;
        default:
                break;
        }
        return card->qdio.default_out_queue;
}

/**
 * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
 * @skb:                                SKB address
 *
 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
 * fragmented part of the SKB. Returns zero for linear SKB.
 */
static int qeth_get_elements_for_frags(struct sk_buff *skb)
{
        int cnt, elements = 0;

        for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
                skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];

                elements += qeth_get_elements_for_range(
                        (addr_t)skb_frag_address(frag),
                        (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
        }
        return elements;
}

/**
 * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
 *                              to transmit an skb.
 * @skb:                        the skb to operate on.
 * @data_offset:                skip this part of the skb's linear data
 *
 * Returns the number of pages, and thus QDIO buffer elements, needed to map the
 * skb's data (both its linear part and paged fragments).
 */
static unsigned int qeth_count_elements(struct sk_buff *skb,
                                        unsigned int data_offset)
{
        unsigned int elements = qeth_get_elements_for_frags(skb);
        addr_t end = (addr_t)skb->data + skb_headlen(skb);
        addr_t start = (addr_t)skb->data + data_offset;

        if (start != end)
                elements += qeth_get_elements_for_range(start, end);
        return elements;
}

#define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
                                         MAX_TCP_HEADER)

/**
 * qeth_add_hw_header() - add a HW header to an skb.
 * @queue: TX queue that the skb will be placed on.
 * @skb: skb that the HW header should be added to.
 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
 *       it contains a valid pointer to a qeth_hdr.
 * @hdr_len: length of the HW header.
 * @proto_len: length of protocol headers that need to be in same page as the
 *             HW header.
 * @elements: returns the required number of buffer elements for this skb.
 *
 * Returns the pushed length. If the header can't be pushed on
 * (eg. because it would cross a page boundary), it is allocated from
 * the cache instead and 0 is returned.
 * The number of needed buffer elements is returned in @elements.
 * Error to create the hdr is indicated by returning with < 0.
 */
static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
                              struct sk_buff *skb, struct qeth_hdr **hdr,
                              unsigned int hdr_len, unsigned int proto_len,
                              unsigned int *elements)
{
        gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
        const unsigned int contiguous = proto_len ? proto_len : 1;
        const unsigned int max_elements = queue->max_elements;
        unsigned int __elements;
        addr_t start, end;
        bool push_ok;
        int rc;

check_layout:
        start = (addr_t)skb->data - hdr_len;
        end = (addr_t)skb->data;

        if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
                /* Push HW header into same page as first protocol header. */
                push_ok = true;
                /* ... but TSO always needs a separate element for headers: */
                if (skb_is_gso(skb))
                        __elements = 1 + qeth_count_elements(skb, proto_len);
                else
                        __elements = qeth_count_elements(skb, 0);
        } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
                /* Push HW header into preceding page, flush with skb->data. */
                push_ok = true;
                __elements = 1 + qeth_count_elements(skb, 0);
        } else {
                /* Use header cache, copy protocol headers up. */
                push_ok = false;
                __elements = 1 + qeth_count_elements(skb, proto_len);
        }

        /* Compress skb to fit into one IO buffer: */
        if (__elements > max_elements) {
                if (!skb_is_nonlinear(skb)) {
                        /* Drop it, no easy way of shrinking it further. */
                        QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
                                         max_elements, __elements, skb->len);
                        return -E2BIG;
                }

                rc = skb_linearize(skb);
                if (rc) {
                        QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
                        return rc;
                }

                QETH_TXQ_STAT_INC(queue, skbs_linearized);
                /* Linearization changed the layout, re-evaluate: */
                goto check_layout;
        }

        *elements = __elements;
        /* Add the header: */
        if (push_ok) {
                *hdr = skb_push(skb, hdr_len);
                return hdr_len;
        }

        /* Fall back to cache element with known-good alignment: */
        if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
                return -E2BIG;
        *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
        if (!*hdr)
                return -ENOMEM;
        /* Copy protocol headers behind HW header: */
        skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
        return 0;
}

static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
                              struct sk_buff *curr_skb,
                              struct qeth_hdr *curr_hdr)
{
        struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
        struct qeth_hdr *prev_hdr = queue->prev_hdr;

        if (!prev_hdr)
                return true;

        /* All packets must have the same target: */
        if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
                struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);

                return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
                                        eth_hdr(curr_skb)->h_dest) &&
                       qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
        }

        return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
               qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
}

/**
 * qeth_fill_buffer() - map skb into an output buffer
 * @buf:        buffer to transport the skb
 * @skb:        skb to map into the buffer
 * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
 *              from qeth_core_header_cache.
 * @offset:     when mapping the skb, start at skb->data + offset
 * @hd_len:     if > 0, build a dedicated header element of this size
 */
static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
                                     struct sk_buff *skb, struct qeth_hdr *hdr,
                                     unsigned int offset, unsigned int hd_len)
{
        struct qdio_buffer *buffer = buf->buffer;
        int element = buf->next_element_to_fill;
        int length = skb_headlen(skb) - offset;
        char *data = skb->data + offset;
        unsigned int elem_length, cnt;
        bool is_first_elem = true;

        __skb_queue_tail(&buf->skb_list, skb);

        /* build dedicated element for HW Header */
        if (hd_len) {
                is_first_elem = false;

                buffer->element[element].addr = virt_to_dma64(hdr);
                buffer->element[element].length = hd_len;
                buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;

                /* HW header is allocated from cache: */
                if ((void *)hdr != skb->data)
                        __set_bit(element, buf->from_kmem_cache);
                /* HW header was pushed and is contiguous with linear part: */
                else if (length > 0 && !PAGE_ALIGNED(data) &&
                         (data == (char *)hdr + hd_len))
                        buffer->element[element].eflags |=
                                SBAL_EFLAGS_CONTIGUOUS;

                element++;
        }

        /* map linear part into buffer element(s) */
        while (length > 0) {
                elem_length = min_t(unsigned int, length,
                                    PAGE_SIZE - offset_in_page(data));

                buffer->element[element].addr = virt_to_dma64(data);
                buffer->element[element].length = elem_length;
                length -= elem_length;
                if (is_first_elem) {
                        is_first_elem = false;
                        if (length || skb_is_nonlinear(skb))
                                /* skb needs additional elements */
                                buffer->element[element].eflags =
                                        SBAL_EFLAGS_FIRST_FRAG;
                        else
                                buffer->element[element].eflags = 0;
                } else {
                        buffer->element[element].eflags =
                                SBAL_EFLAGS_MIDDLE_FRAG;
                }

                data += elem_length;
                element++;
        }

        /* map page frags into buffer element(s) */
        for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
                skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];

                data = skb_frag_address(frag);
                length = skb_frag_size(frag);
                while (length > 0) {
                        elem_length = min_t(unsigned int, length,
                                            PAGE_SIZE - offset_in_page(data));

                        buffer->element[element].addr = virt_to_dma64(data);
                        buffer->element[element].length = elem_length;
                        buffer->element[element].eflags =
                                SBAL_EFLAGS_MIDDLE_FRAG;

                        length -= elem_length;
                        data += elem_length;
                        element++;
                }
        }

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

static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
                       struct sk_buff *skb, unsigned int elements,
                       struct qeth_hdr *hdr, unsigned int offset,
                       unsigned int hd_len)
{
        unsigned int bytes = qdisc_pkt_len(skb);
        struct qeth_qdio_out_buffer *buffer;
        unsigned int next_element;
        struct netdev_queue *txq;
        bool stopped = false;
        bool flush;

        buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
        txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));

        /* Just a sanity check, the wake/stop logic should ensure that we always
         * get a free buffer.
         */
        if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
                return -EBUSY;

        flush = !qeth_iqd_may_bulk(queue, skb, hdr);

        if (flush ||
            (buffer->next_element_to_fill + elements > queue->max_elements)) {
                if (buffer->next_element_to_fill > 0) {
                        atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
                        queue->bulk_count++;
                }

                if (queue->bulk_count >= queue->bulk_max)
                        flush = true;

                if (flush)
                        qeth_flush_queue(queue);

                buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
                                                queue->bulk_count)];

                /* Sanity-check again: */
                if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
                        return -EBUSY;
        }

        if (buffer->next_element_to_fill == 0 &&
            atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
                /* If a TX completion happens right _here_ and misses to wake
                 * the txq, then our re-check below will catch the race.
                 */
                QETH_TXQ_STAT_INC(queue, stopped);
                netif_tx_stop_queue(txq);
                stopped = true;
        }

        next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
        buffer->bytes += bytes;
        buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
        queue->prev_hdr = hdr;

        flush = __netdev_tx_sent_queue(txq, bytes,
                                       !stopped && netdev_xmit_more());

        if (flush || next_element >= queue->max_elements) {
                atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
                queue->bulk_count++;

                if (queue->bulk_count >= queue->bulk_max)
                        flush = true;

                if (flush)
                        qeth_flush_queue(queue);
        }

        if (stopped && !qeth_out_queue_is_full(queue))
                netif_tx_start_queue(txq);
        return 0;
}

static int qeth_do_send_packet(struct qeth_card *card,
                               struct qeth_qdio_out_q *queue,
                               struct sk_buff *skb, struct qeth_hdr *hdr,
                               unsigned int offset, unsigned int hd_len,
                               unsigned int elements_needed)
{
        unsigned int start_index = queue->next_buf_to_fill;
        struct qeth_qdio_out_buffer *buffer;
        unsigned int next_element;
        struct netdev_queue *txq;
        bool stopped = false;
        int flush_count = 0;
        int do_pack = 0;
        int rc = 0;

        buffer = queue->bufs[queue->next_buf_to_fill];

        /* Just a sanity check, the wake/stop logic should ensure that we always
         * get a free buffer.
         */
        if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
                return -EBUSY;

        txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));

        /* 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 (buffer->next_element_to_fill + elements_needed >
                    queue->max_elements) {
                        /* ... no -> set state PRIMED */
                        atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
                        flush_count++;
                        queue->next_buf_to_fill =
                                QDIO_BUFNR(queue->next_buf_to_fill + 1);
                        buffer = queue->bufs[queue->next_buf_to_fill];

                        /* We stepped forward, so sanity-check again: */
                        if (atomic_read(&buffer->state) !=
                            QETH_QDIO_BUF_EMPTY) {
                                qeth_flush_buffers(queue, start_index,
                                                           flush_count);
                                rc = -EBUSY;
                                goto out;
                        }
                }
        }

        if (buffer->next_element_to_fill == 0 &&
            atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
                /* If a TX completion happens right _here_ and misses to wake
                 * the txq, then our re-check below will catch the race.
                 */
                QETH_TXQ_STAT_INC(queue, stopped);
                netif_tx_stop_queue(txq);
                stopped = true;
        }

        next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
        buffer->bytes += qdisc_pkt_len(skb);
        buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;

        if (queue->do_pack)
                QETH_TXQ_STAT_INC(queue, skbs_pack);
        if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
                flush_count++;
                atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
                queue->next_buf_to_fill =
                                QDIO_BUFNR(queue->next_buf_to_fill + 1);
        }

        if (flush_count)
                qeth_flush_buffers(queue, start_index, flush_count);

out:
        if (do_pack)
                QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);

        if (stopped && !qeth_out_queue_is_full(queue))
                netif_tx_start_queue(txq);
        return rc;
}

static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
                              unsigned int payload_len, struct sk_buff *skb,
                              unsigned int proto_len)
{
        struct qeth_hdr_ext_tso *ext = &hdr->ext;

        ext->hdr_tot_len = sizeof(*ext);
        ext->imb_hdr_no = 1;
        ext->hdr_type = 1;
        ext->hdr_version = 1;
        ext->hdr_len = 28;
        ext->payload_len = payload_len;
        ext->mss = skb_shinfo(skb)->gso_size;
        ext->dg_hdr_len = proto_len;
}

int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
              struct qeth_qdio_out_q *queue, __be16 proto,
              void (*fill_header)(struct qeth_qdio_out_q *queue,
                                  struct qeth_hdr *hdr, struct sk_buff *skb,
                                  __be16 proto, unsigned int data_len))
{
        unsigned int proto_len, hw_hdr_len;
        unsigned int frame_len = skb->len;
        bool is_tso = skb_is_gso(skb);
        unsigned int data_offset = 0;
        struct qeth_hdr *hdr = NULL;
        unsigned int hd_len = 0;
        unsigned int elements;
        int push_len, rc;

        if (is_tso) {
                hw_hdr_len = sizeof(struct qeth_hdr_tso);
                proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
        } else {
                hw_hdr_len = sizeof(struct qeth_hdr);
                proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
        }

        rc = skb_cow_head(skb, hw_hdr_len);
        if (rc)
                return rc;

        push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
                                      &elements);
        if (push_len < 0)
                return push_len;
        if (is_tso || !push_len) {
                /* HW header needs its own buffer element. */
                hd_len = hw_hdr_len + proto_len;
                data_offset = push_len + proto_len;
        }
        memset(hdr, 0, hw_hdr_len);
        fill_header(queue, hdr, skb, proto, frame_len);
        if (is_tso)
                qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
                                  frame_len - proto_len, skb, proto_len);

        if (IS_IQD(card)) {
                rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
                                 hd_len);
        } else {
                /* TODO: drop skb_orphan() once TX completion is fast enough */
                skb_orphan(skb);
                spin_lock(&queue->lock);
                rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
                                         hd_len, elements);
                spin_unlock(&queue->lock);
        }

        if (rc && !push_len)
                kmem_cache_free(qeth_core_header_cache, hdr);

        return rc;
}
EXPORT_SYMBOL_GPL(qeth_xmit);

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_ipa_cmd *) data;
        struct qeth_ipacmd_setadpparms *setparms;

        QETH_CARD_TEXT(card, 4, "prmadpcb");

        setparms = &(cmd->data.setadapterparms);
        if (qeth_setadpparms_inspect_rc(cmd)) {
                QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
                setparms->data.mode = SET_PROMISC_MODE_OFF;
        }
        card->info.promisc_mode = setparms->data.mode;
        return (cmd->hdr.return_code) ? -EIO : 0;
}

void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
{
        enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
                                                    SET_PROMISC_MODE_OFF;
        struct qeth_cmd_buffer *iob;
        struct qeth_ipa_cmd *cmd;

        QETH_CARD_TEXT(card, 4, "setprom");
        QETH_CARD_TEXT_(card, 4, "mode:%x", mode);

        iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
                                   SETADP_DATA_SIZEOF(mode));
        if (!iob)
                return;
        cmd = __ipa_cmd(iob);
        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);

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

        QETH_CARD_TEXT(card, 4, "chgmaccb");
        if (qeth_setadpparms_inspect_rc(cmd))
                return -EIO;

        adp_cmd = &cmd->data.setadapterparms;
        if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
                return -EADDRNOTAVAIL;

        if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
            !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
                return -EADDRNOTAVAIL;

        eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
        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,
                                   SETADP_DATA_SIZEOF(change_addr));
        if (!iob)
                return -ENOMEM;
        cmd = __ipa_cmd(iob);
        cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
        cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
        ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
                        card->dev->dev_addr);
        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_ipa_cmd *) data;
        struct qeth_set_access_ctrl *access_ctrl_req;

        QETH_CARD_TEXT(card, 4, "setaccb");

        access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
        QETH_CARD_TEXT_(card, 2, "rc=%d",
                        cmd->data.setadapterparms.hdr.return_code);
        if (cmd->data.setadapterparms.hdr.return_code !=
                                                SET_ACCESS_CTRL_RC_SUCCESS)
                QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
                                 access_ctrl_req->subcmd_code, CARD_DEVID(card),
                                 cmd->data.setadapterparms.hdr.return_code);
        switch (qeth_setadpparms_inspect_rc(cmd)) {
        case SET_ACCESS_CTRL_RC_SUCCESS:
                if (access_ctrl_req->subcmd_code == 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");
                return 0;
        case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
                QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
                                 CARD_DEVID(card));
                return 0;
        case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
                QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
                                 CARD_DEVID(card));
                return 0;
        case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
                dev_err(&card->gdev->dev, "Adapter does not "
                        "support QDIO data connection isolation\n");
                return -EOPNOTSUPP;
        case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
                dev_err(&card->gdev->dev,
                        "Adapter is dedicated. "
                        "QDIO data connection isolation not supported\n");
                return -EOPNOTSUPP;
        case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
                dev_err(&card->gdev->dev,
                        "TSO does not permit QDIO data connection isolation\n");
                return -EPERM;
        case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
                dev_err(&card->gdev->dev, "The adjacent switch port does not "
                        "support reflective relay mode\n");
                return -EOPNOTSUPP;
        case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
                dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
                                        "enabled at the adjacent switch port");
                return -EREMOTEIO;
        case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
                dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
                                        "at the adjacent switch failed\n");
                /* benign error while disabling ISOLATION_MODE_FWD */
                return 0;
        default:
                return -EIO;
        }
}

int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
                                     enum qeth_ipa_isolation_modes mode)
{
        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");

        if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
                dev_err(&card->gdev->dev,
                        "Adapter does not support QDIO data connection isolation\n");
                return -EOPNOTSUPP;
        }

        iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
                                   SETADP_DATA_SIZEOF(set_access_ctrl));
        if (!iob)
                return -ENOMEM;
        cmd = __ipa_cmd(iob);
        access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
        access_ctrl_req->subcmd_code = mode;

        rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
                               NULL);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
                QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
                                 rc, CARD_DEVID(card));
        }

        return rc;
}

void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
        struct qeth_card *card;

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

static 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_10GBIT_ETH) &&
                    (card->info.link_type != QETH_LINK_TYPE_25GBIT_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_length_errors +
                     card->stats.rx_frame_errors +
                     card->stats.rx_fifo_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;
}

static int qeth_snmp_command_cb(struct qeth_card *card,
                                struct qeth_reply *reply, unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        struct qeth_arp_query_info *qinfo = reply->param;
        struct qeth_ipacmd_setadpparms *adp_cmd;
        unsigned int data_len;
        void *snmp_data;

        QETH_CARD_TEXT(card, 3, "snpcmdcb");

        if (cmd->hdr.return_code) {
                QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
                return -EIO;
        }
        if (cmd->data.setadapterparms.hdr.return_code) {
                cmd->hdr.return_code =
                        cmd->data.setadapterparms.hdr.return_code;
                QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
                return -EIO;
        }

        adp_cmd = &cmd->data.setadapterparms;
        data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
        if (adp_cmd->hdr.seq_no == 1) {
                snmp_data = &adp_cmd->data.snmp;
        } else {
                snmp_data = &adp_cmd->data.snmp.request;
                data_len -= offsetof(struct qeth_snmp_cmd, request);
        }

        /* check if there is enough room in userspace */
        if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
                QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
                return -ENOSPC;
        }
        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*/
        memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
        qinfo->udata_offset += data_len;

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

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

        QETH_CARD_TEXT(card, 3, "snmpcmd");

        if (IS_VM_NIC(card))
                return -EOPNOTSUPP;

        if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
            IS_LAYER3(card))
                return -EOPNOTSUPP;

        ureq = (struct qeth_snmp_ureq __user *) udata;
        if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
            get_user(req_len, &ureq->hdr.req_len))
                return -EFAULT;

        /* Sanitize user input, to avoid overflows in iob size calculation: */
        if (req_len > QETH_BUFSIZE)
                return -EINVAL;

        iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
        if (!iob)
                return -ENOMEM;

        if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
                           &ureq->cmd, req_len)) {
                qeth_put_cmd(iob);
                return -EFAULT;
        }

        qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
        if (!qinfo.udata) {
                qeth_put_cmd(iob);
                return -ENOMEM;
        }
        qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);

        rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
        if (rc)
                QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
                                 CARD_DEVID(card), rc);
        else {
                if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
                        rc = -EFAULT;
        }

        kfree(qinfo.udata);
        return rc;
}

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_ipa_cmd *)data;
        struct qeth_qoat_priv *priv = reply->param;
        int resdatalen;

        QETH_CARD_TEXT(card, 3, "qoatcb");
        if (qeth_setadpparms_inspect_rc(cmd))
                return -EIO;

        resdatalen = cmd->data.setadapterparms.hdr.cmdlength;

        if (resdatalen > (priv->buffer_len - priv->response_len))
                return -ENOSPC;

        memcpy(priv->buffer + priv->response_len,
               &cmd->data.setadapterparms.hdr, resdatalen);
        priv->response_len += resdatalen;

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

static 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))
                return -EOPNOTSUPP;

        if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
                return -EFAULT;

        priv.buffer_len = oat_data.buffer_len;
        priv.response_len = 0;
        priv.buffer = vzalloc(oat_data.buffer_len);
        if (!priv.buffer)
                return -ENOMEM;

        iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
                                   SETADP_DATA_SIZEOF(query_oat));
        if (!iob) {
                rc = -ENOMEM;
                goto out_free;
        }
        cmd = __ipa_cmd(iob);
        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) {
                tmp = u64_to_user_ptr(oat_data.ptr);
                oat_data.response_len = priv.response_len;

                if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
                    copy_to_user(udata, &oat_data, sizeof(oat_data)))
                        rc = -EFAULT;
        }

out_free:
        vfree(priv.buffer);
        return rc;
}

static int qeth_init_link_info_oat_cb(struct qeth_card *card,
                                      struct qeth_reply *reply_priv,
                                      unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
        struct qeth_link_info *link_info = reply_priv->param;
        struct qeth_query_oat_physical_if *phys_if;
        struct qeth_query_oat_reply *reply;

        QETH_CARD_TEXT(card, 2, "qoatincb");
        if (qeth_setadpparms_inspect_rc(cmd))
                return -EIO;

        /* Multi-part reply is unexpected, don't bother: */
        if (cmd->data.setadapterparms.hdr.used_total > 1)
                return -EINVAL;

        /* Expect the reply to start with phys_if data: */
        reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
        if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
            reply->length < sizeof(*reply))
                return -EINVAL;

        phys_if = &reply->phys_if;

        switch (phys_if->speed_duplex) {
        case QETH_QOAT_PHYS_SPEED_10M_HALF:
                link_info->speed = SPEED_10;
                link_info->duplex = DUPLEX_HALF;
                break;
        case QETH_QOAT_PHYS_SPEED_10M_FULL:
                link_info->speed = SPEED_10;
                link_info->duplex = DUPLEX_FULL;
                break;
        case QETH_QOAT_PHYS_SPEED_100M_HALF:
                link_info->speed = SPEED_100;
                link_info->duplex = DUPLEX_HALF;
                break;
        case QETH_QOAT_PHYS_SPEED_100M_FULL:
                link_info->speed = SPEED_100;
                link_info->duplex = DUPLEX_FULL;
                break;
        case QETH_QOAT_PHYS_SPEED_1000M_HALF:
                link_info->speed = SPEED_1000;
                link_info->duplex = DUPLEX_HALF;
                break;
        case QETH_QOAT_PHYS_SPEED_1000M_FULL:
                link_info->speed = SPEED_1000;
                link_info->duplex = DUPLEX_FULL;
                break;
        case QETH_QOAT_PHYS_SPEED_10G_FULL:
                link_info->speed = SPEED_10000;
                link_info->duplex = DUPLEX_FULL;
                break;
        case QETH_QOAT_PHYS_SPEED_25G_FULL:
                link_info->speed = SPEED_25000;
                link_info->duplex = DUPLEX_FULL;
                break;
        case QETH_QOAT_PHYS_SPEED_UNKNOWN:
        default:
                link_info->speed = SPEED_UNKNOWN;
                link_info->duplex = DUPLEX_UNKNOWN;
                break;
        }

        switch (phys_if->media_type) {
        case QETH_QOAT_PHYS_MEDIA_COPPER:
                link_info->port = PORT_TP;
                link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
                break;
        case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
                link_info->port = PORT_FIBRE;
                link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
                break;
        case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
                link_info->port = PORT_FIBRE;
                link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
                break;
        default:
                link_info->port = PORT_OTHER;
                link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
                break;
        }

        return 0;
}

static void qeth_init_link_info(struct qeth_card *card)
{
        qeth_default_link_info(card);

        /* Get more accurate data via QUERY OAT: */
        if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
                struct qeth_link_info link_info;
                struct qeth_cmd_buffer *iob;

                iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
                                           SETADP_DATA_SIZEOF(query_oat));
                if (iob) {
                        struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
                        struct qeth_query_oat *oat_req;

                        oat_req = &cmd->data.setadapterparms.data.query_oat;
                        oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;

                        if (!qeth_send_ipa_cmd(card, iob,
                                               qeth_init_link_info_oat_cb,
                                               &link_info)) {
                                if (link_info.speed != SPEED_UNKNOWN)
                                        card->info.link_info.speed = link_info.speed;
                                if (link_info.duplex != DUPLEX_UNKNOWN)
                                        card->info.link_info.duplex = link_info.duplex;
                                if (link_info.port != PORT_OTHER)
                                        card->info.link_info.port = link_info.port;
                                if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
                                        card->info.link_info.link_mode = link_info.link_mode;
                        }
                }
        }
}

/**
 * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
 * @card: pointer to a qeth_card
 *
 * Returns
 *      0, if a MAC address has been set for the card's netdevice
 *      a return code, for various error conditions
 */
int qeth_vm_request_mac(struct qeth_card *card)
{
        struct diag26c_mac_resp *response;
        struct diag26c_mac_req *request;
        int rc;

        QETH_CARD_TEXT(card, 2, "vmreqmac");

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

        request->resp_buf_len = sizeof(*response);
        request->resp_version = DIAG26C_VERSION2;
        request->op_code = DIAG26C_GET_MAC;
        request->devno = card->info.ddev_devno;

        QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
        rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
        QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
        if (rc)
                goto out;
        QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));

        if (request->resp_buf_len < sizeof(*response) ||
            response->version != request->resp_version) {
                rc = -EIO;
                QETH_CARD_TEXT(card, 2, "badresp");
                QETH_CARD_HEX(card, 2, &request->resp_buf_len,
                              sizeof(request->resp_buf_len));
        } else if (!is_valid_ether_addr(response->mac)) {
                rc = -EINVAL;
                QETH_CARD_TEXT(card, 2, "badmac");
                QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
        } else {
                eth_hw_addr_set(card->dev, response->mac);
        }

out:
        kfree(response);
        kfree(request);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_vm_request_mac);

static void qeth_determine_capabilities(struct qeth_card *card)
{
        struct qeth_channel *channel = &card->data;
        struct ccw_device *ddev = channel->ccwdev;
        int rc;
        int ddev_offline = 0;

        QETH_CARD_TEXT(card, 2, "detcapab");
        if (!ddev->online) {
                ddev_offline = 1;
                rc = qeth_start_channel(channel);
                if (rc) {
                        QETH_CARD_TEXT_(card, 2, "3err%d", rc);
                        goto out;
                }
        }

        rc = qeth_read_conf_data(card);
        if (rc) {
                QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
                                 CARD_DEVID(card), rc);
                QETH_CARD_TEXT_(card, 2, "5err%d", rc);
                goto out_offline;
        }

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

        QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
        QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
        QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
        QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
        QETH_CARD_TEXT_(card, 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)
                qeth_stop_channel(channel);
out:
        return;
}

static void qeth_read_ccw_conf_data(struct qeth_card *card)
{
        struct qeth_card_info *info = &card->info;
        struct ccw_device *cdev = CARD_DDEV(card);
        struct ccw_dev_id dev_id;

        QETH_CARD_TEXT(card, 2, "ccwconfd");
        ccw_device_get_id(cdev, &dev_id);

        info->ddev_devno = dev_id.devno;
        info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
                          !ccw_device_get_iid(cdev, &info->iid) &&
                          !ccw_device_get_chid(cdev, 0, &info->chid);
        info->ssid = dev_id.ssid;

        dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
                 info->chid, info->chpid);

        QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
        QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
        QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
        QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
        QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
        QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
        QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
}

static int qeth_qdio_establish(struct qeth_card *card)
{
        struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
        struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
        struct qeth_qib_parms *qib_parms = NULL;
        struct qdio_initialize init_data;
        unsigned int no_input_qs = 1;
        unsigned int i;
        int rc = 0;

        QETH_CARD_TEXT(card, 2, "qdioest");

        if (!IS_IQD(card) && !IS_VM_NIC(card)) {
                qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
                if (!qib_parms)
                        return -ENOMEM;

                qeth_fill_qib_parms(card, qib_parms);
        }

        in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
        if (card->options.cq == QETH_CQ_ENABLED) {
                in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
                no_input_qs++;
        }

        for (i = 0; i < card->qdio.no_out_queues; i++)
                out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;

        memset(&init_data, 0, sizeof(struct qdio_initialize));
        init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
                                                          QDIO_QETH_QFMT;
        init_data.qib_param_field_format = 0;
        init_data.qib_param_field        = (void *)qib_parms;
        init_data.no_input_qs            = no_input_qs;
        init_data.no_output_qs           = card->qdio.no_out_queues;
        init_data.input_handler          = qeth_qdio_input_handler;
        init_data.output_handler         = qeth_qdio_output_handler;
        init_data.irq_poll               = qeth_qdio_poll;
        init_data.int_parm               = (unsigned long) card;
        init_data.input_sbal_addr_array  = in_sbal_ptrs;
        init_data.output_sbal_addr_array = out_sbal_ptrs;

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

static void qeth_core_free_card(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "freecrd");

        unregister_service_level(&card->qeth_service_level);
        debugfs_remove_recursive(card->debugfs);
        qeth_put_cmd(card->read_cmd);
        destroy_workqueue(card->event_wq);
        dev_set_drvdata(&card->gdev->dev, NULL);
        kfree(card);
}

static void qeth_trace_features(struct qeth_card *card)
{
        QETH_CARD_TEXT(card, 2, "features");
        QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
        QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
        QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
        QETH_CARD_HEX(card, 2, &card->info.diagass_support,
                      sizeof(card->info.diagass_support));
}

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, 0x02, 0x1732, 0x03),
                                        .driver_info = QETH_CARD_TYPE_OSM},
#ifdef CONFIG_QETH_OSX
        {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
                                        .driver_info = QETH_CARD_TYPE_OSX},
#endif
        {},
};
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,
};

static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
{
        int retries = 3;
        int rc;

        QETH_CARD_TEXT(card, 2, "hrdsetup");
        atomic_set(&card->force_alloc_skb, 0);
        rc = qeth_update_from_chp_desc(card);
        if (rc)
                return rc;
retry:
        if (retries < 3)
                QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
                                 CARD_DEVID(card));
        rc = qeth_qdio_clear_card(card, !IS_IQD(card));
        qeth_stop_channel(&card->data);
        qeth_stop_channel(&card->write);
        qeth_stop_channel(&card->read);
        qdio_free(CARD_DDEV(card));

        rc = qeth_start_channel(&card->read);
        if (rc)
                goto retriable;
        rc = qeth_start_channel(&card->write);
        if (rc)
                goto retriable;
        rc = qeth_start_channel(&card->data);
        if (rc)
                goto retriable;
retriable:
        if (rc == -ERESTARTSYS) {
                QETH_CARD_TEXT(card, 2, "break1");
                return rc;
        } else if (rc) {
                QETH_CARD_TEXT_(card, 2, "1err%d", rc);
                if (--retries < 0)
                        goto out;
                else
                        goto retry;
        }

        qeth_determine_capabilities(card);
        qeth_read_ccw_conf_data(card);
        qeth_idx_init(card);

        rc = qeth_idx_activate_read_channel(card);
        if (rc == -EINTR) {
                QETH_CARD_TEXT(card, 2, "break2");
                return rc;
        } else if (rc) {
                QETH_CARD_TEXT_(card, 2, "3err%d", rc);
                if (--retries < 0)
                        goto out;
                else
                        goto retry;
        }

        rc = qeth_idx_activate_write_channel(card);
        if (rc == -EINTR) {
                QETH_CARD_TEXT(card, 2, "break3");
                return rc;
        } else if (rc) {
                QETH_CARD_TEXT_(card, 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_CARD_TEXT_(card, 2, "5err%d", rc);
                goto out;
        }

        rc = qeth_send_startlan(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "6err%d", rc);
                if (rc == -ENETDOWN) {
                        dev_warn(&card->gdev->dev, "The LAN is offline\n");
                        *carrier_ok = false;
                } else {
                        goto out;
                }
        } else {
                *carrier_ok = true;
        }

        card->options.ipa4.supported = 0;
        card->options.ipa6.supported = 0;
        card->options.adp.supported = 0;
        card->options.sbp.supported_funcs = 0;
        card->info.diagass_support = 0;
        rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
        if (rc == -ENOMEM)
                goto out;
        if (qeth_is_supported(card, IPA_IPV6)) {
                rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
                if (rc == -ENOMEM)
                        goto out;
        }
        if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
                rc = qeth_query_setadapterparms(card);
                if (rc < 0) {
                        QETH_CARD_TEXT_(card, 2, "7err%d", rc);
                        goto out;
                }
        }
        if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
                rc = qeth_query_setdiagass(card);
                if (rc)
                        QETH_CARD_TEXT_(card, 2, "8err%d", rc);
        }

        qeth_trace_features(card);

        if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
            (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
                card->info.hwtrap = 0;

        if (card->options.isolation != ISOLATION_MODE_NONE) {
                rc = qeth_setadpparms_set_access_ctrl(card,
                                                      card->options.isolation);
                if (rc)
                        goto out;
        }

        qeth_init_link_info(card);

        rc = qeth_init_qdio_queues(card);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "9err%d", rc);
                goto out;
        }

        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, "Initialization for device %x failed in hardsetup! rc=%d\n",
                         CARD_DEVID(card), rc);
        return rc;
}

static int qeth_set_online(struct qeth_card *card,
                           const struct qeth_discipline *disc)
{
        bool carrier_ok;
        int rc;

        mutex_lock(&card->conf_mutex);
        QETH_CARD_TEXT(card, 2, "setonlin");

        rc = qeth_hardsetup_card(card, &carrier_ok);
        if (rc) {
                QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
                rc = -ENODEV;
                goto err_hardsetup;
        }

        qeth_print_status_message(card);

        if (card->dev->reg_state != NETREG_REGISTERED)
                /* no need for locking / error handling at this early stage: */
                qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));

        rc = disc->set_online(card, carrier_ok);
        if (rc)
                goto err_online;

        /* let user_space know that device is online */
        kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);

        mutex_unlock(&card->conf_mutex);
        return 0;

err_online:
err_hardsetup:
        qeth_qdio_clear_card(card, 0);
        qeth_clear_working_pool_list(card);
        qeth_flush_local_addrs(card);

        qeth_stop_channel(&card->data);
        qeth_stop_channel(&card->write);
        qeth_stop_channel(&card->read);
        qdio_free(CARD_DDEV(card));

        mutex_unlock(&card->conf_mutex);
        return rc;
}

int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
                     bool resetting)
{
        int rc, rc2, rc3;

        mutex_lock(&card->conf_mutex);
        QETH_CARD_TEXT(card, 3, "setoffl");

        if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
                qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
                card->info.hwtrap = 1;
        }

        /* cancel any stalled cmd that might block the rtnl: */
        qeth_clear_ipacmd_list(card);

        rtnl_lock();
        netif_device_detach(card->dev);
        netif_carrier_off(card->dev);
        rtnl_unlock();

        cancel_work_sync(&card->rx_mode_work);

        disc->set_offline(card);

        qeth_qdio_clear_card(card, 0);
        qeth_drain_output_queues(card);
        qeth_clear_working_pool_list(card);
        qeth_flush_local_addrs(card);
        card->info.promisc_mode = 0;
        qeth_default_link_info(card);

        rc  = qeth_stop_channel(&card->data);
        rc2 = qeth_stop_channel(&card->write);
        rc3 = qeth_stop_channel(&card->read);
        if (!rc)
                rc = (rc2) ? rc2 : rc3;
        if (rc)
                QETH_CARD_TEXT_(card, 2, "1err%d", rc);
        qdio_free(CARD_DDEV(card));

        /* let user_space know that device is offline */
        kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);

        mutex_unlock(&card->conf_mutex);
        return 0;
}
EXPORT_SYMBOL_GPL(qeth_set_offline);

static int qeth_do_reset(void *data)
{
        const struct qeth_discipline *disc;
        struct qeth_card *card = data;
        int rc;

        /* Lock-free, other users will block until we are done. */
        disc = card->discipline;

        QETH_CARD_TEXT(card, 2, "recover1");
        if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
                return 0;
        QETH_CARD_TEXT(card, 2, "recover2");
        dev_warn(&card->gdev->dev,
                 "A recovery process has been started for the device\n");

        qeth_set_offline(card, disc, true);
        rc = qeth_set_online(card, disc);
        if (!rc) {
                dev_info(&card->gdev->dev,
                         "Device successfully recovered!\n");
        } else {
                qeth_set_offline(card, disc, true);
                ccwgroup_set_offline(card->gdev, false);
                dev_warn(&card->gdev->dev,
                         "The qeth device driver failed to recover an error on the device\n");
        }
        qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
        qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
        return 0;
}

#if IS_ENABLED(CONFIG_QETH_L3)
static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
                                struct qeth_hdr *hdr)
{
        struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
        struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
        struct net_device *dev = skb->dev;

        if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
                dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
                                "FAKELL", skb->len);
                return;
        }

        if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
                u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
                                                             ETH_P_IP;
                unsigned char tg_addr[ETH_ALEN];

                skb_reset_network_header(skb);
                switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
                case QETH_CAST_MULTICAST:
                        if (prot == ETH_P_IP)
                                ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
                        else
                                ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
                        QETH_CARD_STAT_INC(card, rx_multicast);
                        break;
                case QETH_CAST_BROADCAST:
                        ether_addr_copy(tg_addr, dev->broadcast);
                        QETH_CARD_STAT_INC(card, rx_multicast);
                        break;
                default:
                        if (card->options.sniffer)
                                skb->pkt_type = PACKET_OTHERHOST;
                        ether_addr_copy(tg_addr, dev->dev_addr);
                }

                if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
                        dev_hard_header(skb, dev, prot, tg_addr,
                                        &l3_hdr->next_hop.rx.src_mac, skb->len);
                else
                        dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
                                        skb->len);
        }

        /* copy VLAN tag from hdr into skb */
        if (!card->options.sniffer &&
            (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
                                  QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
                u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
                                l3_hdr->vlan_id :
                                l3_hdr->next_hop.rx.vlan_id;

                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
        }
}
#endif

static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
                             bool uses_frags, bool is_cso)
{
        struct napi_struct *napi = &card->napi;

        if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
                skb->ip_summed = CHECKSUM_UNNECESSARY;
                QETH_CARD_STAT_INC(card, rx_skb_csum);
        } else {
                skb->ip_summed = CHECKSUM_NONE;
        }

        QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
        QETH_CARD_STAT_INC(card, rx_packets);
        if (skb_is_nonlinear(skb)) {
                QETH_CARD_STAT_INC(card, rx_sg_skbs);
                QETH_CARD_STAT_ADD(card, rx_sg_frags,
                                   skb_shinfo(skb)->nr_frags);
        }

        if (uses_frags) {
                napi_gro_frags(napi);
        } else {
                skb->protocol = eth_type_trans(skb, skb->dev);
                napi_gro_receive(napi, skb);
        }
}

static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
{
        struct page *page = virt_to_page(data);
        unsigned int next_frag;

        next_frag = skb_shinfo(skb)->nr_frags;
        get_page(page);
        skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
                        data_len);
}

static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
{
        return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
}

static int qeth_extract_skb(struct qeth_card *card,
                            struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
                            int *__offset)
{
        struct qeth_priv *priv = netdev_priv(card->dev);
        struct qdio_buffer *buffer = qethbuffer->buffer;
        struct napi_struct *napi = &card->napi;
        struct qdio_buffer_element *element;
        unsigned int linear_len = 0;
        bool uses_frags = false;
        int offset = *__offset;
        bool use_rx_sg = false;
        unsigned int headroom;
        struct qeth_hdr *hdr;
        struct sk_buff *skb;
        int skb_len = 0;
        bool is_cso;

        element = &buffer->element[*element_no];

next_packet:
        /* qeth_hdr must not cross element boundaries */
        while (element->length < offset + sizeof(struct qeth_hdr)) {
                if (qeth_is_last_sbale(element))
                        return -ENODATA;
                element++;
                offset = 0;
        }

        hdr = dma64_to_virt(element->addr) + offset;
        offset += sizeof(*hdr);
        skb = NULL;

        switch (hdr->hdr.l2.id) {
        case QETH_HEADER_TYPE_LAYER2:
                skb_len = hdr->hdr.l2.pkt_length;
                is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;

                linear_len = ETH_HLEN;
                headroom = 0;
                break;
        case QETH_HEADER_TYPE_LAYER3:
                skb_len = hdr->hdr.l3.length;
                is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;

                if (!IS_LAYER3(card)) {
                        QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
                        goto walk_packet;
                }

                if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
                        linear_len = ETH_HLEN;
                        headroom = 0;
                        break;
                }

                if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
                        linear_len = sizeof(struct ipv6hdr);
                else
                        linear_len = sizeof(struct iphdr);
                headroom = ETH_HLEN;
                break;
        default:
                if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
                        QETH_CARD_STAT_INC(card, rx_frame_errors);
                else
                        QETH_CARD_STAT_INC(card, rx_dropped_notsupp);

                /* Can't determine packet length, drop the whole buffer. */
                return -EPROTONOSUPPORT;
        }

        if (skb_len < linear_len) {
                QETH_CARD_STAT_INC(card, rx_dropped_runt);
                goto walk_packet;
        }

        use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
                    (skb_len > READ_ONCE(priv->rx_copybreak) &&
                     !atomic_read(&card->force_alloc_skb));

        if (use_rx_sg) {
                /* QETH_CQ_ENABLED only: */
                if (qethbuffer->rx_skb &&
                    skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
                        skb = qethbuffer->rx_skb;
                        qethbuffer->rx_skb = NULL;
                        goto use_skb;
                }

                skb = napi_get_frags(napi);
                if (!skb) {
                        /* -ENOMEM, no point in falling back further. */
                        QETH_CARD_STAT_INC(card, rx_dropped_nomem);
                        goto walk_packet;
                }

                if (skb_tailroom(skb) >= linear_len + headroom) {
                        uses_frags = true;
                        goto use_skb;
                }

                netdev_info_once(card->dev,
                                 "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
                                 linear_len + headroom, skb_tailroom(skb));
                /* Shouldn't happen. Don't optimize, fall back to linear skb. */
        }

        linear_len = skb_len;
        skb = napi_alloc_skb(napi, linear_len + headroom);
        if (!skb) {
                QETH_CARD_STAT_INC(card, rx_dropped_nomem);
                goto walk_packet;
        }

use_skb:
        if (headroom)
                skb_reserve(skb, headroom);
walk_packet:
        while (skb_len) {
                int data_len = min(skb_len, (int)(element->length - offset));
                char *data = dma64_to_virt(element->addr) + offset;

                skb_len -= data_len;
                offset += data_len;

                /* Extract data from current element: */
                if (skb && data_len) {
                        if (linear_len) {
                                unsigned int copy_len;

                                copy_len = min_t(unsigned int, linear_len,
                                                 data_len);

                                skb_put_data(skb, data, copy_len);
                                linear_len -= copy_len;
                                data_len -= copy_len;
                                data += copy_len;
                        }

                        if (data_len)
                                qeth_create_skb_frag(skb, data, data_len);
                }

                /* Step forward to next element: */
                if (skb_len) {
                        if (qeth_is_last_sbale(element)) {
                                QETH_CARD_TEXT(card, 4, "unexeob");
                                QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
                                if (skb) {
                                        if (uses_frags)
                                                napi_free_frags(napi);
                                        else
                                                kfree_skb(skb);
                                        QETH_CARD_STAT_INC(card,
                                                           rx_length_errors);
                                }
                                return -EMSGSIZE;
                        }
                        element++;
                        offset = 0;
                }
        }

        /* This packet was skipped, go get another one: */
        if (!skb)
                goto next_packet;

        *element_no = element - &buffer->element[0];
        *__offset = offset;

#if IS_ENABLED(CONFIG_QETH_L3)
        if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
                qeth_l3_rebuild_skb(card, skb, hdr);
#endif

        qeth_receive_skb(card, skb, uses_frags, is_cso);
        return 0;
}

static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
                                      struct qeth_qdio_buffer *buf, bool *done)
{
        unsigned int work_done = 0;

        while (budget) {
                if (qeth_extract_skb(card, buf, &card->rx.buf_element,
                                     &card->rx.e_offset)) {
                        *done = true;
                        break;
                }

                work_done++;
                budget--;
        }

        return work_done;
}

static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
{
        struct qeth_rx *ctx = &card->rx;
        unsigned int work_done = 0;

        while (budget > 0) {
                struct qeth_qdio_buffer *buffer;
                unsigned int skbs_done = 0;
                bool done = false;

                /* Fetch completed RX buffers: */
                if (!card->rx.b_count) {
                        card->rx.qdio_err = 0;
                        card->rx.b_count =
                                qdio_inspect_input_queue(CARD_DDEV(card), 0,
                                                         &card->rx.b_index,
                                                         &card->rx.qdio_err);
                        if (card->rx.b_count <= 0) {
                                card->rx.b_count = 0;
                                break;
                        }
                }

                /* Process one completed RX buffer: */
                buffer = &card->qdio.in_q->bufs[card->rx.b_index];
                if (!(card->rx.qdio_err &&
                      qeth_check_qdio_errors(card, buffer->buffer,
                                             card->rx.qdio_err, "qinerr")))
                        skbs_done = qeth_extract_skbs(card, budget, buffer,
                                                      &done);
                else
                        done = true;

                work_done += skbs_done;
                budget -= skbs_done;

                if (done) {
                        QETH_CARD_STAT_INC(card, rx_bufs);
                        qeth_put_buffer_pool_entry(card, buffer->pool_entry);
                        buffer->pool_entry = NULL;
                        card->rx.b_count--;
                        ctx->bufs_refill++;
                        ctx->bufs_refill -= qeth_rx_refill_queue(card,
                                                                 ctx->bufs_refill);

                        /* Step forward to next buffer: */
                        card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
                        card->rx.buf_element = 0;
                        card->rx.e_offset = 0;
                }
        }

        return work_done;
}

static void qeth_cq_poll(struct qeth_card *card)
{
        unsigned int work_done = 0;

        while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
                unsigned int start, error;
                int completed;

                completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
                                                     &error);
                if (completed <= 0)
                        return;

                qeth_qdio_cq_handler(card, error, 1, start, completed);
                work_done += completed;
        }
}

int qeth_poll(struct napi_struct *napi, int budget)
{
        struct qeth_card *card = container_of(napi, struct qeth_card, napi);
        unsigned int work_done;

        work_done = qeth_rx_poll(card, budget);

        if (qeth_use_tx_irqs(card)) {
                struct qeth_qdio_out_q *queue;
                unsigned int i;

                qeth_for_each_output_queue(card, queue, i) {
                        if (!qeth_out_queue_is_empty(queue))
                                napi_schedule(&queue->napi);
                }
        }

        if (card->options.cq == QETH_CQ_ENABLED)
                qeth_cq_poll(card);

        if (budget) {
                struct qeth_rx *ctx = &card->rx;

                /* Process any substantial refill backlog: */
                ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);

                /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
                if (work_done >= budget)
                        return work_done;
        }

        if (napi_complete_done(napi, work_done) &&
            qdio_start_irq(CARD_DDEV(card)))
                napi_schedule(napi);

        return work_done;
}
EXPORT_SYMBOL_GPL(qeth_poll);

static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
                                 unsigned int bidx, unsigned int qdio_error,
                                 int budget)
{
        struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
        u8 sflags = buffer->buffer->element[15].sflags;
        struct qeth_card *card = queue->card;
        bool error = !!qdio_error;

        if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
                struct qaob *aob = buffer->aob;
                struct qeth_qaob_priv1 *priv;
                enum iucv_tx_notify notify;

                if (!aob) {
                        netdev_WARN_ONCE(card->dev,
                                         "Pending TX buffer %#x without QAOB on TX queue %u\n",
                                         bidx, queue->queue_no);
                        qeth_schedule_recovery(card);
                        return;
                }

                QETH_CARD_TEXT_(card, 5, "pel%u", bidx);

                priv = (struct qeth_qaob_priv1 *)&aob->user1;
                /* QAOB hasn't completed yet: */
                if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
                        qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);

                        /* Prepare the queue slot for immediate re-use: */
                        qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
                        if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
                                QETH_CARD_TEXT(card, 2, "outofbuf");
                                qeth_schedule_recovery(card);
                        }

                        list_add(&buffer->list_entry, &queue->pending_bufs);
                        /* Skip clearing the buffer: */
                        return;
                }

                /* QAOB already completed: */
                notify = qeth_compute_cq_notification(aob->aorc, 0);
                qeth_notify_skbs(queue, buffer, notify);
                error = !!aob->aorc;
                memset(aob, 0, sizeof(*aob));
        } else if (card->options.cq == QETH_CQ_ENABLED) {
                qeth_notify_skbs(queue, buffer,
                                 qeth_compute_cq_notification(sflags, 0));
        }

        qeth_clear_output_buffer(queue, buffer, error, budget);
}

static int qeth_tx_poll(struct napi_struct *napi, int budget)
{
        struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
        unsigned int queue_no = queue->queue_no;
        struct qeth_card *card = queue->card;
        struct net_device *dev = card->dev;
        unsigned int work_done = 0;
        struct netdev_queue *txq;

        if (IS_IQD(card))
                txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
        else
                txq = netdev_get_tx_queue(dev, queue_no);

        while (1) {
                unsigned int start, error, i;
                unsigned int packets = 0;
                unsigned int bytes = 0;
                int completed;

                qeth_tx_complete_pending_bufs(card, queue, false, budget);

                if (qeth_out_queue_is_empty(queue)) {
                        napi_complete(napi);
                        return 0;
                }

                /* Give the CPU a breather: */
                if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
                        QETH_TXQ_STAT_INC(queue, completion_yield);
                        if (napi_complete_done(napi, 0))
                                napi_schedule(napi);
                        return 0;
                }

                completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
                                                      &start, &error);
                if (completed <= 0) {
                        /* Ensure we see TX completion for pending work: */
                        if (napi_complete_done(napi, 0) &&
                            !atomic_read(&queue->set_pci_flags_count))
                                qeth_tx_arm_timer(queue, queue->rescan_usecs);
                        return 0;
                }

                for (i = start; i < start + completed; i++) {
                        struct qeth_qdio_out_buffer *buffer;
                        unsigned int bidx = QDIO_BUFNR(i);

                        buffer = queue->bufs[bidx];
                        packets += buffer->frames;
                        bytes += buffer->bytes;

                        qeth_handle_send_error(card, buffer, error);
                        if (IS_IQD(card))
                                qeth_iqd_tx_complete(queue, bidx, error, budget);
                        else
                                qeth_clear_output_buffer(queue, buffer, error,
                                                         budget);
                }

                atomic_sub(completed, &queue->used_buffers);
                work_done += completed;
                if (IS_IQD(card))
                        netdev_tx_completed_queue(txq, packets, bytes);
                else
                        qeth_check_outbound_queue(queue);

                /* xmit may have observed the full-condition, but not yet
                 * stopped the txq. In which case the code below won't trigger.
                 * So before returning, xmit will re-check the txq's fill level
                 * and wake it up if needed.
                 */
                if (netif_tx_queue_stopped(txq) &&
                    !qeth_out_queue_is_full(queue))
                        netif_tx_wake_queue(txq);
        }
}

static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
{
        if (!cmd->hdr.return_code)
                cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
        return cmd->hdr.return_code;
}

static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
                                        struct qeth_reply *reply,
                                        unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        struct qeth_ipa_caps *caps = reply->param;

        if (qeth_setassparms_inspect_rc(cmd))
                return -EIO;

        caps->supported = cmd->data.setassparms.data.caps.supported;
        caps->enabled = cmd->data.setassparms.data.caps.enabled;
        return 0;
}

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

        QETH_CARD_TEXT(card, 4, "defadpcb");

        if (cmd->hdr.return_code)
                return -EIO;

        cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
        if (cmd->hdr.prot_version == QETH_PROT_IPV4)
                card->options.ipa4.enabled = cmd->hdr.assists.enabled;
        if (cmd->hdr.prot_version == QETH_PROT_IPV6)
                card->options.ipa6.enabled = cmd->hdr.assists.enabled;
        return 0;
}
EXPORT_SYMBOL_GPL(qeth_setassparms_cb);

struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
                                                 enum qeth_ipa_funcs ipa_func,
                                                 u16 cmd_code,
                                                 unsigned int data_length,
                                                 enum qeth_prot_versions prot)
{
        struct qeth_ipacmd_setassparms *setassparms;
        struct qeth_ipacmd_setassparms_hdr *hdr;
        struct qeth_cmd_buffer *iob;

        QETH_CARD_TEXT(card, 4, "getasscm");
        iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
                                 data_length +
                                 offsetof(struct qeth_ipacmd_setassparms,
                                          data));
        if (!iob)
                return NULL;

        setassparms = &__ipa_cmd(iob)->data.setassparms;
        setassparms->assist_no = ipa_func;

        hdr = &setassparms->hdr;
        hdr->length = sizeof(*hdr) + data_length;
        hdr->command_code = cmd_code;
        return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);

int qeth_send_simple_setassparms_prot(struct qeth_card *card,
                                      enum qeth_ipa_funcs ipa_func,
                                      u16 cmd_code, u32 *data,
                                      enum qeth_prot_versions prot)
{
        unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
        struct qeth_cmd_buffer *iob;

        QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
        iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
        if (!iob)
                return -ENOMEM;

        if (data)
                __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
        return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
}
EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);

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 (!debug_level_enabled(id, level))
                return;
        va_start(args, fmt);
        vscnprintf(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;
}

static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */

int qeth_setup_discipline(struct qeth_card *card,
                          enum qeth_discipline_id discipline)
{
        int rc;

        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;
        default:
                break;
        }
        mutex_unlock(&qeth_mod_mutex);

        if (!card->discipline) {
                dev_err(&card->gdev->dev, "There is no kernel module to "
                        "support discipline %d\n", discipline);
                return -EINVAL;
        }

        rc = card->discipline->setup(card->gdev);
        if (rc) {
                if (discipline == QETH_DISCIPLINE_LAYER2)
                        symbol_put(qeth_l2_discipline);
                else
                        symbol_put(qeth_l3_discipline);
                card->discipline = NULL;

                return rc;
        }

        card->options.layer = discipline;
        return 0;
}

void qeth_remove_discipline(struct qeth_card *card)
{
        card->discipline->remove(card->gdev);

        if (IS_LAYER2(card))
                symbol_put(qeth_l2_discipline);
        else
                symbol_put(qeth_l3_discipline);
        card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
        card->discipline = NULL;
}

static const struct device_type qeth_generic_devtype = {
        .name = "qeth_generic",
};

#define DBF_NAME_LEN    20

struct qeth_dbf_entry {
        char dbf_name[DBF_NAME_LEN];
        debug_info_t *dbf_info;
        struct list_head dbf_list;
};

static LIST_HEAD(qeth_dbf_list);
static DEFINE_MUTEX(qeth_dbf_list_mutex);

static debug_info_t *qeth_get_dbf_entry(char *name)
{
        struct qeth_dbf_entry *entry;
        debug_info_t *rc = NULL;

        mutex_lock(&qeth_dbf_list_mutex);
        list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
                if (strcmp(entry->dbf_name, name) == 0) {
                        rc = entry->dbf_info;
                        break;
                }
        }
        mutex_unlock(&qeth_dbf_list_mutex);
        return rc;
}

static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
{
        struct qeth_dbf_entry *new_entry;

        card->debug = debug_register(name, 2, 1, 8);
        if (!card->debug) {
                QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
                goto err;
        }
        if (debug_register_view(card->debug, &debug_hex_ascii_view))
                goto err_dbg;
        new_entry = kzalloc_obj(struct qeth_dbf_entry);
        if (!new_entry)
                goto err_dbg;
        strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name));
        new_entry->dbf_info = card->debug;
        mutex_lock(&qeth_dbf_list_mutex);
        list_add(&new_entry->dbf_list, &qeth_dbf_list);
        mutex_unlock(&qeth_dbf_list_mutex);

        return 0;

err_dbg:
        debug_unregister(card->debug);
err:
        return -ENOMEM;
}

static void qeth_clear_dbf_list(void)
{
        struct qeth_dbf_entry *entry, *tmp;

        mutex_lock(&qeth_dbf_list_mutex);
        list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
                list_del(&entry->dbf_list);
                debug_unregister(entry->dbf_info);
                kfree(entry);
        }
        mutex_unlock(&qeth_dbf_list_mutex);
}

static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
{
        struct net_device *dev;
        struct qeth_priv *priv;

        switch (card->info.type) {
        case QETH_CARD_TYPE_IQD:
                dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
                                       ether_setup, QETH_MAX_OUT_QUEUES, 1);
                break;
        case QETH_CARD_TYPE_OSM:
                dev = alloc_etherdev(sizeof(*priv));
                break;
        default:
                dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
        }

        if (!dev)
                return NULL;

        priv = netdev_priv(dev);
        priv->rx_copybreak = QETH_RX_COPYBREAK;
        priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;

        dev->ml_priv = card;
        dev->watchdog_timeo = QETH_TX_TIMEOUT;
        dev->min_mtu = 576;
         /* initialized when device first goes online: */
        dev->max_mtu = 0;
        dev->mtu = 0;
        SET_NETDEV_DEV(dev, &card->gdev->dev);
        netif_carrier_off(dev);

        dev->ethtool_ops = &qeth_ethtool_ops;
        dev->priv_flags &= ~IFF_TX_SKB_SHARING;
        dev->hw_features |= NETIF_F_SG;
        dev->vlan_features |= NETIF_F_SG;
        if (IS_IQD(card))
                dev->features |= NETIF_F_SG;

        return dev;
}

struct net_device *qeth_clone_netdev(struct net_device *orig)
{
        struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);

        if (!clone)
                return NULL;

        clone->dev_port = orig->dev_port;
        return clone;
}

static int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
        struct qeth_card *card;
        struct device *dev;
        int rc;
        enum qeth_discipline_id enforced_disc;
        char dbf_name[DBF_NAME_LEN];

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

        scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
                  dev_name(&gdev->dev));
        card->debug = qeth_get_dbf_entry(dbf_name);
        if (!card->debug) {
                rc = qeth_add_dbf_entry(card, dbf_name);
                if (rc)
                        goto err_card;
        }

        qeth_setup_card(card);
        card->dev = qeth_alloc_netdev(card);
        if (!card->dev) {
                rc = -ENOMEM;
                goto err_card;
        }

        qeth_determine_capabilities(card);
        qeth_set_blkt_defaults(card);

        card->qdio.in_q = qeth_alloc_qdio_queue();
        if (!card->qdio.in_q) {
                rc = -ENOMEM;
                goto err_rx_queue;
        }

        card->qdio.no_out_queues = card->dev->num_tx_queues;
        rc = qeth_update_from_chp_desc(card);
        if (rc)
                goto err_chp_desc;

        gdev->dev.groups = qeth_dev_groups;

        enforced_disc = qeth_enforce_discipline(card);
        switch (enforced_disc) {
        case QETH_DISCIPLINE_UNDETERMINED:
                gdev->dev.type = &qeth_generic_devtype;
                break;
        default:
                card->info.layer_enforced = true;
                /* It's so early that we don't need the discipline_mutex yet. */
                rc = qeth_setup_discipline(card, enforced_disc);
                if (rc)
                        goto err_setup_disc;

                break;
        }

        return 0;

err_setup_disc:
err_chp_desc:
        qeth_free_qdio_queue(card->qdio.in_q);
err_rx_queue:
        free_netdev(card->dev);
err_card:
        qeth_core_free_card(card);
err_dev:
        put_device(dev);
        return rc;
}

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

        QETH_CARD_TEXT(card, 2, "removedv");

        mutex_lock(&card->discipline_mutex);
        if (card->discipline)
                qeth_remove_discipline(card);
        mutex_unlock(&card->discipline_mutex);

        qeth_free_qdio_queues(card);

        qeth_free_qdio_queue(card->qdio.in_q);
        free_netdev(card->dev);
        qeth_core_free_card(card);
        put_device(&gdev->dev);
}

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

        mutex_lock(&card->discipline_mutex);
        if (!card->discipline) {
                def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
                                                QETH_DISCIPLINE_LAYER2;
                rc = qeth_setup_discipline(card, def_discipline);
                if (rc)
                        goto err;
        }

        rc = qeth_set_online(card, card->discipline);

err:
        mutex_unlock(&card->discipline_mutex);
        return rc;
}

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

        mutex_lock(&card->discipline_mutex);
        rc = qeth_set_offline(card, card->discipline, false);
        mutex_unlock(&card->discipline_mutex);

        return rc;
}

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

        qeth_set_allowed_threads(card, 0, 1);
        if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
                qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
        qeth_qdio_clear_card(card, 0);
        qeth_drain_output_queues(card);
        qdio_free(CARD_DDEV(card));
}

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

        err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
                                  buf);

        return err ? err : count;
}
static DRIVER_ATTR_WO(group);

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 ccwgroup_driver qeth_core_ccwgroup_driver = {
        .driver = {
                .groups = qeth_drv_attr_groups,
                .owner = THIS_MODULE,
                .name = "qeth",
        },
        .ccw_driver = &qeth_ccw_driver,
        .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,
};

int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
{
        struct qeth_card *card = dev->ml_priv;
        int rc = 0;

        switch (cmd) {
        case SIOC_QETH_ADP_SET_SNMP_CONTROL:
                rc = qeth_snmp_command(card, data);
                break;
        case SIOC_QETH_GET_CARD_TYPE:
                if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
                    !IS_VM_NIC(card))
                        return 1;
                return 0;
        case SIOC_QETH_QUERY_OAT:
                rc = qeth_query_oat_command(card, data);
                break;
        default:
                rc = -EOPNOTSUPP;
        }
        if (rc)
                QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_siocdevprivate);

int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
        struct qeth_card *card = dev->ml_priv;
        struct mii_ioctl_data *mii_data;
        int rc = 0;

        switch (cmd) {
        case SIOCGMIIPHY:
                mii_data = if_mii(rq);
                mii_data->phy_id = 0;
                break;
        case SIOCGMIIREG:
                mii_data = if_mii(rq);
                if (mii_data->phy_id != 0)
                        rc = -EINVAL;
                else
                        mii_data->val_out = qeth_mdio_read(dev,
                                mii_data->phy_id, mii_data->reg_num);
                break;
        default:
                return -EOPNOTSUPP;
        }
        if (rc)
                QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
        return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_ioctl);

static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
                              unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        u32 *features = reply->param;

        if (qeth_setassparms_inspect_rc(cmd))
                return -EIO;

        *features = cmd->data.setassparms.data.flags_32bit;
        return 0;
}

static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
                             enum qeth_prot_versions prot)
{
        return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
                                                 NULL, prot);
}

static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
                            enum qeth_prot_versions prot, u8 *lp2lp)
{
        u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
        struct qeth_cmd_buffer *iob;
        struct qeth_ipa_caps caps;
        u32 features;
        int rc;

        /* some L3 HW requires combined L3+L4 csum offload: */
        if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
            cstype == IPA_OUTBOUND_CHECKSUM)
                required_features |= QETH_IPA_CHECKSUM_IP_HDR;

        iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
                                       prot);
        if (!iob)
                return -ENOMEM;

        rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
        if (rc)
                return rc;

        if ((required_features & features) != required_features) {
                qeth_set_csum_off(card, cstype, prot);
                return -EOPNOTSUPP;
        }

        iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
                                       SETASS_DATA_SIZEOF(flags_32bit),
                                       prot);
        if (!iob) {
                qeth_set_csum_off(card, cstype, prot);
                return -ENOMEM;
        }

        if (features & QETH_IPA_CHECKSUM_LP2LP)
                required_features |= QETH_IPA_CHECKSUM_LP2LP;
        __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
        rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
        if (rc) {
                qeth_set_csum_off(card, cstype, prot);
                return rc;
        }

        if (!qeth_ipa_caps_supported(&caps, required_features) ||
            !qeth_ipa_caps_enabled(&caps, required_features)) {
                qeth_set_csum_off(card, cstype, prot);
                return -EOPNOTSUPP;
        }

        dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
                 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);

        if (lp2lp)
                *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);

        return 0;
}

static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
                             enum qeth_prot_versions prot, u8 *lp2lp)
{
        return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
                    qeth_set_csum_off(card, cstype, prot);
}

static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
                             unsigned long data)
{
        struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
        struct qeth_tso_start_data *tso_data = reply->param;

        if (qeth_setassparms_inspect_rc(cmd))
                return -EIO;

        tso_data->mss = cmd->data.setassparms.data.tso.mss;
        tso_data->supported = cmd->data.setassparms.data.tso.supported;
        return 0;
}

static int qeth_set_tso_off(struct qeth_card *card,
                            enum qeth_prot_versions prot)
{
        return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
                                                 IPA_CMD_ASS_STOP, NULL, prot);
}

static int qeth_set_tso_on(struct qeth_card *card,
                           enum qeth_prot_versions prot)
{
        struct qeth_tso_start_data tso_data;
        struct qeth_cmd_buffer *iob;
        struct qeth_ipa_caps caps;
        int rc;

        iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
                                       IPA_CMD_ASS_START, 0, prot);
        if (!iob)
                return -ENOMEM;

        rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
        if (rc)
                return rc;

        if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
                qeth_set_tso_off(card, prot);
                return -EOPNOTSUPP;
        }

        iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
                                       IPA_CMD_ASS_ENABLE,
                                       SETASS_DATA_SIZEOF(caps), prot);
        if (!iob) {
                qeth_set_tso_off(card, prot);
                return -ENOMEM;
        }

        /* enable TSO capability */
        __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
                QETH_IPA_LARGE_SEND_TCP;
        rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
        if (rc) {
                qeth_set_tso_off(card, prot);
                return rc;
        }

        if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
            !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
                qeth_set_tso_off(card, prot);
                return -EOPNOTSUPP;
        }

        dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
                 tso_data.mss);
        return 0;
}

static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
                            enum qeth_prot_versions prot)
{
        return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
}

static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
{
        int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
        int rc_ipv6;

        if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
                rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
                                            QETH_PROT_IPV4, NULL);
        if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
                /* no/one Offload Assist available, so the rc is trivial */
                return rc_ipv4;

        rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
                                    QETH_PROT_IPV6, NULL);

        if (on)
                /* enable: success if any Assist is active */
                return (rc_ipv6) ? rc_ipv4 : 0;

        /* disable: failure if any Assist is still active */
        return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
}

/**
 * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
 * @dev:        a net_device
 */
void qeth_enable_hw_features(struct net_device *dev)
{
        struct qeth_card *card = dev->ml_priv;
        netdev_features_t features;

        features = dev->features;
        /* force-off any feature that might need an IPA sequence.
         * netdev_update_features() will restart them.
         */
        dev->features &= ~dev->hw_features;
        /* toggle VLAN filter, so that VIDs are re-programmed: */
        if (IS_LAYER2(card) && IS_VM_NIC(card)) {
                dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
                dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
        }
        netdev_update_features(dev);
        if (features != dev->features)
                dev_warn(&card->gdev->dev,
                         "Device recovery failed to restore all offload features\n");
}
EXPORT_SYMBOL_GPL(qeth_enable_hw_features);

static void qeth_check_restricted_features(struct qeth_card *card,
                                           netdev_features_t changed,
                                           netdev_features_t actual)
{
        netdev_features_t ipv6_features = NETIF_F_TSO6;
        netdev_features_t ipv4_features = NETIF_F_TSO;

        if (!card->info.has_lp2lp_cso_v6)
                ipv6_features |= NETIF_F_IPV6_CSUM;
        if (!card->info.has_lp2lp_cso_v4)
                ipv4_features |= NETIF_F_IP_CSUM;

        if ((changed & ipv6_features) && !(actual & ipv6_features))
                qeth_flush_local_addrs6(card);
        if ((changed & ipv4_features) && !(actual & ipv4_features))
                qeth_flush_local_addrs4(card);
}

int qeth_set_features(struct net_device *dev, netdev_features_t features)
{
        struct qeth_card *card = dev->ml_priv;
        netdev_features_t changed = dev->features ^ features;
        int rc = 0;

        QETH_CARD_TEXT(card, 2, "setfeat");
        QETH_CARD_HEX(card, 2, &features, sizeof(features));

        if ((changed & NETIF_F_IP_CSUM)) {
                rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
                                       IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
                                       &card->info.has_lp2lp_cso_v4);
                if (rc)
                        changed ^= NETIF_F_IP_CSUM;
        }
        if (changed & NETIF_F_IPV6_CSUM) {
                rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
                                       IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
                                       &card->info.has_lp2lp_cso_v6);
                if (rc)
                        changed ^= NETIF_F_IPV6_CSUM;
        }
        if (changed & NETIF_F_RXCSUM) {
                rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
                if (rc)
                        changed ^= NETIF_F_RXCSUM;
        }
        if (changed & NETIF_F_TSO) {
                rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
                                      QETH_PROT_IPV4);
                if (rc)
                        changed ^= NETIF_F_TSO;
        }
        if (changed & NETIF_F_TSO6) {
                rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
                                      QETH_PROT_IPV6);
                if (rc)
                        changed ^= NETIF_F_TSO6;
        }

        qeth_check_restricted_features(card, dev->features ^ features,
                                       dev->features ^ changed);

        /* everything changed successfully? */
        if ((dev->features ^ features) == changed)
                return 0;
        /* something went wrong. save changed features and return error */
        dev->features ^= changed;
        return -EIO;
}
EXPORT_SYMBOL_GPL(qeth_set_features);

netdev_features_t qeth_fix_features(struct net_device *dev,
                                    netdev_features_t features)
{
        struct qeth_card *card = dev->ml_priv;

        QETH_CARD_TEXT(card, 2, "fixfeat");
        if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
                features &= ~NETIF_F_IP_CSUM;
        if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
                features &= ~NETIF_F_IPV6_CSUM;
        if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
            !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
                features &= ~NETIF_F_RXCSUM;
        if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
                features &= ~NETIF_F_TSO;
        if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
                features &= ~NETIF_F_TSO6;

        QETH_CARD_HEX(card, 2, &features, sizeof(features));
        return features;
}
EXPORT_SYMBOL_GPL(qeth_fix_features);

netdev_features_t qeth_features_check(struct sk_buff *skb,
                                      struct net_device *dev,
                                      netdev_features_t features)
{
        struct qeth_card *card = dev->ml_priv;

        /* Traffic with local next-hop is not eligible for some offloads: */
        if (skb->ip_summed == CHECKSUM_PARTIAL &&
            READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
                netdev_features_t restricted = 0;

                if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
                        restricted |= NETIF_F_ALL_TSO;

                switch (vlan_get_protocol(skb)) {
                case htons(ETH_P_IP):
                        if (!card->info.has_lp2lp_cso_v4)
                                restricted |= NETIF_F_IP_CSUM;

                        if (restricted && qeth_next_hop_is_local_v4(card, skb))
                                features &= ~restricted;
                        break;
                case htons(ETH_P_IPV6):
                        if (!card->info.has_lp2lp_cso_v6)
                                restricted |= NETIF_F_IPV6_CSUM;

                        if (restricted && qeth_next_hop_is_local_v6(card, skb))
                                features &= ~restricted;
                        break;
                default:
                        break;
                }
        }

        /* GSO segmentation builds skbs with
         *      a (small) linear part for the headers, and
         *      page frags for the data.
         * Compared to a linear skb, the header-only part consumes an
         * additional buffer element. This reduces buffer utilization, and
         * hurts throughput. So compress small segments into one element.
         */
        if (netif_needs_gso(skb, features)) {
                /* match skb_segment(): */
                unsigned int doffset = skb->data - skb_mac_header(skb);
                unsigned int hsize = skb_shinfo(skb)->gso_size;
                unsigned int hroom = skb_headroom(skb);

                /* linearize only if resulting skb allocations are order-0: */
                if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
                        features &= ~NETIF_F_SG;
        }

        return vlan_features_check(skb, features);
}
EXPORT_SYMBOL_GPL(qeth_features_check);

void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
        struct qeth_card *card = dev->ml_priv;
        struct qeth_qdio_out_q *queue;
        unsigned int i;

        QETH_CARD_TEXT(card, 5, "getstat");

        stats->rx_packets = card->stats.rx_packets;
        stats->rx_bytes = card->stats.rx_bytes;
        stats->rx_errors = card->stats.rx_length_errors +
                           card->stats.rx_frame_errors +
                           card->stats.rx_fifo_errors;
        stats->rx_dropped = card->stats.rx_dropped_nomem +
                            card->stats.rx_dropped_notsupp +
                            card->stats.rx_dropped_runt;
        stats->multicast = card->stats.rx_multicast;
        stats->rx_length_errors = card->stats.rx_length_errors;
        stats->rx_frame_errors = card->stats.rx_frame_errors;
        stats->rx_fifo_errors = card->stats.rx_fifo_errors;

        for (i = 0; i < card->qdio.no_out_queues; i++) {
                queue = card->qdio.out_qs[i];

                stats->tx_packets += queue->stats.tx_packets;
                stats->tx_bytes += queue->stats.tx_bytes;
                stats->tx_errors += queue->stats.tx_errors;
                stats->tx_dropped += queue->stats.tx_dropped;
        }
}
EXPORT_SYMBOL_GPL(qeth_get_stats64);

#define TC_IQD_UCAST   0
static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
                                     unsigned int ucast_txqs)
{
        unsigned int prio;

        /* IQD requires mcast traffic to be placed on a dedicated queue, and
         * qeth_iqd_select_queue() deals with this.
         * For unicast traffic, we defer the queue selection to the stack.
         * By installing a trivial prio map that spans over only the unicast
         * queues, we can encourage the stack to spread the ucast traffic evenly
         * without selecting the mcast queue.
         */

        /* One traffic class, spanning over all active ucast queues: */
        netdev_set_num_tc(dev, 1);
        netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
                            QETH_IQD_MIN_UCAST_TXQ);

        /* Map all priorities to this traffic class: */
        for (prio = 0; prio <= TC_BITMASK; prio++)
                netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
}

int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
{
        struct net_device *dev = card->dev;
        int rc;

        /* Per netif_setup_tc(), adjust the mapping first: */
        if (IS_IQD(card))
                qeth_iqd_set_prio_tc_map(dev, count - 1);

        rc = netif_set_real_num_tx_queues(dev, count);

        if (rc && IS_IQD(card))
                qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);

        return rc;
}
EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);

u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
                          u8 cast_type, struct net_device *sb_dev)
{
        u16 txq;

        if (cast_type != RTN_UNICAST)
                return QETH_IQD_MCAST_TXQ;
        if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
                return QETH_IQD_MIN_UCAST_TXQ;

        txq = netdev_pick_tx(dev, skb, sb_dev);
        return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
}
EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);

u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
                          struct net_device *sb_dev)
{
        struct qeth_card *card = dev->ml_priv;

        if (qeth_uses_tx_prio_queueing(card))
                return qeth_get_priority_queue(card, skb);

        return netdev_pick_tx(dev, skb, sb_dev);
}
EXPORT_SYMBOL_GPL(qeth_osa_select_queue);

int qeth_open(struct net_device *dev)
{
        struct qeth_card *card = dev->ml_priv;
        struct qeth_qdio_out_q *queue;
        unsigned int i;

        QETH_CARD_TEXT(card, 4, "qethopen");

        card->data.state = CH_STATE_UP;
        netif_tx_start_all_queues(dev);

        qeth_for_each_output_queue(card, queue, i) {
                netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
                napi_enable(&queue->napi);
        }
        napi_enable(&card->napi);

        local_bh_disable();
        qeth_for_each_output_queue(card, queue, i) {
                napi_schedule(&queue->napi);
        }
        napi_schedule(&card->napi);
        /* kick-start the NAPI softirq: */
        local_bh_enable();

        return 0;
}
EXPORT_SYMBOL_GPL(qeth_open);

int qeth_stop(struct net_device *dev)
{
        struct qeth_card *card = dev->ml_priv;
        struct qeth_qdio_out_q *queue;
        unsigned int i;

        QETH_CARD_TEXT(card, 4, "qethstop");

        napi_disable(&card->napi);
        cancel_delayed_work_sync(&card->buffer_reclaim_work);
        qdio_stop_irq(CARD_DDEV(card));

        /* Quiesce the NAPI instances: */
        qeth_for_each_output_queue(card, queue, i)
                napi_disable(&queue->napi);

        /* Stop .ndo_start_xmit, might still access queue->napi. */
        netif_tx_disable(dev);

        qeth_for_each_output_queue(card, queue, i) {
                timer_delete_sync(&queue->timer);
                /* Queues may get re-allocated, so remove the NAPIs. */
                netif_napi_del(&queue->napi);
        }

        return 0;
}
EXPORT_SYMBOL_GPL(qeth_stop);

static int __init qeth_core_init(void)
{
        int rc;

        pr_info("loading core functions\n");

        qeth_debugfs_root = debugfs_create_dir("qeth", NULL);

        rc = qeth_register_dbf_views();
        if (rc)
                goto dbf_err;
        qeth_core_root_dev = root_device_register("qeth");
        rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
        if (rc)
                goto register_err;
        qeth_core_header_cache =
                kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
                                  roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
                                  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;
        }

        qeth_qaob_cache = kmem_cache_create("qeth_qaob",
                                            sizeof(struct qaob),
                                            sizeof(struct qaob),
                                            0, NULL);
        if (!qeth_qaob_cache) {
                rc = -ENOMEM;
                goto qaob_err;
        }

        rc = ccw_driver_register(&qeth_ccw_driver);
        if (rc)
                goto ccw_err;
        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_qaob_cache);
qaob_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();
dbf_err:
        debugfs_remove_recursive(qeth_debugfs_root);
        pr_err("Initializing the qeth device driver failed\n");
        return rc;
}

static void __exit qeth_core_exit(void)
{
        qeth_clear_dbf_list();
        ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
        ccw_driver_unregister(&qeth_ccw_driver);
        kmem_cache_destroy(qeth_qaob_cache);
        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();
        debugfs_remove_recursive(qeth_debugfs_root);
        pr_info("core functions removed\n");
}

module_init(qeth_core_init);
module_exit(qeth_core_exit);
MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
MODULE_DESCRIPTION("qeth core functions");
MODULE_LICENSE("GPL");