qeth_core_main.c

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

#define KMSG_COMPONENT "qeth"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/skbuff.h>

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

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

#include "qeth_core.h"

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

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

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

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

struct workqueue_struct *qeth_wq;
EXPORT_SYMBOL_GPL(qeth_wq);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (!q)
		return NULL;

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

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

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

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

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

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

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

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

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

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

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

	return n;
}

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

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

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

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

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


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

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

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

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

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

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

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

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

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

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

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

	return ret;
}

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 4, "clipalst");

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

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

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

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

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

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

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

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

	return NULL;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	card = CARD_FROM_CDEV(cdev);

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

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

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

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

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

	QETH_CARD_TEXT(card, 5, "irq");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	card->qdio.default_out_queue = 0;
}

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

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

	QETH_DBF_TEXT(SETUP, 2, "chp_desc");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 3, "clhacrd");

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

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

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

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "vmlayer");

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

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

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

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

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

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

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

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

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

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

	return disc;
}

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

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

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

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

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

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

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

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

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

	card = CARD_FROM_CDEV(channel->ccwdev);

	QETH_DBF_TEXT(SETUP, 2, "idxactch");

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

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

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

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

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

	QETH_DBF_TEXT(SETUP , 2, "idxwrcb");

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

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

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "sendctl");

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

	init_waitqueue_head(&reply->wait_q);

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

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

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

	timeout = jiffies + event_timeout;

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "cmenblcb");

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

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

	QETH_DBF_TEXT(SETUP, 2, "cmenable");

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

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

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

	struct qeth_cmd_buffer *iob;

	QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");

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

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

	QETH_DBF_TEXT(SETUP, 2, "cmsetup");

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

}

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "ulpenacb");

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

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

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

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

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

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

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

}

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

	QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");

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

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

	QETH_DBF_TEXT(SETUP, 2, "ulpsetup");

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

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

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

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

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

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

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

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

	if (!q)
		return NULL;

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

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

	QETH_DBF_TEXT(SETUP, 2, "allcqdbf");

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

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

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

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

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

	return 0;

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

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

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

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

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "dmact");

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "mpcinit");

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

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

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

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

	QETH_CARD_TEXT(card, 5, "inwrklst");

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

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

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

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

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

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

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "initqdqs");

	/* inbound queue */
	qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
	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 < card->qdio.in_buf_pool.buf_count - 1; ++i)
		qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
	card->qdio.in_q->next_buf_to_init =
		card->qdio.in_buf_pool.buf_count - 1;
	rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
		     card->qdio.in_buf_pool.buf_count - 1);
	if (rc) {
		QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
		return rc;
	}

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

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

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

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

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

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

	return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);

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

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

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

	QETH_CARD_TEXT(card, 4, "sendipa");

	if (card->options.layer2)
		if (card->info.type == QETH_CARD_TYPE_OSN)
			prot_type = QETH_PROT_OSN2;
		else
			prot_type = QETH_PROT_LAYER2;
	else
		prot_type = QETH_PROT_TCPIP;
	qeth_prepare_ipa_cmd(card, iob, prot_type);
	rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
						iob, reply_cb, reply_param);
	if (rc == -ETIME) {
		qeth_clear_ipacmd_list(card);
		qeth_schedule_recovery(card);
	}
	return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);

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

	QETH_DBF_TEXT(SETUP, 2, "strtlan");

	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
	if (!iob)
		return -ENOMEM;
	rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
	return rc;
}

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

	QETH_CARD_TEXT(card, 4, "defadpcb");

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

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

	QETH_CARD_TEXT(card, 3, "quyadpcb");

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

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

	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
				     QETH_PROT_IPV4);
	if (iob) {
		cmd = __ipa_cmd(iob);
		cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
		cmd->data.setadapterparms.hdr.command_code = command;
		cmd->data.setadapterparms.hdr.used_total = 1;
		cmd->data.setadapterparms.hdr.seq_no = 1;
	}

	return iob;
}

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "qipasscb");

	cmd = (struct qeth_ipa_cmd *) data;

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

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

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

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

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_switch_info *sw_info;
	struct qeth_query_switch_attributes *attrs;

	QETH_CARD_TEXT(card, 2, "qswiatcb");
	cmd = (struct qeth_ipa_cmd *) data;
	sw_info = (struct qeth_switch_info *)reply->param;
	if (cmd->data.setadapterparms.hdr.return_code == 0) {
		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);
	}
	qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);

	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,
				sizeof(struct qeth_ipacmd_setadpparms_hdr));
	if (!iob)
		return -ENOMEM;
	return qeth_send_ipa_cmd(card, iob,
				qeth_query_switch_attributes_cb, sw_info);
}
EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "qdiagass");
	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
	if (!iob)
		return -ENOMEM;
	cmd = __ipa_cmd(iob);
	cmd->data.diagass.subcmd_len = 16;
	cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
	return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
}

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

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

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

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

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

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

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) {
			card->stats.rx_dropped++;
			return 0;
		} else
			return 1;
	}
	return 0;
}

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

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

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

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

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

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

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

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

	if (!qdio_err)
		return;

	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 =
			(queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
		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");
			if (queue->card->options.performance_stats)
				queue->card->perf_stats.sc_dp_p++;
			queue->do_pack = 1;
		}
	}
}

/*
 * Switches from packing to non-packing mode. If there is a packing
 * buffer on the queue this buffer will be prepared to be flushed.
 * In that case 1 is returned to inform the caller. If no buffer
 * has to be flushed, zero is returned.
 */
static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
{
	if (queue->do_pack) {
		if (atomic_read(&queue->used_buffers)
		    <= QETH_LOW_WATERMARK_PACK) {
			/* switch PACKING -> non-PACKING */
			QETH_CARD_TEXT(queue->card, 6, "pack->np");
			if (queue->card->options.performance_stats)
				queue->card->perf_stats.sc_p_dp++;
			queue->do_pack = 0;
			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;
	int rc;
	int i;
	unsigned int qdio_flags;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

}
EXPORT_SYMBOL_GPL(qeth_configure_cq);


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

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

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

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

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

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

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

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

			++e;
		}

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

	netif_wake_queue(card->dev);

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

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

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

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


}
EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);

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

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

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

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

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

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

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

/* We cannot use outbound queue 3 for unicast packets on HiperSockets */
static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
{
	if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
		return 2;
	return queue_num;
}

/**
 * Note: Function assumes that we have 4 outbound queues.
 */
int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
			int ipv, int cast_type)
{
	__be16 *tci;
	u8 tos;

	if (cast_type && card->info.is_multicast_different)
		return card->info.is_multicast_different &
			(card->qdio.no_out_queues - 1);

	switch (card->qdio.do_prio_queueing) {
	case QETH_PRIO_Q_ING_TOS:
	case QETH_PRIO_Q_ING_PREC:
		switch (ipv) {
		case 4:
			tos = ipv4_get_dsfield(ip_hdr(skb));
			break;
		case 6:
			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 qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
		if (tos & IPTOS_MINCOST)
			return qeth_cut_iqd_prio(card, 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 qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
	case QETH_PRIO_Q_ING_VLAN:
		tci = &((struct ethhdr *)skb->data)->h_proto;
		if (be16_to_cpu(*tci) == ETH_P_8021Q)
			return qeth_cut_iqd_prio(card,
			~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
		break;
	default:
		break;
	}
	return card->qdio.default_out_queue;
}
EXPORT_SYMBOL_GPL(qeth_get_priority_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.
 */
int qeth_get_elements_for_frags(struct sk_buff *skb)
{
	int cnt, elements = 0;

	for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
		struct skb_frag_struct *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;
}
EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);

/**
 * qeth_get_elements_no() -	find number of SBALEs for skb data, inc. frags.
 * @card:			qeth card structure, to check max. elems.
 * @skb:			SKB address
 * @extra_elems:		extra elems needed, to check against max.
 * @data_offset:		range starts at skb->data + data_offset
 *
 * Returns the number of pages, and thus QDIO buffer elements, needed to cover
 * skb data, including linear part and fragments. Checks if the result plus
 * extra_elems fits under the limit for the card. Returns 0 if it does not.
 * Note: extra_elems is not included in the returned result.
 */
int qeth_get_elements_no(struct qeth_card *card,
		     struct sk_buff *skb, int extra_elems, int data_offset)
{
	addr_t end = (addr_t)skb->data + skb_headlen(skb);
	int elements = qeth_get_elements_for_frags(skb);
	addr_t start = (addr_t)skb->data + data_offset;

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

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

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

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

/**
 * qeth_push_hdr() - push a qeth_hdr onto an skb.
 * @skb: skb that the qeth_hdr should be pushed onto.
 * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
 *	 it contains a valid pointer to a qeth_hdr.
 * @len: length of the hdr that needs to be pushed on.
 *
 * 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.
 * Error to create the hdr is indicated by returning with < 0.
 */
int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
{
	if (skb_headroom(skb) >= len &&
	    qeth_get_elements_for_range((addr_t)skb->data - len,
					(addr_t)skb->data) == 1) {
		*hdr = skb_push(skb, len);
		return len;
	}
	/* fall back */
	*hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
	if (!*hdr)
		return -ENOMEM;
	return 0;
}
EXPORT_SYMBOL_GPL(qeth_push_hdr);

static void __qeth_fill_buffer(struct sk_buff *skb,
			       struct qeth_qdio_out_buffer *buf,
			       bool is_first_elem, unsigned int offset)
{
	struct qdio_buffer *buffer = buf->buffer;
	int element = buf->next_element_to_fill;
	int length = skb_headlen(skb) - offset;
	char *data = skb->data + offset;
	int length_here, cnt;

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

		buffer->element[element].addr = data;
		buffer->element[element].length = length_here;
		length -= length_here;
		if (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 += length_here;
		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) {
			length_here = PAGE_SIZE -
				((unsigned long) data % PAGE_SIZE);
			if (length < length_here)
				length_here = length;

			buffer->element[element].addr = data;
			buffer->element[element].length = length_here;
			buffer->element[element].eflags =
				SBAL_EFLAGS_MIDDLE_FRAG;
			length -= length_here;
			data += length_here;
			element++;
		}
	}

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

/**
 * qeth_fill_buffer() - map skb into an output buffer
 * @queue:	QDIO queue to submit the buffer on
 * @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 int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
			    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;
	bool is_first_elem = true;
	int flush_cnt = 0;

	refcount_inc(&skb->users);
	skb_queue_tail(&buf->skb_list, skb);

	/* build dedicated header element */
	if (hd_len) {
		int element = buf->next_element_to_fill;
		is_first_elem = false;

		buffer->element[element].addr = hdr;
		buffer->element[element].length = hd_len;
		buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
		/* remember to free cache-allocated qeth_hdr: */
		buf->is_header[element] = ((void *)hdr != skb->data);
		buf->next_element_to_fill++;
	}

	__qeth_fill_buffer(skb, buf, is_first_elem, offset);

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

int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
			     struct qeth_hdr *hdr, unsigned int offset,
			     unsigned int hd_len)
{
	int index = queue->next_buf_to_fill;
	struct qeth_qdio_out_buffer *buffer = queue->bufs[index];

	/*
	 * check if buffer is empty to make sure that we do not 'overtake'
	 * ourselves and try to fill a buffer that is already primed
	 */
	if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
		return -EBUSY;
	queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
	qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
	qeth_flush_buffers(queue, index, 1);
	return 0;
}
EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);

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

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

	return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_send_packet);

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

	QETH_CARD_TEXT(card, 4, "prmadpcb");

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

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

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

	QETH_CARD_TEXT(card, 4, "setprom");

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

	iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
			sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
	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);

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

	card = dev->ml_priv;

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

	if (!qeth_mtu_is_valid(card, new_mtu))
		return -EINVAL;
	dev->mtu = new_mtu;
	return 0;
}
EXPORT_SYMBOL_GPL(qeth_change_mtu);

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

	card = dev->ml_priv;

	QETH_CARD_TEXT(card, 5, "getstat");

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

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

	QETH_CARD_TEXT(card, 4, "chgmaccb");

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

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

	QETH_CARD_TEXT(card, 4, "chgmac");

	iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
				   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
				   sizeof(struct qeth_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_set_access_ctrl *access_ctrl_req;
	int fallback = *(int *)reply->param;

	QETH_CARD_TEXT(card, 4, "setaccb");

	cmd = (struct qeth_ipa_cmd *) data;
	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
	QETH_DBF_TEXT_(SETUP, 2, "setaccb");
	QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
	QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
		cmd->data.setadapterparms.hdr.return_code);
	if (cmd->data.setadapterparms.hdr.return_code !=
						SET_ACCESS_CTRL_RC_SUCCESS)
		QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
				card->gdev->dev.kobj.name,
				access_ctrl_req->subcmd_code,
				cmd->data.setadapterparms.hdr.return_code);
	switch (cmd->data.setadapterparms.hdr.return_code) {
	case SET_ACCESS_CTRL_RC_SUCCESS:
		if (card->options.isolation == ISOLATION_MODE_NONE) {
			dev_info(&card->gdev->dev,
			    "QDIO data connection isolation is deactivated\n");
		} else {
			dev_info(&card->gdev->dev,
			    "QDIO data connection isolation is activated\n");
		}
		break;
	case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
		QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
				"deactivated\n", dev_name(&card->gdev->dev));
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
		QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
				" activated\n", dev_name(&card->gdev->dev));
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
		dev_err(&card->gdev->dev, "Adapter does not "
			"support QDIO data connection isolation\n");
		break;
	case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
		dev_err(&card->gdev->dev,
			"Adapter is dedicated. "
			"QDIO data connection isolation not supported\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
		dev_err(&card->gdev->dev,
			"TSO does not permit QDIO data connection isolation\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
		dev_err(&card->gdev->dev, "The adjacent switch port does not "
			"support reflective relay mode\n");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
		dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
					"enabled at the adjacent switch port");
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
		dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
					"at the adjacent switch failed\n");
		break;
	default:
		/* this should never happen */
		if (fallback)
			card->options.isolation = card->options.prev_isolation;
		break;
	}
	qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
	return 0;
}

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

	QETH_CARD_TEXT(card, 4, "setacctl");

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

	iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
				   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
				   sizeof(struct qeth_set_access_ctrl));
	if (!iob)
		return -ENOMEM;
	cmd = __ipa_cmd(iob);
	access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
	access_ctrl_req->subcmd_code = isolation;

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

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

	QETH_CARD_TEXT(card, 4, "setactlo");

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 4, "sendsnmp");

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

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

	QETH_CARD_TEXT(card, 3, "snpcmdcb");

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

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

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

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

	QETH_CARD_TEXT(card, 3, "snmpcmd");

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

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

	iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
				   QETH_SNMP_SETADP_CMDLENGTH + req_len);
	if (!iob) {
		rc = -ENOMEM;
		goto out;
	}
	cmd = __ipa_cmd(iob);
	memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
	rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
				    qeth_snmp_command_cb, (void *)&qinfo);
	if (rc)
		QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
			   QETH_CARD_IFNAME(card), rc);
	else {
		if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
			rc = -EFAULT;
	}
out:
	kfree(ureq);
	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_qoat_priv *priv;
	char *resdata;
	int resdatalen;

	QETH_CARD_TEXT(card, 3, "qoatcb");

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

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

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

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

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)) {
		rc = -EOPNOTSUPP;
		goto out;
	}

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

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

	iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
				   sizeof(struct qeth_ipacmd_setadpparms_hdr) +
				   sizeof(struct qeth_query_oat));
	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) {
		if (is_compat_task())
			tmp = compat_ptr(oat_data.ptr);
		else
			tmp = (void __user *)(unsigned long)oat_data.ptr;

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

		oat_data.response_len = priv.response_len;

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

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

static int qeth_query_card_info_cb(struct qeth_card *card,
				   struct qeth_reply *reply, unsigned long data)
{
	struct qeth_ipa_cmd *cmd;
	struct qeth_query_card_info *card_info;
	struct carrier_info *carrier_info;

	QETH_CARD_TEXT(card, 2, "qcrdincb");
	carrier_info = (struct carrier_info *)reply->param;
	cmd = (struct qeth_ipa_cmd *)data;
	card_info = &cmd->data.setadapterparms.data.card_info;
	if (cmd->data.setadapterparms.hdr.return_code == 0) {
		carrier_info->card_type = card_info->card_type;
		carrier_info->port_mode = card_info->port_mode;
		carrier_info->port_speed = card_info->port_speed;
	}

	qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
	return 0;
}

static int qeth_query_card_info(struct qeth_card *card,
				struct carrier_info *carrier_info)
{
	struct qeth_cmd_buffer *iob;

	QETH_CARD_TEXT(card, 2, "qcrdinfo");
	if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
		return -EOPNOTSUPP;
	iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
		sizeof(struct qeth_ipacmd_setadpparms_hdr));
	if (!iob)
		return -ENOMEM;
	return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
					(void *)carrier_info);
}

/**
 * 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;
	struct ccw_dev_id id;
	int rc;

	QETH_DBF_TEXT(SETUP, 2, "vmreqmac");

	if (!card->dev)
		return -ENODEV;

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

	ccw_device_get_id(CARD_DDEV(card), &id);
	request->resp_buf_len = sizeof(*response);
	request->resp_version = DIAG26C_VERSION2;
	request->op_code = DIAG26C_GET_MAC;
	request->devno = id.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_DBF_TEXT(SETUP, 2, "badresp");
		QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
			     sizeof(request->resp_buf_len));
	} else if (!is_valid_ether_addr(response->mac)) {
		rc = -EINVAL;
		QETH_DBF_TEXT(SETUP, 2, "badmac");
		QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
	} else {
		ether_addr_copy(card->dev->dev_addr, response->mac);
	}

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

static int qeth_get_qdio_q_format(struct qeth_card *card)
{
	if (card->info.type == QETH_CARD_TYPE_IQD)
		return QDIO_IQDIO_QFMT;
	else
		return QDIO_QETH_QFMT;
}

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

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

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

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

	QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
	QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
	QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
	QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
	QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
	if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
	    ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
	    ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
		dev_info(&card->gdev->dev,
			"Completion Queueing supported\n");
	} else {
		card->options.cq = QETH_CQ_NOTAVAILABLE;
	}


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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "qdioest");

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

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

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

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

	qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);

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

	memset(&init_data, 0, sizeof(struct qdio_initialize));
	init_data.cdev                   = CARD_DDEV(card);
	init_data.q_format               = qeth_get_qdio_q_format(card);
	init_data.qib_param_field_format = 0;
	init_data.qib_param_field        = qib_param_field;
	init_data.no_input_qs            = card->qdio.no_in_queues;
	init_data.no_output_qs           = card->qdio.no_out_queues;
	init_data.input_handler 	 = card->discipline->input_handler;
	init_data.output_handler	 = card->discipline->output_handler;
	init_data.queue_start_poll_array = queue_start_poll;
	init_data.int_parm               = (unsigned long) card;
	init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
	init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
	init_data.output_sbal_state_array = card->qdio.out_bufstates;
	init_data.scan_threshold =
		(card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;

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

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

static void qeth_core_free_card(struct qeth_card *card)
{

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

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));
}
EXPORT_SYMBOL_GPL(qeth_trace_features);

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

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

int qeth_core_hardsetup_card(struct qeth_card *card)
{
	int retries = 3;
	int rc;

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

	rc = qeth_send_startlan(card);
	if (rc) {
		QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
		if (rc == IPA_RC_LAN_OFFLINE) {
			dev_warn(&card->gdev->dev,
				"The LAN is offline\n");
			card->lan_online = 0;
		} else {
			rc = -ENODEV;
			goto out;
		}
	} else
		card->lan_online = 1;

	card->options.ipa4.supported_funcs = 0;
	card->options.ipa6.supported_funcs = 0;
	card->options.adp.supported_funcs = 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_SETADAPTERPARMS)) {
		rc = qeth_query_setadapterparms(card);
		if (rc < 0) {
			QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
			goto out;
		}
	}
	if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
		rc = qeth_query_setdiagass(card);
		if (rc < 0) {
			QETH_DBF_TEXT_(SETUP, 2, "8err%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, "%s Initialization in hardsetup failed! rc=%d\n",
		dev_name(&card->gdev->dev), rc);
	return rc;
}
EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);

static void qeth_create_skb_frag(struct qdio_buffer_element *element,
				 struct sk_buff *skb, int offset, int data_len)
{
	struct page *page = virt_to_page(element->addr);
	unsigned int next_frag;

	/* first fill the linear space */
	if (!skb->len) {
		unsigned int linear = min(data_len, skb_tailroom(skb));

		skb_put_data(skb, element->addr + offset, linear);
		data_len -= linear;
		if (!data_len)
			return;
		offset += linear;
		/* fall through to add page frag for remaining data */
	}

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

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

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

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

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

	if (!skb_len)
		return NULL;

	if (((skb_len >= card->options.rx_sg_cb) &&
	     (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
	     (!atomic_read(&card->force_alloc_skb))) ||
	    (card->options.cq == QETH_CQ_ENABLED))
		use_rx_sg = 1;

	if (use_rx_sg && qethbuffer->rx_skb) {
		/* QETH_CQ_ENABLED only: */
		skb = qethbuffer->rx_skb;
		qethbuffer->rx_skb = NULL;
	} else {
		unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;

		skb = napi_alloc_skb(&card->napi, linear + headroom);
	}
	if (!skb)
		goto no_mem;
	if (headroom)
		skb_reserve(skb, headroom);

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

int qeth_poll(struct napi_struct *napi, int budget)
{
	struct qeth_card *card = container_of(napi, struct qeth_card, napi);
	int work_done = 0;
	struct qeth_qdio_buffer *buffer;
	int done;
	int new_budget = budget;

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

	while (1) {
		if (!card->rx.b_count) {
			card->rx.qdio_err = 0;
			card->rx.b_count = qdio_get_next_buffers(
				card->data.ccwdev, 0, &card->rx.b_index,
				&card->rx.qdio_err);
			if (card->rx.b_count <= 0) {
				card->rx.b_count = 0;
				break;
			}
			card->rx.b_element =
				&card->qdio.in_q->bufs[card->rx.b_index]
				.buffer->element[0];
			card->rx.e_offset = 0;
		}

		while (card->rx.b_count) {
			buffer = &card->qdio.in_q->bufs[card->rx.b_index];
			if (!(card->rx.qdio_err &&
			    qeth_check_qdio_errors(card, buffer->buffer,
			    card->rx.qdio_err, "qinerr")))
				work_done +=
					card->discipline->process_rx_buffer(
						card, new_budget, &done);
			else
				done = 1;

			if (done) {
				if (card->options.performance_stats)
					card->perf_stats.bufs_rec++;
				qeth_put_buffer_pool_entry(card,
					buffer->pool_entry);
				qeth_queue_input_buffer(card, card->rx.b_index);
				card->rx.b_count--;
				if (card->rx.b_count) {
					card->rx.b_index =
						(card->rx.b_index + 1) %
						QDIO_MAX_BUFFERS_PER_Q;
					card->rx.b_element =
						&card->qdio.in_q
						->bufs[card->rx.b_index]
						.buffer->element[0];
					card->rx.e_offset = 0;
				}
			}

			if (work_done >= budget)
				goto out;
			else
				new_budget = budget - work_done;
		}
	}

	napi_complete_done(napi, work_done);
	if (qdio_start_irq(card->data.ccwdev, 0))
		napi_schedule(&card->napi);
out:
	if (card->options.performance_stats)
		card->perf_stats.inbound_time += qeth_get_micros() -
			card->perf_stats.inbound_start_time;
	return work_done;
}
EXPORT_SYMBOL_GPL(qeth_poll);

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;
}

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

	QETH_CARD_TEXT(card, 4, "defadpcb");

	cmd = (struct qeth_ipa_cmd *) data;
	if (cmd->hdr.return_code == 0) {
		cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
		if (cmd->hdr.prot_version == QETH_PROT_IPV4)
			card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
		if (cmd->hdr.prot_version == QETH_PROT_IPV6)
			card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
	}
	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, __u16 len,
						 enum qeth_prot_versions prot)
{
	struct qeth_cmd_buffer *iob;
	struct qeth_ipa_cmd *cmd;

	QETH_CARD_TEXT(card, 4, "getasscm");
	iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);

	if (iob) {
		cmd = __ipa_cmd(iob);
		cmd->data.setassparms.hdr.assist_no = ipa_func;
		cmd->data.setassparms.hdr.length = 8 + len;
		cmd->data.setassparms.hdr.command_code = cmd_code;
		cmd->data.setassparms.hdr.return_code = 0;
		cmd->data.setassparms.hdr.seq_no = 0;
	}

	return iob;
}
EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);

int qeth_send_setassparms(struct qeth_card *card,
			  struct qeth_cmd_buffer *iob, __u16 len, long data,
			  int (*reply_cb)(struct qeth_card *,
					  struct qeth_reply *, unsigned long),
			  void *reply_param)
{
	int rc;
	struct qeth_ipa_cmd *cmd;

	QETH_CARD_TEXT(card, 4, "sendassp");

	cmd = __ipa_cmd(iob);
	if (len <= sizeof(__u32))
		cmd->data.setassparms.data.flags_32bit = (__u32) data;
	else   /* (len > sizeof(__u32)) */
		memcpy(&cmd->data.setassparms.data, (void *) data, len);

	rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
	return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_setassparms);

int qeth_send_simple_setassparms(struct qeth_card *card,
				 enum qeth_ipa_funcs ipa_func,
				 __u16 cmd_code, long data)
{
	int rc;
	int length = 0;
	struct qeth_cmd_buffer *iob;

	QETH_CARD_TEXT(card, 4, "simassp4");
	if (data)
		length = sizeof(__u32);
	iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
				       length, QETH_PROT_IPV4);
	if (!iob)
		return -ENOMEM;
	rc = qeth_send_setassparms(card, iob, length, data,
				   qeth_setassparms_cb, NULL);
	return rc;
}
EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms);

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);
	vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
	va_end(args);
	debug_text_event(id, level, dbf_txt_buf);
}
EXPORT_SYMBOL_GPL(qeth_dbf_longtext);

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

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

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

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

	return 0;
}

int qeth_core_load_discipline(struct qeth_card *card,
		enum qeth_discipline_id discipline)
{
	int rc = 0;

	mutex_lock(&qeth_mod_mutex);
	switch (discipline) {
	case QETH_DISCIPLINE_LAYER3:
		card->discipline = try_then_request_module(
			symbol_get(qeth_l3_discipline), "qeth_l3");
		break;
	case QETH_DISCIPLINE_LAYER2:
		card->discipline = try_then_request_module(
			symbol_get(qeth_l2_discipline), "qeth_l2");
		break;
	default:
		break;
	}

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

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

const struct device_type qeth_generic_devtype = {
	.name = "qeth_generic",
	.groups = qeth_generic_attr_groups,
};
EXPORT_SYMBOL_GPL(qeth_generic_devtype);

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

#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(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
	if (!new_entry)
		goto err_dbg;
	strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
	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 int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
	struct qeth_card *card;
	struct device *dev;
	int rc;
	enum qeth_discipline_id enforced_disc;
	unsigned long flags;
	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();
	if (!card) {
		QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
		rc = -ENOMEM;
		goto err_dev;
	}

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

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

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

	qeth_determine_capabilities(card);
	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;
		rc = qeth_core_load_discipline(card, enforced_disc);
		if (rc)
			goto err_card;

		gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
					? card->discipline->devtype
					: &qeth_osn_devtype;
		rc = card->discipline->setup(card->gdev);
		if (rc)
			goto err_disc;
		break;
	}

	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
	list_add_tail(&card->list, &qeth_core_card_list.list);
	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
	return 0;

err_disc:
	qeth_core_free_discipline(card);
err_card:
	qeth_core_free_card(card);
err_dev:
	put_device(dev);
	return rc;
}

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

	QETH_DBF_TEXT(SETUP, 2, "removedv");

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

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

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

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

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

static void qeth_core_shutdown(struct ccwgroup_device *gdev)
{
	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
	qeth_set_allowed_threads(card, 0, 1);
	if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
		qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
	qeth_qdio_clear_card(card, 0);
	qeth_clear_qdio_buffers(card);
	qdio_free(CARD_DDEV(card));
}

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

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

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

static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name = "qeth",
	},
	.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,
	.prepare = NULL,
	.complete = NULL,
	.freeze = qeth_core_freeze,
	.thaw = qeth_core_thaw,
	.restore = qeth_core_restore,
};

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,
				  &qeth_core_ccwgroup_driver, 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,
};

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;

	if (!card)
		return -ENODEV;

	if (!qeth_card_hw_is_reachable(card))
		return -ENODEV;

	if (card->info.type == QETH_CARD_TYPE_OSN)
		return -EPERM;

	switch (cmd) {
	case SIOC_QETH_ADP_SET_SNMP_CONTROL:
		rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
		break;
	case SIOC_QETH_GET_CARD_TYPE:
		if ((card->info.type == QETH_CARD_TYPE_OSD ||
		     card->info.type == QETH_CARD_TYPE_OSM ||
		     card->info.type == QETH_CARD_TYPE_OSX) &&
		    !card->info.guestlan)
			return 1;
		else
			return 0;
	case SIOCGMIIPHY:
		mii_data = if_mii(rq);
		mii_data->phy_id = 0;
		break;
	case SIOCGMIIREG:
		mii_data = if_mii(rq);
		if (mii_data->phy_id != 0)
			rc = -EINVAL;
		else
			mii_data->val_out = qeth_mdio_read(dev,
				mii_data->phy_id, mii_data->reg_num);
		break;
	case SIOC_QETH_QUERY_OAT:
		rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
		break;
	default:
		if (card->discipline->do_ioctl)
			rc = card->discipline->do_ioctl(dev, rq, cmd);
		else
			rc = -EOPNOTSUPP;
	}
	if (rc)
		QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
	return rc;
}
EXPORT_SYMBOL_GPL(qeth_do_ioctl);

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

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

void qeth_core_get_ethtool_stats(struct net_device *dev,
		struct ethtool_stats *stats, u64 *data)
{
	struct qeth_card *card = dev->ml_priv;
	data[0] = card->stats.rx_packets -
				card->perf_stats.initial_rx_packets;
	data[1] = card->perf_stats.bufs_rec;
	data[2] = card->stats.tx_packets -
				card->perf_stats.initial_tx_packets;
	data[3] = card->perf_stats.bufs_sent;
	data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
			- card->perf_stats.skbs_sent_pack;
	data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
	data[6] = card->perf_stats.skbs_sent_pack;
	data[7] = card->perf_stats.bufs_sent_pack;
	data[8] = card->perf_stats.sg_skbs_sent;
	data[9] = card->perf_stats.sg_frags_sent;
	data[10] = card->perf_stats.sg_skbs_rx;
	data[11] = card->perf_stats.sg_frags_rx;
	data[12] = card->perf_stats.sg_alloc_page_rx;
	data[13] = (card->perf_stats.large_send_bytes >> 10);
	data[14] = card->perf_stats.large_send_cnt;
	data[15] = card->perf_stats.sc_dp_p;
	data[16] = card->perf_stats.sc_p_dp;
	data[17] = QETH_LOW_WATERMARK_PACK;
	data[18] = QETH_HIGH_WATERMARK_PACK;
	data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
	data[20] = (card->qdio.no_out_queues > 1) ?
			atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
	data[21] = (card->qdio.no_out_queues > 2) ?
			atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
	data[22] = (card->qdio.no_out_queues > 3) ?
			atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
	data[23] = card->perf_stats.inbound_time;
	data[24] = card->perf_stats.inbound_cnt;
	data[25] = card->perf_stats.inbound_do_qdio_time;
	data[26] = card->perf_stats.inbound_do_qdio_cnt;
	data[27] = card->perf_stats.outbound_handler_time;
	data[28] = card->perf_stats.outbound_handler_cnt;
	data[29] = card->perf_stats.outbound_time;
	data[30] = card->perf_stats.outbound_cnt;
	data[31] = card->perf_stats.outbound_do_qdio_time;
	data[32] = card->perf_stats.outbound_do_qdio_cnt;
	data[33] = card->perf_stats.tx_csum;
	data[34] = card->perf_stats.tx_lin;
	data[35] = card->perf_stats.tx_linfail;
	data[36] = card->perf_stats.cq_cnt;
	data[37] = card->perf_stats.cq_time;
}
EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);

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

void qeth_core_get_drvinfo(struct net_device *dev,
		struct ethtool_drvinfo *info)
{
	struct qeth_card *card = dev->ml_priv;

	strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
		sizeof(info->driver));
	strlcpy(info->version, "1.0", sizeof(info->version));
	strlcpy(info->fw_version, card->info.mcl_level,
		sizeof(info->fw_version));
	snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
		 CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
}
EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);

/* Helper function to fill 'advertising' and 'supported' which are the same. */
/* Autoneg and full-duplex are supported and advertised unconditionally.     */
/* Always advertise and support all speeds up to specified, and only one     */
/* specified port type.							     */
static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
				int maxspeed, int porttype)
{
	ethtool_link_ksettings_zero_link_mode(cmd, supported);
	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
	ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);

	ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
	ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);

	switch (porttype) {
	case PORT_TP:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		break;
	case PORT_FIBRE:
		ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
		WARN_ON_ONCE(1);
	}

	/* fallthrough from high to low, to select all legal speeds: */
	switch (maxspeed) {
	case SPEED_10000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10000baseT_Full);
	case SPEED_1000:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     1000baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     1000baseT_Half);
	case SPEED_100:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     100baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     100baseT_Half);
	case SPEED_10:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		/* end fallthrough */
		break;
	default:
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Full);
		ethtool_link_ksettings_add_link_mode(cmd, supported,
						     10baseT_Half);
		ethtool_link_ksettings_add_link_mode(cmd, advertising,
						     10baseT_Half);
		WARN_ON_ONCE(1);
	}
}

int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
		struct ethtool_link_ksettings *cmd)
{
	struct qeth_card *card = netdev->ml_priv;
	enum qeth_link_types link_type;
	struct carrier_info carrier_info;
	int rc;

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

	cmd->base.duplex = DUPLEX_FULL;
	cmd->base.autoneg = AUTONEG_ENABLE;
	cmd->base.phy_address = 0;
	cmd->base.mdio_support = 0;
	cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
	cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;

	switch (link_type) {
	case QETH_LINK_TYPE_FAST_ETH:
	case QETH_LINK_TYPE_LANE_ETH100:
		cmd->base.speed = SPEED_100;
		cmd->base.port = PORT_TP;
		break;
	case QETH_LINK_TYPE_GBIT_ETH:
	case QETH_LINK_TYPE_LANE_ETH1000:
		cmd->base.speed = SPEED_1000;
		cmd->base.port = PORT_FIBRE;
		break;
	case QETH_LINK_TYPE_10GBIT_ETH:
		cmd->base.speed = SPEED_10000;
		cmd->base.port = PORT_FIBRE;
		break;
	default:
		cmd->base.speed = SPEED_10;
		cmd->base.port = PORT_TP;
	}
	qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);

	/* Check if we can obtain more accurate information.	 */
	/* If QUERY_CARD_INFO command is not supported or fails, */
	/* just return the heuristics that was filled above.	 */
	if (!qeth_card_hw_is_reachable(card))
		return -ENODEV;
	rc = qeth_query_card_info(card, &carrier_info);
	if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
		return 0;
	if (rc) /* report error from the hardware operation */
		return rc;
	/* on success, fill in the information got from the hardware */

	netdev_dbg(netdev,
	"card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
			carrier_info.card_type,
			carrier_info.port_mode,
			carrier_info.port_speed);

	/* Update attributes for which we've obtained more authoritative */
	/* information, leave the rest the way they where filled above.  */
	switch (carrier_info.card_type) {
	case CARD_INFO_TYPE_1G_COPPER_A:
	case CARD_INFO_TYPE_1G_COPPER_B:
		cmd->base.port = PORT_TP;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_1G_FIBRE_A:
	case CARD_INFO_TYPE_1G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
		break;
	case CARD_INFO_TYPE_10G_FIBRE_A:
	case CARD_INFO_TYPE_10G_FIBRE_B:
		cmd->base.port = PORT_FIBRE;
		qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
		break;
	}

	switch (carrier_info.port_mode) {
	case CARD_INFO_PORTM_FULLDUPLEX:
		cmd->base.duplex = DUPLEX_FULL;
		break;
	case CARD_INFO_PORTM_HALFDUPLEX:
		cmd->base.duplex = DUPLEX_HALF;
		break;
	}

	switch (carrier_info.port_speed) {
	case CARD_INFO_PORTS_10M:
		cmd->base.speed = SPEED_10;
		break;
	case CARD_INFO_PORTS_100M:
		cmd->base.speed = SPEED_100;
		break;
	case CARD_INFO_PORTS_1G:
		cmd->base.speed = SPEED_1000;
		break;
	case CARD_INFO_PORTS_10G:
		cmd->base.speed = SPEED_10000;
		break;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);

/* Callback to handle checksum offload command reply from OSA card.
 * Verify that required features have been enabled on the card.
 * Return error in hdr->return_code as this value is checked by caller.
 *
 * Always returns zero to indicate no further messages from the OSA card.
 */
static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
					struct qeth_reply *reply,
					unsigned long data)
{
	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
	struct qeth_checksum_cmd *chksum_cb =
				(struct qeth_checksum_cmd *)reply->param;

	QETH_CARD_TEXT(card, 4, "chkdoccb");
	if (qeth_setassparms_inspect_rc(cmd))
		return 0;

	memset(chksum_cb, 0, sizeof(*chksum_cb));
	if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
		chksum_cb->supported =
				cmd->data.setassparms.data.chksum.supported;
		QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
	}
	if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
		chksum_cb->supported =
				cmd->data.setassparms.data.chksum.supported;
		chksum_cb->enabled =
				cmd->data.setassparms.data.chksum.enabled;
		QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
		QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
	}
	return 0;
}

/* Send command to OSA card and check results. */
static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
				     enum qeth_ipa_funcs ipa_func,
				     __u16 cmd_code, long data,
				     struct qeth_checksum_cmd *chksum_cb)
{
	struct qeth_cmd_buffer *iob;
	int rc = -ENOMEM;

	QETH_CARD_TEXT(card, 4, "chkdocmd");
	iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
				       sizeof(__u32), QETH_PROT_IPV4);
	if (iob)
		rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
					   qeth_ipa_checksum_run_cmd_cb,
					   chksum_cb);
	return rc;
}

static int qeth_send_checksum_on(struct qeth_card *card, int cstype)
{
	const __u32 required_features = QETH_IPA_CHECKSUM_IP_HDR |
					QETH_IPA_CHECKSUM_UDP |
					QETH_IPA_CHECKSUM_TCP;
	struct qeth_checksum_cmd chksum_cb;
	int rc;

	rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
				       &chksum_cb);
	if (!rc) {
		if ((required_features & chksum_cb.supported) !=
		    required_features)
			rc = -EIO;
		else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
			 cstype == IPA_INBOUND_CHECKSUM)
			dev_warn(&card->gdev->dev,
				 "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
				 QETH_CARD_IFNAME(card));
	}
	if (rc) {
		qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
		dev_warn(&card->gdev->dev,
			 "Starting HW checksumming for %s failed, using SW checksumming\n",
			 QETH_CARD_IFNAME(card));
		return rc;
	}
	rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
				       chksum_cb.supported, &chksum_cb);
	if (!rc) {
		if ((required_features & chksum_cb.enabled) !=
		    required_features)
			rc = -EIO;
	}
	if (rc) {
		qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
		dev_warn(&card->gdev->dev,
			 "Enabling HW checksumming for %s failed, using SW checksumming\n",
			 QETH_CARD_IFNAME(card));
		return rc;
	}

	dev_info(&card->gdev->dev, "HW Checksumming (%sbound) enabled\n",
		 cstype == IPA_INBOUND_CHECKSUM ? "in" : "out");
	return 0;
}

static int qeth_set_ipa_csum(struct qeth_card *card, int on, int cstype)
{
	int rc = (on) ? qeth_send_checksum_on(card, cstype)
		      : qeth_send_simple_setassparms(card, cstype,
						     IPA_CMD_ASS_STOP, 0);
	return rc ? -EIO : 0;
}

static int qeth_set_ipa_tso(struct qeth_card *card, int on)
{
	int rc;

	QETH_CARD_TEXT(card, 3, "sttso");

	if (on) {
		rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
						  IPA_CMD_ASS_START, 0);
		if (rc) {
			dev_warn(&card->gdev->dev,
				 "Starting outbound TCP segmentation offload for %s failed\n",
				 QETH_CARD_IFNAME(card));
			return -EIO;
		}
		dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
	} else {
		rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
						  IPA_CMD_ASS_STOP, 0);
	}
	return rc;
}

#define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO)

/**
 * qeth_recover_features() - Restore device features after recovery
 * @dev:	the recovering net_device
 *
 * Caller must hold rtnl lock.
 */
void qeth_recover_features(struct net_device *dev)
{
	netdev_features_t features = dev->features;
	struct qeth_card *card = dev->ml_priv;

	/* force-off any feature that needs an IPA sequence.
	 * netdev_update_features() will restart them.
	 */
	dev->features &= ~QETH_HW_FEATURES;
	netdev_update_features(dev);

	if (features == dev->features)
		return;
	dev_warn(&card->gdev->dev,
		 "Device recovery failed to restore all offload features\n");
}
EXPORT_SYMBOL_GPL(qeth_recover_features);

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_DBF_TEXT(SETUP, 2, "setfeat");
	QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));

	if ((changed & NETIF_F_IP_CSUM)) {
		rc = qeth_set_ipa_csum(card,
				       features & NETIF_F_IP_CSUM ? 1 : 0,
				       IPA_OUTBOUND_CHECKSUM);
		if (rc)
			changed ^= NETIF_F_IP_CSUM;
	}
	if ((changed & NETIF_F_RXCSUM)) {
		rc = qeth_set_ipa_csum(card,
					features & NETIF_F_RXCSUM ? 1 : 0,
					IPA_INBOUND_CHECKSUM);
		if (rc)
			changed ^= NETIF_F_RXCSUM;
	}
	if ((changed & NETIF_F_TSO)) {
		rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
		if (rc)
			changed ^= NETIF_F_TSO;
	}

	/* 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_DBF_TEXT(SETUP, 2, "fixfeat");
	if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
		features &= ~NETIF_F_IP_CSUM;
	if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
		features &= ~NETIF_F_RXCSUM;
	if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
		features &= ~NETIF_F_TSO;
	/* if the card isn't up, remove features that require hw changes */
	if (card->state == CARD_STATE_DOWN ||
	    card->state == CARD_STATE_RECOVER)
		features &= ~QETH_HW_FEATURES;
	QETH_DBF_HEX(SETUP, 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)
{
	/* 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);

static int __init qeth_core_init(void)
{
	int rc;

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

	qeth_wq = create_singlethread_workqueue("qeth_wq");

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

	return 0;

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

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

module_init(qeth_core_init);
module_exit(qeth_core_exit);
MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
MODULE_DESCRIPTION("qeth core functions");
MODULE_LICENSE("GPL");