drivers/s390/net/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/compat.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>

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

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

#include "qeth_core.h"

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

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 void qeth_issue_next_read_cb(struct qeth_card *card,
				    struct qeth_cmd_buffer *iob,
				    unsigned int data_length);
static void qeth_free_buffer_pool(struct qeth_card *);
static int qeth_qdio_establish(struct qeth_card *);
static void qeth_free_qdio_queues(struct qeth_card *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_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
				 int budget);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);

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");
	ccwgroup_set_offline(card->gdev);
}

static const char *qeth_get_cardname(struct qeth_card *card)
{
	if (IS_VM_NIC(card)) {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			return " Virtual NIC QDIO";
		case QETH_CARD_TYPE_IQD:
			return " Virtual NIC Hiper";
		case QETH_CARD_TYPE_OSM:
			return " Virtual NIC QDIO - OSM";
		case QETH_CARD_TYPE_OSX:
			return " Virtual NIC QDIO - OSX";
		default:
			return " unknown";
		}
	} else {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			return " OSD Express";
		case QETH_CARD_TYPE_IQD:
			return " HiperSockets";
		case QETH_CARD_TYPE_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 (IS_VM_NIC(card)) {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			return "Virt.NIC QDIO";
		case QETH_CARD_TYPE_IQD:
			return "Virt.NIC Hiper";
		case QETH_CARD_TYPE_OSM:
			return "Virt.NIC OSM";
		case QETH_CARD_TYPE_OSX:
			return "Virt.NIC OSX";
		default:
			return "unknown";
		}
	} else {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			switch (card->info.link_type) {
			case QETH_LINK_TYPE_FAST_ETH:
				return "OSD_100";
			case QETH_LINK_TYPE_HSTR:
				return "HSTR";
			case QETH_LINK_TYPE_GBIT_ETH:
				return "OSD_1000";
			case QETH_LINK_TYPE_10GBIT_ETH:
				return "OSD_10GIG";
			case QETH_LINK_TYPE_25GBIT_ETH:
				return "OSD_25GIG";
			case QETH_LINK_TYPE_LANE_ETH100:
				return "OSD_FE_LANE";
			case QETH_LINK_TYPE_LANE_TR:
				return "OSD_TR_LANE";
			case QETH_LINK_TYPE_LANE_ETH1000:
				return "OSD_GbE_LANE";
			case QETH_LINK_TYPE_LANE:
				return "OSD_ATM_LANE";
			default:
				return "OSD_Express";
			}
		case QETH_CARD_TYPE_IQD:
			return "HiperSockets";
		case QETH_CARD_TYPE_OSN:
			return "OSN";
		case QETH_CARD_TYPE_OSM:
			return "OSM_1000";
		case QETH_CARD_TYPE_OSX:
			return "OSX_10GIG";
		default:
			return "unknown";
		}
	}
	return "n/a";
}

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

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

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

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

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)
		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_CARD_TEXT(card, 2, "cqinit");
		qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
				   QDIO_MAX_BUFFERS_PER_Q);
		card->qdio.c_q->next_buf_to_init = 127;
		rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
			     card->qdio.no_in_queues - 1, 0,
			     127);
		if (rc) {
			QETH_CARD_TEXT_(card, 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_CARD_TEXT(card, 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 =
			kcalloc(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_CARD_TEXT(card, 2, "nocq");
		card->qdio.c_q = NULL;
		card->qdio.no_in_queues = 1;
	}
	QETH_CARD_TEXT_(card, 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_tx_complete_buf(c, forced_cleanup, 0);

				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;
			}

		}
	}
}


static void qeth_qdio_handle_aob(struct qeth_card *card,
				 unsigned long phys_aob_addr)
{
	enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
	struct qaob *aob;
	struct qeth_qdio_out_buffer *buffer;
	enum iucv_tx_notify notification;
	unsigned int i;

	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);

	/* Free dangling allocations. The attached skbs are handled by
	 * qeth_cleanup_handled_pending().
	 */
	for (i = 0;
	     i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
	     i++) {
		if (aob->sba[i] && buffer->is_header[i])
			kmem_cache_free(qeth_core_header_cache,
					(void *) aob->sba[i]);
	}

	if (aob->aorc) {
		QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
		new_state = QETH_QDIO_BUF_QAOB_ERROR;
	}

	switch (atomic_xchg(&buffer->state, new_state)) {
	case QETH_QDIO_BUF_PRIMED:
		/* Faster than TX completion code. */
		notification = qeth_compute_cq_notification(aob->aorc, 0);
		qeth_notify_skbs(buffer->q, buffer, notification);
		atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
		break;
	case QETH_QDIO_BUF_PENDING:
		/* TX completion code is active and will handle the async
		 * completion for us.
		 */
		break;
	case QETH_QDIO_BUF_NEED_QAOB:
		/* TX completion code is already finished. */
		notification = qeth_compute_cq_notification(aob->aorc, 1);
		qeth_notify_skbs(buffer->q, buffer, notification);
		atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
		break;
	default:
		WARN_ON_ONCE(1);
	}

	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 void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
			   void *data)
{
	ccw->cmd_code = cmd_code;
	ccw->flags = flags | CCW_FLAG_SLI;
	ccw->count = len;
	ccw->cda = (__u32) __pa(data);
}

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

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

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

	QETH_CARD_TEXT(card, 6, "noirqpnd");
	rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
	if (!rc) {
		channel->active_cmd = iob;
	} else {
		QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
				 rc, CARD_DEVID(card));
		atomic_set(&channel->irq_pending, 0);
		qeth_put_cmd(iob);
		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 void qeth_enqueue_cmd(struct qeth_card *card,
			     struct qeth_cmd_buffer *iob)
{
	spin_lock_irq(&card->lock);
	list_add_tail(&iob->list, &card->cmd_waiter_list);
	spin_unlock_irq(&card->lock);
}

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

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

static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
		struct qeth_card *card)
{
	const char *ipa_name;
	int com = cmd->hdr.command;
	ipa_name = qeth_get_ipa_cmd_name(com);

	if (rc)
		QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
				 ipa_name, com, CARD_DEVID(card), rc,
				 qeth_get_ipa_msg(rc));
	else
		QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
				 ipa_name, com, CARD_DEVID(card));
}

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

	if (IS_IPA_REPLY(cmd)) {
		if (cmd->hdr.command != IPA_CMD_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;
	}

	/* handle unsolicited event: */
	switch (cmd->hdr.command) {
	case IPA_CMD_STOPLAN:
		if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
			dev_err(&card->gdev->dev,
				"Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
				QETH_CARD_IFNAME(card));
			schedule_work(&card->close_dev_work);
		} 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);
			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);
		if (card->info.hwtrap)
			card->info.hwtrap = 2;
		qeth_schedule_recovery(card);
		return NULL;
	case IPA_CMD_SETBRIDGEPORT_IQD:
	case IPA_CMD_SETBRIDGEPORT_OSA:
	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
		if (card->discipline->control_event_handler(card, cmd))
			return cmd;
		return NULL;
	case IPA_CMD_MODCCID:
		return cmd;
	case IPA_CMD_REGISTER_LOCAL_ADDR:
		QETH_CARD_TEXT(card, 3, "irla");
		return NULL;
	case IPA_CMD_UNREGISTER_LOCAL_ADDR:
		QETH_CARD_TEXT(card, 3, "urla");
		return NULL;
	default:
		QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
		return cmd;
	}
}

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

	QETH_CARD_TEXT(card, 4, "clipalst");

	spin_lock_irqsave(&card->lock, flags);
	list_for_each_entry(iob, &card->cmd_waiter_list, list)
		qeth_notify_cmd(iob, -EIO);
	spin_unlock_irqrestore(&card->lock, flags);
}
EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);

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

void qeth_put_cmd(struct qeth_cmd_buffer *iob)
{
	if (refcount_dec_and_test(&iob->ref_count)) {
		kfree(iob->data);
		kfree(iob);
	}
}
EXPORT_SYMBOL_GPL(qeth_put_cmd);

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

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

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

	if (length > QETH_BUFSIZE)
		return NULL;

	iob = kzalloc(sizeof(*iob), GFP_KERNEL);
	if (!iob)
		return NULL;

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

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

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

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

	if (IS_IPA(iob->data)) {
		cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
		cmd = qeth_check_ipa_data(card, cmd);
		if (!cmd)
			goto out;
		if (IS_OSN(card) && card->osn_info.assist_cb &&
		    cmd->hdr.command != IPA_CMD_STARTLAN) {
			card->osn_info.assist_cb(card->dev, cmd);
			goto out;
		}
	} else {
		/* non-IPA commands should only flow during initialization */
		if (card->state != CARD_STATE_DOWN)
			goto out;
	}

	/* match against pending cmd requests */
	spin_lock_irqsave(&card->lock, flags);
	list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
		if (!IS_IPA(tmp->data) ||
		    __ipa_cmd(tmp)->hdr.seqno == cmd->hdr.seqno) {
			request = tmp;
			/* take the object outside the lock */
			qeth_get_cmd(request);
			break;
		}
	}
	spin_unlock_irqrestore(&card->lock, flags);

	if (!request)
		goto out;

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

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

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

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

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

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

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

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

	switch (PTR_ERR(irb)) {
	case -EIO:
		QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
				 CCW_DEVID(cdev));
		QETH_CARD_TEXT(card, 2, "ckirberr");
		QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
		return -EIO;
	case -ETIMEDOUT:
		dev_warn(&cdev->dev, "A hardware operation timed out"
			" on the device\n");
		QETH_CARD_TEXT(card, 2, "ckirberr");
		QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
		return -ETIMEDOUT;
	default:
		QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
				 PTR_ERR(irb), CCW_DEVID(cdev));
		QETH_CARD_TEXT(card, 2, "ckirberr");
		QETH_CARD_TEXT(card, 2, "  rc???");
		return PTR_ERR(irb);
	}
}

static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
		struct irb *irb)
{
	int rc;
	int cstat, dstat;
	struct qeth_cmd_buffer *iob = NULL;
	struct ccwgroup_device *gdev;
	struct qeth_channel *channel;
	struct qeth_card *card;

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

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

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

	channel->active_cmd = NULL;

	rc = qeth_check_irb_error(card, cdev, irb);
	if (rc) {
		/* IO was terminated, free its resources. */
		if (iob)
			qeth_cancel_cmd(iob, rc);
		atomic_set(&channel->irq_pending, 0);
		wake_up(&card->wait_q);
		return;
	}

	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;

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

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

	if ((dstat & DEV_STAT_UNIT_EXCEP) ||
	    (dstat & DEV_STAT_UNIT_CHECK) ||
	    (cstat)) {
		if (irb->esw.esw0.erw.cons) {
			dev_warn(&channel->ccwdev->dev,
				"The qeth device driver failed to recover "
				"an error on the device\n");
			QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
					 CCW_DEVID(channel->ccwdev), cstat,
					 dstat);
			print_hex_dump(KERN_WARNING, "qeth: irb ",
				DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
			print_hex_dump(KERN_WARNING, "qeth: sense data ",
				DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
		}

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

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

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;

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

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

	if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
		qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);

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

	QETH_TXQ_STAT_INC(queue, bufs);
	QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
	while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
		unsigned int bytes = qdisc_pkt_len(skb);
		bool is_tso = skb_is_gso(skb);
		unsigned int packets;

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

		napi_consume_skb(skb, budget);
	}
}

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

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

	qeth_tx_complete_buf(buf, error, budget);

	for (i = 0; i < queue->max_elements; ++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;
	}

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

static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool 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], true, 0);
		if (free) {
			kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
			q->bufs[j] = NULL;
		}
	}
}

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

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

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)
{
	struct ccw_device *cdev = channel->ccwdev;

	QETH_DBF_TEXT(SETUP, 2, "freech");

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

static void qeth_setup_channel(struct qeth_channel *channel)
{
	struct ccw_device *cdev = channel->ccwdev;

	QETH_DBF_TEXT(SETUP, 2, "setupch");

	channel->state = CH_STATE_DOWN;
	atomic_set(&channel->irq_pending, 0);

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

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

	rtnl_lock();
	rc = netif_set_real_num_tx_queues(card->dev, count);
	rtnl_unlock();

	if (rc)
		return rc;

	if (card->qdio.no_out_queues == count)
		return 0;

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

	if (count == 1)
		dev_info(&card->gdev->dev, "Priority Queueing not supported\n");

	card->qdio.no_out_queues = count;
	return 0;
}

static int qeth_update_from_chp_desc(struct qeth_card *card)
{
	struct ccw_device *ccwdev;
	struct channel_path_desc_fmt0 *chp_dsc;
	int rc = 0;

	QETH_CARD_TEXT(card, 2, "chp_desc");

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

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

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

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

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

	/* inbound */
	card->qdio.no_in_queues = 1;
	card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
	if (IS_IQD(card))
		card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
	else
		card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
	card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
	INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
	INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
}

static void qeth_set_initial_options(struct qeth_card *card)
{
	card->options.route4.type = NO_ROUTER;
	card->options.route6.type = NO_ROUTER;
	card->options.rx_sg_cb = QETH_RX_SG_CB;
	card->options.isolation = ISOLATION_MODE_NONE;
	card->options.cq = QETH_CQ_DISABLED;
	card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
}

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

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

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

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

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

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

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

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

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

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

	qeth_setup_channel(&card->read);
	qeth_setup_channel(&card->write);
	qeth_setup_channel(&card->data);
	card->qeth_service_level.seq_print = qeth_core_sl_print;
	register_service_level(&card->qeth_service_level);
	return card;

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

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

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

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

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

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

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

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

	rc = ccw_device_set_offline(cdev);

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

	return rc;
}
EXPORT_SYMBOL_GPL(qeth_stop_channel);

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

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

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

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

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

	QETH_CARD_TEXT(card, 3, "clhacrd");

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

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

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

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

	QETH_CARD_TEXT(card, 2, "vmlayer");

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

	request = kzalloc(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_CARD_TEXT_(card, 2, "err%x", rc);
	return disc;
}

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

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

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

	return disc;
}

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

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

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

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

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

	memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
	       &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
	card->seqno.pdu_hdr++;
	memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
	       &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);

	iob->callback = qeth_release_buffer_cb;
}

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "sendctl");

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

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

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

	qeth_enqueue_cmd(card, iob);

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

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

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

	qeth_dequeue_cmd(card, iob);

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

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

out:
	qeth_put_cmd(iob);
	return rc;
}

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

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

	QETH_CARD_TEXT(card, 2, "cfgunit");

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

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

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

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

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

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

	/* scan for RCD command in extended SenseID data */
	ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
	if (!ciw || ciw->cmd == 0)
		return -EOPNOTSUPP;
	if (ciw->count < sizeof(struct qeth_node_desc))
		return -EINVAL;

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "idxrdcb");

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

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

	memcpy(&card->token.issuer_rm_r,
	       QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
	       QETH_MPC_TOKEN_LENGTH);
	memcpy(&card->info.mcl_level[0],
	       QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);

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

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

	QETH_CARD_TEXT(card, 2, "idxwrcb");

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

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

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

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

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

	memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
	memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
	       &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
	memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
	       &card->info.func_level, 2);
	memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
	memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
}

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

	QETH_CARD_TEXT(card, 2, "idxread");

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

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

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

	channel->state = CH_STATE_UP;
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "idxwrite");

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

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

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

	channel->state = CH_STATE_UP;
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "cmenblcb");

	iob = (struct qeth_cmd_buffer *) data;
	memcpy(&card->token.cm_filter_r,
	       QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
	       QETH_MPC_TOKEN_LENGTH);
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "cmenable");

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

	memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
	       &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
	memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
	       &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);

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

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

	QETH_CARD_TEXT(card, 2, "cmsetpcb");

	iob = (struct qeth_cmd_buffer *) data;
	memcpy(&card->token.cm_connection_r,
	       QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
	       QETH_MPC_TOKEN_LENGTH);
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "cmsetup");

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

	memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
	       &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
	memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
	       &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
	memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
	       &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
	return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
}

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

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

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

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

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

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

static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
		unsigned long data)
{
	__u16 mtu, framesize;
	__u16 len;
	__u8 link_type;
	struct qeth_cmd_buffer *iob;

	QETH_CARD_TEXT(card, 2, "ulpenacb");

	iob = (struct qeth_cmd_buffer *) data;
	memcpy(&card->token.ulp_filter_r,
	       QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
	       QETH_MPC_TOKEN_LENGTH);
	if (IS_IQD(card)) {
		memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
		mtu = qeth_get_mtu_outof_framesize(framesize);
	} else {
		mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
	}
	*(u16 *)reply->param = mtu;

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

static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
{
	if (IS_OSN(card))
		return QETH_PROT_OSN2;
	return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
}

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

	QETH_CARD_TEXT(card, 2, "ulpenabl");

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

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

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

	QETH_CARD_TEXT(card, 2, "ulpstpcb");

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

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

	QETH_CARD_TEXT(card, 2, "ulpsetup");

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

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

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

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

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

	newbuf->buffer = q->qdio_bufs[bidx];
	skb_queue_head_init(&newbuf->skb_list);
	lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
	newbuf->q = q;
	newbuf->next_pending = q->bufs[bidx];
	atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
	q->bufs[bidx] = newbuf;
	return 0;
}

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

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

static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
{
	struct qeth_qdio_out_q *q = kzalloc(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 void qeth_tx_completion_timer(struct timer_list *timer)
{
	struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);

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

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

	QETH_CARD_TEXT(card, 2, "allcqdbf");

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

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

		queue = qeth_alloc_output_queue();
		if (!queue)
			goto out_freeoutq;
		QETH_CARD_TEXT_(card, 2, "outq %i", i);
		QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
		card->qdio.out_qs[i] = queue;
		queue->card = card;
		queue->queue_no = i;
		timer_setup(&queue->timer, qeth_tx_completion_timer, 0);

		/* give outbound qeth_qdio_buffers their qdio_buffers */
		for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
			WARN_ON(queue->bufs[j]);
			if (qeth_init_qdio_out_buf(queue, 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_output_queue(card->qdio.out_qs[--i]);
		card->qdio.out_qs[i] = NULL;
	}
	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_queues(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 */
	for (i = 0; i < card->qdio.no_out_queues; i++) {
		qeth_free_output_queue(card->qdio.out_qs[i]);
		card->qdio.out_qs[i] = NULL;
	}
}

static void qeth_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_CARD_TEXT(card, 3, "qdioact");
	return qdio_activate(CARD_DDEV(card));
}

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

	QETH_CARD_TEXT(card, 2, "dmact");

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

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

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

	QETH_CARD_TEXT(card, 2, "mpcinit");

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

	return 0;
}

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 (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
			card->info.mcl_level[0] = (char) _ebcasc[(__u8)
				card->info.mcl_level[0]];
			card->info.mcl_level[1] = (char) _ebcasc[(__u8)
				card->info.mcl_level[1]];
			card->info.mcl_level[2] = (char) _ebcasc[(__u8)
				card->info.mcl_level[2]];
			card->info.mcl_level[3] = (char) _ebcasc[(__u8)
				card->info.mcl_level[3]];
			card->info.mcl_level[QETH_MCL_LENGTH] = 0;
		}
		break;
	default:
		memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
	}
	dev_info(&card->gdev->dev,
		 "Device is a%s card%s%s%s\nwith link type %s.\n",
		 qeth_get_cardname(card),
		 (card->info.mcl_level[0]) ? " (level: " : "",
		 (card->info.mcl_level[0]) ? card->info.mcl_level : "",
		 (card->info.mcl_level[0]) ? ")" : "",
		 qeth_get_cardname_short(card));
}
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);
				QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
			}
		}
	}
	list_del_init(&entry->list);
	return entry;
}

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

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

	/*
	 * 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)
{
	unsigned int i;
	int rc;

	QETH_CARD_TEXT(card, 2, "initqdqs");

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

	qeth_initialize_working_pool_list(card);
	/*give only as many buffers to hardware as we have buffer pool entries*/
	for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
		rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
		if (rc)
			return rc;
	}

	card->qdio.in_q->next_buf_to_init =
		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_CARD_TEXT_(card, 2, "1err%d", rc);
		return rc;
	}

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

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

		qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
		queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
		queue->next_buf_to_fill = 0;
		queue->do_pack = 0;
		queue->prev_hdr = NULL;
		queue->bulk_start = 0;
		atomic_set(&queue->used_buffers, 0);
		atomic_set(&queue->set_pci_flags_count, 0);
		atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
		netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
	}
	return 0;
}
EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);

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

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

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

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

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

struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
					   enum qeth_ipa_cmds cmd_code,
					   enum qeth_prot_versions prot,
					   unsigned int data_length)
{
	enum qeth_link_types link_type = card->info.link_type;
	struct qeth_cmd_buffer *iob;
	struct qeth_ipacmd_hdr *hdr;

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

	qeth_prepare_ipa_cmd(card, iob, data_length);

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

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

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

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

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

	QETH_CARD_TEXT(card, 4, "sendipa");

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "strtlan");

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

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

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

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

	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_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
	}
	card->options.adp.supported_funcs =
		cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
	return 0;
}

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

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

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

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

	QETH_CARD_TEXT(card, 3, "queryadp");