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/io.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/mii.h>
#include <linux/mm.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <linux/netdevice.h>
#include <linux/netdev_features.h>
#include <linux/rcutree.h>
#include <linux/skbuff.h>
#include <linux/vmalloc.h>

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

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

#include "qeth_core.h"

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

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

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

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

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

/* max length to be returned: 14 */
const char *qeth_get_cardname_short(struct qeth_card *card)
{
	if (IS_VM_NIC(card)) {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			return "Virt.NIC QDIO";
		case QETH_CARD_TYPE_IQD:
			return "Virt.NIC Hiper";
		case QETH_CARD_TYPE_OSM:
			return "Virt.NIC OSM";
		case QETH_CARD_TYPE_OSX:
			return "Virt.NIC OSX";
		default:
			return "unknown";
		}
	} else {
		switch (card->info.type) {
		case QETH_CARD_TYPE_OSD:
			switch (card->info.link_type) {
			case QETH_LINK_TYPE_FAST_ETH:
				return "OSD_100";
			case QETH_LINK_TYPE_HSTR:
				return "HSTR";
			case QETH_LINK_TYPE_GBIT_ETH:
				return "OSD_1000";
			case QETH_LINK_TYPE_10GBIT_ETH:
				return "OSD_10GIG";
			case QETH_LINK_TYPE_25GBIT_ETH:
				return "OSD_25GIG";
			case QETH_LINK_TYPE_LANE_ETH100:
				return "OSD_FE_LANE";
			case QETH_LINK_TYPE_LANE_TR:
				return "OSD_TR_LANE";
			case QETH_LINK_TYPE_LANE_ETH1000:
				return "OSD_GbE_LANE";
			case QETH_LINK_TYPE_LANE:
				return "OSD_ATM_LANE";
			default:
				return "OSD_Express";
			}
		case QETH_CARD_TYPE_IQD:
			return "HiperSockets";
		case QETH_CARD_TYPE_OSM:
			return "OSM_1000";
		case QETH_CARD_TYPE_OSX:
			return "OSX_10GIG";
		default:
			return "unknown";
		}
	}
	return "n/a";
}

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

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

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

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

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

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

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

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

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

	kfree(entry);
}

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

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

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

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

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

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

	return entry;
}

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "realcbp");

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

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

		delta++;
	}

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

			return -ENOMEM;
		}

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

		delta--;
	}

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

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

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

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

static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
{
	struct qeth_qdio_q *q = kzalloc(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 = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
		if (rc) {
			QETH_CARD_TEXT_(card, 2, "1err%d", rc);
			goto out;
		}
	}
	rc = 0;
out:
	return rc;
}

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

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

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

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

	return n;
}

static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
{
	if (refcount_dec_and_test(&iob->ref_count)) {
		kfree(iob->data);
		kfree(iob);
	}
}
static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
			   void *data)
{
	ccw->cmd_code = cmd_code;
	ccw->flags = flags | CCW_FLAG_SLI;
	ccw->count = len;
	ccw->cda = (__u32)virt_to_phys(data);
}

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

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

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

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

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

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

	return ret;
}

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

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

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

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

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

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

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

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

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

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

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

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

		if (duplicate)
			continue;

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

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

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

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

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

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

		if (duplicate)
			continue;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	return is_local;
}

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

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

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

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

	return is_local;
}

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

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

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);

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

	ipa_name = qeth_get_ipa_cmd_name(com);

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

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

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

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

		link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
	}
}

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 4, "clipalst");

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

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

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

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

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

	if (length > QETH_BUFSIZE)
		return NULL;

	iob = kzalloc(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);
	refcount_set(&iob->ref_count, 1);
	iob->channel = channel;
	iob->timeout = timeout;
	iob->length = length;
	return iob;
}

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

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

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

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

	if (!request)
		goto out;

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

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

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

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

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

	return rc;
}

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "startrec");

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

	return rc;
}

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 5, "irq");

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

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

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

	qeth_unlock_channel(card, channel);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

		napi_consume_skb(skb, budget);
	}
}

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

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

	qeth_tx_complete_buf(queue, buf, error, budget);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	card->qdio.no_out_queues = max;
}

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

	QETH_CARD_TEXT(card, 2, "chp_desc");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	QETH_DBF_TEXT(SETUP, 2, "alloccrd");
	card = kzalloc(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;

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

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

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

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

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

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

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

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

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

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

	rc = ccw_device_set_offline(cdev);

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

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

	return rc;
}

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

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

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

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

	return 0;

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 3, "clhacrd");

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

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

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

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

	QETH_CARD_TEXT(card, 2, "vmlayer");

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

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

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

	return disc;
}

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

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

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

	card->token.issuer_rm_w = 0x00010103UL;
	card->token.cm_filter_w = 0x00010108UL;
	card->token.cm_connection_w = 0x0001010aUL;
	card->token.ulp_filter_w = 0x0001010bUL;
	card->token.ulp_connection_w = 0x0001010dUL;

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

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

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

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

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

	iob->callback = qeth_release_buffer_cb;
}

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "sendctl");

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

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

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

	qeth_enqueue_cmd(card, iob);

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

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

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

	qeth_dequeue_cmd(card, iob);

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

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

out:
	qeth_put_cmd(iob);
	return rc;
}

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

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

	QETH_CARD_TEXT(card, 2, "cfgunit");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "idxrdcb");

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "idxwrcb");

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "idxread");

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

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

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

	channel->state = CH_STATE_UP;
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "idxwrite");

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

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

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

	channel->state = CH_STATE_UP;
	return 0;
}

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

	QETH_CARD_TEXT(card, 2, "cmenblcb");

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

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

	QETH_CARD_TEXT(card, 2, "cmenable");

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

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

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

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

	QETH_CARD_TEXT(card, 2, "cmsetpcb");

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

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

	QETH_CARD_TEXT(card, 2, "cmsetup");

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

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

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

	return true;
}

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "ulpenacb");

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

	memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
	if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
		memcpy(&link_type,
		       QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
		if (!qeth_is_supported_link_type(card, link_type))
			return -EPROTONOSUPPORT;
	}

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

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

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

	QETH_CARD_TEXT(card, 2, "ulpenabl");

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

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

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

	QETH_CARD_TEXT(card, 2, "ulpstpcb");

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

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

	QETH_CARD_TEXT(card, 2, "ulpsetup");

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

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

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

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

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

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

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

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

static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
{
	struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
	unsigned int i;

	if (!q)
		return NULL;

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

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

	return q;

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

static void qeth_tx_completion_timer(struct timer_list *timer)
{
	struct qeth_qdio_out_q *queue = 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)
{
	unsigned int i;

	QETH_CARD_TEXT(card, 2, "allcqdbf");

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

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

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

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

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

	return 0;

out_freeoutq:
	while (i > 0) {
		qeth_free_output_queue(card->qdio.out_qs[--i]);
		card->qdio.out_qs[i] = NULL;
	}
	qeth_free_buffer_pool(card);
out_buffer_pool:
	atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
	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);
	for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
		if (card->qdio.in_q->bufs[j].rx_skb) {
			consume_skb(card->qdio.in_q->bufs[j].rx_skb);
			card->qdio.in_q->bufs[j].rx_skb = NULL;
		}
	}

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

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

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

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

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

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

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

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

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

	QETH_CARD_TEXT(card, 2, "dmact");

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

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

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

	QETH_CARD_TEXT(card, 2, "mpcinit");

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

	return 0;
}

static void qeth_print_status_message(struct qeth_card *card)
{
	switch (card->info.type) {
	case QETH_CARD_TYPE_OSD:
	case QETH_CARD_TYPE_OSM:
	case QETH_CARD_TYPE_OSX:
		/* VM will use a non-zero first character
		 * to indicate a HiperSockets like reporting
		 * of the level OSA sets the first character to zero
		 * */
		if (!card->info.mcl_level[0]) {
			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));
}

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

	QETH_CARD_TEXT(card, 5, "inwrklst");

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

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

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

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

	/* no free buffer in pool so take first one and swap pages */
	entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
				 struct qeth_buffer_pool_entry, list);
	for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
		if (page_count(entry->elements[i]) > 1) {
			struct page *page = dev_alloc_page();

			if (!page)
				return NULL;

			__free_page(entry->elements[i]);
			entry->elements[i] = page;
			QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
		}
	}
	list_del_init(&entry->list);
	return entry;
}

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

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

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

		buf->pool_entry = pool_entry;
	}

	/*
	 * since the buffer is accessed only from the input_tasklet
	 * there shouldn't be a need to synchronize; also, since we use
	 * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
	 * buffers
	 */
	for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
		buf->buffer->element[i].length = PAGE_SIZE;
		buf->buffer->element[i].addr =
			page_to_phys(pool_entry->elements[i]);
		if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
			buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
		else
			buf->buffer->element[i].eflags = 0;
		buf->buffer->element[i].sflags = 0;