Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2470 insertions, 0 deletions

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
new file mode 100644
index 000000000..9ef2118fc
--- /dev/null
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -0,0 +1,2470 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *    Copyright IBM Corp. 2007, 2009
+ *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
+ *		 Frank Pavlic <fpavlic@de.ibm.com>,
+ *		 Thomas Spatzier <tspat@de.ibm.com>,
+ *		 Frank Blaschka <frank.blaschka@de.ibm.com>
+ */
+
+#define KMSG_COMPONENT "qeth"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/list.h>
+#include <linux/hash.h>
+#include <linux/hashtable.h>
+#include <net/switchdev.h>
+#include <asm/chsc.h>
+#include <asm/css_chars.h>
+#include <asm/setup.h>
+#include "qeth_core.h"
+#include "qeth_l2.h"
+
+static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
+{
+	int rc;
+
+	if (retcode)
+		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
+	switch (retcode) {
+	case IPA_RC_SUCCESS:
+		rc = 0;
+		break;
+	case IPA_RC_L2_UNSUPPORTED_CMD:
+		rc = -EOPNOTSUPP;
+		break;
+	case IPA_RC_L2_ADDR_TABLE_FULL:
+		rc = -ENOSPC;
+		break;
+	case IPA_RC_L2_DUP_MAC:
+	case IPA_RC_L2_DUP_LAYER3_MAC:
+		rc = -EADDRINUSE;
+		break;
+	case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
+	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
+		rc = -EADDRNOTAVAIL;
+		break;
+	case IPA_RC_L2_MAC_NOT_FOUND:
+		rc = -ENOENT;
+		break;
+	default:
+		rc = -EIO;
+		break;
+	}
+	return rc;
+}
+
+static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
+				     struct qeth_reply *reply,
+				     unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+
+	return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
+}
+
+static int qeth_l2_send_setdelmac(struct qeth_card *card, const __u8 *mac,
+			   enum qeth_ipa_cmds ipacmd)
+{
+	struct qeth_ipa_cmd *cmd;
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT(card, 2, "L2sdmac");
+	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
+				 IPA_DATA_SIZEOF(setdelmac));
+	if (!iob)
+		return -ENOMEM;
+	cmd = __ipa_cmd(iob);
+	cmd->data.setdelmac.mac_length = ETH_ALEN;
+	ether_addr_copy(cmd->data.setdelmac.mac, mac);
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
+}
+
+static int qeth_l2_send_setmac(struct qeth_card *card, const __u8 *mac)
+{
+	int rc;
+
+	QETH_CARD_TEXT(card, 2, "L2Setmac");
+	rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
+	if (rc == 0) {
+		dev_info(&card->gdev->dev,
+			 "MAC address %pM successfully registered\n", mac);
+	} else {
+		switch (rc) {
+		case -EADDRINUSE:
+			dev_warn(&card->gdev->dev,
+				"MAC address %pM already exists\n", mac);
+			break;
+		case -EADDRNOTAVAIL:
+			dev_warn(&card->gdev->dev,
+				"MAC address %pM is not authorized\n", mac);
+			break;
+		}
+	}
+	return rc;
+}
+
+static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
+{
+	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
+					IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
+	int rc;
+
+	QETH_CARD_TEXT(card, 2, "L2Wmac");
+	rc = qeth_l2_send_setdelmac(card, mac, cmd);
+	if (rc == -EADDRINUSE)
+		QETH_DBF_MESSAGE(2, "MAC address %012llx is already registered on device %x\n",
+				 ether_addr_to_u64(mac), CARD_DEVID(card));
+	else if (rc)
+		QETH_DBF_MESSAGE(2, "Failed to register MAC address %012llx on device %x: %d\n",
+				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
+	return rc;
+}
+
+static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
+{
+	enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
+					IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
+	int rc;
+
+	QETH_CARD_TEXT(card, 2, "L2Rmac");
+	rc = qeth_l2_send_setdelmac(card, mac, cmd);
+	if (rc)
+		QETH_DBF_MESSAGE(2, "Failed to delete MAC address %012llx on device %x: %d\n",
+				 ether_addr_to_u64(mac), CARD_DEVID(card), rc);
+	return rc;
+}
+
+static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
+{
+	struct qeth_mac *mac;
+	struct hlist_node *tmp;
+	int i;
+
+	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
+		hash_del(&mac->hnode);
+		kfree(mac);
+	}
+}
+
+static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
+				struct qeth_hdr *hdr, struct sk_buff *skb,
+				__be16 proto, unsigned int data_len)
+{
+	int cast_type = qeth_get_ether_cast_type(skb);
+	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
+
+	hdr->hdr.l2.pkt_length = data_len;
+
+	if (skb_is_gso(skb)) {
+		hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
+	} else {
+		hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
+		if (skb->ip_summed == CHECKSUM_PARTIAL)
+			qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], proto);
+	}
+
+	/* set byte byte 3 to casting flags */
+	if (cast_type == RTN_MULTICAST)
+		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
+	else if (cast_type == RTN_BROADCAST)
+		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
+	else
+		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
+
+	/* VSWITCH relies on the VLAN
+	 * information to be present in
+	 * the QDIO header */
+	if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
+		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
+		hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
+	}
+}
+
+static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
+{
+	if (retcode)
+		QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
+
+	switch (retcode) {
+	case IPA_RC_SUCCESS:
+		return 0;
+	case IPA_RC_L2_INVALID_VLAN_ID:
+		return -EINVAL;
+	case IPA_RC_L2_DUP_VLAN_ID:
+		return -EEXIST;
+	case IPA_RC_L2_VLAN_ID_NOT_FOUND:
+		return -ENOENT;
+	case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
+		return -EPERM;
+	default:
+		return -EIO;
+	}
+}
+
+static int qeth_l2_send_setdelvlan_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, 2, "L2sdvcb");
+	if (cmd->hdr.return_code) {
+		QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
+				 cmd->data.setdelvlan.vlan_id,
+				 CARD_DEVID(card), cmd->hdr.return_code);
+		QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
+	}
+	return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
+}
+
+static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
+				   enum qeth_ipa_cmds ipacmd)
+{
+	struct qeth_ipa_cmd *cmd;
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
+	iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
+				 IPA_DATA_SIZEOF(setdelvlan));
+	if (!iob)
+		return -ENOMEM;
+	cmd = __ipa_cmd(iob);
+	cmd->data.setdelvlan.vlan_id = i;
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
+}
+
+static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
+				   __be16 proto, u16 vid)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
+	if (!vid)
+		return 0;
+
+	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
+}
+
+static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
+				    __be16 proto, u16 vid)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
+	if (!vid)
+		return 0;
+
+	return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
+}
+
+static void qeth_l2_set_pnso_mode(struct qeth_card *card,
+				  enum qeth_pnso_mode mode)
+{
+	spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
+	WRITE_ONCE(card->info.pnso_mode, mode);
+	spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
+
+	if (mode == QETH_PNSO_NONE)
+		drain_workqueue(card->event_wq);
+}
+
+static void qeth_l2_dev2br_fdb_flush(struct qeth_card *card)
+{
+	struct switchdev_notifier_fdb_info info = {};
+
+	QETH_CARD_TEXT(card, 2, "fdbflush");
+
+	info.addr = NULL;
+	/* flush all VLANs: */
+	info.vid = 0;
+	info.added_by_user = false;
+	info.offloaded = true;
+
+	call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
+				 card->dev, &info.info, NULL);
+}
+
+static int qeth_l2_request_initial_mac(struct qeth_card *card)
+{
+	int rc = 0;
+
+	QETH_CARD_TEXT(card, 2, "l2reqmac");
+
+	if (MACHINE_IS_VM) {
+		rc = qeth_vm_request_mac(card);
+		if (!rc)
+			goto out;
+		QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
+				 CARD_DEVID(card), rc);
+		QETH_CARD_TEXT_(card, 2, "err%04x", rc);
+		/* fall back to alternative mechanism: */
+	}
+
+	rc = qeth_setadpparms_change_macaddr(card);
+	if (!rc)
+		goto out;
+	QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
+			 CARD_DEVID(card), rc);
+	QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
+
+	/* Fall back once more, but some devices don't support a custom MAC
+	 * address:
+	 */
+	if (IS_OSM(card) || IS_OSX(card))
+		return (rc) ? rc : -EADDRNOTAVAIL;
+	eth_hw_addr_random(card->dev);
+
+out:
+	QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
+	return 0;
+}
+
+static void qeth_l2_register_dev_addr(struct qeth_card *card)
+{
+	if (!is_valid_ether_addr(card->dev->dev_addr))
+		qeth_l2_request_initial_mac(card);
+
+	if (!qeth_l2_send_setmac(card, card->dev->dev_addr))
+		card->info.dev_addr_is_registered = 1;
+	else
+		card->info.dev_addr_is_registered = 0;
+}
+
+static int qeth_l2_validate_addr(struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	if (card->info.dev_addr_is_registered)
+		return eth_validate_addr(dev);
+
+	QETH_CARD_TEXT(card, 4, "nomacadr");
+	return -EPERM;
+}
+
+static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
+{
+	struct sockaddr *addr = p;
+	struct qeth_card *card = dev->ml_priv;
+	u8 old_addr[ETH_ALEN];
+	int rc = 0;
+
+	QETH_CARD_TEXT(card, 3, "setmac");
+
+	if (IS_OSM(card) || IS_OSX(card)) {
+		QETH_CARD_TEXT(card, 3, "setmcTYP");
+		return -EOPNOTSUPP;
+	}
+	QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	/* don't register the same address twice */
+	if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
+	    card->info.dev_addr_is_registered)
+		return 0;
+
+	/* add the new address, switch over, drop the old */
+	rc = qeth_l2_send_setmac(card, addr->sa_data);
+	if (rc)
+		return rc;
+	ether_addr_copy(old_addr, dev->dev_addr);
+	eth_hw_addr_set(dev, addr->sa_data);
+
+	if (card->info.dev_addr_is_registered)
+		qeth_l2_remove_mac(card, old_addr);
+	card->info.dev_addr_is_registered = 1;
+	return 0;
+}
+
+static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
+{
+	int role;
+	int rc;
+
+	QETH_CARD_TEXT(card, 3, "pmisc2br");
+
+	if (enable) {
+		if (card->options.sbp.reflect_promisc_primary)
+			role = QETH_SBP_ROLE_PRIMARY;
+		else
+			role = QETH_SBP_ROLE_SECONDARY;
+	} else
+		role = QETH_SBP_ROLE_NONE;
+
+	rc = qeth_bridgeport_setrole(card, role);
+	QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
+	if (!rc) {
+		card->options.sbp.role = role;
+		card->info.promisc_mode = enable;
+	}
+}
+
+static void qeth_l2_set_promisc_mode(struct qeth_card *card)
+{
+	bool enable = card->dev->flags & IFF_PROMISC;
+
+	if (card->info.promisc_mode == enable)
+		return;
+
+	if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
+		qeth_setadp_promisc_mode(card, enable);
+	} else {
+		mutex_lock(&card->sbp_lock);
+		if (card->options.sbp.reflect_promisc)
+			qeth_l2_promisc_to_bridge(card, enable);
+		mutex_unlock(&card->sbp_lock);
+	}
+}
+
+/* New MAC address is added to the hash table and marked to be written on card
+ * only if there is not in the hash table storage already
+ *
+*/
+static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
+{
+	u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
+	struct qeth_mac *mac;
+
+	hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
+		if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
+			mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
+			return;
+		}
+	}
+
+	mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
+	if (!mac)
+		return;
+
+	ether_addr_copy(mac->mac_addr, ha->addr);
+	mac->disp_flag = QETH_DISP_ADDR_ADD;
+
+	hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
+}
+
+static void qeth_l2_rx_mode_work(struct work_struct *work)
+{
+	struct qeth_card *card = container_of(work, struct qeth_card,
+					      rx_mode_work);
+	struct net_device *dev = card->dev;
+	struct netdev_hw_addr *ha;
+	struct qeth_mac *mac;
+	struct hlist_node *tmp;
+	int i;
+	int rc;
+
+	QETH_CARD_TEXT(card, 3, "setmulti");
+
+	netif_addr_lock_bh(dev);
+	netdev_for_each_mc_addr(ha, dev)
+		qeth_l2_add_mac(card, ha);
+	netdev_for_each_uc_addr(ha, dev)
+		qeth_l2_add_mac(card, ha);
+	netif_addr_unlock_bh(dev);
+
+	hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
+		switch (mac->disp_flag) {
+		case QETH_DISP_ADDR_DELETE:
+			qeth_l2_remove_mac(card, mac->mac_addr);
+			hash_del(&mac->hnode);
+			kfree(mac);
+			break;
+		case QETH_DISP_ADDR_ADD:
+			rc = qeth_l2_write_mac(card, mac->mac_addr);
+			if (rc) {
+				hash_del(&mac->hnode);
+				kfree(mac);
+				break;
+			}
+			fallthrough;
+		default:
+			/* for next call to set_rx_mode(): */
+			mac->disp_flag = QETH_DISP_ADDR_DELETE;
+		}
+	}
+
+	qeth_l2_set_promisc_mode(card);
+}
+
+static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
+					   struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+	u16 txq = skb_get_queue_mapping(skb);
+	struct qeth_qdio_out_q *queue;
+	int rc;
+
+	if (!skb_is_gso(skb))
+		qdisc_skb_cb(skb)->pkt_len = skb->len;
+	if (IS_IQD(card))
+		txq = qeth_iqd_translate_txq(dev, txq);
+	queue = card->qdio.out_qs[txq];
+
+	rc = qeth_xmit(card, skb, queue, vlan_get_protocol(skb),
+		       qeth_l2_fill_header);
+	if (!rc)
+		return NETDEV_TX_OK;
+
+	QETH_TXQ_STAT_INC(queue, tx_dropped);
+	kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+static u16 qeth_l2_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
+				    struct net_device *sb_dev)
+{
+	return qeth_iqd_select_queue(dev, skb, qeth_get_ether_cast_type(skb),
+				     sb_dev);
+}
+
+static void qeth_l2_set_rx_mode(struct net_device *dev)
+{
+	struct qeth_card *card = dev->ml_priv;
+
+	schedule_work(&card->rx_mode_work);
+}
+
+/**
+ *	qeth_l2_pnso() - perform network subchannel operation
+ *	@card: qeth_card structure pointer
+ *	@oc: Operation Code
+ *	@cnc: Boolean Change-Notification Control
+ *	@cb: Callback function will be executed for each element
+ *		of the address list
+ *	@priv: Pointer to pass to the callback function.
+ *
+ *	Collects network information in a network address list and calls the
+ *	callback function for every entry in the list. If "change-notification-
+ *	control" is set, further changes in the address list will be reported
+ *	via the IPA command.
+ */
+static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
+			void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
+			void *priv)
+{
+	struct ccw_device *ddev = CARD_DDEV(card);
+	struct chsc_pnso_area *rr;
+	u32 prev_instance = 0;
+	int isfirstblock = 1;
+	int i, size, elems;
+	int rc;
+
+	rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
+	if (rr == NULL)
+		return -ENOMEM;
+	do {
+		QETH_CARD_TEXT(card, 2, "PNSO");
+		/* on the first iteration, naihdr.resume_token will be zero */
+		rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
+				     cnc);
+		if (rc)
+			continue;
+		if (cb == NULL)
+			continue;
+
+		size = rr->naihdr.naids;
+		if (size != sizeof(struct chsc_pnso_naid_l2)) {
+			WARN_ON_ONCE(1);
+			continue;
+		}
+
+		elems = (rr->response.length - sizeof(struct chsc_header) -
+			 sizeof(struct chsc_pnso_naihdr)) / size;
+
+		if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
+			/* Inform the caller that they need to scrap */
+			/* the data that was already reported via cb */
+			rc = -EAGAIN;
+			break;
+		}
+		isfirstblock = 0;
+		prev_instance = rr->naihdr.instance;
+		for (i = 0; i < elems; i++)
+			(*cb)(priv, &rr->entries[i]);
+	} while ((rc == -EBUSY) || (!rc && /* list stored */
+		   /* resume token is non-zero => list incomplete */
+		   (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
+
+	if (rc)
+		QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
+
+	free_page((unsigned long)rr);
+	return rc;
+}
+
+static bool qeth_is_my_net_if_token(struct qeth_card *card,
+				    struct net_if_token *token)
+{
+	return ((card->info.ddev_devno == token->devnum) &&
+		(card->info.cssid == token->cssid) &&
+		(card->info.iid == token->iid) &&
+		(card->info.ssid == token->ssid) &&
+		(card->info.chpid == token->chpid) &&
+		(card->info.chid == token->chid));
+}
+
+/**
+ *	qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
+ *	@card:	qeth_card structure pointer
+ *	@code:	event bitmask: high order bit 0x80 set to
+ *				1 - removal of an object
+ *				0 - addition of an object
+ *			       Object type(s):
+ *				0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
+ *	@token: "network token" structure identifying 'physical' location
+ *		of the target
+ *	@addr_lnid: structure with MAC address and VLAN ID of the target
+ */
+static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
+				      struct net_if_token *token,
+				      struct mac_addr_lnid *addr_lnid)
+{
+	struct switchdev_notifier_fdb_info info = {};
+	u8 ntfy_mac[ETH_ALEN];
+
+	ether_addr_copy(ntfy_mac, addr_lnid->mac);
+	/* Ignore VLAN only changes */
+	if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
+		return;
+	/* Ignore mcast entries */
+	if (is_multicast_ether_addr(ntfy_mac))
+		return;
+	/* Ignore my own addresses */
+	if (qeth_is_my_net_if_token(card, token))
+		return;
+
+	info.addr = ntfy_mac;
+	/* don't report VLAN IDs */
+	info.vid = 0;
+	info.added_by_user = false;
+	info.offloaded = true;
+
+	if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
+		call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
+					 card->dev, &info.info, NULL);
+		QETH_CARD_TEXT(card, 4, "andelmac");
+		QETH_CARD_TEXT_(card, 4,
+				"mc%012llx", ether_addr_to_u64(ntfy_mac));
+	} else {
+		call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
+					 card->dev, &info.info, NULL);
+		QETH_CARD_TEXT(card, 4, "anaddmac");
+		QETH_CARD_TEXT_(card, 4,
+				"mc%012llx", ether_addr_to_u64(ntfy_mac));
+	}
+}
+
+static void qeth_l2_dev2br_an_set_cb(void *priv,
+				     struct chsc_pnso_naid_l2 *entry)
+{
+	u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
+	struct qeth_card *card = priv;
+
+	if (entry->addr_lnid.lnid < VLAN_N_VID)
+		code |= IPA_ADDR_CHANGE_CODE_VLANID;
+	qeth_l2_dev2br_fdb_notify(card, code,
+				  (struct net_if_token *)&entry->nit,
+				  (struct mac_addr_lnid *)&entry->addr_lnid);
+}
+
+/**
+ *	qeth_l2_dev2br_an_set() -
+ *	Enable or disable 'dev to bridge network address notification'
+ *	@card: qeth_card structure pointer
+ *	@enable: Enable or disable 'dev to bridge network address notification'
+ *
+ *	Returns negative errno-compatible error indication or 0 on success.
+ *
+ *	On enable, emits a series of address notifications for all
+ *	currently registered hosts.
+ */
+static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
+{
+	int rc;
+
+	if (enable) {
+		QETH_CARD_TEXT(card, 2, "anseton");
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
+				  qeth_l2_dev2br_an_set_cb, card);
+		if (rc == -EAGAIN)
+			/* address notification enabled, but inconsistent
+			 * addresses reported -> disable address notification
+			 */
+			qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
+				     NULL, NULL);
+	} else {
+		QETH_CARD_TEXT(card, 2, "ansetoff");
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
+	}
+
+	return rc;
+}
+
+struct qeth_l2_br2dev_event_work {
+	struct work_struct work;
+	struct net_device *br_dev;
+	struct net_device *lsync_dev;
+	struct net_device *dst_dev;
+	unsigned long event;
+	unsigned char addr[ETH_ALEN];
+};
+
+static const struct net_device_ops qeth_l2_iqd_netdev_ops;
+static const struct net_device_ops qeth_l2_osa_netdev_ops;
+
+static bool qeth_l2_must_learn(struct net_device *netdev,
+			       struct net_device *dstdev)
+{
+	struct qeth_priv *priv;
+
+	priv = netdev_priv(netdev);
+	return (netdev != dstdev &&
+		(priv->brport_features & BR_LEARNING_SYNC) &&
+		!(br_port_flag_is_set(netdev, BR_ISOLATED) &&
+		  br_port_flag_is_set(dstdev, BR_ISOLATED)) &&
+		(netdev->netdev_ops == &qeth_l2_iqd_netdev_ops ||
+		 netdev->netdev_ops == &qeth_l2_osa_netdev_ops));
+}
+
+/**
+ *	qeth_l2_br2dev_worker() - update local MACs
+ *	@work: bridge to device FDB update
+ *
+ *	Update local MACs of a learning_sync bridgeport so it can receive
+ *	messages for a destination port.
+ *	In case of an isolated learning_sync port, also update its isolated
+ *	siblings.
+ */
+static void qeth_l2_br2dev_worker(struct work_struct *work)
+{
+	struct qeth_l2_br2dev_event_work *br2dev_event_work =
+		container_of(work, struct qeth_l2_br2dev_event_work, work);
+	struct net_device *lsyncdev = br2dev_event_work->lsync_dev;
+	struct net_device *dstdev = br2dev_event_work->dst_dev;
+	struct net_device *brdev = br2dev_event_work->br_dev;
+	unsigned long event = br2dev_event_work->event;
+	unsigned char *addr = br2dev_event_work->addr;
+	struct qeth_card *card = lsyncdev->ml_priv;
+	struct net_device *lowerdev;
+	struct list_head *iter;
+	int err = 0;
+
+	QETH_CARD_TEXT_(card, 4, "b2dw%04lx", event);
+	QETH_CARD_TEXT_(card, 4, "ma%012llx", ether_addr_to_u64(addr));
+
+	rcu_read_lock();
+	/* Verify preconditions are still valid: */
+	if (!netif_is_bridge_port(lsyncdev) ||
+	    brdev != netdev_master_upper_dev_get_rcu(lsyncdev))
+		goto unlock;
+	if (!qeth_l2_must_learn(lsyncdev, dstdev))
+		goto unlock;
+
+	if (br_port_flag_is_set(lsyncdev, BR_ISOLATED)) {
+		/* Update lsyncdev and its isolated sibling(s): */
+		iter = &brdev->adj_list.lower;
+		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
+		while (lowerdev) {
+			if (br_port_flag_is_set(lowerdev, BR_ISOLATED)) {
+				switch (event) {
+				case SWITCHDEV_FDB_ADD_TO_DEVICE:
+					err = dev_uc_add(lowerdev, addr);
+					break;
+				case SWITCHDEV_FDB_DEL_TO_DEVICE:
+					err = dev_uc_del(lowerdev, addr);
+					break;
+				default:
+					break;
+				}
+				if (err) {
+					QETH_CARD_TEXT(card, 2, "b2derris");
+					QETH_CARD_TEXT_(card, 2,
+							"err%02lx%03d", event,
+							lowerdev->ifindex);
+				}
+			}
+			lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
+		}
+	} else {
+		switch (event) {
+		case SWITCHDEV_FDB_ADD_TO_DEVICE:
+			err = dev_uc_add(lsyncdev, addr);
+			break;
+		case SWITCHDEV_FDB_DEL_TO_DEVICE:
+			err = dev_uc_del(lsyncdev, addr);
+			break;
+		default:
+			break;
+		}
+		if (err)
+			QETH_CARD_TEXT_(card, 2, "b2derr%02lx", event);
+	}
+
+unlock:
+	rcu_read_unlock();
+	dev_put(brdev);
+	dev_put(lsyncdev);
+	dev_put(dstdev);
+	kfree(br2dev_event_work);
+}
+
+static int qeth_l2_br2dev_queue_work(struct net_device *brdev,
+				     struct net_device *lsyncdev,
+				     struct net_device *dstdev,
+				     unsigned long event,
+				     const unsigned char *addr)
+{
+	struct qeth_l2_br2dev_event_work *worker_data;
+	struct qeth_card *card;
+
+	worker_data = kzalloc(sizeof(*worker_data), GFP_ATOMIC);
+	if (!worker_data)
+		return -ENOMEM;
+	INIT_WORK(&worker_data->work, qeth_l2_br2dev_worker);
+	worker_data->br_dev = brdev;
+	worker_data->lsync_dev = lsyncdev;
+	worker_data->dst_dev = dstdev;
+	worker_data->event = event;
+	ether_addr_copy(worker_data->addr, addr);
+
+	card = lsyncdev->ml_priv;
+	/* Take a reference on the sw port devices and the bridge */
+	dev_hold(brdev);
+	dev_hold(lsyncdev);
+	dev_hold(dstdev);
+	queue_work(card->event_wq, &worker_data->work);
+	return 0;
+}
+
+/* Called under rtnl_lock */
+static int qeth_l2_switchdev_event(struct notifier_block *unused,
+				   unsigned long event, void *ptr)
+{
+	struct net_device *dstdev, *brdev, *lowerdev;
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct switchdev_notifier_info *info = ptr;
+	struct list_head *iter;
+	struct qeth_card *card;
+	int rc;
+
+	if (!(event == SWITCHDEV_FDB_ADD_TO_DEVICE ||
+	      event == SWITCHDEV_FDB_DEL_TO_DEVICE))
+		return NOTIFY_DONE;
+
+	dstdev = switchdev_notifier_info_to_dev(info);
+	brdev = netdev_master_upper_dev_get_rcu(dstdev);
+	if (!brdev || !netif_is_bridge_master(brdev))
+		return NOTIFY_DONE;
+	fdb_info = container_of(info,
+				struct switchdev_notifier_fdb_info,
+				info);
+	iter = &brdev->adj_list.lower;
+	lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
+	while (lowerdev) {
+		if (qeth_l2_must_learn(lowerdev, dstdev)) {
+			card = lowerdev->ml_priv;
+			QETH_CARD_TEXT_(card, 4, "b2dqw%03lx", event);
+			rc = qeth_l2_br2dev_queue_work(brdev, lowerdev,
+						       dstdev, event,
+						       fdb_info->addr);
+			if (rc) {
+				QETH_CARD_TEXT(card, 2, "b2dqwerr");
+				return NOTIFY_BAD;
+			}
+		}
+		lowerdev = netdev_next_lower_dev_rcu(brdev, &iter);
+	}
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block qeth_l2_sw_notifier = {
+		.notifier_call = qeth_l2_switchdev_event,
+};
+
+static refcount_t qeth_l2_switchdev_notify_refcnt;
+
+/* Called under rtnl_lock */
+static void qeth_l2_br2dev_get(void)
+{
+	int rc;
+
+	if (!refcount_inc_not_zero(&qeth_l2_switchdev_notify_refcnt)) {
+		rc = register_switchdev_notifier(&qeth_l2_sw_notifier);
+		if (rc) {
+			QETH_DBF_MESSAGE(2,
+					 "failed to register qeth_l2_sw_notifier: %d\n",
+					 rc);
+		} else {
+			refcount_set(&qeth_l2_switchdev_notify_refcnt, 1);
+			QETH_DBF_MESSAGE(2, "qeth_l2_sw_notifier registered\n");
+		}
+	}
+	QETH_DBF_TEXT_(SETUP, 2, "b2d+%04d",
+		       qeth_l2_switchdev_notify_refcnt.refs.counter);
+}
+
+/* Called under rtnl_lock */
+static void qeth_l2_br2dev_put(void)
+{
+	int rc;
+
+	if (refcount_dec_and_test(&qeth_l2_switchdev_notify_refcnt)) {
+		rc = unregister_switchdev_notifier(&qeth_l2_sw_notifier);
+		if (rc) {
+			QETH_DBF_MESSAGE(2,
+					 "failed to unregister qeth_l2_sw_notifier: %d\n",
+					 rc);
+		} else {
+			QETH_DBF_MESSAGE(2,
+					 "qeth_l2_sw_notifier unregistered\n");
+		}
+	}
+	QETH_DBF_TEXT_(SETUP, 2, "b2d-%04d",
+		       qeth_l2_switchdev_notify_refcnt.refs.counter);
+}
+
+static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+				  struct net_device *dev, u32 filter_mask,
+				  int nlflags)
+{
+	struct qeth_priv *priv = netdev_priv(dev);
+	struct qeth_card *card = dev->ml_priv;
+	u16 mode = BRIDGE_MODE_UNDEF;
+
+	/* Do not even show qeth devs that cannot do bridge_setlink */
+	if (!priv->brport_hw_features || !netif_device_present(dev) ||
+	    qeth_bridgeport_is_in_use(card))
+		return -EOPNOTSUPP;
+
+	return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
+				       mode, priv->brport_features,
+				       priv->brport_hw_features,
+				       nlflags, filter_mask, NULL);
+}
+
+static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
+	[IFLA_BRPORT_LEARNING_SYNC]	= { .type = NLA_U8 },
+};
+
+/**
+ *	qeth_l2_bridge_setlink() - set bridgeport attributes
+ *	@dev: netdevice
+ *	@nlh: netlink message header
+ *	@flags: bridge flags (here: BRIDGE_FLAGS_SELF)
+ *	@extack: extended ACK report struct
+ *
+ *	Called under rtnl_lock
+ */
+static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
+				  u16 flags, struct netlink_ext_ack *extack)
+{
+	struct qeth_priv *priv = netdev_priv(dev);
+	struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
+	struct qeth_card *card = dev->ml_priv;
+	struct nlattr *attr, *nested_attr;
+	bool enable, has_protinfo = false;
+	int rem1, rem2;
+	int rc;
+
+	if (!netif_device_present(dev))
+		return -ENODEV;
+
+	nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
+		if (nla_type(attr) == IFLA_PROTINFO) {
+			rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
+					      qeth_brport_policy, extack);
+			if (rc)
+				return rc;
+			has_protinfo = true;
+		} else if (nla_type(attr) == IFLA_AF_SPEC) {
+			nla_for_each_nested(nested_attr, attr, rem2) {
+				if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
+					continue;
+				NL_SET_ERR_MSG_ATTR(extack, nested_attr,
+						    "Unsupported attribute");
+				return -EINVAL;
+			}
+		} else {
+			NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
+			return -EINVAL;
+		}
+	}
+	if (!has_protinfo)
+		return 0;
+	if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
+		return -EINVAL;
+	if (!(priv->brport_hw_features & BR_LEARNING_SYNC)) {
+		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
+				    "Operation not supported by HW");
+		return -EOPNOTSUPP;
+	}
+	if (!IS_ENABLED(CONFIG_NET_SWITCHDEV)) {
+		NL_SET_ERR_MSG_ATTR(extack, bp_tb[IFLA_BRPORT_LEARNING_SYNC],
+				    "Requires NET_SWITCHDEV");
+		return -EOPNOTSUPP;
+	}
+	enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
+
+	if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
+		return 0;
+
+	mutex_lock(&card->sbp_lock);
+	/* do not change anything if BridgePort is enabled */
+	if (qeth_bridgeport_is_in_use(card)) {
+		NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
+		rc = -EBUSY;
+	} else if (enable) {
+		qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
+		rc = qeth_l2_dev2br_an_set(card, true);
+		if (rc) {
+			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+		} else {
+			priv->brport_features |= BR_LEARNING_SYNC;
+			qeth_l2_br2dev_get();
+		}
+	} else {
+		rc = qeth_l2_dev2br_an_set(card, false);
+		if (!rc) {
+			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+			priv->brport_features ^= BR_LEARNING_SYNC;
+			qeth_l2_dev2br_fdb_flush(card);
+			qeth_l2_br2dev_put();
+		}
+	}
+	mutex_unlock(&card->sbp_lock);
+
+	return rc;
+}
+
+static const struct net_device_ops qeth_l2_iqd_netdev_ops = {
+	.ndo_open		= qeth_open,
+	.ndo_stop		= qeth_stop,
+	.ndo_get_stats64	= qeth_get_stats64,
+	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
+	.ndo_features_check	= qeth_features_check,
+	.ndo_select_queue	= qeth_l2_iqd_select_queue,
+	.ndo_validate_addr	= qeth_l2_validate_addr,
+	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
+	.ndo_eth_ioctl		= qeth_do_ioctl,
+	.ndo_siocdevprivate	= qeth_siocdevprivate,
+	.ndo_set_mac_address	= qeth_l2_set_mac_address,
+	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= qeth_l2_vlan_rx_kill_vid,
+	.ndo_tx_timeout		= qeth_tx_timeout,
+	.ndo_fix_features	= qeth_fix_features,
+	.ndo_set_features	= qeth_set_features,
+	.ndo_bridge_getlink	= qeth_l2_bridge_getlink,
+	.ndo_bridge_setlink	= qeth_l2_bridge_setlink,
+};
+
+static const struct net_device_ops qeth_l2_osa_netdev_ops = {
+	.ndo_open		= qeth_open,
+	.ndo_stop		= qeth_stop,
+	.ndo_get_stats64	= qeth_get_stats64,
+	.ndo_start_xmit		= qeth_l2_hard_start_xmit,
+	.ndo_features_check	= qeth_features_check,
+	.ndo_select_queue	= qeth_osa_select_queue,
+	.ndo_validate_addr	= qeth_l2_validate_addr,
+	.ndo_set_rx_mode	= qeth_l2_set_rx_mode,
+	.ndo_eth_ioctl		= qeth_do_ioctl,
+	.ndo_siocdevprivate	= qeth_siocdevprivate,
+	.ndo_set_mac_address    = qeth_l2_set_mac_address,
+	.ndo_vlan_rx_add_vid	= qeth_l2_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
+	.ndo_tx_timeout		= qeth_tx_timeout,
+	.ndo_fix_features	= qeth_fix_features,
+	.ndo_set_features	= qeth_set_features,
+};
+
+static int qeth_l2_setup_netdev(struct qeth_card *card)
+{
+	card->dev->netdev_ops = IS_IQD(card) ? &qeth_l2_iqd_netdev_ops :
+					       &qeth_l2_osa_netdev_ops;
+	card->dev->needed_headroom = sizeof(struct qeth_hdr);
+	card->dev->priv_flags |= IFF_UNICAST_FLT;
+
+	if (IS_OSM(card)) {
+		card->dev->features |= NETIF_F_VLAN_CHALLENGED;
+	} else {
+		if (!IS_VM_NIC(card))
+			card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+		card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
+	}
+
+	if (IS_OSD(card) && !IS_VM_NIC(card)) {
+		card->dev->features |= NETIF_F_SG;
+		/* OSA 3S and earlier has no RX/TX support */
+		if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
+			card->dev->hw_features |= NETIF_F_IP_CSUM;
+			card->dev->vlan_features |= NETIF_F_IP_CSUM;
+		}
+	}
+	if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
+		card->dev->hw_features |= NETIF_F_IPV6_CSUM;
+		card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
+	}
+	if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
+	    qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
+		card->dev->hw_features |= NETIF_F_RXCSUM;
+		card->dev->vlan_features |= NETIF_F_RXCSUM;
+	}
+	if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
+		card->dev->hw_features |= NETIF_F_TSO;
+		card->dev->vlan_features |= NETIF_F_TSO;
+	}
+	if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
+		card->dev->hw_features |= NETIF_F_TSO6;
+		card->dev->vlan_features |= NETIF_F_TSO6;
+	}
+
+	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
+		card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
+		netif_keep_dst(card->dev);
+		netif_set_tso_max_size(card->dev,
+				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
+	}
+
+	netif_napi_add(card->dev, &card->napi, qeth_poll);
+	return register_netdev(card->dev);
+}
+
+static void qeth_l2_trace_features(struct qeth_card *card)
+{
+	/* Set BridgePort features */
+	QETH_CARD_TEXT(card, 2, "featuSBP");
+	QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
+		      sizeof(card->options.sbp.supported_funcs));
+	/* VNIC Characteristics features */
+	QETH_CARD_TEXT(card, 2, "feaVNICC");
+	QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
+		      sizeof(card->options.vnicc.sup_chars));
+}
+
+static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
+{
+	if (!card->options.sbp.reflect_promisc &&
+	    card->options.sbp.role != QETH_SBP_ROLE_NONE) {
+		/* Conditional to avoid spurious error messages */
+		qeth_bridgeport_setrole(card, card->options.sbp.role);
+		/* Let the callback function refresh the stored role value. */
+		qeth_bridgeport_query_ports(card, &card->options.sbp.role,
+					    NULL);
+	}
+	if (card->options.sbp.hostnotification) {
+		if (qeth_bridgeport_an_set(card, 1))
+			card->options.sbp.hostnotification = 0;
+	}
+}
+
+/**
+ *	qeth_l2_detect_dev2br_support() -
+ *	Detect whether this card supports 'dev to bridge fdb network address
+ *	change notification' and thus can support the learning_sync bridgeport
+ *	attribute
+ *	@card: qeth_card structure pointer
+ */
+static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
+{
+	struct qeth_priv *priv = netdev_priv(card->dev);
+	bool dev2br_supported;
+
+	QETH_CARD_TEXT(card, 2, "d2brsup");
+	if (!IS_IQD(card))
+		return;
+
+	/* dev2br requires valid cssid,iid,chid */
+	dev2br_supported = card->info.ids_valid &&
+			   css_general_characteristics.enarf;
+	QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
+
+	if (dev2br_supported)
+		priv->brport_hw_features |= BR_LEARNING_SYNC;
+	else
+		priv->brport_hw_features &= ~BR_LEARNING_SYNC;
+}
+
+static void qeth_l2_enable_brport_features(struct qeth_card *card)
+{
+	struct qeth_priv *priv = netdev_priv(card->dev);
+	int rc;
+
+	if (priv->brport_features & BR_LEARNING_SYNC) {
+		if (priv->brport_hw_features & BR_LEARNING_SYNC) {
+			qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
+			rc = qeth_l2_dev2br_an_set(card, true);
+			if (rc == -EAGAIN) {
+				/* Recoverable error, retry once */
+				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+				qeth_l2_dev2br_fdb_flush(card);
+				qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
+				rc = qeth_l2_dev2br_an_set(card, true);
+			}
+			if (rc) {
+				netdev_err(card->dev,
+					   "failed to enable bridge learning_sync: %d\n",
+					   rc);
+				qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+				qeth_l2_dev2br_fdb_flush(card);
+				priv->brport_features ^= BR_LEARNING_SYNC;
+			}
+		} else {
+			dev_warn(&card->gdev->dev,
+				"bridge learning_sync not supported\n");
+			priv->brport_features ^= BR_LEARNING_SYNC;
+		}
+	}
+}
+
+/* SETBRIDGEPORT support, async notifications */
+
+enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
+
+/**
+ * qeth_bridge_emit_host_event() - bridgeport address change notification
+ * @card:  qeth_card structure pointer, for udev events.
+ * @evtype:  "normal" register/unregister, or abort, or reset. For abort
+ *	      and reset token and addr_lnid are unused and may be NULL.
+ * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
+ *			  object, 0 - addition of an object.
+ *			  0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
+ * @token: "network token" structure identifying physical address of the port.
+ * @addr_lnid: pointer to structure with MAC address and VLAN ID.
+ *
+ * This function is called when registrations and deregistrations are
+ * reported by the hardware, and also when notifications are enabled -
+ * for all currently registered addresses.
+ */
+static void qeth_bridge_emit_host_event(struct qeth_card *card,
+					enum qeth_an_event_type evtype,
+					u8 code,
+					struct net_if_token *token,
+					struct mac_addr_lnid *addr_lnid)
+{
+	char str[7][32];
+	char *env[8];
+	int i = 0;
+
+	switch (evtype) {
+	case anev_reg_unreg:
+		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
+				(code & IPA_ADDR_CHANGE_CODE_REMOVAL)
+				? "deregister" : "register");
+		env[i] = str[i]; i++;
+		if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
+			snprintf(str[i], sizeof(str[i]), "VLAN=%d",
+				addr_lnid->lnid);
+			env[i] = str[i]; i++;
+		}
+		if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
+			snprintf(str[i], sizeof(str[i]), "MAC=%pM",
+				addr_lnid->mac);
+			env[i] = str[i]; i++;
+		}
+		snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
+			token->cssid, token->ssid, token->devnum);
+		env[i] = str[i]; i++;
+		snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
+		env[i] = str[i]; i++;
+		snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
+				token->chpid);
+		env[i] = str[i]; i++;
+		snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
+		env[i] = str[i]; i++;
+		break;
+	case anev_abort:
+		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
+		env[i] = str[i]; i++;
+		break;
+	case anev_reset:
+		snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
+		env[i] = str[i]; i++;
+		break;
+	}
+	env[i] = NULL;
+	kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
+}
+
+struct qeth_bridge_state_data {
+	struct work_struct worker;
+	struct qeth_card *card;
+	u8 role;
+	u8 state;
+};
+
+static void qeth_bridge_state_change_worker(struct work_struct *work)
+{
+	struct qeth_bridge_state_data *data =
+		container_of(work, struct qeth_bridge_state_data, worker);
+	char env_locrem[32];
+	char env_role[32];
+	char env_state[32];
+	char *env[] = {
+		env_locrem,
+		env_role,
+		env_state,
+		NULL
+	};
+
+	snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
+	snprintf(env_role, sizeof(env_role), "ROLE=%s",
+		(data->role == QETH_SBP_ROLE_NONE) ? "none" :
+		(data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
+		(data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
+		"<INVALID>");
+	snprintf(env_state, sizeof(env_state), "STATE=%s",
+		(data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
+		(data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
+		(data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
+		"<INVALID>");
+	kobject_uevent_env(&data->card->gdev->dev.kobj,
+				KOBJ_CHANGE, env);
+	kfree(data);
+}
+
+static void qeth_bridge_state_change(struct qeth_card *card,
+					struct qeth_ipa_cmd *cmd)
+{
+	struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
+	struct qeth_bridge_state_data *data;
+
+	QETH_CARD_TEXT(card, 2, "brstchng");
+	if (qports->num_entries == 0) {
+		QETH_CARD_TEXT(card, 2, "BPempty");
+		return;
+	}
+	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
+		QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
+		return;
+	}
+
+	data = kzalloc(sizeof(*data), GFP_ATOMIC);
+	if (!data) {
+		QETH_CARD_TEXT(card, 2, "BPSalloc");
+		return;
+	}
+	INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
+	data->card = card;
+	/* Information for the local port: */
+	data->role = qports->entry[0].role;
+	data->state = qports->entry[0].state;
+
+	queue_work(card->event_wq, &data->worker);
+}
+
+struct qeth_addr_change_data {
+	struct delayed_work dwork;
+	struct qeth_card *card;
+	struct qeth_ipacmd_addr_change ac_event;
+};
+
+static void qeth_l2_dev2br_worker(struct work_struct *work)
+{
+	struct delayed_work *dwork = to_delayed_work(work);
+	struct qeth_addr_change_data *data;
+	struct qeth_card *card;
+	struct qeth_priv *priv;
+	unsigned int i;
+	int rc;
+
+	data = container_of(dwork, struct qeth_addr_change_data, dwork);
+	card = data->card;
+	priv = netdev_priv(card->dev);
+
+	QETH_CARD_TEXT(card, 4, "dev2brew");
+
+	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
+		goto free;
+
+	if (data->ac_event.lost_event_mask) {
+		/* Potential re-config in progress, try again later: */
+		if (!rtnl_trylock()) {
+			queue_delayed_work(card->event_wq, dwork,
+					   msecs_to_jiffies(100));
+			return;
+		}
+
+		if (!netif_device_present(card->dev)) {
+			rtnl_unlock();
+			goto free;
+		}
+
+		QETH_DBF_MESSAGE(3,
+				 "Address change notification overflow on device %x\n",
+				 CARD_DEVID(card));
+		/* Card fdb and bridge fdb are out of sync, card has stopped
+		 * notifications (no need to drain_workqueue). Purge all
+		 * 'extern_learn' entries from the parent bridge and restart
+		 * the notifications.
+		 */
+		qeth_l2_dev2br_fdb_flush(card);
+		rc = qeth_l2_dev2br_an_set(card, true);
+		if (rc) {
+			/* TODO: if we want to retry after -EAGAIN, be
+			 * aware there could be stale entries in the
+			 * workqueue now, that need to be drained.
+			 * For now we give up:
+			 */
+			netdev_err(card->dev,
+				   "bridge learning_sync failed to recover: %d\n",
+				   rc);
+			WRITE_ONCE(card->info.pnso_mode,
+				   QETH_PNSO_NONE);
+			/* To remove fdb entries reported by an_set: */
+			qeth_l2_dev2br_fdb_flush(card);
+			priv->brport_features ^= BR_LEARNING_SYNC;
+		} else {
+			QETH_DBF_MESSAGE(3,
+					 "Address Notification resynced on device %x\n",
+					 CARD_DEVID(card));
+		}
+
+		rtnl_unlock();
+	} else {
+		for (i = 0; i < data->ac_event.num_entries; i++) {
+			struct qeth_ipacmd_addr_change_entry *entry =
+					&data->ac_event.entry[i];
+			qeth_l2_dev2br_fdb_notify(card,
+						  entry->change_code,
+						  &entry->token,
+						  &entry->addr_lnid);
+		}
+	}
+
+free:
+	kfree(data);
+}
+
+static void qeth_addr_change_event_worker(struct work_struct *work)
+{
+	struct delayed_work *dwork = to_delayed_work(work);
+	struct qeth_addr_change_data *data;
+	struct qeth_card *card;
+	int i;
+
+	data = container_of(dwork, struct qeth_addr_change_data, dwork);
+	card = data->card;
+
+	QETH_CARD_TEXT(data->card, 4, "adrchgew");
+
+	if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
+		goto free;
+
+	if (data->ac_event.lost_event_mask) {
+		/* Potential re-config in progress, try again later: */
+		if (!mutex_trylock(&card->sbp_lock)) {
+			queue_delayed_work(card->event_wq, dwork,
+					   msecs_to_jiffies(100));
+			return;
+		}
+
+		dev_info(&data->card->gdev->dev,
+			 "Address change notification stopped on %s (%s)\n",
+			 netdev_name(card->dev),
+			(data->ac_event.lost_event_mask == 0x01)
+			? "Overflow"
+			: (data->ac_event.lost_event_mask == 0x02)
+			? "Bridge port state change"
+			: "Unknown reason");
+
+		data->card->options.sbp.hostnotification = 0;
+		card->info.pnso_mode = QETH_PNSO_NONE;
+		mutex_unlock(&data->card->sbp_lock);
+		qeth_bridge_emit_host_event(data->card, anev_abort,
+					    0, NULL, NULL);
+	} else
+		for (i = 0; i < data->ac_event.num_entries; i++) {
+			struct qeth_ipacmd_addr_change_entry *entry =
+					&data->ac_event.entry[i];
+			qeth_bridge_emit_host_event(data->card,
+						    anev_reg_unreg,
+						    entry->change_code,
+						    &entry->token,
+						    &entry->addr_lnid);
+		}
+
+free:
+	kfree(data);
+}
+
+static void qeth_addr_change_event(struct qeth_card *card,
+				   struct qeth_ipa_cmd *cmd)
+{
+	struct qeth_ipacmd_addr_change *hostevs =
+		 &cmd->data.addrchange;
+	struct qeth_addr_change_data *data;
+	int extrasize;
+
+	if (card->info.pnso_mode == QETH_PNSO_NONE)
+		return;
+
+	QETH_CARD_TEXT(card, 4, "adrchgev");
+	if (cmd->hdr.return_code != 0x0000) {
+		if (cmd->hdr.return_code == 0x0010) {
+			if (hostevs->lost_event_mask == 0x00)
+				hostevs->lost_event_mask = 0xff;
+		} else {
+			QETH_CARD_TEXT_(card, 2, "ACHN%04x",
+				cmd->hdr.return_code);
+			return;
+		}
+	}
+	extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
+						hostevs->num_entries;
+	data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
+		       GFP_ATOMIC);
+	if (!data) {
+		QETH_CARD_TEXT(card, 2, "ACNalloc");
+		return;
+	}
+	if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
+		INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
+	else
+		INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
+	data->card = card;
+	data->ac_event = *hostevs;
+	memcpy(data->ac_event.entry, hostevs->entry, extrasize);
+	queue_delayed_work(card->event_wq, &data->dwork, 0);
+}
+
+/* SETBRIDGEPORT support; sending commands */
+
+struct _qeth_sbp_cbctl {
+	union {
+		u32 supported;
+		struct {
+			enum qeth_sbp_roles *role;
+			enum qeth_sbp_states *state;
+		} qports;
+	} data;
+};
+
+static int qeth_bridgeport_makerc(struct qeth_card *card,
+				  struct qeth_ipa_cmd *cmd)
+{
+	struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
+	enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
+	u16 ipa_rc = cmd->hdr.return_code;
+	u16 sbp_rc = sbp->hdr.return_code;
+	int rc;
+
+	if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
+		return 0;
+
+	if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
+	    (!IS_IQD(card) && ipa_rc == sbp_rc)) {
+		switch (sbp_rc) {
+		case IPA_RC_SUCCESS:
+			rc = 0;
+			break;
+		case IPA_RC_L2_UNSUPPORTED_CMD:
+		case IPA_RC_UNSUPPORTED_COMMAND:
+			rc = -EOPNOTSUPP;
+			break;
+		case IPA_RC_SBP_OSA_NOT_CONFIGURED:
+		case IPA_RC_SBP_IQD_NOT_CONFIGURED:
+			rc = -ENODEV; /* maybe not the best code here? */
+			dev_err(&card->gdev->dev,
+	"The device is not configured as a Bridge Port\n");
+			break;
+		case IPA_RC_SBP_OSA_OS_MISMATCH:
+		case IPA_RC_SBP_IQD_OS_MISMATCH:
+			rc = -EPERM;
+			dev_err(&card->gdev->dev,
+	"A Bridge Port is already configured by a different operating system\n");
+			break;
+		case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
+		case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
+			switch (setcmd) {
+			case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
+				rc = -EEXIST;
+				dev_err(&card->gdev->dev,
+	"The LAN already has a primary Bridge Port\n");
+				break;
+			case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
+				rc = -EBUSY;
+				dev_err(&card->gdev->dev,
+	"The device is already a primary Bridge Port\n");
+				break;
+			default:
+				rc = -EIO;
+			}
+			break;
+		case IPA_RC_SBP_OSA_CURRENT_SECOND:
+		case IPA_RC_SBP_IQD_CURRENT_SECOND:
+			rc = -EBUSY;
+			dev_err(&card->gdev->dev,
+	"The device is already a secondary Bridge Port\n");
+			break;
+		case IPA_RC_SBP_OSA_LIMIT_SECOND:
+		case IPA_RC_SBP_IQD_LIMIT_SECOND:
+			rc = -EEXIST;
+			dev_err(&card->gdev->dev,
+	"The LAN cannot have more secondary Bridge Ports\n");
+			break;
+		case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
+		case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
+			rc = -EBUSY;
+			dev_err(&card->gdev->dev,
+	"The device is already a primary Bridge Port\n");
+			break;
+		case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
+		case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
+			rc = -EACCES;
+			dev_err(&card->gdev->dev,
+	"The device is not authorized to be a Bridge Port\n");
+			break;
+		default:
+			rc = -EIO;
+		}
+	} else {
+		switch (ipa_rc) {
+		case IPA_RC_NOTSUPP:
+			rc = -EOPNOTSUPP;
+			break;
+		case IPA_RC_UNSUPPORTED_COMMAND:
+			rc = -EOPNOTSUPP;
+			break;
+		default:
+			rc = -EIO;
+		}
+	}
+
+	if (rc) {
+		QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
+		QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
+	}
+	return rc;
+}
+
+static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
+						  enum qeth_ipa_sbp_cmd sbp_cmd,
+						  unsigned int data_length)
+{
+	enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
+						    IPA_CMD_SETBRIDGEPORT_OSA;
+	struct qeth_ipacmd_sbp_hdr *hdr;
+	struct qeth_cmd_buffer *iob;
+
+	iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
+				 data_length +
+				 offsetof(struct qeth_ipacmd_setbridgeport,
+					  data));
+	if (!iob)
+		return iob;
+
+	hdr = &__ipa_cmd(iob)->data.sbp.hdr;
+	hdr->cmdlength = sizeof(*hdr) + data_length;
+	hdr->command_code = sbp_cmd;
+	hdr->used_total = 1;
+	hdr->seq_no = 1;
+	return iob;
+}
+
+static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
+	struct qeth_reply *reply, unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
+	int rc;
+
+	QETH_CARD_TEXT(card, 2, "brqsupcb");
+	rc = qeth_bridgeport_makerc(card, cmd);
+	if (rc)
+		return rc;
+
+	cbctl->data.supported =
+		cmd->data.sbp.data.query_cmds_supp.supported_cmds;
+	return 0;
+}
+
+/**
+ * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
+ * @card:			     qeth_card structure pointer.
+ *
+ * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
+ * strucutre: card->options.sbp.supported_funcs.
+ */
+static void qeth_bridgeport_query_support(struct qeth_card *card)
+{
+	struct qeth_cmd_buffer *iob;
+	struct _qeth_sbp_cbctl cbctl;
+
+	QETH_CARD_TEXT(card, 2, "brqsuppo");
+	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
+				 SBP_DATA_SIZEOF(query_cmds_supp));
+	if (!iob)
+		return;
+
+	if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
+			      &cbctl)) {
+		card->options.sbp.role = QETH_SBP_ROLE_NONE;
+		card->options.sbp.supported_funcs = 0;
+		return;
+	}
+	card->options.sbp.supported_funcs = cbctl.data.supported;
+}
+
+static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
+	struct qeth_reply *reply, unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
+	struct qeth_sbp_port_data *qports;
+	int rc;
+
+	QETH_CARD_TEXT(card, 2, "brqprtcb");
+	rc = qeth_bridgeport_makerc(card, cmd);
+	if (rc)
+		return rc;
+
+	qports = &cmd->data.sbp.data.port_data;
+	if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
+		QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
+		return -EINVAL;
+	}
+	/* first entry contains the state of the local port */
+	if (qports->num_entries > 0) {
+		if (cbctl->data.qports.role)
+			*cbctl->data.qports.role = qports->entry[0].role;
+		if (cbctl->data.qports.state)
+			*cbctl->data.qports.state = qports->entry[0].state;
+	}
+	return 0;
+}
+
+/**
+ * qeth_bridgeport_query_ports() - query local bridgeport status.
+ * @card:			   qeth_card structure pointer.
+ * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
+ * @state:  State of the port: 0-inactive, 1-standby, 2-active.
+ *
+ * Returns negative errno-compatible error indication or 0 on success.
+ *
+ * 'role' and 'state' are not updated in case of hardware operation failure.
+ */
+int qeth_bridgeport_query_ports(struct qeth_card *card,
+	enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
+{
+	struct qeth_cmd_buffer *iob;
+	struct _qeth_sbp_cbctl cbctl = {
+		.data = {
+			.qports = {
+				.role = role,
+				.state = state,
+			},
+		},
+	};
+
+	QETH_CARD_TEXT(card, 2, "brqports");
+	if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
+		return -EOPNOTSUPP;
+	iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
+	if (!iob)
+		return -ENOMEM;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
+				 &cbctl);
+}
+
+static int qeth_bridgeport_set_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, 2, "brsetrcb");
+	return qeth_bridgeport_makerc(card, cmd);
+}
+
+/**
+ * qeth_bridgeport_setrole() - Assign primary role to the port.
+ * @card:		       qeth_card structure pointer.
+ * @role:		       Role to assign.
+ *
+ * Returns negative errno-compatible error indication or 0 on success.
+ */
+int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
+{
+	struct qeth_cmd_buffer *iob;
+	enum qeth_ipa_sbp_cmd setcmd;
+	unsigned int cmdlength = 0;
+
+	QETH_CARD_TEXT(card, 2, "brsetrol");
+	switch (role) {
+	case QETH_SBP_ROLE_NONE:
+		setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
+		break;
+	case QETH_SBP_ROLE_PRIMARY:
+		setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
+		cmdlength = SBP_DATA_SIZEOF(set_primary);
+		break;
+	case QETH_SBP_ROLE_SECONDARY:
+		setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
+		break;
+	default:
+		return -EINVAL;
+	}
+	if (!(card->options.sbp.supported_funcs & setcmd))
+		return -EOPNOTSUPP;
+	iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
+	if (!iob)
+		return -ENOMEM;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
+}
+
+static void qeth_bridgeport_an_set_cb(void *priv,
+				      struct chsc_pnso_naid_l2 *entry)
+{
+	struct qeth_card *card = (struct qeth_card *)priv;
+	u8 code;
+
+	code = IPA_ADDR_CHANGE_CODE_MACADDR;
+	if (entry->addr_lnid.lnid < VLAN_N_VID)
+		code |= IPA_ADDR_CHANGE_CODE_VLANID;
+	qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
+				    (struct net_if_token *)&entry->nit,
+				    (struct mac_addr_lnid *)&entry->addr_lnid);
+}
+
+/**
+ * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
+ * @card:		      qeth_card structure pointer.
+ * @enable:		      0 - disable, non-zero - enable notifications
+ *
+ * Returns negative errno-compatible error indication or 0 on success.
+ *
+ * On enable, emits a series of address notifications udev events for all
+ * currently registered hosts.
+ */
+int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
+{
+	int rc;
+
+	if (!card->options.sbp.supported_funcs)
+		return -EOPNOTSUPP;
+
+	if (enable) {
+		qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
+		qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
+				  qeth_bridgeport_an_set_cb, card);
+		if (rc)
+			qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+	} else {
+		rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
+		qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+	}
+	return rc;
+}
+
+/* VNIC Characteristics support */
+
+/* handle VNICC IPA command return codes; convert to error codes */
+static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
+{
+	int rc;
+
+	switch (ipa_rc) {
+	case IPA_RC_SUCCESS:
+		return ipa_rc;
+	case IPA_RC_L2_UNSUPPORTED_CMD:
+	case IPA_RC_NOTSUPP:
+		rc = -EOPNOTSUPP;
+		break;
+	case IPA_RC_VNICC_OOSEQ:
+		rc = -EALREADY;
+		break;
+	case IPA_RC_VNICC_VNICBP:
+		rc = -EBUSY;
+		break;
+	case IPA_RC_L2_ADDR_TABLE_FULL:
+		rc = -ENOSPC;
+		break;
+	case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
+		rc = -EACCES;
+		break;
+	default:
+		rc = -EIO;
+	}
+
+	QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
+	return rc;
+}
+
+/* generic VNICC request call back */
+static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
+				    struct qeth_reply *reply,
+				    unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
+	u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
+
+	QETH_CARD_TEXT(card, 2, "vniccrcb");
+	if (cmd->hdr.return_code)
+		return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
+	/* return results to caller */
+	card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
+	card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
+
+	if (sub_cmd == IPA_VNICC_QUERY_CMDS)
+		*(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
+	else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
+		*(u32 *)reply->param = rep->data.getset_timeout.timeout;
+
+	return 0;
+}
+
+static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
+						       u32 vnicc_cmd,
+						       unsigned int data_length)
+{
+	struct qeth_ipacmd_vnicc_hdr *hdr;
+	struct qeth_cmd_buffer *iob;
+
+	iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
+				 data_length +
+				 offsetof(struct qeth_ipacmd_vnicc, data));
+	if (!iob)
+		return NULL;
+
+	hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
+	hdr->data_length = sizeof(*hdr) + data_length;
+	hdr->sub_command = vnicc_cmd;
+	return iob;
+}
+
+/* VNICC query VNIC characteristics request */
+static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
+{
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT(card, 2, "vniccqch");
+	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
+	if (!iob)
+		return -ENOMEM;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
+}
+
+/* VNICC query sub commands request */
+static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
+				    u32 *sup_cmds)
+{
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT(card, 2, "vniccqcm");
+	iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
+				      VNICC_DATA_SIZEOF(query_cmds));
+	if (!iob)
+		return -ENOMEM;
+
+	__ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
+}
+
+/* VNICC enable/disable characteristic request */
+static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
+				      u32 cmd)
+{
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT(card, 2, "vniccedc");
+	iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
+	if (!iob)
+		return -ENOMEM;
+
+	__ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
+}
+
+/* VNICC get/set timeout for characteristic request */
+static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
+					u32 cmd, u32 *timeout)
+{
+	struct qeth_vnicc_getset_timeout *getset_timeout;
+	struct qeth_cmd_buffer *iob;
+
+	QETH_CARD_TEXT(card, 2, "vniccgst");
+	iob = qeth_l2_vnicc_build_cmd(card, cmd,
+				      VNICC_DATA_SIZEOF(getset_timeout));
+	if (!iob)
+		return -ENOMEM;
+
+	getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
+	getset_timeout->vnic_char = vnicc;
+
+	if (cmd == IPA_VNICC_SET_TIMEOUT)
+		getset_timeout->timeout = *timeout;
+
+	return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
+}
+
+/* recover user timeout setting */
+static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
+					  u32 *timeout)
+{
+	if (card->options.vnicc.sup_chars & vnicc &&
+	    card->options.vnicc.getset_timeout_sup & vnicc &&
+	    !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
+					  timeout))
+		return false;
+	*timeout = QETH_VNICC_DEFAULT_TIMEOUT;
+	return true;
+}
+
+/* set current VNICC flag state; called from sysfs store function */
+int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
+{
+	int rc = 0;
+	u32 cmd;
+
+	QETH_CARD_TEXT(card, 2, "vniccsch");
+
+	/* check if characteristic and enable/disable are supported */
+	if (!(card->options.vnicc.sup_chars & vnicc) ||
+	    !(card->options.vnicc.set_char_sup & vnicc))
+		return -EOPNOTSUPP;
+
+	if (qeth_bridgeport_is_in_use(card))
+		return -EBUSY;
+
+	/* set enable/disable command and store wanted characteristic */
+	if (state) {
+		cmd = IPA_VNICC_ENABLE;
+		card->options.vnicc.wanted_chars |= vnicc;
+	} else {
+		cmd = IPA_VNICC_DISABLE;
+		card->options.vnicc.wanted_chars &= ~vnicc;
+	}
+
+	/* do we need to do anything? */
+	if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
+		return rc;
+
+	/* if card is not ready, simply stop here */
+	if (!qeth_card_hw_is_reachable(card)) {
+		if (state)
+			card->options.vnicc.cur_chars |= vnicc;
+		else
+			card->options.vnicc.cur_chars &= ~vnicc;
+		return rc;
+	}
+
+	rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
+	if (rc)
+		card->options.vnicc.wanted_chars =
+			card->options.vnicc.cur_chars;
+	else {
+		/* successful online VNICC change; handle special cases */
+		if (state && vnicc == QETH_VNICC_RX_BCAST)
+			card->options.vnicc.rx_bcast_enabled = true;
+		if (!state && vnicc == QETH_VNICC_LEARNING)
+			qeth_l2_vnicc_recover_timeout(card, vnicc,
+					&card->options.vnicc.learning_timeout);
+	}
+
+	return rc;
+}
+
+/* get current VNICC flag state; called from sysfs show function */
+int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
+{
+	int rc = 0;
+
+	QETH_CARD_TEXT(card, 2, "vniccgch");
+
+	/* check if characteristic is supported */
+	if (!(card->options.vnicc.sup_chars & vnicc))
+		return -EOPNOTSUPP;
+
+	if (qeth_bridgeport_is_in_use(card))
+		return -EBUSY;
+
+	/* if card is ready, query current VNICC state */
+	if (qeth_card_hw_is_reachable(card))
+		rc = qeth_l2_vnicc_query_chars(card);
+
+	*state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
+	return rc;
+}
+
+/* set VNICC timeout; called from sysfs store function. Currently, only learning
+ * supports timeout
+ */
+int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
+{
+	int rc = 0;
+
+	QETH_CARD_TEXT(card, 2, "vniccsto");
+
+	/* check if characteristic and set_timeout are supported */
+	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
+	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
+		return -EOPNOTSUPP;
+
+	if (qeth_bridgeport_is_in_use(card))
+		return -EBUSY;
+
+	/* do we need to do anything? */
+	if (card->options.vnicc.learning_timeout == timeout)
+		return rc;
+
+	/* if card is not ready, simply store the value internally and return */
+	if (!qeth_card_hw_is_reachable(card)) {
+		card->options.vnicc.learning_timeout = timeout;
+		return rc;
+	}
+
+	/* send timeout value to card; if successful, store value internally */
+	rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
+					  IPA_VNICC_SET_TIMEOUT, &timeout);
+	if (!rc)
+		card->options.vnicc.learning_timeout = timeout;
+
+	return rc;
+}
+
+/* get current VNICC timeout; called from sysfs show function. Currently, only
+ * learning supports timeout
+ */
+int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
+{
+	int rc = 0;
+
+	QETH_CARD_TEXT(card, 2, "vniccgto");
+
+	/* check if characteristic and get_timeout are supported */
+	if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
+	    !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
+		return -EOPNOTSUPP;
+
+	if (qeth_bridgeport_is_in_use(card))
+		return -EBUSY;
+
+	/* if card is ready, get timeout. Otherwise, just return stored value */
+	*timeout = card->options.vnicc.learning_timeout;
+	if (qeth_card_hw_is_reachable(card))
+		rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
+						  IPA_VNICC_GET_TIMEOUT,
+						  timeout);
+
+	return rc;
+}
+
+/* check if VNICC is currently enabled */
+static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
+{
+	if (!card->options.vnicc.sup_chars)
+		return false;
+	/* default values are only OK if rx_bcast was not enabled by user
+	 * or the card is offline.
+	 */
+	if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
+		if (!card->options.vnicc.rx_bcast_enabled ||
+		    !qeth_card_hw_is_reachable(card))
+			return false;
+	}
+	return true;
+}
+
+/**
+ *	qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
+ *	@card: qeth_card structure pointer
+ *
+ *	qeth_bridgeport functionality is mutually exclusive with usage of the
+ *	VNIC Characteristics and dev2br address notifications
+ */
+bool qeth_bridgeport_allowed(struct qeth_card *card)
+{
+	struct qeth_priv *priv = netdev_priv(card->dev);
+
+	return (!_qeth_l2_vnicc_is_in_use(card) &&
+		!(priv->brport_features & BR_LEARNING_SYNC));
+}
+
+/* recover user characteristic setting */
+static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
+				       bool enable)
+{
+	u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
+
+	if (card->options.vnicc.sup_chars & vnicc &&
+	    card->options.vnicc.set_char_sup & vnicc &&
+	    !qeth_l2_vnicc_set_char(card, vnicc, cmd))
+		return false;
+	card->options.vnicc.wanted_chars &= ~vnicc;
+	card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
+	return true;
+}
+
+/* (re-)initialize VNICC */
+static void qeth_l2_vnicc_init(struct qeth_card *card)
+{
+	u32 *timeout = &card->options.vnicc.learning_timeout;
+	bool enable, error = false;
+	unsigned int chars_len, i;
+	unsigned long chars_tmp;
+	u32 sup_cmds, vnicc;
+
+	QETH_CARD_TEXT(card, 2, "vniccini");
+	/* reset rx_bcast */
+	card->options.vnicc.rx_bcast_enabled = 0;
+	/* initial query and storage of VNIC characteristics */
+	if (qeth_l2_vnicc_query_chars(card)) {
+		if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
+		    *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
+			dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
+		/* fail quietly if user didn't change the default config */
+		card->options.vnicc.sup_chars = 0;
+		card->options.vnicc.cur_chars = 0;
+		card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
+		return;
+	}
+	/* get supported commands for each supported characteristic */
+	chars_tmp = card->options.vnicc.sup_chars;
+	chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
+	for_each_set_bit(i, &chars_tmp, chars_len) {
+		vnicc = BIT(i);
+		if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
+			sup_cmds = 0;
+			error = true;
+		}
+		if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
+		    (sup_cmds & IPA_VNICC_GET_TIMEOUT))
+			card->options.vnicc.getset_timeout_sup |= vnicc;
+		else
+			card->options.vnicc.getset_timeout_sup &= ~vnicc;
+		if ((sup_cmds & IPA_VNICC_ENABLE) &&
+		    (sup_cmds & IPA_VNICC_DISABLE))
+			card->options.vnicc.set_char_sup |= vnicc;
+		else
+			card->options.vnicc.set_char_sup &= ~vnicc;
+	}
+	/* enforce assumed default values and recover settings, if changed  */
+	error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
+					       timeout);
+	/* Change chars, if necessary  */
+	chars_tmp = card->options.vnicc.wanted_chars ^
+		    card->options.vnicc.cur_chars;
+	chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
+	for_each_set_bit(i, &chars_tmp, chars_len) {
+		vnicc = BIT(i);
+		enable = card->options.vnicc.wanted_chars & vnicc;
+		error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
+	}
+	if (error)
+		dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
+}
+
+/* configure default values of VNIC characteristics */
+static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
+{
+	/* characteristics values */
+	card->options.vnicc.sup_chars = QETH_VNICC_ALL;
+	card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
+	card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
+	/* supported commands */
+	card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
+	card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
+	/* settings wanted by users */
+	card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
+}
+
+static const struct device_type qeth_l2_devtype = {
+	.name = "qeth_layer2",
+	.groups = qeth_l2_attr_groups,
+};
+
+static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
+{
+	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+	int rc;
+
+	qeth_l2_vnicc_set_defaults(card);
+	mutex_init(&card->sbp_lock);
+
+	if (gdev->dev.type) {
+		rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
+		if (rc)
+			return rc;
+	} else {
+		gdev->dev.type = &qeth_l2_devtype;
+	}
+
+	INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
+	return 0;
+}
+
+static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
+{
+	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
+	struct qeth_priv *priv;
+
+	if (gdev->dev.type != &qeth_l2_devtype)
+		device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
+
+	qeth_set_allowed_threads(card, 0, 1);
+	wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
+
+	if (gdev->state == CCWGROUP_ONLINE)
+		qeth_set_offline(card, card->discipline, false);
+
+	if (card->dev->reg_state == NETREG_REGISTERED) {
+		priv = netdev_priv(card->dev);
+		if (priv->brport_features & BR_LEARNING_SYNC) {
+			rtnl_lock();
+			qeth_l2_br2dev_put();
+			rtnl_unlock();
+		}
+		unregister_netdev(card->dev);
+	}
+}
+
+static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
+{
+	struct net_device *dev = card->dev;
+	int rc = 0;
+
+	qeth_l2_detect_dev2br_support(card);
+
+	mutex_lock(&card->sbp_lock);
+	qeth_bridgeport_query_support(card);
+	if (card->options.sbp.supported_funcs) {
+		qeth_l2_setup_bridgeport_attrs(card);
+		dev_info(&card->gdev->dev,
+			 "The device represents a Bridge Capable Port\n");
+	}
+	mutex_unlock(&card->sbp_lock);
+
+	qeth_l2_register_dev_addr(card);
+
+	/* for the rx_bcast characteristic, init VNICC after setmac */
+	qeth_l2_vnicc_init(card);
+
+	qeth_l2_trace_features(card);
+
+	/* softsetup */
+	QETH_CARD_TEXT(card, 2, "softsetp");
+
+	card->state = CARD_STATE_SOFTSETUP;
+
+	qeth_set_allowed_threads(card, 0xffffffff, 0);
+
+	if (dev->reg_state != NETREG_REGISTERED) {
+		rc = qeth_l2_setup_netdev(card);
+		if (rc)
+			goto err_setup;
+
+		if (carrier_ok)
+			netif_carrier_on(dev);
+	} else {
+		rtnl_lock();
+		rc = qeth_set_real_num_tx_queues(card,
+						 qeth_tx_actual_queues(card));
+		if (rc) {
+			rtnl_unlock();
+			goto err_set_queues;
+		}
+
+		if (carrier_ok)
+			netif_carrier_on(dev);
+		else
+			netif_carrier_off(dev);
+
+		netif_device_attach(dev);
+		qeth_enable_hw_features(dev);
+		qeth_l2_enable_brport_features(card);
+
+		if (netif_running(dev)) {
+			local_bh_disable();
+			napi_schedule(&card->napi);
+			/* kick-start the NAPI softirq: */
+			local_bh_enable();
+			qeth_l2_set_rx_mode(dev);
+		}
+		rtnl_unlock();
+	}
+	return 0;
+
+err_set_queues:
+err_setup:
+	qeth_set_allowed_threads(card, 0, 1);
+	card->state = CARD_STATE_DOWN;
+	return rc;
+}
+
+static void qeth_l2_set_offline(struct qeth_card *card)
+{
+	struct qeth_priv *priv = netdev_priv(card->dev);
+
+	qeth_set_allowed_threads(card, 0, 1);
+	qeth_l2_drain_rx_mode_cache(card);
+
+	if (card->state == CARD_STATE_SOFTSETUP)
+		card->state = CARD_STATE_DOWN;
+
+	qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
+	if (priv->brport_features & BR_LEARNING_SYNC)
+		qeth_l2_dev2br_fdb_flush(card);
+}
+
+/* Returns zero if the command is successfully "consumed" */
+static int qeth_l2_control_event(struct qeth_card *card,
+				 struct qeth_ipa_cmd *cmd)
+{
+	switch (cmd->hdr.command) {
+	case IPA_CMD_SETBRIDGEPORT_OSA:
+	case IPA_CMD_SETBRIDGEPORT_IQD:
+		if (cmd->data.sbp.hdr.command_code ==
+		    IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
+			qeth_bridge_state_change(card, cmd);
+			return 0;
+		}
+
+		return 1;
+	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
+		qeth_addr_change_event(card, cmd);
+		return 0;
+	default:
+		return 1;
+	}
+}
+
+const struct qeth_discipline qeth_l2_discipline = {
+	.setup = qeth_l2_probe_device,
+	.remove = qeth_l2_remove_device,
+	.set_online = qeth_l2_set_online,
+	.set_offline = qeth_l2_set_offline,
+	.control_event_handler = qeth_l2_control_event,
+};
+EXPORT_SYMBOL_GPL(qeth_l2_discipline);
+
+static int __init qeth_l2_init(void)
+{
+	pr_info("register layer 2 discipline\n");
+	refcount_set(&qeth_l2_switchdev_notify_refcnt, 0);
+	return 0;
+}
+
+static void __exit qeth_l2_exit(void)
+{
+	pr_info("unregister layer 2 discipline\n");
+}
+
+module_init(qeth_l2_init);
+module_exit(qeth_l2_exit);
+MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
+MODULE_DESCRIPTION("qeth layer 2 discipline");
+MODULE_LICENSE("GPL");