Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Add VF IPSEC offload support in ixgbe, from Shannon Nelson.

 2) Add zero-copy AF_XDP support to i40e, from Björn Töpel.

 3) All in-tree drivers are converted to {g,s}et_link_ksettings() so we
    can get rid of the {g,s}et_settings ethtool callbacks, from Michal
    Kubecek.

 4) Add software timestamping to veth driver, from Michael Walle.

 5) More work to make packet classifiers and actions lockless, from Vlad
    Buslov.

 6) Support sticky FDB entries in bridge, from Nikolay Aleksandrov.

 7) Add ipv6 version of IP_MULTICAST_ALL sockopt, from Andre Naujoks.

 8) Support batching of XDP buffers in vhost_net, from Jason Wang.

 9) Add flow dissector BPF hook, from Petar Penkov.

10) i40e vf --> generic iavf conversion, from Jesse Brandeburg.

11) Add NLA_REJECT netlink attribute policy type, to signal when users
    provide attributes in situations which don't make sense. From
    Johannes Berg.

12) Switch TCP and fair-queue scheduler over to earliest departure time
    model. From Eric Dumazet.

13) Improve guest receive performance by doing rx busy polling in tx
    path of vhost networking driver, from Tonghao Zhang.

14) Add per-cgroup local storage to bpf

15) Add reference tracking to BPF, from Joe Stringer. The verifier can
    now make sure that references taken to objects are properly released
    by the program.

16) Support in-place encryption in TLS, from Vakul Garg.

17) Add new taprio packet scheduler, from Vinicius Costa Gomes.

18) Lots of selftests additions, too numerous to mention one by one here
    but all of which are very much appreciated.

19) Support offloading of eBPF programs containing BPF to BPF calls in
    nfp driver, frm Quentin Monnet.

20) Move dpaa2_ptp driver out of staging, from Yangbo Lu.

21) Lots of u32 classifier cleanups and simplifications, from Al Viro.

22) Add new strict versions of netlink message parsers, and enable them
    for some situations. From David Ahern.

23) Evict neighbour entries on carrier down, also from David Ahern.

24) Support BPF sk_msg verdict programs with kTLS, from Daniel Borkmann
    and John Fastabend.

25) Add support for filtering route dumps, from David Ahern.

26) New igc Intel driver for 2.5G parts, from Sasha Neftin et al.

27) Allow vxlan enslavement to bridges in mlxsw driver, from Ido
    Schimmel.

28) Add queue and stack map types to eBPF, from Mauricio Vasquez B.

29) Add back byte-queue-limit support to r8169, with all the bug fixes
    in other areas of the driver it works now! From Florian Westphal and
    Heiner Kallweit.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2147 commits)
  tcp: add tcp_reset_xmit_timer() helper
  qed: Fix static checker warning
  Revert "be2net: remove desc field from be_eq_obj"
  Revert "net: simplify sock_poll_wait"
  net: socionext: Reset tx queue in ndo_stop
  net: socionext: Add dummy PHY register read in phy_write()
  net: socionext: Stop PHY before resetting netsec
  net: stmmac: Set OWN bit for jumbo frames
  arm64: dts: stratix10: Support Ethernet Jumbo frame
  tls: Add maintainers
  net: ethernet: ti: cpsw: unsync mcast entries while switch promisc mode
  octeontx2-af: Support for NIXLF's UCAST/PROMISC/ALLMULTI modes
  octeontx2-af: Support for setting MAC address
  octeontx2-af: Support for changing RSS algorithm
  octeontx2-af: NIX Rx flowkey configuration for RSS
  octeontx2-af: Install ucast and bcast pkt forwarding rules
  octeontx2-af: Add LMAC channel info to NIXLF_ALLOC response
  octeontx2-af: NPC MCAM and LDATA extract minimal configuration
  octeontx2-af: Enable packet length and csum validation
  octeontx2-af: Support for VTAG strip and capture
  ...

6 files changed, 694 insertions, 734 deletions

diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 34e0d476c5c6..6843bc7ee9f2 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -26,6 +26,7 @@
 #include <net/ipv6.h>
 #include <net/if_inet6.h>
 #include <net/addrconf.h>
+#include <net/tcp.h>
 
 #include <asm/debug.h>
 #include <asm/qdio.h>
@@ -389,8 +390,9 @@ enum qeth_layer2_frame_flags {
 enum qeth_header_ids {
 	QETH_HEADER_TYPE_LAYER3 = 0x01,
 	QETH_HEADER_TYPE_LAYER2 = 0x02,
-	QETH_HEADER_TYPE_TSO	= 0x03,
+	QETH_HEADER_TYPE_L3_TSO	= 0x03,
 	QETH_HEADER_TYPE_OSN    = 0x04,
+	QETH_HEADER_TYPE_L2_TSO	= 0x06,
 };
 /* flags for qeth_hdr.ext_flags */
 #define QETH_HDR_EXT_VLAN_FRAME       0x01
@@ -581,7 +583,8 @@ struct qeth_cmd_buffer {
 	struct qeth_channel *channel;
 	unsigned char *data;
 	int rc;
-	void (*callback) (struct qeth_channel *, struct qeth_cmd_buffer *);
+	void (*callback)(struct qeth_card *card, struct qeth_channel *channel,
+			 struct qeth_cmd_buffer *iob);
 };
 
 static inline struct qeth_ipa_cmd *__ipa_cmd(struct qeth_cmd_buffer *iob)
@@ -638,7 +641,6 @@ struct qeth_reply {
 	atomic_t received;
 	int rc;
 	void *param;
-	struct qeth_card *card;
 	refcount_t refcnt;
 };
 
@@ -671,6 +673,12 @@ struct qeth_card_info {
 	__u32 hwtrap;
 };
 
+enum qeth_discipline_id {
+	QETH_DISCIPLINE_UNDETERMINED = -1,
+	QETH_DISCIPLINE_LAYER3 = 0,
+	QETH_DISCIPLINE_LAYER2 = 1,
+};
+
 struct qeth_card_options {
 	struct qeth_routing_info route4;
 	struct qeth_ipa_info ipa4;
@@ -680,7 +688,7 @@ struct qeth_card_options {
 	struct qeth_sbp_info sbp; /* SETBRIDGEPORT options */
 	struct qeth_vnicc_info vnicc; /* VNICC options */
 	int fake_broadcast;
-	int layer2;
+	enum qeth_discipline_id layer;
 	int performance_stats;
 	int rx_sg_cb;
 	enum qeth_ipa_isolation_modes isolation;
@@ -690,6 +698,9 @@ struct qeth_card_options {
 	char hsuid[9];
 };
 
+#define	IS_LAYER2(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER2)
+#define	IS_LAYER3(card)	((card)->options.layer == QETH_DISCIPLINE_LAYER3)
+
 /*
  * thread bits for qeth_card thread masks
  */
@@ -702,12 +713,6 @@ struct qeth_osn_info {
 	int (*data_cb)(struct sk_buff *skb);
 };
 
-enum qeth_discipline_id {
-	QETH_DISCIPLINE_UNDETERMINED = -1,
-	QETH_DISCIPLINE_LAYER3 = 0,
-	QETH_DISCIPLINE_LAYER2 = 1,
-};
-
 struct qeth_discipline {
 	const struct device_type *devtype;
 	int (*process_rx_buffer)(struct qeth_card *card, int budget, int *done);
@@ -759,7 +764,6 @@ struct qeth_switch_info {
 struct qeth_card {
 	struct list_head list;
 	enum qeth_card_states state;
-	int lan_online;
 	spinlock_t lock;
 	struct ccwgroup_device *gdev;
 	struct qeth_channel read;
@@ -892,11 +896,6 @@ static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, int ipv)
 	if ((ipv == 4 && ip_hdr(skb)->protocol == IPPROTO_UDP) ||
 	    (ipv == 6 && ipv6_hdr(skb)->nexthdr == IPPROTO_UDP))
 		*flags |= QETH_HDR_EXT_UDP;
-	if (ipv == 4) {
-		/* some HW requires combined L3+L4 csum offload: */
-		*flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
-		ip_hdr(skb)->check = 0;
-	}
 }
 
 static inline void qeth_put_buffer_pool_entry(struct qeth_card *card,
@@ -1007,9 +1006,7 @@ int qeth_query_switch_attributes(struct qeth_card *card,
 int qeth_send_control_data(struct qeth_card *, int, struct qeth_cmd_buffer *,
 	int (*reply_cb)(struct qeth_card *, struct qeth_reply*, unsigned long),
 	void *reply_param);
-int qeth_get_elements_no(struct qeth_card *card, struct sk_buff *skb,
-			 int extra_elems, int data_offset);
-int qeth_get_elements_for_frags(struct sk_buff *);
+unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset);
 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
 			     struct qeth_hdr *hdr, unsigned int offset,
 			     unsigned int hd_len);
@@ -1027,7 +1024,6 @@ void qeth_dbf_longtext(debug_info_t *id, int level, char *text, ...);
 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
 					 struct ethtool_link_ksettings *cmd);
 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback);
-int qeth_hdr_chk_and_bounce(struct sk_buff *, struct qeth_hdr **, int);
 int qeth_configure_cq(struct qeth_card *, enum qeth_cq);
 int qeth_hw_trap(struct qeth_card *, enum qeth_diags_trap_action);
 void qeth_trace_features(struct qeth_card *);
@@ -1052,6 +1048,13 @@ int qeth_vm_request_mac(struct qeth_card *card);
 int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
 		       struct qeth_hdr **hdr, unsigned int hdr_len,
 		       unsigned int proto_len, unsigned int *elements);
+void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, unsigned int payload_len,
+		       struct sk_buff *skb, unsigned int proto_len);
+int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
+	      struct qeth_qdio_out_q *queue, int ipv, int cast_type,
+	      void (*fill_header)(struct qeth_card *card, struct qeth_hdr *hdr,
+				  struct sk_buff *skb, int ipv, int cast_type,
+				  unsigned int data_len));
 
 /* exports for OSN */
 int qeth_osn_assist(struct net_device *, void *, int);
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index ffce6f39828a..3274f13aad57 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -16,6 +16,7 @@
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
+#include <linux/log2.h>
 #include <linux/ip.h>
 #include <linux/tcp.h>
 #include <linux/mii.h>
@@ -61,10 +62,10 @@ static struct kmem_cache *qeth_qdio_outbuf_cache;
 
 static struct device *qeth_core_root_dev;
 static struct lock_class_key qdio_out_skb_queue_key;
-static struct mutex qeth_mod_mutex;
 
-static void qeth_send_control_data_cb(struct qeth_channel *,
-			struct qeth_cmd_buffer *);
+static void qeth_send_control_data_cb(struct qeth_card *card,
+				      struct qeth_channel *channel,
+				      struct qeth_cmd_buffer *iob);
 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
 static void qeth_free_buffer_pool(struct qeth_card *);
 static int qeth_qdio_establish(struct qeth_card *);
@@ -591,7 +592,6 @@ static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 	if (reply) {
 		refcount_set(&reply->refcnt, 1);
 		atomic_set(&reply->received, 0);
-		reply->card = card;
 	}
 	return reply;
 }
@@ -626,80 +626,61 @@ static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 }
 
 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
-		struct qeth_cmd_buffer *iob)
+						struct qeth_ipa_cmd *cmd)
 {
-	struct qeth_ipa_cmd *cmd = NULL;
-
 	QETH_CARD_TEXT(card, 5, "chkipad");
-	if (IS_IPA(iob->data)) {
-		cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
-		if (IS_IPA_REPLY(cmd)) {
-			if (cmd->hdr.command != IPA_CMD_SETCCID &&
-			    cmd->hdr.command != IPA_CMD_DELCCID &&
-			    cmd->hdr.command != IPA_CMD_MODCCID &&
-			    cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
-				qeth_issue_ipa_msg(cmd,
-						cmd->hdr.return_code, card);
-			return cmd;
+
+	if (IS_IPA_REPLY(cmd)) {
+		if (cmd->hdr.command != IPA_CMD_SETCCID &&
+		    cmd->hdr.command != IPA_CMD_DELCCID &&
+		    cmd->hdr.command != IPA_CMD_MODCCID &&
+		    cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
+			qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
+		return cmd;
+	}
+
+	/* handle unsolicited event: */
+	switch (cmd->hdr.command) {
+	case IPA_CMD_STOPLAN:
+		if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
+			dev_err(&card->gdev->dev,
+				"Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
+				QETH_CARD_IFNAME(card));
+			qeth_close_dev(card);
 		} else {
-			switch (cmd->hdr.command) {
-			case IPA_CMD_STOPLAN:
-				if (cmd->hdr.return_code ==
-						IPA_RC_VEPA_TO_VEB_TRANSITION) {
-					dev_err(&card->gdev->dev,
-					   "Interface %s is down because the "
-					   "adjacent port is no longer in "
-					   "reflective relay mode\n",
-					   QETH_CARD_IFNAME(card));
-					qeth_close_dev(card);
-				} else {
-					dev_warn(&card->gdev->dev,
-					   "The link for interface %s on CHPID"
-					   " 0x%X failed\n",
-					   QETH_CARD_IFNAME(card),
-					   card->info.chpid);
-					qeth_issue_ipa_msg(cmd,
-						cmd->hdr.return_code, card);
-				}
-				card->lan_online = 0;
-				netif_carrier_off(card->dev);
-				return NULL;
-			case IPA_CMD_STARTLAN:
-				dev_info(&card->gdev->dev,
-					   "The link for %s on CHPID 0x%X has"
-					   " been restored\n",
-					   QETH_CARD_IFNAME(card),
-					   card->info.chpid);
-				netif_carrier_on(card->dev);
-				card->lan_online = 1;
-				if (card->info.hwtrap)
-					card->info.hwtrap = 2;
-				qeth_schedule_recovery(card);
-				return NULL;
-			case IPA_CMD_SETBRIDGEPORT_IQD:
-			case IPA_CMD_SETBRIDGEPORT_OSA:
-			case IPA_CMD_ADDRESS_CHANGE_NOTIF:
-				if (card->discipline->control_event_handler
-								(card, cmd))
-					return cmd;
-				else
-					return NULL;
-			case IPA_CMD_MODCCID:
-				return cmd;
-			case IPA_CMD_REGISTER_LOCAL_ADDR:
-				QETH_CARD_TEXT(card, 3, "irla");
-				break;
-			case IPA_CMD_UNREGISTER_LOCAL_ADDR:
-				QETH_CARD_TEXT(card, 3, "urla");
-				break;
-			default:
-				QETH_DBF_MESSAGE(2, "Received data is IPA "
-					   "but not a reply!\n");
-				break;
-			}
+			dev_warn(&card->gdev->dev,
+				 "The link for interface %s on CHPID 0x%X failed\n",
+				 QETH_CARD_IFNAME(card), card->info.chpid);
+			qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
+			netif_carrier_off(card->dev);
 		}
+		return NULL;
+	case IPA_CMD_STARTLAN:
+		dev_info(&card->gdev->dev,
+			 "The link for %s on CHPID 0x%X has been restored\n",
+			 QETH_CARD_IFNAME(card), card->info.chpid);
+		if (card->info.hwtrap)
+			card->info.hwtrap = 2;
+		qeth_schedule_recovery(card);
+		return NULL;
+	case IPA_CMD_SETBRIDGEPORT_IQD:
+	case IPA_CMD_SETBRIDGEPORT_OSA:
+	case IPA_CMD_ADDRESS_CHANGE_NOTIF:
+		if (card->discipline->control_event_handler(card, cmd))
+			return cmd;
+		return NULL;
+	case IPA_CMD_MODCCID:
+		return cmd;
+	case IPA_CMD_REGISTER_LOCAL_ADDR:
+		QETH_CARD_TEXT(card, 3, "irla");
+		return NULL;
+	case IPA_CMD_UNREGISTER_LOCAL_ADDR:
+		QETH_CARD_TEXT(card, 3, "urla");
+		return NULL;
+	default:
+		QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
+		return cmd;
 	}
-	return cmd;
 }
 
 void qeth_clear_ipacmd_list(struct qeth_card *card)
@@ -746,18 +727,10 @@ static int qeth_check_idx_response(struct qeth_card *card,
 	return 0;
 }
 
-static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
-{
-	struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
-		dev_get_drvdata(&cdev->dev))->dev);
-	return card;
-}
-
 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 {
 	__u8 index;
 
-	QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 	index = channel->io_buf_no;
 	do {
 		if (channel->iob[index].state == BUF_STATE_FREE) {
@@ -778,9 +751,7 @@ void qeth_release_buffer(struct qeth_channel *channel,
 {
 	unsigned long flags;
 
-	QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 	spin_lock_irqsave(&channel->iob_lock, flags);
-	memset(iob->data, 0, QETH_BUFSIZE);
 	iob->state = BUF_STATE_FREE;
 	iob->callback = qeth_send_control_data_cb;
 	iob->rc = 0;
@@ -789,6 +760,13 @@ void qeth_release_buffer(struct qeth_channel *channel,
 }
 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 
+static void qeth_release_buffer_cb(struct qeth_card *card,
+				   struct qeth_channel *channel,
+				   struct qeth_cmd_buffer *iob)
+{
+	qeth_release_buffer(channel, iob);
+}
+
 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 {
 	struct qeth_cmd_buffer *buffer = NULL;
@@ -819,17 +797,16 @@ void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 }
 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 
-static void qeth_send_control_data_cb(struct qeth_channel *channel,
-		  struct qeth_cmd_buffer *iob)
+static void qeth_send_control_data_cb(struct qeth_card *card,
+				      struct qeth_channel *channel,
+				      struct qeth_cmd_buffer *iob)
 {
-	struct qeth_card *card;
+	struct qeth_ipa_cmd *cmd = NULL;
 	struct qeth_reply *reply, *r;
-	struct qeth_ipa_cmd *cmd;
 	unsigned long flags;
 	int keep_reply;
 	int rc = 0;
 
-	card = CARD_FROM_CDEV(channel->ccwdev);
 	QETH_CARD_TEXT(card, 4, "sndctlcb");
 	rc = qeth_check_idx_response(card, iob->data);
 	switch (rc) {
@@ -843,16 +820,20 @@ static void qeth_send_control_data_cb(struct qeth_channel *channel,
 		goto out;
 	}
 
-	cmd = qeth_check_ipa_data(card, iob);
-	if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
-		goto out;
-	/*in case of OSN : check if cmd is set */
-	if (card->info.type == QETH_CARD_TYPE_OSN &&
-	    cmd &&
-	    cmd->hdr.command != IPA_CMD_STARTLAN &&
-	    card->osn_info.assist_cb != NULL) {
-		card->osn_info.assist_cb(card->dev, cmd);
-		goto out;
+	if (IS_IPA(iob->data)) {
+		cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
+		cmd = qeth_check_ipa_data(card, cmd);
+		if (!cmd)
+			goto out;
+		if (IS_OSN(card) && card->osn_info.assist_cb &&
+		    cmd->hdr.command != IPA_CMD_STARTLAN) {
+			card->osn_info.assist_cb(card->dev, cmd);
+			goto out;
+		}
+	} else {
+		/* non-IPA commands should only flow during initialization */
+		if (card->state != CARD_STATE_DOWN)
+			goto out;
 	}
 
 	spin_lock_irqsave(&card->lock, flags);
@@ -900,44 +881,6 @@ out:
 	qeth_release_buffer(channel, iob);
 }
 
-static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
-{
-	int cnt;
-
-	QETH_DBF_TEXT(SETUP, 2, "setupch");
-
-	channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
-	if (!channel->ccw)
-		return -ENOMEM;
-	channel->state = CH_STATE_DOWN;
-	atomic_set(&channel->irq_pending, 0);
-	init_waitqueue_head(&channel->wait_q);
-
-	if (!alloc_buffers)
-		return 0;
-
-	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
-		channel->iob[cnt].data =
-			kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
-		if (channel->iob[cnt].data == NULL)
-			break;
-		channel->iob[cnt].state = BUF_STATE_FREE;
-		channel->iob[cnt].channel = channel;
-		channel->iob[cnt].callback = qeth_send_control_data_cb;
-		channel->iob[cnt].rc = 0;
-	}
-	if (cnt < QETH_CMD_BUFFER_NO) {
-		kfree(channel->ccw);
-		while (cnt-- > 0)
-			kfree(channel->iob[cnt].data);
-		return -ENOMEM;
-	}
-	channel->io_buf_no = 0;
-	spin_lock_init(&channel->iob_lock);
-
-	return 0;
-}
-
 static int qeth_set_thread_start_bit(struct qeth_card *card,
 		unsigned long thread)
 {
@@ -1013,16 +956,15 @@ void qeth_schedule_recovery(struct qeth_card *card)
 }
 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 
-static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
+static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
+			    struct irb *irb)
 {
 	int dstat, cstat;
 	char *sense;
-	struct qeth_card *card;
 
 	sense = (char *) irb->ecw;
 	cstat = irb->scsw.cmd.cstat;
 	dstat = irb->scsw.cmd.dstat;
-	card = CARD_FROM_CDEV(cdev);
 
 	if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 		     SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
@@ -1062,14 +1004,11 @@ static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
 	return 0;
 }
 
-static long __qeth_check_irb_error(struct ccw_device *cdev,
-		unsigned long intparm, struct irb *irb)
+static long qeth_check_irb_error(struct qeth_card *card,
+				 struct ccw_device *cdev, unsigned long intparm,
+				 struct irb *irb)
 {
-	struct qeth_card *card;
-
-	card = CARD_FROM_CDEV(cdev);
-
-	if (!card || !IS_ERR(irb))
+	if (!IS_ERR(irb))
 		return 0;
 
 	switch (PTR_ERR(irb)) {
@@ -1106,10 +1045,13 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 	int rc;
 	int cstat, dstat;
 	struct qeth_cmd_buffer *iob = NULL;
+	struct ccwgroup_device *gdev;
 	struct qeth_channel *channel;
 	struct qeth_card *card;
 
-	card = CARD_FROM_CDEV(cdev);
+	/* while we hold the ccwdev lock, this stays valid: */
+	gdev = dev_get_drvdata(&cdev->dev);
+	card = dev_get_drvdata(&gdev->dev);
 	if (!card)
 		return;
 
@@ -1129,7 +1071,7 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 	if (qeth_intparm_is_iob(intparm))
 		iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
 
-	if (__qeth_check_irb_error(cdev, intparm, irb)) {
+	if (qeth_check_irb_error(card, cdev, intparm, irb)) {
 		/* IO was terminated, free its resources. */
 		if (iob)
 			qeth_release_buffer(iob->channel, iob);
@@ -1184,7 +1126,7 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 			channel->state = CH_STATE_DOWN;
 			goto out;
 		}
-		rc = qeth_get_problem(cdev, irb);
+		rc = qeth_get_problem(card, cdev, irb);
 		if (rc) {
 			card->read_or_write_problem = 1;
 			qeth_clear_ipacmd_list(card);
@@ -1204,7 +1146,7 @@ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 		__qeth_issue_next_read(card);
 
 	if (iob && iob->callback)
-		iob->callback(iob->channel, iob);
+		iob->callback(card, iob->channel, iob);
 
 out:
 	wake_up(&card->wait_q);
@@ -1217,54 +1159,23 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
 {
 	struct sk_buff *skb;
 
-	if (skb_queue_empty(&buf->skb_list))
-		goto out;
-	skb = skb_peek(&buf->skb_list);
-	while (skb) {
+	skb_queue_walk(&buf->skb_list, skb) {
 		QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
 		QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
-		if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
-			if (skb->sk) {
-				struct iucv_sock *iucv = iucv_sk(skb->sk);
-				iucv->sk_txnotify(skb, notification);
-			}
-		}
-		if (skb_queue_is_last(&buf->skb_list, skb))
-			skb = NULL;
-		else
-			skb = skb_queue_next(&buf->skb_list, skb);
+		if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
+			iucv_sk(skb->sk)->sk_txnotify(skb, notification);
 	}
-out:
-	return;
 }
 
 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
 {
-	struct sk_buff *skb;
-	struct iucv_sock *iucv;
-	int notify_general_error = 0;
-
-	if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
-		notify_general_error = 1;
-
 	/* release may never happen from within CQ tasklet scope */
 	WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
 
-	skb = skb_dequeue(&buf->skb_list);
-	while (skb) {
-		QETH_CARD_TEXT(buf->q->card, 5, "skbr");
-		QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
-		if (notify_general_error &&
-		    be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
-			if (skb->sk) {
-				iucv = iucv_sk(skb->sk);
-				iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
-			}
-		}
-		refcount_dec(&skb->users);
-		dev_kfree_skb_any(skb);
-		skb = skb_dequeue(&buf->skb_list);
-	}
+	if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
+		qeth_notify_skbs(buf->q, buf, TX_NOTIFY_GENERALERROR);
+
+	__skb_queue_purge(&buf->skb_list);
 }
 
 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
@@ -1336,14 +1247,61 @@ static void qeth_free_buffer_pool(struct qeth_card *card)
 
 static void qeth_clean_channel(struct qeth_channel *channel)
 {
+	struct ccw_device *cdev = channel->ccwdev;
 	int cnt;
 
 	QETH_DBF_TEXT(SETUP, 2, "freech");
+
+	spin_lock_irq(get_ccwdev_lock(cdev));
+	cdev->handler = NULL;
+	spin_unlock_irq(get_ccwdev_lock(cdev));
+
 	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 		kfree(channel->iob[cnt].data);
 	kfree(channel->ccw);
 }
 
+static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
+{
+	struct ccw_device *cdev = channel->ccwdev;
+	int cnt;
+
+	QETH_DBF_TEXT(SETUP, 2, "setupch");
+
+	channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
+	if (!channel->ccw)
+		return -ENOMEM;
+	channel->state = CH_STATE_DOWN;
+	atomic_set(&channel->irq_pending, 0);
+	init_waitqueue_head(&channel->wait_q);
+
+	spin_lock_irq(get_ccwdev_lock(cdev));
+	cdev->handler = qeth_irq;
+	spin_unlock_irq(get_ccwdev_lock(cdev));
+
+	if (!alloc_buffers)
+		return 0;
+
+	for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
+		channel->iob[cnt].data = kmalloc(QETH_BUFSIZE,
+						 GFP_KERNEL | GFP_DMA);
+		if (channel->iob[cnt].data == NULL)
+			break;
+		channel->iob[cnt].state = BUF_STATE_FREE;
+		channel->iob[cnt].channel = channel;
+		channel->iob[cnt].callback = qeth_send_control_data_cb;
+		channel->iob[cnt].rc = 0;
+	}
+	if (cnt < QETH_CMD_BUFFER_NO) {
+		qeth_clean_channel(channel);
+		return -ENOMEM;
+	}
+	channel->io_buf_no = 0;
+	spin_lock_init(&channel->iob_lock);
+
+	return 0;
+}
+
 static void qeth_set_single_write_queues(struct qeth_card *card)
 {
 	if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
@@ -1421,6 +1379,7 @@ static void qeth_set_initial_options(struct qeth_card *card)
 	card->options.rx_sg_cb = QETH_RX_SG_CB;
 	card->options.isolation = ISOLATION_MODE_NONE;
 	card->options.cq = QETH_CQ_DISABLED;
+	card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
 }
 
 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
@@ -1494,7 +1453,7 @@ static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
 			CARD_BUS_ID(card), card->info.mcl_level);
 }
 
-static struct qeth_card *qeth_alloc_card(void)
+static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
 {
 	struct qeth_card *card;
 
@@ -1503,13 +1462,18 @@ static struct qeth_card *qeth_alloc_card(void)
 	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];
 	if (qeth_setup_channel(&card->read, true))
 		goto out_ip;
 	if (qeth_setup_channel(&card->write, true))
 		goto out_channel;
 	if (qeth_setup_channel(&card->data, false))
 		goto out_data;
-	card->options.layer2 = -1;
 	card->qeth_service_level.seq_print = qeth_core_sl_print;
 	register_service_level(&card->qeth_service_level);
 	return card;
@@ -1519,22 +1483,21 @@ out_data:
 out_channel:
 	qeth_clean_channel(&card->read);
 out_ip:
+	dev_set_drvdata(&gdev->dev, NULL);
 	kfree(card);
 out:
 	return NULL;
 }
 
-static int qeth_clear_channel(struct qeth_channel *channel)
+static int qeth_clear_channel(struct qeth_card *card,
+			      struct qeth_channel *channel)
 {
-	unsigned long flags;
-	struct qeth_card *card;
 	int rc;
 
-	card = CARD_FROM_CDEV(channel->ccwdev);
 	QETH_CARD_TEXT(card, 3, "clearch");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 
 	if (rc)
 		return rc;
@@ -1548,17 +1511,15 @@ static int qeth_clear_channel(struct qeth_channel *channel)
 	return 0;
 }
 
-static int qeth_halt_channel(struct qeth_channel *channel)
+static int qeth_halt_channel(struct qeth_card *card,
+			     struct qeth_channel *channel)
 {
-	unsigned long flags;
-	struct qeth_card *card;
 	int rc;
 
-	card = CARD_FROM_CDEV(channel->ccwdev);
 	QETH_CARD_TEXT(card, 3, "haltch");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 
 	if (rc)
 		return rc;
@@ -1576,9 +1537,9 @@ static int qeth_halt_channels(struct qeth_card *card)
 	int rc1 = 0, rc2 = 0, rc3 = 0;
 
 	QETH_CARD_TEXT(card, 3, "haltchs");
-	rc1 = qeth_halt_channel(&card->read);
-	rc2 = qeth_halt_channel(&card->write);
-	rc3 = qeth_halt_channel(&card->data);
+	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)
@@ -1591,9 +1552,9 @@ static int qeth_clear_channels(struct qeth_card *card)
 	int rc1 = 0, rc2 = 0, rc3 = 0;
 
 	QETH_CARD_TEXT(card, 3, "clearchs");
-	rc1 = qeth_clear_channel(&card->read);
-	rc2 = qeth_clear_channel(&card->write);
-	rc3 = qeth_clear_channel(&card->data);
+	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)
@@ -1652,7 +1613,6 @@ static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
 	char *rcd_buf;
 	int ret;
 	struct qeth_channel *channel = &card->data;
-	unsigned long flags;
 
 	/*
 	 * scan for RCD command in extended SenseID data
@@ -1666,11 +1626,11 @@ static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
 
 	qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
 	channel->state = CH_STATE_RCD;
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				       QETH_RCD_PARM, LPM_ANYPATH, 0,
 				       QETH_RCD_TIMEOUT);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 	if (!ret)
 		wait_event(card->wait_q,
 			   (channel->state == CH_STATE_RCD_DONE ||
@@ -1823,30 +1783,29 @@ static void qeth_init_func_level(struct qeth_card *card)
 	}
 }
 
-static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
-		void (*idx_reply_cb)(struct qeth_channel *,
-			struct qeth_cmd_buffer *))
+static int qeth_idx_activate_get_answer(struct qeth_card *card,
+					struct qeth_channel *channel,
+					void (*reply_cb)(struct qeth_card *,
+							 struct qeth_channel *,
+							 struct qeth_cmd_buffer *))
 {
 	struct qeth_cmd_buffer *iob;
-	unsigned long flags;
 	int rc;
-	struct qeth_card *card;
 
 	QETH_DBF_TEXT(SETUP, 2, "idxanswr");
-	card = CARD_FROM_CDEV(channel->ccwdev);
 	iob = qeth_get_buffer(channel);
 	if (!iob)
 		return -ENOMEM;
-	iob->callback = idx_reply_cb;
+	iob->callback = reply_cb;
 	qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 
 	wait_event(card->wait_q,
 		   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
 	QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, QETH_TIMEOUT);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
@@ -1867,26 +1826,24 @@ static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
 	return rc;
 }
 
-static int qeth_idx_activate_channel(struct qeth_channel *channel,
-		void (*idx_reply_cb)(struct qeth_channel *,
-			struct qeth_cmd_buffer *))
+static int qeth_idx_activate_channel(struct qeth_card *card,
+				     struct qeth_channel *channel,
+				     void (*reply_cb)(struct qeth_card *,
+						      struct qeth_channel *,
+						      struct qeth_cmd_buffer *))
 {
-	struct qeth_card *card;
 	struct qeth_cmd_buffer *iob;
-	unsigned long flags;
 	__u16 temp;
 	__u8 tmp;
 	int rc;
 	struct ccw_dev_id temp_devid;
 
-	card = CARD_FROM_CDEV(channel->ccwdev);
-
 	QETH_DBF_TEXT(SETUP, 2, "idxactch");
 
 	iob = qeth_get_buffer(channel);
 	if (!iob)
 		return -ENOMEM;
-	iob->callback = idx_reply_cb;
+	iob->callback = reply_cb;
 	qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
 		       iob->data);
 	if (channel == &card->write) {
@@ -1913,10 +1870,10 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel,
 	wait_event(card->wait_q,
 		   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
 	QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, QETH_TIMEOUT);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
@@ -1938,7 +1895,7 @@ static int qeth_idx_activate_channel(struct qeth_channel *channel,
 		QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
 		return -ETIME;
 	}
-	return qeth_idx_activate_get_answer(channel, idx_reply_cb);
+	return qeth_idx_activate_get_answer(card, channel, reply_cb);
 }
 
 static int qeth_peer_func_level(int level)
@@ -1950,10 +1907,10 @@ static int qeth_peer_func_level(int level)
 	return level;
 }
 
-static void qeth_idx_write_cb(struct qeth_channel *channel,
-		struct qeth_cmd_buffer *iob)
+static void qeth_idx_write_cb(struct qeth_card *card,
+			      struct qeth_channel *channel,
+			      struct qeth_cmd_buffer *iob)
 {
-	struct qeth_card *card;
 	__u16 temp;
 
 	QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
@@ -1962,7 +1919,6 @@ static void qeth_idx_write_cb(struct qeth_channel *channel,
 		channel->state = CH_STATE_ACTIVATING;
 		goto out;
 	}
-	card = CARD_FROM_CDEV(channel->ccwdev);
 
 	if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
 		if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
@@ -1988,10 +1944,10 @@ out:
 	qeth_release_buffer(channel, iob);
 }
 
-static void qeth_idx_read_cb(struct qeth_channel *channel,
-		struct qeth_cmd_buffer *iob)
+static void qeth_idx_read_cb(struct qeth_card *card,
+			     struct qeth_channel *channel,
+			     struct qeth_cmd_buffer *iob)
 {
-	struct qeth_card *card;
 	__u16 temp;
 
 	QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
@@ -2000,7 +1956,6 @@ static void qeth_idx_read_cb(struct qeth_channel *channel,
 		goto out;
 	}
 
-	card = CARD_FROM_CDEV(channel->ccwdev);
 	if (qeth_check_idx_response(card, iob->data))
 			goto out;
 
@@ -2049,7 +2004,7 @@ void qeth_prepare_control_data(struct qeth_card *card, int len,
 		struct qeth_cmd_buffer *iob)
 {
 	qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
-	iob->callback = qeth_release_buffer;
+	iob->callback = qeth_release_buffer_cb;
 
 	memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
 	       &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
@@ -2097,7 +2052,6 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 {
 	struct qeth_channel *channel = iob->channel;
 	int rc;
-	unsigned long flags;
 	struct qeth_reply *reply = NULL;
 	unsigned long timeout, event_timeout;
 	struct qeth_ipa_cmd *cmd = NULL;
@@ -2130,26 +2084,26 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 	}
 	qeth_prepare_control_data(card, len, iob);
 
-	spin_lock_irqsave(&card->lock, flags);
+	spin_lock_irq(&card->lock);
 	list_add_tail(&reply->list, &card->cmd_waiter_list);
-	spin_unlock_irqrestore(&card->lock, flags);
+	spin_unlock_irq(&card->lock);
 
 	timeout = jiffies + event_timeout;
 
 	QETH_CARD_TEXT(card, 6, "noirqpnd");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, event_timeout);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
 			"ccw_device_start rc = %i\n",
 			dev_name(&channel->ccwdev->dev), rc);
 		QETH_CARD_TEXT_(card, 2, " err%d", rc);
-		spin_lock_irqsave(&card->lock, flags);
+		spin_lock_irq(&card->lock);
 		list_del_init(&reply->list);
 		qeth_put_reply(reply);
-		spin_unlock_irqrestore(&card->lock, flags);
+		spin_unlock_irq(&card->lock);
 		qeth_release_buffer(channel, iob);
 		atomic_set(&channel->irq_pending, 0);
 		wake_up(&card->wait_q);
@@ -2177,9 +2131,9 @@ int qeth_send_control_data(struct qeth_card *card, int len,
 
 time_err:
 	reply->rc = -ETIME;
-	spin_lock_irqsave(&reply->card->lock, flags);
+	spin_lock_irq(&card->lock);
 	list_del_init(&reply->list);
-	spin_unlock_irqrestore(&reply->card->lock, flags);
+	spin_unlock_irq(&card->lock);
 	atomic_inc(&reply->received);
 	rc = reply->rc;
 	qeth_put_reply(reply);
@@ -2198,7 +2152,6 @@ static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 	memcpy(&card->token.cm_filter_r,
 	       QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
 	       QETH_MPC_TOKEN_LENGTH);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -2224,7 +2177,6 @@ static int qeth_cm_enable(struct qeth_card *card)
 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
 		unsigned long data)
 {
-
 	struct qeth_cmd_buffer *iob;
 
 	QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
@@ -2233,7 +2185,6 @@ static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
 	memcpy(&card->token.cm_connection_r,
 	       QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
 	       QETH_MPC_TOKEN_LENGTH);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -2255,7 +2206,6 @@ static int qeth_cm_setup(struct qeth_card *card)
 	rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
 				    qeth_cm_setup_cb, NULL);
 	return rc;
-
 }
 
 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
@@ -2284,7 +2234,7 @@ static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
 		if (dev->mtu)
 			new_mtu = dev->mtu;
 		/* default MTUs for first setup: */
-		else if (card->options.layer2)
+		else if (IS_LAYER2(card))
 			new_mtu = ETH_DATA_LEN;
 		else
 			new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
@@ -2315,7 +2265,6 @@ static int qeth_get_mtu_outof_framesize(int framesize)
 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 		unsigned long data)
 {
-
 	__u16 mtu, framesize;
 	__u16 len;
 	__u8 link_type;
@@ -2343,7 +2292,6 @@ static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
 	} else
 		card->info.link_type = 0;
 	QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
-	QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
 	return 0;
 }
 
@@ -2351,7 +2299,7 @@ static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
 {
 	if (IS_OSN(card))
 		return QETH_PROT_OSN2;
-	return (card->options.layer2 == 1) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
+	return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
 }
 
 static int qeth_ulp_enable(struct qeth_card *card)
@@ -2880,23 +2828,18 @@ static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
 }
 
 static void qeth_fill_ipacmd_header(struct qeth_card *card,
-		struct qeth_ipa_cmd *cmd, __u8 command,
-		enum qeth_prot_versions prot)
+				    struct qeth_ipa_cmd *cmd,
+				    enum qeth_ipa_cmds command,
+				    enum qeth_prot_versions prot)
 {
-	memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
 	cmd->hdr.command = command;
 	cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
 	/* cmd->hdr.seqno is set by qeth_send_control_data() */
 	cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
 	cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
-	if (card->options.layer2)
-		cmd->hdr.prim_version_no = 2;
-	else
-		cmd->hdr.prim_version_no = 1;
+	cmd->hdr.prim_version_no = IS_LAYER2(card) ? 2 : 1;
 	cmd->hdr.param_count = 1;
 	cmd->hdr.prot_version = prot;
-	cmd->hdr.ipa_supported = 0;
-	cmd->hdr.ipa_enabled = 0;
 }
 
 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
@@ -3043,7 +2986,7 @@ static int qeth_query_ipassists_cb(struct qeth_card *card,
 		QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
 		card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
 		card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
-		return -0;
+		return 0;
 	default:
 		if (cmd->hdr.return_code) {
 			QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
@@ -3787,7 +3730,7 @@ EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
  * fragmented part of the SKB. Returns zero for linear SKB.
  */
-int qeth_get_elements_for_frags(struct sk_buff *skb)
+static int qeth_get_elements_for_frags(struct sk_buff *skb)
 {
 	int cnt, elements = 0;
 
@@ -3800,9 +3743,17 @@ int qeth_get_elements_for_frags(struct sk_buff *skb)
 	}
 	return elements;
 }
-EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
 
-static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)
+/**
+ * qeth_count_elements() -	Counts the number of QDIO buffer elements needed
+ *				to transmit an skb.
+ * @skb:			the skb to operate on.
+ * @data_offset:		skip this part of the skb's linear data
+ *
+ * Returns the number of pages, and thus QDIO buffer elements, needed to map the
+ * skb's data (both its linear part and paged fragments).
+ */
+unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
 {
 	unsigned int elements = qeth_get_elements_for_frags(skb);
 	addr_t end = (addr_t)skb->data + skb_headlen(skb);
@@ -3812,54 +3763,10 @@ static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)
 		elements += qeth_get_elements_for_range(start, end);
 	return elements;
 }
+EXPORT_SYMBOL_GPL(qeth_count_elements);
 
-/**
- * qeth_get_elements_no() -	find number of SBALEs for skb data, inc. frags.
- * @card:			qeth card structure, to check max. elems.
- * @skb:			SKB address
- * @extra_elems:		extra elems needed, to check against max.
- * @data_offset:		range starts at skb->data + data_offset
- *
- * Returns the number of pages, and thus QDIO buffer elements, needed to cover
- * skb data, including linear part and fragments. Checks if the result plus
- * extra_elems fits under the limit for the card. Returns 0 if it does not.
- * Note: extra_elems is not included in the returned result.
- */
-int qeth_get_elements_no(struct qeth_card *card,
-		     struct sk_buff *skb, int extra_elems, int data_offset)
-{
-	int elements = qeth_count_elements(skb, data_offset);
-
-	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
-		QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
-			"(Number=%d / Length=%d). Discarded.\n",
-			elements + extra_elems, skb->len);
-		return 0;
-	}
-	return elements;
-}
-EXPORT_SYMBOL_GPL(qeth_get_elements_no);
-
-int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
-{
-	int hroom, inpage, rest;
-
-	if (((unsigned long)skb->data & PAGE_MASK) !=
-	    (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
-		hroom = skb_headroom(skb);
-		inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
-		rest = len - inpage;
-		if (rest > hroom)
-			return 1;
-		memmove(skb->data - rest, skb->data, skb_headlen(skb));
-		skb->data -= rest;
-		skb->tail -= rest;
-		*hdr = (struct qeth_hdr *)skb->data;
-		QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
-	}
-	return 0;
-}
-EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
+#define QETH_HDR_CACHE_OBJ_SIZE		(sizeof(struct qeth_hdr_tso) + \
+					 MAX_TCP_HEADER)
 
 /**
  * qeth_add_hw_header() - add a HW header to an skb.
@@ -3894,7 +3801,11 @@ check_layout:
 	if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
 		/* Push HW header into same page as first protocol header. */
 		push_ok = true;
-		__elements = qeth_count_elements(skb, 0);
+		/* ... but TSO always needs a separate element for headers: */
+		if (skb_is_gso(skb))
+			__elements = 1 + qeth_count_elements(skb, proto_len);
+		else
+			__elements = qeth_count_elements(skb, 0);
 	} else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
 		/* Push HW header into a new page. */
 		push_ok = true;
@@ -3935,6 +3846,8 @@ check_layout:
 		return hdr_len;
 	}
 	/* fall back */
+	if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
+		return -E2BIG;
 	*hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 	if (!*hdr)
 		return -ENOMEM;
@@ -4026,8 +3939,7 @@ static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
 	bool is_first_elem = true;
 	int flush_cnt = 0;
 
-	refcount_inc(&skb->users);
-	skb_queue_tail(&buf->skb_list, skb);
+	__skb_queue_tail(&buf->skb_list, skb);
 
 	/* build dedicated header element */
 	if (hd_len) {
@@ -4176,6 +4088,97 @@ out:
 }
 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
 
+void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, unsigned int payload_len,
+		       struct sk_buff *skb, unsigned int proto_len)
+{
+	struct qeth_hdr_ext_tso *ext = &hdr->ext;
+
+	ext->hdr_tot_len = sizeof(*ext);
+	ext->imb_hdr_no = 1;
+	ext->hdr_type = 1;
+	ext->hdr_version = 1;
+	ext->hdr_len = 28;
+	ext->payload_len = payload_len;
+	ext->mss = skb_shinfo(skb)->gso_size;
+	ext->dg_hdr_len = proto_len;
+}
+EXPORT_SYMBOL_GPL(qeth_fill_tso_ext);
+
+int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
+	      struct qeth_qdio_out_q *queue, int ipv, int cast_type,
+	      void (*fill_header)(struct qeth_card *card, struct qeth_hdr *hdr,
+				  struct sk_buff *skb, int ipv, int cast_type,
+				  unsigned int data_len))
+{
+	unsigned int proto_len, hw_hdr_len;
+	unsigned int frame_len = skb->len;
+	bool is_tso = skb_is_gso(skb);
+	unsigned int data_offset = 0;
+	struct qeth_hdr *hdr = NULL;
+	unsigned int hd_len = 0;
+	unsigned int elements;
+	int push_len, rc;
+	bool is_sg;
+
+	if (is_tso) {
+		hw_hdr_len = sizeof(struct qeth_hdr_tso);
+		proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+	} else {
+		hw_hdr_len = sizeof(struct qeth_hdr);
+		proto_len = IS_IQD(card) ? ETH_HLEN : 0;
+	}
+
+	rc = skb_cow_head(skb, hw_hdr_len);
+	if (rc)
+		return rc;
+
+	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
+				      &elements);
+	if (push_len < 0)
+		return push_len;
+	if (is_tso || !push_len) {
+		/* HW header needs its own buffer element. */
+		hd_len = hw_hdr_len + proto_len;
+		data_offset = push_len + proto_len;
+	}
+	memset(hdr, 0, hw_hdr_len);
+	fill_header(card, hdr, skb, ipv, cast_type, frame_len);
+	if (is_tso)
+		qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
+				  frame_len - proto_len, skb, proto_len);
+
+	is_sg = skb_is_nonlinear(skb);
+	if (IS_IQD(card)) {
+		rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
+					      hd_len);
+	} else {
+		/* TODO: drop skb_orphan() once TX completion is fast enough */
+		skb_orphan(skb);
+		rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
+					 hd_len, elements);
+	}
+
+	if (!rc) {
+		if (card->options.performance_stats) {
+			card->perf_stats.buf_elements_sent += elements;
+			if (is_sg)
+				card->perf_stats.sg_skbs_sent++;
+			if (is_tso) {
+				card->perf_stats.large_send_bytes += frame_len;
+				card->perf_stats.large_send_cnt++;
+			}
+		}
+	} else {
+		if (!push_len)
+			kmem_cache_free(qeth_core_header_cache, hdr);
+		if (rc == -EBUSY)
+			/* roll back to ETH header */
+			skb_pull(skb, push_len);
+	}
+	return rc;
+}
+EXPORT_SYMBOL_GPL(qeth_xmit);
+
 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
 		struct qeth_reply *reply, unsigned long data)
 {
@@ -4243,8 +4246,7 @@ static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
 	if (qeth_setadpparms_inspect_rc(cmd))
 		return 0;
 
-	if (!card->options.layer2 ||
-	    !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
+	if (IS_LAYER3(card) || !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
 		ether_addr_copy(card->dev->dev_addr,
 				cmd->data.setadapterparms.data.change_addr.addr);
 		card->info.mac_bits |= QETH_LAYER2_MAC_READ;
@@ -4598,9 +4600,9 @@ static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
 		return -EOPNOTSUPP;
 
 	if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
-	    (!card->options.layer2)) {
+	    IS_LAYER3(card))
 		return -EOPNOTSUPP;
-	}
+
 	/* skip 4 bytes (data_len struct member) to get req_len */
 	if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
 		return -EFAULT;
@@ -5044,6 +5046,7 @@ static void qeth_core_free_card(struct qeth_card *card)
 	qeth_clean_channel(&card->data);
 	qeth_free_qdio_buffers(card);
 	unregister_service_level(&card->qeth_service_level);
+	dev_set_drvdata(&card->gdev->dev, NULL);
 	kfree(card);
 }
 
@@ -5123,7 +5126,7 @@ retriable:
 	qeth_determine_capabilities(card);
 	qeth_init_tokens(card);
 	qeth_init_func_level(card);
-	rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
+	rc = qeth_idx_activate_channel(card, &card->read, qeth_idx_read_cb);
 	if (rc == -ERESTARTSYS) {
 		QETH_DBF_TEXT(SETUP, 2, "break2");
 		return rc;
@@ -5134,7 +5137,7 @@ retriable:
 		else
 			goto retry;
 	}
-	rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
+	rc = qeth_idx_activate_channel(card, &card->write, qeth_idx_write_cb);
 	if (rc == -ERESTARTSYS) {
 		QETH_DBF_TEXT(SETUP, 2, "break3");
 		return rc;
@@ -5158,13 +5161,14 @@ retriable:
 		if (rc == IPA_RC_LAN_OFFLINE) {
 			dev_warn(&card->gdev->dev,
 				"The LAN is offline\n");
-			card->lan_online = 0;
+			netif_carrier_off(card->dev);
 		} else {
 			rc = -ENODEV;
 			goto out;
 		}
-	} else
-		card->lan_online = 1;
+	} else {
+		netif_carrier_on(card->dev);
+	}
 
 	card->options.ipa4.supported_funcs = 0;
 	card->options.ipa6.supported_funcs = 0;
@@ -5421,6 +5425,21 @@ static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
 	return cmd->hdr.return_code;
 }
 
+static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
+					struct qeth_reply *reply,
+					unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct qeth_ipa_caps *caps = reply->param;
+
+	if (qeth_setassparms_inspect_rc(cmd))
+		return 0;
+
+	caps->supported = cmd->data.setassparms.data.caps.supported;
+	caps->enabled = cmd->data.setassparms.data.caps.enabled;
+	return 0;
+}
+
 int qeth_setassparms_cb(struct qeth_card *card,
 			struct qeth_reply *reply, unsigned long data)
 {
@@ -5456,8 +5475,6 @@ struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
 		cmd->data.setassparms.hdr.assist_no = ipa_func;
 		cmd->data.setassparms.hdr.length = 8 + len;
 		cmd->data.setassparms.hdr.command_code = cmd_code;
-		cmd->data.setassparms.hdr.return_code = 0;
-		cmd->data.setassparms.hdr.seq_no = 0;
 	}
 
 	return iob;
@@ -5560,11 +5577,11 @@ static int qeth_register_dbf_views(void)
 	return 0;
 }
 
+static DEFINE_MUTEX(qeth_mod_mutex);	/* for synchronized module loading */
+
 int qeth_core_load_discipline(struct qeth_card *card,
 		enum qeth_discipline_id discipline)
 {
-	int rc = 0;
-
 	mutex_lock(&qeth_mod_mutex);
 	switch (discipline) {
 	case QETH_DISCIPLINE_LAYER3:
@@ -5578,22 +5595,25 @@ int qeth_core_load_discipline(struct qeth_card *card,
 	default:
 		break;
 	}
+	mutex_unlock(&qeth_mod_mutex);
 
 	if (!card->discipline) {
 		dev_err(&card->gdev->dev, "There is no kernel module to "
 			"support discipline %d\n", discipline);
-		rc = -EINVAL;
+		return -EINVAL;
 	}
-	mutex_unlock(&qeth_mod_mutex);
-	return rc;
+
+	card->options.layer = discipline;
+	return 0;
 }
 
 void qeth_core_free_discipline(struct qeth_card *card)
 {
-	if (card->options.layer2)
+	if (IS_LAYER2(card))
 		symbol_put(qeth_l2_discipline);
 	else
 		symbol_put(qeth_l3_discipline);
+	card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
 	card->discipline = NULL;
 }
 
@@ -5731,7 +5751,6 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 	struct device *dev;
 	int rc;
 	enum qeth_discipline_id enforced_disc;
-	unsigned long flags;
 	char dbf_name[DBF_NAME_LEN];
 
 	QETH_DBF_TEXT(SETUP, 2, "probedev");
@@ -5742,7 +5761,7 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 
 	QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
 
-	card = qeth_alloc_card();
+	card = qeth_alloc_card(gdev);
 	if (!card) {
 		QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
 		rc = -ENOMEM;
@@ -5758,15 +5777,6 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 			goto err_card;
 	}
 
-	card->read.ccwdev  = gdev->cdev[0];
-	card->write.ccwdev = gdev->cdev[1];
-	card->data.ccwdev  = gdev->cdev[2];
-	dev_set_drvdata(&gdev->dev, card);
-	card->gdev = gdev;
-	gdev->cdev[0]->handler = qeth_irq;
-	gdev->cdev[1]->handler = qeth_irq;
-	gdev->cdev[2]->handler = qeth_irq;
-
 	qeth_setup_card(card);
 	qeth_update_from_chp_desc(card);
 
@@ -5797,9 +5807,9 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 		break;
 	}
 
-	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
+	write_lock_irq(&qeth_core_card_list.rwlock);
 	list_add_tail(&card->list, &qeth_core_card_list.list);
-	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
+	write_unlock_irq(&qeth_core_card_list.rwlock);
 	return 0;
 
 err_disc:
@@ -5815,7 +5825,6 @@ err_dev:
 
 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
 {
-	unsigned long flags;
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 
 	QETH_DBF_TEXT(SETUP, 2, "removedv");
@@ -5825,12 +5834,11 @@ static void qeth_core_remove_device(struct ccwgroup_device *gdev)
 		qeth_core_free_discipline(card);
 	}
 
-	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
+	write_lock_irq(&qeth_core_card_list.rwlock);
 	list_del(&card->list);
-	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
+	write_unlock_irq(&qeth_core_card_list.rwlock);
 	free_netdev(card->dev);
 	qeth_core_free_card(card);
-	dev_set_drvdata(&gdev->dev, NULL);
 	put_device(&gdev->dev);
 }
 
@@ -6123,7 +6131,7 @@ void qeth_core_get_drvinfo(struct net_device *dev,
 {
 	struct qeth_card *card = dev->ml_priv;
 
-	strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
+	strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
 		sizeof(info->driver));
 	strlcpy(info->version, "1.0", sizeof(info->version));
 	strlcpy(info->fw_version, card->info.mcl_level,
@@ -6434,27 +6442,85 @@ static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
 	return rc ? -EIO : 0;
 }
 
-static int qeth_set_ipa_tso(struct qeth_card *card, int on)
+static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
+			     unsigned long data)
+{
+	struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
+	struct qeth_tso_start_data *tso_data = reply->param;
+
+	if (qeth_setassparms_inspect_rc(cmd))
+		return 0;
+
+	tso_data->mss = cmd->data.setassparms.data.tso.mss;
+	tso_data->supported = cmd->data.setassparms.data.tso.supported;
+	return 0;
+}
+
+static int qeth_set_tso_off(struct qeth_card *card,
+			    enum qeth_prot_versions prot)
 {
+	return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
+						 IPA_CMD_ASS_STOP, 0, prot);
+}
+
+static int qeth_set_tso_on(struct qeth_card *card,
+			   enum qeth_prot_versions prot)
+{
+	struct qeth_tso_start_data tso_data;
+	struct qeth_cmd_buffer *iob;
+	struct qeth_ipa_caps caps;
 	int rc;
 
-	QETH_CARD_TEXT(card, 3, "sttso");
+	iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
+				       IPA_CMD_ASS_START, 0, prot);
+	if (!iob)
+		return -ENOMEM;
 
-	if (on) {
-		rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
-						  IPA_CMD_ASS_START, 0);
-		if (rc) {
-			dev_warn(&card->gdev->dev,
-				 "Starting outbound TCP segmentation offload for %s failed\n",
-				 QETH_CARD_IFNAME(card));
-			return -EIO;
-		}
-		dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
-	} else {
-		rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
-						  IPA_CMD_ASS_STOP, 0);
+	rc = qeth_send_setassparms(card, iob, 0, 0 /* unused */,
+				   qeth_start_tso_cb, &tso_data);
+	if (rc)
+		return rc;
+
+	if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
+		qeth_set_tso_off(card, prot);
+		return -EOPNOTSUPP;
 	}
-	return rc;
+
+	iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
+				       IPA_CMD_ASS_ENABLE, sizeof(caps), prot);
+	if (!iob) {
+		qeth_set_tso_off(card, prot);
+		return -ENOMEM;
+	}
+
+	/* enable TSO capability */
+	caps.supported = 0;
+	caps.enabled = QETH_IPA_LARGE_SEND_TCP;
+	rc = qeth_send_setassparms(card, iob, sizeof(caps), (long) &caps,
+				   qeth_setassparms_get_caps_cb, &caps);
+	if (rc) {
+		qeth_set_tso_off(card, prot);
+		return rc;
+	}
+
+	if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
+	    !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
+		qeth_set_tso_off(card, prot);
+		return -EOPNOTSUPP;
+	}
+
+	dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
+		 tso_data.mss);
+	return 0;
+}
+
+static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
+			    enum qeth_prot_versions prot)
+{
+	int rc = on ? qeth_set_tso_on(card, prot) :
+		      qeth_set_tso_off(card, prot);
+
+	return rc ? -EIO : 0;
 }
 
 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
@@ -6481,7 +6547,7 @@ static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
 }
 
 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
-			  NETIF_F_IPV6_CSUM)
+			  NETIF_F_IPV6_CSUM | NETIF_F_TSO6)
 /**
  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
  * @dev:	a net_device
@@ -6531,11 +6597,18 @@ int qeth_set_features(struct net_device *dev, netdev_features_t features)
 		if (rc)
 			changed ^= NETIF_F_RXCSUM;
 	}
-	if ((changed & NETIF_F_TSO)) {
-		rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
+	if (changed & NETIF_F_TSO) {
+		rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
+				      QETH_PROT_IPV4);
 		if (rc)
 			changed ^= NETIF_F_TSO;
 	}
+	if (changed & NETIF_F_TSO6) {
+		rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
+				      QETH_PROT_IPV6);
+		if (rc)
+			changed ^= NETIF_F_TSO6;
+	}
 
 	/* everything changed successfully? */
 	if ((dev->features ^ features) == changed)
@@ -6561,6 +6634,8 @@ netdev_features_t qeth_fix_features(struct net_device *dev,
 		features &= ~NETIF_F_RXCSUM;
 	if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
 		features &= ~NETIF_F_TSO;
+	if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
+		features &= ~NETIF_F_TSO6;
 	/* if the card isn't up, remove features that require hw changes */
 	if (card->state == CARD_STATE_DOWN ||
 	    card->state == CARD_STATE_RECOVER)
@@ -6602,9 +6677,7 @@ static int __init qeth_core_init(void)
 
 	pr_info("loading core functions\n");
 	INIT_LIST_HEAD(&qeth_core_card_list.list);
-	INIT_LIST_HEAD(&qeth_dbf_list);
 	rwlock_init(&qeth_core_card_list.rwlock);
-	mutex_init(&qeth_mod_mutex);
 
 	qeth_wq = create_singlethread_workqueue("qeth_wq");
 	if (!qeth_wq) {
@@ -6619,8 +6692,10 @@ static int __init qeth_core_init(void)
 	rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
 	if (rc)
 		goto register_err;
-	qeth_core_header_cache = kmem_cache_create("qeth_hdr",
-			sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
+	qeth_core_header_cache =
+		kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
+				  roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
+				  0, NULL);
 	if (!qeth_core_header_cache) {
 		rc = -ENOMEM;
 		goto slab_err;
diff --git a/drivers/s390/net/qeth_core_mpc.h b/drivers/s390/net/qeth_core_mpc.h
index aa5de1fe01e1..e85090467afe 100644
--- a/drivers/s390/net/qeth_core_mpc.h
+++ b/drivers/s390/net/qeth_core_mpc.h
@@ -56,6 +56,21 @@ static inline bool qeth_intparm_is_iob(unsigned long intparm)
 #define IPA_CMD_INITIATOR_OSA_REPLY   0x81
 #define IPA_CMD_PRIM_VERSION_NO 0x01
 
+struct qeth_ipa_caps {
+	u32 supported;
+	u32 enabled;
+};
+
+static inline bool qeth_ipa_caps_supported(struct qeth_ipa_caps *caps, u32 mask)
+{
+	return (caps->supported & mask) == mask;
+}
+
+static inline bool qeth_ipa_caps_enabled(struct qeth_ipa_caps *caps, u32 mask)
+{
+	return (caps->enabled & mask) == mask;
+}
+
 enum qeth_card_types {
 	QETH_CARD_TYPE_OSD     = 1,
 	QETH_CARD_TYPE_IQD     = 5,
@@ -405,14 +420,25 @@ struct qeth_checksum_cmd {
 	__u32 enabled;
 } __packed;
 
+enum qeth_ipa_large_send_caps {
+	QETH_IPA_LARGE_SEND_TCP		= 0x00000001,
+};
+
+struct qeth_tso_start_data {
+	u32 mss;
+	u32 supported;
+};
+
 /* SETASSPARMS IPA Command: */
 struct qeth_ipacmd_setassparms {
 	struct qeth_ipacmd_setassparms_hdr hdr;
 	union {
 		__u32 flags_32bit;
+		struct qeth_ipa_caps caps;
 		struct qeth_checksum_cmd chksum;
 		struct qeth_arp_cache_entry add_arp_entry;
 		struct qeth_arp_query_data query_arp;
+		struct qeth_tso_start_data tso;
 		__u8 ip[16];
 	} data;
 } __attribute__ ((packed));
diff --git a/drivers/s390/net/qeth_core_sys.c b/drivers/s390/net/qeth_core_sys.c
index 25d0be25bcb3..30f61608fa22 100644
--- a/drivers/s390/net/qeth_core_sys.c
+++ b/drivers/s390/net/qeth_core_sys.c
@@ -31,10 +31,9 @@ static ssize_t qeth_dev_state_show(struct device *dev,
 	case CARD_STATE_SOFTSETUP:
 		return sprintf(buf, "SOFTSETUP\n");
 	case CARD_STATE_UP:
-		if (card->lan_online)
-		return sprintf(buf, "UP (LAN ONLINE)\n");
-		else
-			return sprintf(buf, "UP (LAN OFFLINE)\n");
+		return sprintf(buf, "UP (LAN %s)\n",
+			       netif_carrier_ok(card->dev) ? "ONLINE" :
+							     "OFFLINE");
 	case CARD_STATE_RECOVER:
 		return sprintf(buf, "RECOVER\n");
 	default:
@@ -228,7 +227,7 @@ static ssize_t qeth_dev_prioqing_store(struct device *dev,
 		card->qdio.do_prio_queueing = QETH_PRIO_Q_ING_TOS;
 		card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
 	} else if (sysfs_streq(buf, "prio_queueing_vlan")) {
-		if (!card->options.layer2) {
+		if (IS_LAYER3(card)) {
 			rc = -ENOTSUPP;
 			goto out;
 		}
@@ -379,7 +378,7 @@ static ssize_t qeth_dev_layer2_show(struct device *dev,
 	if (!card)
 		return -EINVAL;
 
-	return sprintf(buf, "%i\n", card->options.layer2);
+	return sprintf(buf, "%i\n", card->options.layer);
 }
 
 static ssize_t qeth_dev_layer2_store(struct device *dev,
@@ -413,7 +412,7 @@ static ssize_t qeth_dev_layer2_store(struct device *dev,
 		goto out;
 	}
 
-	if (card->options.layer2 == newdis)
+	if (card->options.layer == newdis)
 		goto out;
 	if (card->info.layer_enforced) {
 		/* fixed layer, can't switch */
@@ -432,8 +431,6 @@ static ssize_t qeth_dev_layer2_store(struct device *dev,
 
 		card->discipline->remove(card->gdev);
 		qeth_core_free_discipline(card);
-		card->options.layer2 = -1;
-
 		free_netdev(card->dev);
 		card->dev = ndev;
 	}
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index b5e38531733f..23aaf373f631 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -193,15 +193,25 @@ static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 	return RTN_UNICAST;
 }
 
-static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
-				int cast_type, unsigned int data_len)
+static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
+				struct sk_buff *skb, int ipv, int cast_type,
+				unsigned int data_len)
 {
-	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
+	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 
-	memset(hdr, 0, sizeof(struct qeth_hdr));
-	hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 	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], ipv);
+			if (card->options.performance_stats)
+				card->perf_stats.tx_csum++;
+		}
+	}
+
 	/* set byte byte 3 to casting flags */
 	if (cast_type == RTN_MULTICAST)
 		hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
@@ -641,84 +651,43 @@ static void qeth_l2_set_rx_mode(struct net_device *dev)
 		qeth_promisc_to_bridge(card);
 }
 
-static int qeth_l2_xmit(struct qeth_card *card, struct sk_buff *skb,
-			struct qeth_qdio_out_q *queue, int cast_type, int ipv)
+static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
+			    struct qeth_qdio_out_q *queue)
 {
-	const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0;
-	const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);
-	unsigned int frame_len = skb->len;
-	unsigned int data_offset = 0;
-	struct qeth_hdr *hdr = NULL;
+	struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
+	addr_t end = (addr_t)(skb->data + sizeof(*hdr));
+	addr_t start = (addr_t)skb->data;
+	unsigned int elements = 0;
 	unsigned int hd_len = 0;
-	unsigned int elements;
-	int push_len, rc;
-	bool is_sg;
+	int rc;
 
-	rc = skb_cow_head(skb, hw_hdr_len);
-	if (rc)
-		return rc;
+	if (skb->protocol == htons(ETH_P_IPV6))
+		return -EPROTONOSUPPORT;
 
-	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
-				      &elements);
-	if (push_len < 0)
-		return push_len;
-	if (!push_len) {
-		/* HW header needs its own buffer element. */
-		hd_len = hw_hdr_len + proto_len;
-		data_offset = proto_len;
-	}
-	qeth_l2_fill_header(hdr, skb, cast_type, frame_len);
-	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
-		if (card->options.performance_stats)
-			card->perf_stats.tx_csum++;
+	if (qeth_get_elements_for_range(start, end) > 1) {
+		/* Misaligned HW header, move it to its own buffer element. */
+		hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
+		if (!hdr)
+			return -ENOMEM;
+		hd_len = sizeof(*hdr);
+		skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
+		elements++;
 	}
 
-	is_sg = skb_is_nonlinear(skb);
-	if (IS_IQD(card)) {
-		rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
-					      hd_len);
-	} else {
-		/* TODO: drop skb_orphan() once TX completion is fast enough */
-		skb_orphan(skb);
-		rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
-					 hd_len, elements);
+	elements += qeth_count_elements(skb, hd_len);
+	if (elements > QETH_MAX_BUFFER_ELEMENTS(card)) {
+		rc = -E2BIG;
+		goto out;
 	}
 
-	if (!rc) {
-		if (card->options.performance_stats) {
-			card->perf_stats.buf_elements_sent += elements;
-			if (is_sg)
-				card->perf_stats.sg_skbs_sent++;
-		}
-	} else {
-		if (!push_len)
-			kmem_cache_free(qeth_core_header_cache, hdr);
-		if (rc == -EBUSY)
-			/* roll back to ETH header */
-			skb_pull(skb, push_len);
-	}
+	rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
+				 elements);
+out:
+	if (rc && hd_len)
+		kmem_cache_free(qeth_core_header_cache, hdr);
 	return rc;
 }
 
-static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
-			    struct qeth_qdio_out_q *queue)
-{
-	unsigned int elements;
-	struct qeth_hdr *hdr;
-
-	if (skb->protocol == htons(ETH_P_IPV6))
-		return -EPROTONOSUPPORT;
-
-	hdr = (struct qeth_hdr *)skb->data;
-	elements = qeth_get_elements_no(card, skb, 0, 0);
-	if (!elements)
-		return -E2BIG;
-	if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
-		return -EINVAL;
-	return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
-}
-
 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 					   struct net_device *dev)
 {
@@ -729,7 +698,7 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 	int tx_bytes = skb->len;
 	int rc;
 
-	if ((card->state != CARD_STATE_UP) || !card->lan_online) {
+	if (card->state != CARD_STATE_UP) {
 		card->stats.tx_carrier_errors++;
 		goto tx_drop;
 	}
@@ -745,7 +714,8 @@ static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 	if (IS_OSN(card))
 		rc = qeth_l2_xmit_osn(card, skb, queue);
 	else
-		rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv);
+		rc = qeth_xmit(card, skb, queue, ipv, cast_type,
+			       qeth_l2_fill_header);
 
 	if (!rc) {
 		card->stats.tx_packets++;
@@ -789,7 +759,10 @@ static int __qeth_l2_open(struct net_device *dev)
 
 	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 		napi_enable(&card->napi);
+		local_bh_disable();
 		napi_schedule(&card->napi);
+		/* kick-start the NAPI softirq: */
+		local_bh_enable();
 	} else
 		rc = -EIO;
 	return rc;
@@ -837,7 +810,6 @@ static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 	}
 	INIT_LIST_HEAD(&card->vid_list);
 	hash_init(card->mac_htable);
-	card->options.layer2 = 1;
 	card->info.hwtrap = 0;
 	qeth_l2_vnicc_set_defaults(card);
 	return 0;
@@ -929,6 +901,20 @@ static int qeth_l2_setup_netdev(struct qeth_card *card)
 		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_set_gso_max_size(card->dev,
+				       PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
+	}
 
 	qeth_l2_request_initial_mac(card);
 	netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
@@ -1029,10 +1015,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 		goto out_remove;
 	}
 	card->state = CARD_STATE_SOFTSETUP;
-	if (card->lan_online)
-		netif_carrier_on(card->dev);
-	else
-		netif_carrier_off(card->dev);
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 
@@ -1178,9 +1160,6 @@ static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 
-	if (gdev->state == CCWGROUP_OFFLINE)
-		goto out;
-
 	if (card->state == CARD_STATE_RECOVER) {
 		rc = __qeth_l2_set_online(card->gdev, 1);
 		if (rc) {
@@ -1190,7 +1169,7 @@ static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
 		}
 	} else
 		rc = __qeth_l2_set_online(card->gdev, 0);
-out:
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	netif_device_attach(card->dev);
 	if (rc)
@@ -1240,7 +1219,6 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len,
 			   struct qeth_cmd_buffer *iob)
 {
 	struct qeth_channel *channel = iob->channel;
-	unsigned long flags;
 	int rc = 0;
 
 	QETH_CARD_TEXT(card, 5, "osndctrd");
@@ -1249,10 +1227,10 @@ static int qeth_osn_send_control_data(struct qeth_card *card, int len,
 		   atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
 	qeth_prepare_control_data(card, len, iob);
 	QETH_CARD_TEXT(card, 6, "osnoirqp");
-	spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
 	rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
 				      (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
-	spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
+	spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
 	if (rc) {
 		QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
 			   "ccw_device_start rc = %i\n", rc);
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index ada258c01a08..0b161cc1fd2e 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -33,7 +33,6 @@
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
 #include <net/ip6_fib.h>
-#include <net/ip6_checksum.h>
 #include <net/iucv/af_iucv.h>
 #include <linux/hashtable.h>
 
@@ -1349,6 +1348,7 @@ static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
 				int budget, int *done)
 {
+	struct net_device *dev = card->dev;
 	int work_done = 0;
 	struct sk_buff *skb;
 	struct qeth_hdr *hdr;
@@ -1370,11 +1370,10 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
 			magic = *(__u16 *)skb->data;
 			if ((card->info.type == QETH_CARD_TYPE_IQD) &&
 			    (magic == ETH_P_AF_IUCV)) {
-				skb->protocol = cpu_to_be16(ETH_P_AF_IUCV);
 				len = skb->len;
-				card->dev->header_ops->create(skb, card->dev, 0,
-					card->dev->dev_addr, "FAKELL", len);
-				skb_reset_mac_header(skb);
+				dev_hard_header(skb, dev, ETH_P_AF_IUCV,
+						dev->dev_addr, "FAKELL", len);
+				skb->protocol = eth_type_trans(skb, dev);
 				netif_receive_skb(skb);
 			} else {
 				qeth_l3_rebuild_skb(card, skb, hdr);
@@ -1983,39 +1982,38 @@ static int qeth_l3_get_cast_type(struct sk_buff *skb)
 	rcu_read_unlock();
 
 	/* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
-	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6)
-		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
-				RTN_MULTICAST : RTN_UNICAST;
-	else if (be16_to_cpu(skb->protocol) == ETH_P_IP)
+	switch (qeth_get_ip_version(skb)) {
+	case 4:
 		return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
 				RTN_MULTICAST : RTN_UNICAST;
-
-	/* ... and MAC address */
-	if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, skb->dev->broadcast))
-		return RTN_BROADCAST;
-	if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
-		return RTN_MULTICAST;
-
-	/* default to unicast */
-	return RTN_UNICAST;
+	case 6:
+		return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
+				RTN_MULTICAST : RTN_UNICAST;
+	default:
+		/* ... and MAC address */
+		if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest,
+					    skb->dev->broadcast))
+			return RTN_BROADCAST;
+		if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
+			return RTN_MULTICAST;
+		/* default to unicast */
+		return RTN_UNICAST;
+	}
 }
 
 static void qeth_l3_fill_af_iucv_hdr(struct qeth_hdr *hdr, struct sk_buff *skb,
 				     unsigned int data_len)
 {
 	char daddr[16];
-	struct af_iucv_trans_hdr *iucv_hdr;
 
-	memset(hdr, 0, sizeof(struct qeth_hdr));
 	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
 	hdr->hdr.l3.length = data_len;
 	hdr->hdr.l3.flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
 
-	iucv_hdr = (struct af_iucv_trans_hdr *)(skb_mac_header(skb) + ETH_HLEN);
 	memset(daddr, 0, sizeof(daddr));
 	daddr[0] = 0xfe;
 	daddr[1] = 0x80;
-	memcpy(&daddr[8], iucv_hdr->destUserID, 8);
+	memcpy(&daddr[8], iucv_trans_hdr(skb)->destUserID, 8);
 	memcpy(hdr->hdr.l3.next_hop.ipv6_addr, daddr, 16);
 }
 
@@ -2034,26 +2032,33 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 				struct sk_buff *skb, int ipv, int cast_type,
 				unsigned int data_len)
 {
-	memset(hdr, 0, sizeof(struct qeth_hdr));
-	hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
+	struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
+
 	hdr->hdr.l3.length = data_len;
 
-	/*
-	 * before we're going to overwrite this location with next hop ip.
-	 * v6 uses passthrough, v4 sets the tag in the QDIO header.
-	 */
-	if (skb_vlan_tag_present(skb)) {
-		if ((ipv == 4) || (card->info.type == QETH_CARD_TYPE_IQD))
-			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_VLAN_FRAME;
-		else
-			hdr->hdr.l3.ext_flags = QETH_HDR_EXT_INCLUDE_VLAN_TAG;
-		hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
+	if (skb_is_gso(skb)) {
+		hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
+	} else {
+		hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
+		if (skb->ip_summed == CHECKSUM_PARTIAL) {
+			qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
+			/* some HW requires combined L3+L4 csum offload: */
+			if (ipv == 4)
+				hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
+			if (card->options.performance_stats)
+				card->perf_stats.tx_csum++;
+		}
 	}
 
-	if (!skb_is_gso(skb) && skb->ip_summed == CHECKSUM_PARTIAL) {
-		qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
-		if (card->options.performance_stats)
-			card->perf_stats.tx_csum++;
+	if (ipv == 4 || IS_IQD(card)) {
+		/* NETIF_F_HW_VLAN_CTAG_TX */
+		if (skb_vlan_tag_present(skb)) {
+			hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
+			hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
+		}
+	} else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
+		hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
+		hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
 	}
 
 	/* OSA only: */
@@ -2094,85 +2099,41 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 	rcu_read_unlock();
 }
 
-static void qeth_tso_fill_header(struct qeth_card *card,
-		struct qeth_hdr *qhdr, struct sk_buff *skb)
+static void qeth_l3_fixup_headers(struct sk_buff *skb)
 {
-	struct qeth_hdr_tso *hdr = (struct qeth_hdr_tso *)qhdr;
-	struct tcphdr *tcph = tcp_hdr(skb);
 	struct iphdr *iph = ip_hdr(skb);
-	struct ipv6hdr *ip6h = ipv6_hdr(skb);
-
-	/*fix header to TSO values ...*/
-	hdr->hdr.hdr.l3.id = QETH_HEADER_TYPE_TSO;
-	/*set values which are fix for the first approach ...*/
-	hdr->ext.hdr_tot_len = (__u16) sizeof(struct qeth_hdr_ext_tso);
-	hdr->ext.imb_hdr_no  = 1;
-	hdr->ext.hdr_type    = 1;
-	hdr->ext.hdr_version = 1;
-	hdr->ext.hdr_len     = 28;
-	/*insert non-fix values */
-	hdr->ext.mss = skb_shinfo(skb)->gso_size;
-	hdr->ext.dg_hdr_len = (__u16)(ip_hdrlen(skb) + tcp_hdrlen(skb));
-	hdr->ext.payload_len = (__u16)(skb->len - hdr->ext.dg_hdr_len -
-				       sizeof(struct qeth_hdr_tso));
-	tcph->check = 0;
-	if (be16_to_cpu(skb->protocol) == ETH_P_IPV6) {
-		ip6h->payload_len = 0;
-		tcph->check = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
-					       0, IPPROTO_TCP, 0);
-	} else {
-		/*OSA want us to set these values ...*/
-		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
-					 0, IPPROTO_TCP, 0);
-		iph->tot_len = 0;
-		iph->check = 0;
-	}
-}
 
-/**
- * qeth_l3_get_elements_no_tso() - find number of SBALEs for skb data for tso
- * @card:			   qeth card structure, to check max. elems.
- * @skb:			   SKB address
- * @extra_elems:		   extra elems needed, to check against max.
- *
- * Returns the number of pages, and thus QDIO buffer elements, needed to cover
- * skb data, including linear part and fragments, but excluding TCP header.
- * (Exclusion of TCP header distinguishes it from qeth_get_elements_no().)
- * Checks if the result plus extra_elems fits under the limit for the card.
- * Returns 0 if it does not.
- * Note: extra_elems is not included in the returned result.
- */
-static int qeth_l3_get_elements_no_tso(struct qeth_card *card,
-			struct sk_buff *skb, int extra_elems)
-{
-	addr_t start = (addr_t)tcp_hdr(skb) + tcp_hdrlen(skb);
-	addr_t end = (addr_t)skb->data + skb_headlen(skb);
-	int elements = qeth_get_elements_for_frags(skb);
-
-	if (start != end)
-		elements += qeth_get_elements_for_range(start, end);
-
-	if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
-		QETH_DBF_MESSAGE(2,
-	"Invalid size of TSO IP packet (Number=%d / Length=%d). Discarded.\n",
-				elements + extra_elems, skb->len);
-		return 0;
+	/* this is safe, IPv6 traffic takes a different path */
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		iph->check = 0;
+	if (skb_is_gso(skb)) {
+		iph->tot_len = 0;
+		tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
+						    iph->daddr, 0);
 	}
-	return elements;
 }
 
-static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
-				struct qeth_qdio_out_q *queue, int ipv,
-				int cast_type)
+static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
+			struct qeth_qdio_out_q *queue, int ipv, int cast_type)
 {
-	const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);
-	unsigned int frame_len, elements;
+	unsigned int hw_hdr_len, proto_len, frame_len, elements;
 	unsigned char eth_hdr[ETH_HLEN];
+	bool is_tso = skb_is_gso(skb);
+	unsigned int data_offset = 0;
 	struct qeth_hdr *hdr = NULL;
 	unsigned int hd_len = 0;
 	int push_len, rc;
 	bool is_sg;
 
+	if (is_tso) {
+		hw_hdr_len = sizeof(struct qeth_hdr_tso);
+		proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb) -
+			    ETH_HLEN;
+	} else {
+		hw_hdr_len = sizeof(struct qeth_hdr);
+		proto_len = 0;
+	}
+
 	/* re-use the L2 header area for the HW header: */
 	rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
 	if (rc)
@@ -2181,28 +2142,37 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 	skb_pull(skb, ETH_HLEN);
 	frame_len = skb->len;
 
-	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, 0,
+	qeth_l3_fixup_headers(skb);
+	push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
 				      &elements);
 	if (push_len < 0)
 		return push_len;
-	if (!push_len) {
-		/* hdr was added discontiguous from skb->data */
-		hd_len = hw_hdr_len;
+	if (is_tso || !push_len) {
+		/* HW header needs its own buffer element. */
+		hd_len = hw_hdr_len + proto_len;
+		data_offset = push_len + proto_len;
 	}
+	memset(hdr, 0, hw_hdr_len);
 
-	if (skb->protocol == htons(ETH_P_AF_IUCV))
+	if (skb->protocol == htons(ETH_P_AF_IUCV)) {
 		qeth_l3_fill_af_iucv_hdr(hdr, skb, frame_len);
-	else
+	} else {
 		qeth_l3_fill_header(card, hdr, skb, ipv, cast_type, frame_len);
+		if (is_tso)
+			qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
+					  frame_len - proto_len, skb,
+					  proto_len);
+	}
 
 	is_sg = skb_is_nonlinear(skb);
 	if (IS_IQD(card)) {
-		rc = qeth_do_send_packet_fast(queue, skb, hdr, 0, hd_len);
+		rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
+					      hd_len);
 	} else {
 		/* TODO: drop skb_orphan() once TX completion is fast enough */
 		skb_orphan(skb);
-		rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len,
-					 elements);
+		rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
+					 hd_len, elements);
 	}
 
 	if (!rc) {
@@ -2210,6 +2180,10 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 			card->perf_stats.buf_elements_sent += elements;
 			if (is_sg)
 				card->perf_stats.sg_skbs_sent++;
+			if (is_tso) {
+				card->perf_stats.large_send_bytes += frame_len;
+				card->perf_stats.large_send_cnt++;
+			}
 		}
 	} else {
 		if (!push_len)
@@ -2224,118 +2198,6 @@ static int qeth_l3_xmit_offload(struct qeth_card *card, struct sk_buff *skb,
 	return rc;
 }
 
-static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
-			struct qeth_qdio_out_q *queue, int ipv, int cast_type)
-{
-	int elements, len, rc;
-	__be16 *tag;
-	struct qeth_hdr *hdr = NULL;
-	int hdr_elements = 0;
-	struct sk_buff *new_skb = NULL;
-	int tx_bytes = skb->len;
-	unsigned int hd_len;
-	bool use_tso, is_sg;
-
-	/* Ignore segment size from skb_is_gso(), 1 page is always used. */
-	use_tso = skb_is_gso(skb) &&
-		  (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4);
-
-	/* create a clone with writeable headroom */
-	new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr_tso) +
-					    VLAN_HLEN);
-	if (!new_skb)
-		return -ENOMEM;
-
-	if (ipv == 4) {
-		skb_pull(new_skb, ETH_HLEN);
-	} else if (skb_vlan_tag_present(new_skb)) {
-		skb_push(new_skb, VLAN_HLEN);
-		skb_copy_to_linear_data(new_skb, new_skb->data + 4, 4);
-		skb_copy_to_linear_data_offset(new_skb, 4,
-					       new_skb->data + 8, 4);
-		skb_copy_to_linear_data_offset(new_skb, 8,
-					       new_skb->data + 12, 4);
-		tag = (__be16 *)(new_skb->data + 12);
-		*tag = cpu_to_be16(ETH_P_8021Q);
-		*(tag + 1) = cpu_to_be16(skb_vlan_tag_get(new_skb));
-	}
-
-	/* fix hardware limitation: as long as we do not have sbal
-	 * chaining we can not send long frag lists
-	 */
-	if ((use_tso && !qeth_l3_get_elements_no_tso(card, new_skb, 1)) ||
-	    (!use_tso && !qeth_get_elements_no(card, new_skb, 0, 0))) {
-		rc = skb_linearize(new_skb);
-
-		if (card->options.performance_stats) {
-			if (rc)
-				card->perf_stats.tx_linfail++;
-			else
-				card->perf_stats.tx_lin++;
-		}
-		if (rc)
-			goto out;
-	}
-
-	if (use_tso) {
-		hdr = skb_push(new_skb, sizeof(struct qeth_hdr_tso));
-		memset(hdr, 0, sizeof(struct qeth_hdr_tso));
-		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
-				    new_skb->len - sizeof(struct qeth_hdr_tso));
-		qeth_tso_fill_header(card, hdr, new_skb);
-		hdr_elements++;
-	} else {
-		hdr = skb_push(new_skb, sizeof(struct qeth_hdr));
-		qeth_l3_fill_header(card, hdr, new_skb, ipv, cast_type,
-				    new_skb->len - sizeof(struct qeth_hdr));
-	}
-
-	elements = use_tso ?
-		   qeth_l3_get_elements_no_tso(card, new_skb, hdr_elements) :
-		   qeth_get_elements_no(card, new_skb, hdr_elements, 0);
-	if (!elements) {
-		rc = -E2BIG;
-		goto out;
-	}
-	elements += hdr_elements;
-
-	if (use_tso) {
-		hd_len = sizeof(struct qeth_hdr_tso) +
-			 ip_hdrlen(new_skb) + tcp_hdrlen(new_skb);
-		len = hd_len;
-	} else {
-		hd_len = 0;
-		len = sizeof(struct qeth_hdr_layer3);
-	}
-
-	if (qeth_hdr_chk_and_bounce(new_skb, &hdr, len)) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	is_sg = skb_is_nonlinear(new_skb);
-	rc = qeth_do_send_packet(card, queue, new_skb, hdr, hd_len, hd_len,
-				 elements);
-out:
-	if (!rc) {
-		if (new_skb != skb)
-			dev_kfree_skb_any(skb);
-		if (card->options.performance_stats) {
-			card->perf_stats.buf_elements_sent += elements;
-			if (is_sg)
-				card->perf_stats.sg_skbs_sent++;
-			if (use_tso) {
-				card->perf_stats.large_send_bytes += tx_bytes;
-				card->perf_stats.large_send_cnt++;
-			}
-		}
-	} else {
-		if (new_skb != skb)
-			dev_kfree_skb_any(new_skb);
-	}
-	return rc;
-}
-
 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 					   struct net_device *dev)
 {
@@ -2355,7 +2217,7 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 			goto tx_drop;
 	}
 
-	if (card->state != CARD_STATE_UP || !card->lan_online) {
+	if (card->state != CARD_STATE_UP) {
 		card->stats.tx_carrier_errors++;
 		goto tx_drop;
 	}
@@ -2371,10 +2233,11 @@ static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
 	}
 	netif_stop_queue(dev);
 
-	if (IS_IQD(card) || (!skb_is_gso(skb) && ipv == 4))
-		rc = qeth_l3_xmit_offload(card, skb, queue, ipv, cast_type);
-	else
+	if (ipv == 4 || IS_IQD(card))
 		rc = qeth_l3_xmit(card, skb, queue, ipv, cast_type);
+	else
+		rc = qeth_xmit(card, skb, queue, ipv, cast_type,
+			       qeth_l3_fill_header);
 
 	if (!rc) {
 		card->stats.tx_packets++;
@@ -2412,7 +2275,10 @@ static int __qeth_l3_open(struct net_device *dev)
 
 	if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 		napi_enable(&card->napi);
+		local_bh_disable();
 		napi_schedule(&card->napi);
+		/* kick-start the NAPI softirq: */
+		local_bh_enable();
 	} else
 		rc = -EIO;
 	return rc;
@@ -2476,6 +2342,15 @@ qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
 	return 0;
 }
 
+static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
+						    struct net_device *dev,
+						    netdev_features_t features)
+{
+	if (qeth_get_ip_version(skb) != 4)
+		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
+	return qeth_features_check(skb, dev, features);
+}
+
 static const struct net_device_ops qeth_l3_netdev_ops = {
 	.ndo_open		= qeth_l3_open,
 	.ndo_stop		= qeth_l3_stop,
@@ -2496,7 +2371,7 @@ static const struct net_device_ops qeth_l3_osa_netdev_ops = {
 	.ndo_stop		= qeth_l3_stop,
 	.ndo_get_stats		= qeth_get_stats,
 	.ndo_start_xmit		= qeth_l3_hard_start_xmit,
-	.ndo_features_check	= qeth_features_check,
+	.ndo_features_check	= qeth_l3_osa_features_check,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= qeth_l3_set_rx_mode,
 	.ndo_do_ioctl		= qeth_do_ioctl,
@@ -2510,6 +2385,7 @@ static const struct net_device_ops qeth_l3_osa_netdev_ops = {
 
 static int qeth_l3_setup_netdev(struct qeth_card *card)
 {
+	unsigned int headroom;
 	int rc;
 
 	if (card->dev->netdev_ops)
@@ -2542,9 +2418,22 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 			card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 			card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 		}
+		if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
+			card->dev->hw_features |= NETIF_F_TSO6;
+			card->dev->vlan_features |= NETIF_F_TSO6;
+		}
+
+		/* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
+		if (card->dev->hw_features & NETIF_F_TSO6)
+			headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
+		else if (card->dev->hw_features & NETIF_F_TSO)
+			headroom = sizeof(struct qeth_hdr_tso);
+		else
+			headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
 	} else if (card->info.type == QETH_CARD_TYPE_IQD) {
 		card->dev->flags |= IFF_NOARP;
 		card->dev->netdev_ops = &qeth_l3_netdev_ops;
+		headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
 
 		rc = qeth_l3_iqd_read_initial_mac(card);
 		if (rc)
@@ -2555,14 +2444,14 @@ static int qeth_l3_setup_netdev(struct qeth_card *card)
 	} else
 		return -ENODEV;
 
+	card->dev->needed_headroom = headroom;
 	card->dev->ethtool_ops = &qeth_l3_ethtool_ops;
-	card->dev->needed_headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
 	card->dev->features |=	NETIF_F_HW_VLAN_CTAG_TX |
 				NETIF_F_HW_VLAN_CTAG_RX |
 				NETIF_F_HW_VLAN_CTAG_FILTER;
 
 	netif_keep_dst(card->dev);
-	if (card->dev->hw_features & NETIF_F_TSO)
+	if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
 		netif_set_gso_max_size(card->dev,
 				       PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
 
@@ -2591,7 +2480,6 @@ static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
 	}
 	hash_init(card->ip_htable);
 	hash_init(card->ip_mc_htable);
-	card->options.layer2 = 0;
 	card->info.hwtrap = 0;
 	return 0;
 }
@@ -2678,10 +2566,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	qeth_l3_recover_ip(card);
-	if (card->lan_online)
-		netif_carrier_on(card->dev);
-	else
-		netif_carrier_off(card->dev);
 
 	qeth_enable_hw_features(card->dev);
 	if (recover_flag == CARD_STATE_RECOVER) {
@@ -2819,9 +2703,6 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
 	struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 	int rc = 0;
 
-	if (gdev->state == CCWGROUP_OFFLINE)
-		goto out;
-
 	if (card->state == CARD_STATE_RECOVER) {
 		rc = __qeth_l3_set_online(card->gdev, 1);
 		if (rc) {
@@ -2831,7 +2712,7 @@ static int qeth_l3_pm_resume(struct ccwgroup_device *gdev)
 		}
 	} else
 		rc = __qeth_l3_set_online(card->gdev, 0);
-out:
+
 	qeth_set_allowed_threads(card, 0xffffffff, 0);
 	netif_device_attach(card->dev);
 	if (rc)