net: powerpc: remove the legacy iSeries ethernet driver

This driver is specific to the PowerPC legcay iSeries platform which is
being removed.

Cc: David Miller <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Stephen Rothwell <[e-mail]>
Acked-by: David S. Miller <[e-mail]>
Signed-off-by: Benjamin Herrenschmidt <[e-mail]>

drivers/net/ethernet/ibm/Kconfig

···
 	  To compile this driver as a module, choose M here. The module will
 	  be called ibmveth.
 
-config ISERIES_VETH
-	tristate "iSeries Virtual Ethernet driver support"
-	depends on PPC_ISERIES
-
 source "drivers/net/ethernet/ibm/emac/Kconfig"
 
 config EHEA

drivers/net/ethernet/ibm/Makefile

···
 #
 
 obj-$(CONFIG_IBMVETH) += ibmveth.o
-obj-$(CONFIG_ISERIES_VETH) += iseries_veth.o
 obj-$(CONFIG_IBM_EMAC) += emac/
 obj-$(CONFIG_EHEA) += ehea/

drivers/net/ethernet/ibm/iseries_veth.c

···
-/* File veth.c created by Kyle A. Lucke on Mon Aug  7 2000. */
-/*
- * IBM eServer iSeries Virtual Ethernet Device Driver
- * Copyright (C) 2001 Kyle A. Lucke ([e-mail]), IBM Corp.
- * Substantially cleaned up by:
- * Copyright (C) 2003 David Gibson <[e-mail]>, IBM Corporation.
- * Copyright (C) 2004-2005 Michael Ellerman, IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- *
- *
- * This module implements the virtual ethernet device for iSeries LPAR
- * Linux.  It uses hypervisor message passing to implement an
- * ethernet-like network device communicating between partitions on
- * the iSeries.
- *
- * The iSeries LPAR hypervisor currently allows for up to 16 different
- * virtual ethernets.  These are all dynamically configurable on
- * OS/400 partitions, but dynamic configuration is not supported under
- * Linux yet.  An ethXX network device will be created for each
- * virtual ethernet this partition is connected to.
- *
- * - This driver is responsible for routing packets to and from other
- *   partitions.  The MAC addresses used by the virtual ethernets
- *   contains meaning and must not be modified.
- *
- * - Having 2 virtual ethernets to the same remote partition DOES NOT
- *   double the available bandwidth.  The 2 devices will share the
- *   available hypervisor bandwidth.
- *
- * - If you send a packet to your own mac address, it will just be
- *   dropped, you won't get it on the receive side.
- *
- * - Multicast is implemented by sending the frame frame to every
- *   other partition.  It is the responsibility of the receiving
- *   partition to filter the addresses desired.
- *
- * Tunable parameters:
- *
- * VETH_NUMBUFFERS: This compile time option defaults to 120.  It
- * controls how much memory Linux will allocate per remote partition
- * it is communicating with.  It can be thought of as the maximum
- * number of packets outstanding to a remote partition at a time.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/mm.h>
-#include <linux/ethtool.h>
-#include <linux/if_ether.h>
-#include <linux/slab.h>
-
-#include <asm/abs_addr.h>
-#include <asm/iseries/mf.h>
-#include <asm/uaccess.h>
-#include <asm/firmware.h>
-#include <asm/iseries/hv_lp_config.h>
-#include <asm/iseries/hv_types.h>
-#include <asm/iseries/hv_lp_event.h>
-#include <asm/iommu.h>
-#include <asm/vio.h>
-
-#undef DEBUG
-
-MODULE_AUTHOR("Kyle Lucke <[e-mail]>");
-MODULE_DESCRIPTION("iSeries Virtual ethernet driver");
-MODULE_LICENSE("GPL");
-
-#define VETH_EVENT_CAP	(0)
-#define VETH_EVENT_FRAMES	(1)
-#define VETH_EVENT_MONITOR	(2)
-#define VETH_EVENT_FRAMES_ACK	(3)
-
-#define VETH_MAX_ACKS_PER_MSG	(20)
-#define VETH_MAX_FRAMES_PER_MSG	(6)
-
-struct veth_frames_data {
-	u32 addr[VETH_MAX_FRAMES_PER_MSG];
-	u16 len[VETH_MAX_FRAMES_PER_MSG];
-	u32 eofmask;
-};
-#define VETH_EOF_SHIFT		(32-VETH_MAX_FRAMES_PER_MSG)
-
-struct veth_frames_ack_data {
-	u16 token[VETH_MAX_ACKS_PER_MSG];
-};
-
-struct veth_cap_data {
-	u8 caps_version;
-	u8 rsvd1;
-	u16 num_buffers;
-	u16 ack_threshold;
-	u16 rsvd2;
-	u32 ack_timeout;
-	u32 rsvd3;
-	u64 rsvd4[3];
-};
-
-struct veth_lpevent {
-	struct HvLpEvent base_event;
-	union {
-		struct veth_cap_data caps_data;
-		struct veth_frames_data frames_data;
-		struct veth_frames_ack_data frames_ack_data;
-	} u;
-
-};
-
-#define DRV_NAME	"iseries_veth"
-#define DRV_VERSION	"2.0"
-
-#define VETH_NUMBUFFERS		(120)
-#define VETH_ACKTIMEOUT 	(1000000) /* microseconds */
-#define VETH_MAX_MCAST		(12)
-
-#define VETH_MAX_MTU		(9000)
-
-#if VETH_NUMBUFFERS < 10
-#define ACK_THRESHOLD 		(1)
-#elif VETH_NUMBUFFERS < 20
-#define ACK_THRESHOLD 		(4)
-#elif VETH_NUMBUFFERS < 40
-#define ACK_THRESHOLD 		(10)
-#else
-#define ACK_THRESHOLD 		(20)
-#endif
-
-#define	VETH_STATE_SHUTDOWN	(0x0001)
-#define VETH_STATE_OPEN		(0x0002)
-#define VETH_STATE_RESET	(0x0004)
-#define VETH_STATE_SENTMON	(0x0008)
-#define VETH_STATE_SENTCAPS	(0x0010)
-#define VETH_STATE_GOTCAPACK	(0x0020)
-#define VETH_STATE_GOTCAPS	(0x0040)
-#define VETH_STATE_SENTCAPACK	(0x0080)
-#define VETH_STATE_READY	(0x0100)
-
-struct veth_msg {
-	struct veth_msg *next;
-	struct veth_frames_data data;
-	int token;
-	int in_use;
-	struct sk_buff *skb;
-	struct device *dev;
-};
-
-struct veth_lpar_connection {
-	HvLpIndex remote_lp;
-	struct delayed_work statemachine_wq;
-	struct veth_msg *msgs;
-	int num_events;
-	struct veth_cap_data local_caps;
-
-	struct kobject kobject;
-	struct timer_list ack_timer;
-
-	struct timer_list reset_timer;
-	unsigned int reset_timeout;
-	unsigned long last_contact;
-	int outstanding_tx;
-
-	spinlock_t lock;
-	unsigned long state;
-	HvLpInstanceId src_inst;
-	HvLpInstanceId dst_inst;
-	struct veth_lpevent cap_event, cap_ack_event;
-	u16 pending_acks[VETH_MAX_ACKS_PER_MSG];
-	u32 num_pending_acks;
-
-	int num_ack_events;
-	struct veth_cap_data remote_caps;
-	u32 ack_timeout;
-
-	struct veth_msg *msg_stack_head;
-};
-
-struct veth_port {
-	struct device *dev;
-	u64 mac_addr;
-	HvLpIndexMap lpar_map;
-
-	/* queue_lock protects the stopped_map and dev's queue. */
-	spinlock_t queue_lock;
-	HvLpIndexMap stopped_map;
-
-	/* mcast_gate protects promiscuous, num_mcast & mcast_addr. */
-	rwlock_t mcast_gate;
-	int promiscuous;
-	int num_mcast;
-	u64 mcast_addr[VETH_MAX_MCAST];
-
-	struct kobject kobject;
-};
-
-static HvLpIndex this_lp;
-static struct veth_lpar_connection *veth_cnx[HVMAXARCHITECTEDLPS]; /* = 0 */
-static struct net_device *veth_dev[HVMAXARCHITECTEDVIRTUALLANS]; /* = 0 */
-
-static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev);
-static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *);
-static void veth_wake_queues(struct veth_lpar_connection *cnx);
-static void veth_stop_queues(struct veth_lpar_connection *cnx);
-static void veth_receive(struct veth_lpar_connection *, struct veth_lpevent *);
-static void veth_release_connection(struct kobject *kobject);
-static void veth_timed_ack(unsigned long ptr);
-static void veth_timed_reset(unsigned long ptr);
-
-/*
- * Utility functions
- */
-
-#define veth_info(fmt, args...) \
-	printk(KERN_INFO DRV_NAME ": " fmt, ## args)
-
-#define veth_error(fmt, args...) \
-	printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args)
-
-#ifdef DEBUG
-#define veth_debug(fmt, args...) \
-	printk(KERN_DEBUG DRV_NAME ": " fmt, ## args)
-#else
-#define veth_debug(fmt, args...) do {} while (0)
-#endif
-
-/* You must hold the connection's lock when you call this function. */
-static inline void veth_stack_push(struct veth_lpar_connection *cnx,
-				   struct veth_msg *msg)
-{
-	msg->next = cnx->msg_stack_head;
-	cnx->msg_stack_head = msg;
-}
-
-/* You must hold the connection's lock when you call this function. */
-static inline struct veth_msg *veth_stack_pop(struct veth_lpar_connection *cnx)
-{
-	struct veth_msg *msg;
-
-	msg = cnx->msg_stack_head;
-	if (msg)
-		cnx->msg_stack_head = cnx->msg_stack_head->next;
-
-	return msg;
-}
-
-/* You must hold the connection's lock when you call this function. */
-static inline int veth_stack_is_empty(struct veth_lpar_connection *cnx)
-{
-	return cnx->msg_stack_head == NULL;
-}
-
-static inline HvLpEvent_Rc
-veth_signalevent(struct veth_lpar_connection *cnx, u16 subtype,
-		 HvLpEvent_AckInd ackind, HvLpEvent_AckType acktype,
-		 u64 token,
-		 u64 data1, u64 data2, u64 data3, u64 data4, u64 data5)
-{
-	return HvCallEvent_signalLpEventFast(cnx->remote_lp,
-					     HvLpEvent_Type_VirtualLan,
-					     subtype, ackind, acktype,
-					     cnx->src_inst,
-					     cnx->dst_inst,
-					     token, data1, data2, data3,
-					     data4, data5);
-}
-
-static inline HvLpEvent_Rc veth_signaldata(struct veth_lpar_connection *cnx,
-					   u16 subtype, u64 token, void *data)
-{
-	u64 *p = (u64 *) data;
-
-	return veth_signalevent(cnx, subtype, HvLpEvent_AckInd_NoAck,
-				HvLpEvent_AckType_ImmediateAck,
-				token, p[0], p[1], p[2], p[3], p[4]);
-}
-
-struct veth_allocation {
-	struct completion c;
-	int num;
-};
-
-static void veth_complete_allocation(void *parm, int number)
-{
-	struct veth_allocation *vc = (struct veth_allocation *)parm;
-
-	vc->num = number;
-	complete(&vc->c);
-}
-
-static int veth_allocate_events(HvLpIndex rlp, int number)
-{
-	struct veth_allocation vc =
-		{ COMPLETION_INITIALIZER_ONSTACK(vc.c), 0 };
-
-	mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan,
-			    sizeof(struct veth_lpevent), number,
-			    &veth_complete_allocation, &vc);
-	wait_for_completion(&vc.c);
-
-	return vc.num;
-}
-
-/*
- * sysfs support
- */
-
-struct veth_cnx_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct veth_lpar_connection *, char *buf);
-	ssize_t (*store)(struct veth_lpar_connection *, const char *buf);
-};
-
-static ssize_t veth_cnx_attribute_show(struct kobject *kobj,
-		struct attribute *attr, char *buf)
-{
-	struct veth_cnx_attribute *cnx_attr;
-	struct veth_lpar_connection *cnx;
-
-	cnx_attr = container_of(attr, struct veth_cnx_attribute, attr);
-	cnx = container_of(kobj, struct veth_lpar_connection, kobject);
-
-	if (!cnx_attr->show)
-		return -EIO;
-
-	return cnx_attr->show(cnx, buf);
-}
-
-#define CUSTOM_CNX_ATTR(_name, _format, _expression)			\
-static ssize_t _name##_show(struct veth_lpar_connection *cnx, char *buf)\
-{									\
-	return sprintf(buf, _format, _expression);			\
-}									\
-struct veth_cnx_attribute veth_cnx_attr_##_name = __ATTR_RO(_name)
-
-#define SIMPLE_CNX_ATTR(_name)	\
-	CUSTOM_CNX_ATTR(_name, "%lu\n", (unsigned long)cnx->_name)
-
-SIMPLE_CNX_ATTR(outstanding_tx);
-SIMPLE_CNX_ATTR(remote_lp);
-SIMPLE_CNX_ATTR(num_events);
-SIMPLE_CNX_ATTR(src_inst);
-SIMPLE_CNX_ATTR(dst_inst);
-SIMPLE_CNX_ATTR(num_pending_acks);
-SIMPLE_CNX_ATTR(num_ack_events);
-CUSTOM_CNX_ATTR(ack_timeout, "%d\n", jiffies_to_msecs(cnx->ack_timeout));
-CUSTOM_CNX_ATTR(reset_timeout, "%d\n", jiffies_to_msecs(cnx->reset_timeout));
-CUSTOM_CNX_ATTR(state, "0x%.4lX\n", cnx->state);
-CUSTOM_CNX_ATTR(last_contact, "%d\n", cnx->last_contact ?
-		jiffies_to_msecs(jiffies - cnx->last_contact) : 0);
-
-#define GET_CNX_ATTR(_name)	(&veth_cnx_attr_##_name.attr)
-
-static struct attribute *veth_cnx_default_attrs[] = {
-	GET_CNX_ATTR(outstanding_tx),
-	GET_CNX_ATTR(remote_lp),
-	GET_CNX_ATTR(num_events),
-	GET_CNX_ATTR(reset_timeout),
-	GET_CNX_ATTR(last_contact),
-	GET_CNX_ATTR(state),
-	GET_CNX_ATTR(src_inst),
-	GET_CNX_ATTR(dst_inst),
-	GET_CNX_ATTR(num_pending_acks),
-	GET_CNX_ATTR(num_ack_events),
-	GET_CNX_ATTR(ack_timeout),
-	NULL
-};
-
-static const struct sysfs_ops veth_cnx_sysfs_ops = {
-		.show = veth_cnx_attribute_show
-};
-
-static struct kobj_type veth_lpar_connection_ktype = {
-	.release	= veth_release_connection,
-	.sysfs_ops	= &veth_cnx_sysfs_ops,
-	.default_attrs	= veth_cnx_default_attrs
-};
-
-struct veth_port_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct veth_port *, char *buf);
-	ssize_t (*store)(struct veth_port *, const char *buf);
-};
-
-static ssize_t veth_port_attribute_show(struct kobject *kobj,
-		struct attribute *attr, char *buf)
-{
-	struct veth_port_attribute *port_attr;
-	struct veth_port *port;
-
-	port_attr = container_of(attr, struct veth_port_attribute, attr);
-	port = container_of(kobj, struct veth_port, kobject);
-
-	if (!port_attr->show)
-		return -EIO;
-
-	return port_attr->show(port, buf);
-}
-
-#define CUSTOM_PORT_ATTR(_name, _format, _expression)			\
-static ssize_t _name##_show(struct veth_port *port, char *buf)		\
-{									\
-	return sprintf(buf, _format, _expression);			\
-}									\
-struct veth_port_attribute veth_port_attr_##_name = __ATTR_RO(_name)
-
-#define SIMPLE_PORT_ATTR(_name)	\
-	CUSTOM_PORT_ATTR(_name, "%lu\n", (unsigned long)port->_name)
-
-SIMPLE_PORT_ATTR(promiscuous);
-SIMPLE_PORT_ATTR(num_mcast);
-CUSTOM_PORT_ATTR(lpar_map, "0x%X\n", port->lpar_map);
-CUSTOM_PORT_ATTR(stopped_map, "0x%X\n", port->stopped_map);
-CUSTOM_PORT_ATTR(mac_addr, "0x%llX\n", port->mac_addr);
-
-#define GET_PORT_ATTR(_name)	(&veth_port_attr_##_name.attr)
-static struct attribute *veth_port_default_attrs[] = {
-	GET_PORT_ATTR(mac_addr),
-	GET_PORT_ATTR(lpar_map),
-	GET_PORT_ATTR(stopped_map),
-	GET_PORT_ATTR(promiscuous),
-	GET_PORT_ATTR(num_mcast),
-	NULL
-};
-
-static const struct sysfs_ops veth_port_sysfs_ops = {
-	.show = veth_port_attribute_show
-};
-
-static struct kobj_type veth_port_ktype = {
-	.sysfs_ops	= &veth_port_sysfs_ops,
-	.default_attrs	= veth_port_default_attrs
-};
-
-/*
- * LPAR connection code
- */
-
-static inline void veth_kick_statemachine(struct veth_lpar_connection *cnx)
-{
-	schedule_delayed_work(&cnx->statemachine_wq, 0);
-}
-
-static void veth_take_cap(struct veth_lpar_connection *cnx,
-			  struct veth_lpevent *event)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cnx->lock, flags);
-	/* Receiving caps may mean the other end has just come up, so
-	 * we need to reload the instance ID of the far end */
-	cnx->dst_inst =
-		HvCallEvent_getTargetLpInstanceId(cnx->remote_lp,
-						  HvLpEvent_Type_VirtualLan);
-
-	if (cnx->state & VETH_STATE_GOTCAPS) {
-		veth_error("Received a second capabilities from LPAR %d.\n",
-			   cnx->remote_lp);
-		event->base_event.xRc = HvLpEvent_Rc_BufferNotAvailable;
-		HvCallEvent_ackLpEvent((struct HvLpEvent *) event);
-	} else {
-		memcpy(&cnx->cap_event, event, sizeof(cnx->cap_event));
-		cnx->state |= VETH_STATE_GOTCAPS;
-		veth_kick_statemachine(cnx);
-	}
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
-			      struct veth_lpevent *event)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cnx->lock, flags);
-	if (cnx->state & VETH_STATE_GOTCAPACK) {
-		veth_error("Received a second capabilities ack from LPAR %d.\n",
-			   cnx->remote_lp);
-	} else {
-		memcpy(&cnx->cap_ack_event, event,
-		       sizeof(cnx->cap_ack_event));
-		cnx->state |= VETH_STATE_GOTCAPACK;
-		veth_kick_statemachine(cnx);
-	}
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-static void veth_take_monitor_ack(struct veth_lpar_connection *cnx,
-				  struct veth_lpevent *event)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cnx->lock, flags);
-	veth_debug("cnx %d: lost connection.\n", cnx->remote_lp);
-
-	/* Avoid kicking the statemachine once we're shutdown.
-	 * It's unnecessary and it could break veth_stop_connection(). */
-
-	if (! (cnx->state & VETH_STATE_SHUTDOWN)) {
-		cnx->state |= VETH_STATE_RESET;
-		veth_kick_statemachine(cnx);
-	}
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-static void veth_handle_ack(struct veth_lpevent *event)
-{
-	HvLpIndex rlp = event->base_event.xTargetLp;
-	struct veth_lpar_connection *cnx = veth_cnx[rlp];
-
-	BUG_ON(! cnx);
-
-	switch (event->base_event.xSubtype) {
-	case VETH_EVENT_CAP:
-		veth_take_cap_ack(cnx, event);
-		break;
-	case VETH_EVENT_MONITOR:
-		veth_take_monitor_ack(cnx, event);
-		break;
-	default:
-		veth_error("Unknown ack type %d from LPAR %d.\n",
-				event->base_event.xSubtype, rlp);
-	}
-}
-
-static void veth_handle_int(struct veth_lpevent *event)
-{
-	HvLpIndex rlp = event->base_event.xSourceLp;
-	struct veth_lpar_connection *cnx = veth_cnx[rlp];
-	unsigned long flags;
-	int i, acked = 0;
-
-	BUG_ON(! cnx);
-
-	switch (event->base_event.xSubtype) {
-	case VETH_EVENT_CAP:
-		veth_take_cap(cnx, event);
-		break;
-	case VETH_EVENT_MONITOR:
-		/* do nothing... this'll hang out here til we're dead,
-		 * and the hypervisor will return it for us. */
-		break;
-	case VETH_EVENT_FRAMES_ACK:
-		spin_lock_irqsave(&cnx->lock, flags);
-
-		for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) {
-			u16 msgnum = event->u.frames_ack_data.token[i];
-
-			if (msgnum < VETH_NUMBUFFERS) {
-				veth_recycle_msg(cnx, cnx->msgs + msgnum);
-				cnx->outstanding_tx--;
-				acked++;
-			}
-		}
-
-		if (acked > 0) {
-			cnx->last_contact = jiffies;
-			veth_wake_queues(cnx);
-		}
-
-		spin_unlock_irqrestore(&cnx->lock, flags);
-		break;
-	case VETH_EVENT_FRAMES:
-		veth_receive(cnx, event);
-		break;
-	default:
-		veth_error("Unknown interrupt type %d from LPAR %d.\n",
-				event->base_event.xSubtype, rlp);
-	}
-}
-
-static void veth_handle_event(struct HvLpEvent *event)
-{
-	struct veth_lpevent *veth_event = (struct veth_lpevent *)event;
-
-	if (hvlpevent_is_ack(event))
-		veth_handle_ack(veth_event);
-	else
-		veth_handle_int(veth_event);
-}
-
-static int veth_process_caps(struct veth_lpar_connection *cnx)
-{
-	struct veth_cap_data *remote_caps = &cnx->remote_caps;
-	int num_acks_needed;
-
-	/* Convert timer to jiffies */
-	cnx->ack_timeout = remote_caps->ack_timeout * HZ / 1000000;
-
-	if ( (remote_caps->num_buffers == 0) ||
-	     (remote_caps->ack_threshold > VETH_MAX_ACKS_PER_MSG) ||
-	     (remote_caps->ack_threshold == 0) ||
-	     (cnx->ack_timeout == 0) ) {
-		veth_error("Received incompatible capabilities from LPAR %d.\n",
-				cnx->remote_lp);
-		return HvLpEvent_Rc_InvalidSubtypeData;
-	}
-
-	num_acks_needed = (remote_caps->num_buffers
-			   / remote_caps->ack_threshold) + 1;
-
-	/* FIXME: locking on num_ack_events? */
-	if (cnx->num_ack_events < num_acks_needed) {
-		int num;
-
-		num = veth_allocate_events(cnx->remote_lp,
-					   num_acks_needed-cnx->num_ack_events);
-		if (num > 0)
-			cnx->num_ack_events += num;
-
-		if (cnx->num_ack_events < num_acks_needed) {
-			veth_error("Couldn't allocate enough ack events "
-					"for LPAR %d.\n", cnx->remote_lp);
-
-			return HvLpEvent_Rc_BufferNotAvailable;
-		}
-	}
-
-
-	return HvLpEvent_Rc_Good;
-}
-
-/* FIXME: The gotos here are a bit dubious */
-static void veth_statemachine(struct work_struct *work)
-{
-	struct veth_lpar_connection *cnx =
-		container_of(work, struct veth_lpar_connection,
-			     statemachine_wq.work);
-	int rlp = cnx->remote_lp;
-	int rc;
-
-	spin_lock_irq(&cnx->lock);
-
- restart:
-	if (cnx->state & VETH_STATE_RESET) {
-		if (cnx->state & VETH_STATE_OPEN)
-			HvCallEvent_closeLpEventPath(cnx->remote_lp,
-						     HvLpEvent_Type_VirtualLan);
-
-		/*
-		 * Reset ack data. This prevents the ack_timer actually
-		 * doing anything, even if it runs one more time when
-		 * we drop the lock below.
-		 */
-		memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
-		cnx->num_pending_acks = 0;
-
-		cnx->state &= ~(VETH_STATE_RESET | VETH_STATE_SENTMON
-				| VETH_STATE_OPEN | VETH_STATE_SENTCAPS
-				| VETH_STATE_GOTCAPACK | VETH_STATE_GOTCAPS
-				| VETH_STATE_SENTCAPACK | VETH_STATE_READY);
-
-		/* Clean up any leftover messages */
-		if (cnx->msgs) {
-			int i;
-			for (i = 0; i < VETH_NUMBUFFERS; ++i)
-				veth_recycle_msg(cnx, cnx->msgs + i);
-		}
-
-		cnx->outstanding_tx = 0;
-		veth_wake_queues(cnx);
-
-		/* Drop the lock so we can do stuff that might sleep or
-		 * take other locks. */
-		spin_unlock_irq(&cnx->lock);
-
-		del_timer_sync(&cnx->ack_timer);
-		del_timer_sync(&cnx->reset_timer);
-
-		spin_lock_irq(&cnx->lock);
-
-		if (cnx->state & VETH_STATE_RESET)
-			goto restart;
-
-		/* Hack, wait for the other end to reset itself. */
-		if (! (cnx->state & VETH_STATE_SHUTDOWN)) {
-			schedule_delayed_work(&cnx->statemachine_wq, 5 * HZ);
-			goto out;
-		}
-	}
-
-	if (cnx->state & VETH_STATE_SHUTDOWN)
-		/* It's all over, do nothing */
-		goto out;
-
-	if ( !(cnx->state & VETH_STATE_OPEN) ) {
-		if (! cnx->msgs || (cnx->num_events < (2 + VETH_NUMBUFFERS)) )
-			goto cant_cope;
-
-		HvCallEvent_openLpEventPath(rlp, HvLpEvent_Type_VirtualLan);
-		cnx->src_inst =
-			HvCallEvent_getSourceLpInstanceId(rlp,
-							  HvLpEvent_Type_VirtualLan);
-		cnx->dst_inst =
-			HvCallEvent_getTargetLpInstanceId(rlp,
-							  HvLpEvent_Type_VirtualLan);
-		cnx->state |= VETH_STATE_OPEN;
-	}
-
-	if ( (cnx->state & VETH_STATE_OPEN) &&
-	     !(cnx->state & VETH_STATE_SENTMON) ) {
-		rc = veth_signalevent(cnx, VETH_EVENT_MONITOR,
-				      HvLpEvent_AckInd_DoAck,
-				      HvLpEvent_AckType_DeferredAck,
-				      0, 0, 0, 0, 0, 0);
-
-		if (rc == HvLpEvent_Rc_Good) {
-			cnx->state |= VETH_STATE_SENTMON;
-		} else {
-			if ( (rc != HvLpEvent_Rc_PartitionDead) &&
-			     (rc != HvLpEvent_Rc_PathClosed) )
-				veth_error("Error sending monitor to LPAR %d, "
-						"rc = %d\n", rlp, rc);
-
-			/* Oh well, hope we get a cap from the other
-			 * end and do better when that kicks us */
-			goto out;
-		}
-	}
-
-	if ( (cnx->state & VETH_STATE_OPEN) &&
-	     !(cnx->state & VETH_STATE_SENTCAPS)) {
-		u64 *rawcap = (u64 *)&cnx->local_caps;
-
-		rc = veth_signalevent(cnx, VETH_EVENT_CAP,
-				      HvLpEvent_AckInd_DoAck,
-				      HvLpEvent_AckType_ImmediateAck,
-				      0, rawcap[0], rawcap[1], rawcap[2],
-				      rawcap[3], rawcap[4]);
-
-		if (rc == HvLpEvent_Rc_Good) {
-			cnx->state |= VETH_STATE_SENTCAPS;
-		} else {
-			if ( (rc != HvLpEvent_Rc_PartitionDead) &&
-			     (rc != HvLpEvent_Rc_PathClosed) )
-				veth_error("Error sending caps to LPAR %d, "
-						"rc = %d\n", rlp, rc);
-
-			/* Oh well, hope we get a cap from the other
-			 * end and do better when that kicks us */
-			goto out;
-		}
-	}
-
-	if ((cnx->state & VETH_STATE_GOTCAPS) &&
-	    !(cnx->state & VETH_STATE_SENTCAPACK)) {
-		struct veth_cap_data *remote_caps = &cnx->remote_caps;
-
-		memcpy(remote_caps, &cnx->cap_event.u.caps_data,
-		       sizeof(*remote_caps));
-
-		spin_unlock_irq(&cnx->lock);
-		rc = veth_process_caps(cnx);
-		spin_lock_irq(&cnx->lock);
-
-		/* We dropped the lock, so recheck for anything which
-		 * might mess us up */
-		if (cnx->state & (VETH_STATE_RESET|VETH_STATE_SHUTDOWN))
-			goto restart;
-
-		cnx->cap_event.base_event.xRc = rc;
-		HvCallEvent_ackLpEvent((struct HvLpEvent *)&cnx->cap_event);
-		if (rc == HvLpEvent_Rc_Good)
-			cnx->state |= VETH_STATE_SENTCAPACK;
-		else
-			goto cant_cope;
-	}
-
-	if ((cnx->state & VETH_STATE_GOTCAPACK) &&
-	    (cnx->state & VETH_STATE_GOTCAPS) &&
-	    !(cnx->state & VETH_STATE_READY)) {
-		if (cnx->cap_ack_event.base_event.xRc == HvLpEvent_Rc_Good) {
-			/* Start the ACK timer */
-			cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
-			add_timer(&cnx->ack_timer);
-			cnx->state |= VETH_STATE_READY;
-		} else {
-			veth_error("Caps rejected by LPAR %d, rc = %d\n",
-					rlp, cnx->cap_ack_event.base_event.xRc);
-			goto cant_cope;
-		}
-	}
-
- out:
-	spin_unlock_irq(&cnx->lock);
-	return;
-
- cant_cope:
-	/* FIXME: we get here if something happens we really can't
-	 * cope with.  The link will never work once we get here, and
-	 * all we can do is not lock the rest of the system up */
-	veth_error("Unrecoverable error on connection to LPAR %d, shutting down"
-			" (state = 0x%04lx)\n", rlp, cnx->state);
-	cnx->state |= VETH_STATE_SHUTDOWN;
-	spin_unlock_irq(&cnx->lock);
-}
-
-static int veth_init_connection(u8 rlp)
-{
-	struct veth_lpar_connection *cnx;
-	struct veth_msg *msgs;
-	int i;
-
-	if ( (rlp == this_lp) ||
-	     ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) )
-		return 0;
-
-	cnx = kzalloc(sizeof(*cnx), GFP_KERNEL);
-	if (! cnx)
-		return -ENOMEM;
-
-	cnx->remote_lp = rlp;
-	spin_lock_init(&cnx->lock);
-	INIT_DELAYED_WORK(&cnx->statemachine_wq, veth_statemachine);
-
-	init_timer(&cnx->ack_timer);
-	cnx->ack_timer.function = veth_timed_ack;
-	cnx->ack_timer.data = (unsigned long) cnx;
-
-	init_timer(&cnx->reset_timer);
-	cnx->reset_timer.function = veth_timed_reset;
-	cnx->reset_timer.data = (unsigned long) cnx;
-	cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000);
-
-	memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks));
-
-	veth_cnx[rlp] = cnx;
-
-	/* This gets us 1 reference, which is held on behalf of the driver
-	 * infrastructure. It's released at module unload. */
-	kobject_init(&cnx->kobject, &veth_lpar_connection_ktype);
-
-	msgs = kcalloc(VETH_NUMBUFFERS, sizeof(struct veth_msg), GFP_KERNEL);
-	if (! msgs) {
-		veth_error("Can't allocate buffers for LPAR %d.\n", rlp);
-		return -ENOMEM;
-	}
-
-	cnx->msgs = msgs;
-
-	for (i = 0; i < VETH_NUMBUFFERS; i++) {
-		msgs[i].token = i;
-		veth_stack_push(cnx, msgs + i);
-	}
-
-	cnx->num_events = veth_allocate_events(rlp, 2 + VETH_NUMBUFFERS);
-
-	if (cnx->num_events < (2 + VETH_NUMBUFFERS)) {
-		veth_error("Can't allocate enough events for LPAR %d.\n", rlp);
-		return -ENOMEM;
-	}
-
-	cnx->local_caps.num_buffers = VETH_NUMBUFFERS;
-	cnx->local_caps.ack_threshold = ACK_THRESHOLD;
-	cnx->local_caps.ack_timeout = VETH_ACKTIMEOUT;
-
-	return 0;
-}
-
-static void veth_stop_connection(struct veth_lpar_connection *cnx)
-{
-	if (!cnx)
-		return;
-
-	spin_lock_irq(&cnx->lock);
-	cnx->state |= VETH_STATE_RESET | VETH_STATE_SHUTDOWN;
-	veth_kick_statemachine(cnx);
-	spin_unlock_irq(&cnx->lock);
-
-	/* ensure the statemachine runs now and waits for its completion */
-	flush_delayed_work_sync(&cnx->statemachine_wq);
-}
-
-static void veth_destroy_connection(struct veth_lpar_connection *cnx)
-{
-	if (!cnx)
-		return;
-
-	if (cnx->num_events > 0)
-		mf_deallocate_lp_events(cnx->remote_lp,
-				      HvLpEvent_Type_VirtualLan,
-				      cnx->num_events,
-				      NULL, NULL);
-	if (cnx->num_ack_events > 0)
-		mf_deallocate_lp_events(cnx->remote_lp,
-				      HvLpEvent_Type_VirtualLan,
-				      cnx->num_ack_events,
-				      NULL, NULL);
-
-	kfree(cnx->msgs);
-	veth_cnx[cnx->remote_lp] = NULL;
-	kfree(cnx);
-}
-
-static void veth_release_connection(struct kobject *kobj)
-{
-	struct veth_lpar_connection *cnx;
-	cnx = container_of(kobj, struct veth_lpar_connection, kobject);
-	veth_stop_connection(cnx);
-	veth_destroy_connection(cnx);
-}
-
-/*
- * net_device code
- */
-
-static int veth_open(struct net_device *dev)
-{
-	netif_start_queue(dev);
-	return 0;
-}
-
-static int veth_close(struct net_device *dev)
-{
-	netif_stop_queue(dev);
-	return 0;
-}
-
-static int veth_change_mtu(struct net_device *dev, int new_mtu)
-{
-	if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU))
-		return -EINVAL;
-	dev->mtu = new_mtu;
-	return 0;
-}
-
-static void veth_set_multicast_list(struct net_device *dev)
-{
-	struct veth_port *port = netdev_priv(dev);
-	unsigned long flags;
-
-	write_lock_irqsave(&port->mcast_gate, flags);
-
-	if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
-			(netdev_mc_count(dev) > VETH_MAX_MCAST)) {
-		port->promiscuous = 1;
-	} else {
-		struct netdev_hw_addr *ha;
-
-		port->promiscuous = 0;
-
-		/* Update table */
-		port->num_mcast = 0;
-
-		netdev_for_each_mc_addr(ha, dev) {
-			u8 *addr = ha->addr;
-			u64 xaddr = 0;
-
-			memcpy(&xaddr, addr, ETH_ALEN);
-			port->mcast_addr[port->num_mcast] = xaddr;
-			port->num_mcast++;
-		}
-	}
-
-	write_unlock_irqrestore(&port->mcast_gate, flags);
-}
-
-static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
-{
-	strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
-	info->driver[sizeof(info->driver) - 1] = '\0';
-	strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
-	info->version[sizeof(info->version) - 1] = '\0';
-}
-
-static int veth_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
-{
-	ecmd->supported = (SUPPORTED_1000baseT_Full
-			  | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
-	ecmd->advertising = (SUPPORTED_1000baseT_Full
-			    | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
-	ecmd->port = PORT_FIBRE;
-	ecmd->transceiver = XCVR_INTERNAL;
-	ecmd->phy_address = 0;
-	ecmd->speed = SPEED_1000;
-	ecmd->duplex = DUPLEX_FULL;
-	ecmd->autoneg = AUTONEG_ENABLE;
-	ecmd->maxtxpkt = 120;
-	ecmd->maxrxpkt = 120;
-	return 0;
-}
-
-static const struct ethtool_ops ops = {
-	.get_drvinfo = veth_get_drvinfo,
-	.get_settings = veth_get_settings,
-	.get_link = ethtool_op_get_link,
-};
-
-static const struct net_device_ops veth_netdev_ops = {
-	.ndo_open		= veth_open,
-	.ndo_stop		= veth_close,
-	.ndo_start_xmit		= veth_start_xmit,
-	.ndo_change_mtu		= veth_change_mtu,
-	.ndo_set_rx_mode	= veth_set_multicast_list,
-	.ndo_set_mac_address	= NULL,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static struct net_device *veth_probe_one(int vlan,
-		struct vio_dev *vio_dev)
-{
-	struct net_device *dev;
-	struct veth_port *port;
-	struct device *vdev = &vio_dev->dev;
-	int i, rc;
-	const unsigned char *mac_addr;
-
-	mac_addr = vio_get_attribute(vio_dev, "local-mac-address", NULL);
-	if (mac_addr == NULL)
-		mac_addr = vio_get_attribute(vio_dev, "mac-address", NULL);
-	if (mac_addr == NULL) {
-		veth_error("Unable to fetch MAC address from device tree.\n");
-		return NULL;
-	}
-
-	dev = alloc_etherdev(sizeof (struct veth_port));
-	if (!dev)
-		return NULL;
-
-	port = netdev_priv(dev);
-
-	spin_lock_init(&port->queue_lock);
-	rwlock_init(&port->mcast_gate);
-	port->stopped_map = 0;
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-		HvLpVirtualLanIndexMap map;
-
-		if (i == this_lp)
-			continue;
-		map = HvLpConfig_getVirtualLanIndexMapForLp(i);
-		if (map & (0x8000 >> vlan))
-			port->lpar_map |= (1 << i);
-	}
-	port->dev = vdev;
-
-	memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
-
-	dev->mtu = VETH_MAX_MTU;
-
-	memcpy(&port->mac_addr, mac_addr, ETH_ALEN);
-
-	dev->netdev_ops = &veth_netdev_ops;
-	SET_ETHTOOL_OPS(dev, &ops);
-
-	SET_NETDEV_DEV(dev, vdev);
-
-	rc = register_netdev(dev);
-	if (rc != 0) {
-		veth_error("Failed registering net device for vlan%d.\n", vlan);
-		free_netdev(dev);
-		return NULL;
-	}
-
-	kobject_init(&port->kobject, &veth_port_ktype);
-	if (0 != kobject_add(&port->kobject, &dev->dev.kobj, "veth_port"))
-		veth_error("Failed adding port for %s to sysfs.\n", dev->name);
-
-	veth_info("%s attached to iSeries vlan %d (LPAR map = 0x%.4X)\n",
-			dev->name, vlan, port->lpar_map);
-
-	return dev;
-}
-
-/*
- * Tx path
- */
-
-static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp,
-				struct net_device *dev)
-{
-	struct veth_lpar_connection *cnx = veth_cnx[rlp];
-	struct veth_port *port = netdev_priv(dev);
-	HvLpEvent_Rc rc;
-	struct veth_msg *msg = NULL;
-	unsigned long flags;
-
-	if (! cnx)
-		return 0;
-
-	spin_lock_irqsave(&cnx->lock, flags);
-
-	if (! (cnx->state & VETH_STATE_READY))
-		goto no_error;
-
-	if ((skb->len - ETH_HLEN) > VETH_MAX_MTU)
-		goto drop;
-
-	msg = veth_stack_pop(cnx);
-	if (! msg)
-		goto drop;
-
-	msg->in_use = 1;
-	msg->skb = skb_get(skb);
-
-	msg->data.addr[0] = dma_map_single(port->dev, skb->data,
-				skb->len, DMA_TO_DEVICE);
-
-	if (dma_mapping_error(port->dev, msg->data.addr[0]))
-		goto recycle_and_drop;
-
-	msg->dev = port->dev;
-	msg->data.len[0] = skb->len;
-	msg->data.eofmask = 1 << VETH_EOF_SHIFT;
-
-	rc = veth_signaldata(cnx, VETH_EVENT_FRAMES, msg->token, &msg->data);
-
-	if (rc != HvLpEvent_Rc_Good)
-		goto recycle_and_drop;
-
-	/* If the timer's not already running, start it now. */
-	if (0 == cnx->outstanding_tx)
-		mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout);
-
-	cnx->last_contact = jiffies;
-	cnx->outstanding_tx++;
-
-	if (veth_stack_is_empty(cnx))
-		veth_stop_queues(cnx);
-
- no_error:
-	spin_unlock_irqrestore(&cnx->lock, flags);
-	return 0;
-
- recycle_and_drop:
-	veth_recycle_msg(cnx, msg);
- drop:
-	spin_unlock_irqrestore(&cnx->lock, flags);
-	return 1;
-}
-
-static void veth_transmit_to_many(struct sk_buff *skb,
-					  HvLpIndexMap lpmask,
-					  struct net_device *dev)
-{
-	int i, success, error;
-
-	success = error = 0;
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-		if ((lpmask & (1 << i)) == 0)
-			continue;
-
-		if (veth_transmit_to_one(skb, i, dev))
-			error = 1;
-		else
-			success = 1;
-	}
-
-	if (error)
-		dev->stats.tx_errors++;
-
-	if (success) {
-		dev->stats.tx_packets++;
-		dev->stats.tx_bytes += skb->len;
-	}
-}
-
-static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	unsigned char *frame = skb->data;
-	struct veth_port *port = netdev_priv(dev);
-	HvLpIndexMap lpmask;
-
-	if (is_unicast_ether_addr(frame)) {
-		/* unicast packet */
-		HvLpIndex rlp = frame[5];
-
-		if ( ! ((1 << rlp) & port->lpar_map) ) {
-			dev_kfree_skb(skb);
-			return NETDEV_TX_OK;
-		}
-
-		lpmask = 1 << rlp;
-	} else {
-		lpmask = port->lpar_map;
-	}
-
-	veth_transmit_to_many(skb, lpmask, dev);
-
-	dev_kfree_skb(skb);
-
-	return NETDEV_TX_OK;
-}
-
-/* You must hold the connection's lock when you call this function. */
-static void veth_recycle_msg(struct veth_lpar_connection *cnx,
-			     struct veth_msg *msg)
-{
-	u32 dma_address, dma_length;
-
-	if (msg->in_use) {
-		msg->in_use = 0;
-		dma_address = msg->data.addr[0];
-		dma_length = msg->data.len[0];
-
-		if (!dma_mapping_error(msg->dev, dma_address))
-			dma_unmap_single(msg->dev, dma_address, dma_length,
-					DMA_TO_DEVICE);
-
-		if (msg->skb) {
-			dev_kfree_skb_any(msg->skb);
-			msg->skb = NULL;
-		}
-
-		memset(&msg->data, 0, sizeof(msg->data));
-		veth_stack_push(cnx, msg);
-	} else if (cnx->state & VETH_STATE_OPEN) {
-		veth_error("Non-pending frame (# %d) acked by LPAR %d.\n",
-				cnx->remote_lp, msg->token);
-	}
-}
-
-static void veth_wake_queues(struct veth_lpar_connection *cnx)
-{
-	int i;
-
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
-		struct net_device *dev = veth_dev[i];
-		struct veth_port *port;
-		unsigned long flags;
-
-		if (! dev)
-			continue;
-
-		port = netdev_priv(dev);
-
-		if (! (port->lpar_map & (1<<cnx->remote_lp)))
-			continue;
-
-		spin_lock_irqsave(&port->queue_lock, flags);
-
-		port->stopped_map &= ~(1 << cnx->remote_lp);
-
-		if (0 == port->stopped_map && netif_queue_stopped(dev)) {
-			veth_debug("cnx %d: woke queue for %s.\n",
-					cnx->remote_lp, dev->name);
-			netif_wake_queue(dev);
-		}
-		spin_unlock_irqrestore(&port->queue_lock, flags);
-	}
-}
-
-static void veth_stop_queues(struct veth_lpar_connection *cnx)
-{
-	int i;
-
-	for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++) {
-		struct net_device *dev = veth_dev[i];
-		struct veth_port *port;
-
-		if (! dev)
-			continue;
-
-		port = netdev_priv(dev);
-
-		/* If this cnx is not on the vlan for this port, continue */
-		if (! (port->lpar_map & (1 << cnx->remote_lp)))
-			continue;
-
-		spin_lock(&port->queue_lock);
-
-		netif_stop_queue(dev);
-		port->stopped_map |= (1 << cnx->remote_lp);
-
-		veth_debug("cnx %d: stopped queue for %s, map = 0x%x.\n",
-				cnx->remote_lp, dev->name, port->stopped_map);
-
-		spin_unlock(&port->queue_lock);
-	}
-}
-
-static void veth_timed_reset(unsigned long ptr)
-{
-	struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr;
-	unsigned long trigger_time, flags;
-
-	/* FIXME is it possible this fires after veth_stop_connection()?
-	 * That would reschedule the statemachine for 5 seconds and probably
-	 * execute it after the module's been unloaded. Hmm. */
-
-	spin_lock_irqsave(&cnx->lock, flags);
-
-	if (cnx->outstanding_tx > 0) {
-		trigger_time = cnx->last_contact + cnx->reset_timeout;
-
-		if (trigger_time < jiffies) {
-			cnx->state |= VETH_STATE_RESET;
-			veth_kick_statemachine(cnx);
-			veth_error("%d packets not acked by LPAR %d within %d "
-					"seconds, resetting.\n",
-					cnx->outstanding_tx, cnx->remote_lp,
-					cnx->reset_timeout / HZ);
-		} else {
-			/* Reschedule the timer */
-			trigger_time = jiffies + cnx->reset_timeout;
-			mod_timer(&cnx->reset_timer, trigger_time);
-		}
-	}
-
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-/*
- * Rx path
- */
-
-static inline int veth_frame_wanted(struct veth_port *port, u64 mac_addr)
-{
-	int wanted = 0;
-	int i;
-	unsigned long flags;
-
-	if ( (mac_addr == port->mac_addr) || (mac_addr == 0xffffffffffff0000) )
-		return 1;
-
-	read_lock_irqsave(&port->mcast_gate, flags);
-
-	if (port->promiscuous) {
-		wanted = 1;
-		goto out;
-	}
-
-	for (i = 0; i < port->num_mcast; ++i) {
-		if (port->mcast_addr[i] == mac_addr) {
-			wanted = 1;
-			break;
-		}
-	}
-
- out:
-	read_unlock_irqrestore(&port->mcast_gate, flags);
-
-	return wanted;
-}
-
-struct dma_chunk {
-	u64 addr;
-	u64 size;
-};
-
-#define VETH_MAX_PAGES_PER_FRAME ( (VETH_MAX_MTU+PAGE_SIZE-2)/PAGE_SIZE + 1 )
-
-static inline void veth_build_dma_list(struct dma_chunk *list,
-				       unsigned char *p, unsigned long length)
-{
-	unsigned long done;
-	int i = 1;
-
-	/* FIXME: skbs are contiguous in real addresses.  Do we
-	 * really need to break it into PAGE_SIZE chunks, or can we do
-	 * it just at the granularity of iSeries real->absolute
-	 * mapping?  Indeed, given the way the allocator works, can we
-	 * count on them being absolutely contiguous? */
-	list[0].addr = iseries_hv_addr(p);
-	list[0].size = min(length,
-			   PAGE_SIZE - ((unsigned long)p & ~PAGE_MASK));
-
-	done = list[0].size;
-	while (done < length) {
-		list[i].addr = iseries_hv_addr(p + done);
-		list[i].size = min(length-done, PAGE_SIZE);
-		done += list[i].size;
-		i++;
-	}
-}
-
-static void veth_flush_acks(struct veth_lpar_connection *cnx)
-{
-	HvLpEvent_Rc rc;
-
-	rc = veth_signaldata(cnx, VETH_EVENT_FRAMES_ACK,
-			     0, &cnx->pending_acks);
-
-	if (rc != HvLpEvent_Rc_Good)
-		veth_error("Failed acking frames from LPAR %d, rc = %d\n",
-				cnx->remote_lp, (int)rc);
-
-	cnx->num_pending_acks = 0;
-	memset(&cnx->pending_acks, 0xff, sizeof(cnx->pending_acks));
-}
-
-static void veth_receive(struct veth_lpar_connection *cnx,
-			 struct veth_lpevent *event)
-{
-	struct veth_frames_data *senddata = &event->u.frames_data;
-	int startchunk = 0;
-	int nchunks;
-	unsigned long flags;
-	HvLpDma_Rc rc;
-
-	do {
-		u16 length = 0;
-		struct sk_buff *skb;
-		struct dma_chunk local_list[VETH_MAX_PAGES_PER_FRAME];
-		struct dma_chunk remote_list[VETH_MAX_FRAMES_PER_MSG];
-		u64 dest;
-		HvLpVirtualLanIndex vlan;
-		struct net_device *dev;
-		struct veth_port *port;
-
-		/* FIXME: do we need this? */
-		memset(local_list, 0, sizeof(local_list));
-		memset(remote_list, 0, sizeof(remote_list));
-
-		/* a 0 address marks the end of the valid entries */
-		if (senddata->addr[startchunk] == 0)
-			break;
-
-		/* make sure that we have at least 1 EOF entry in the
-		 * remaining entries */
-		if (! (senddata->eofmask >> (startchunk + VETH_EOF_SHIFT))) {
-			veth_error("Missing EOF fragment in event "
-					"eofmask = 0x%x startchunk = %d\n",
-					(unsigned)senddata->eofmask,
-					startchunk);
-			break;
-		}
-
-		/* build list of chunks in this frame */
-		nchunks = 0;
-		do {
-			remote_list[nchunks].addr =
-				(u64) senddata->addr[startchunk+nchunks] << 32;
-			remote_list[nchunks].size =
-				senddata->len[startchunk+nchunks];
-			length += remote_list[nchunks].size;
-		} while (! (senddata->eofmask &
-			    (1 << (VETH_EOF_SHIFT + startchunk + nchunks++))));
-
-		/* length == total length of all chunks */
-		/* nchunks == # of chunks in this frame */
-
-		if ((length - ETH_HLEN) > VETH_MAX_MTU) {
-			veth_error("Received oversize frame from LPAR %d "
-					"(length = %d)\n",
-					cnx->remote_lp, length);
-			continue;
-		}
-
-		skb = alloc_skb(length, GFP_ATOMIC);
-		if (!skb)
-			continue;
-
-		veth_build_dma_list(local_list, skb->data, length);
-
-		rc = HvCallEvent_dmaBufList(HvLpEvent_Type_VirtualLan,
-					    event->base_event.xSourceLp,
-					    HvLpDma_Direction_RemoteToLocal,
-					    cnx->src_inst,
-					    cnx->dst_inst,
-					    HvLpDma_AddressType_RealAddress,
-					    HvLpDma_AddressType_TceIndex,
-					    iseries_hv_addr(&local_list),
-					    iseries_hv_addr(&remote_list),
-					    length);
-		if (rc != HvLpDma_Rc_Good) {
-			dev_kfree_skb_irq(skb);
-			continue;
-		}
-
-		vlan = skb->data[9];
-		dev = veth_dev[vlan];
-		if (! dev) {
-			/*
-			 * Some earlier versions of the driver sent
-			 * broadcasts down all connections, even to lpars
-			 * that weren't on the relevant vlan. So ignore
-			 * packets belonging to a vlan we're not on.
-			 * We can also be here if we receive packets while
-			 * the driver is going down, because then dev is NULL.
-			 */
-			dev_kfree_skb_irq(skb);
-			continue;
-		}
-
-		port = netdev_priv(dev);
-		dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000;
-
-		if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) {
-			dev_kfree_skb_irq(skb);
-			continue;
-		}
-		if (! veth_frame_wanted(port, dest)) {
-			dev_kfree_skb_irq(skb);
-			continue;
-		}
-
-		skb_put(skb, length);
-		skb->protocol = eth_type_trans(skb, dev);
-		skb_checksum_none_assert(skb);
-		netif_rx(skb);	/* send it up */
-		dev->stats.rx_packets++;
-		dev->stats.rx_bytes += length;
-	} while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG);
-
-	/* Ack it */
-	spin_lock_irqsave(&cnx->lock, flags);
-	BUG_ON(cnx->num_pending_acks > VETH_MAX_ACKS_PER_MSG);
-
-	cnx->pending_acks[cnx->num_pending_acks++] =
-		event->base_event.xCorrelationToken;
-
-	if ( (cnx->num_pending_acks >= cnx->remote_caps.ack_threshold) ||
-	     (cnx->num_pending_acks >= VETH_MAX_ACKS_PER_MSG) )
-		veth_flush_acks(cnx);
-
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-static void veth_timed_ack(unsigned long ptr)
-{
-	struct veth_lpar_connection *cnx = (struct veth_lpar_connection *) ptr;
-	unsigned long flags;
-
-	/* Ack all the events */
-	spin_lock_irqsave(&cnx->lock, flags);
-	if (cnx->num_pending_acks > 0)
-		veth_flush_acks(cnx);
-
-	/* Reschedule the timer */
-	cnx->ack_timer.expires = jiffies + cnx->ack_timeout;
-	add_timer(&cnx->ack_timer);
-	spin_unlock_irqrestore(&cnx->lock, flags);
-}
-
-static int veth_remove(struct vio_dev *vdev)
-{
-	struct veth_lpar_connection *cnx;
-	struct net_device *dev;
-	struct veth_port *port;
-	int i;
-
-	dev = veth_dev[vdev->unit_address];
-
-	if (! dev)
-		return 0;
-
-	port = netdev_priv(dev);
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-		cnx = veth_cnx[i];
-
-		if (cnx && (port->lpar_map & (1 << i))) {
-			/* Drop our reference to connections on our VLAN */
-			kobject_put(&cnx->kobject);
-		}
-	}
-
-	veth_dev[vdev->unit_address] = NULL;
-	kobject_del(&port->kobject);
-	kobject_put(&port->kobject);
-	unregister_netdev(dev);
-	free_netdev(dev);
-
-	return 0;
-}
-
-static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id)
-{
-	int i = vdev->unit_address;
-	struct net_device *dev;
-	struct veth_port *port;
-
-	dev = veth_probe_one(i, vdev);
-	if (dev == NULL) {
-		veth_remove(vdev);
-		return 1;
-	}
-	veth_dev[i] = dev;
-
-	port = netdev_priv(dev);
-
-	/* Start the state machine on each connection on this vlan. If we're
-	 * the first dev to do so this will commence link negotiation */
-	for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-		struct veth_lpar_connection *cnx;
-
-		if (! (port->lpar_map & (1 << i)))
-			continue;
-
-		cnx = veth_cnx[i];
-		if (!cnx)
-			continue;
-
-		kobject_get(&cnx->kobject);
-		veth_kick_statemachine(cnx);
-	}
-
-	return 0;
-}
-
-/**
- * veth_device_table: Used by vio.c to match devices that we
- * support.
- */
-static struct vio_device_id veth_device_table[] __devinitdata = {
-	{ "network", "IBM,iSeries-l-lan" },
-	{ "", "" }
-};
-MODULE_DEVICE_TABLE(vio, veth_device_table);
-
-static struct vio_driver veth_driver = {
-	.id_table = veth_device_table,
-	.probe = veth_probe,
-	.remove = veth_remove,
-	.driver = {
-		.name = DRV_NAME,
-		.owner = THIS_MODULE,
-	}
-};
-
-/*
- * Module initialization/cleanup
- */
-
-static void __exit veth_module_cleanup(void)
-{
-	int i;
-	struct veth_lpar_connection *cnx;
-
-	/* Disconnect our "irq" to stop events coming from the Hypervisor. */
-	HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan);
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
-		cnx = veth_cnx[i];
-
-		if (!cnx)
-			continue;
-
-		/* Cancel work queued from Hypervisor callbacks */
-		cancel_delayed_work_sync(&cnx->statemachine_wq);
-		/* Remove the connection from sysfs */
-		kobject_del(&cnx->kobject);
-		/* Drop the driver's reference to the connection */
-		kobject_put(&cnx->kobject);
-	}
-
-	/* Unregister the driver, which will close all the netdevs and stop
-	 * the connections when they're no longer referenced. */
-	vio_unregister_driver(&veth_driver);
-}
-module_exit(veth_module_cleanup);
-
-static int __init veth_module_init(void)
-{
-	int i;
-	int rc;
-
-	if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		return -ENODEV;
-
-	this_lp = HvLpConfig_getLpIndex_outline();
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
-		rc = veth_init_connection(i);
-		if (rc != 0)
-			goto error;
-	}
-
-	HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
-				  &veth_handle_event);
-
-	rc = vio_register_driver(&veth_driver);
-	if (rc != 0)
-		goto error;
-
-	for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
-		struct kobject *kobj;
-
-		if (!veth_cnx[i])
-			continue;
-
-		kobj = &veth_cnx[i]->kobject;
-		/* If the add failes, complain but otherwise continue */
-		if (0 != driver_add_kobj(&veth_driver.driver, kobj,
-					"cnx%.2d", veth_cnx[i]->remote_lp))
-			veth_error("cnx %d: Failed adding to sysfs.\n", i);
-	}
-
-	return 0;
-
-error:
-	for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
-		veth_destroy_connection(veth_cnx[i]);
-	}
-
-	return rc;
-}
-module_init(veth_module_init);