tree-wide: fix assorted typos all over the place
[linux-2.6.git] / drivers / net / iseries_veth.c
index 74ee937..8739ba8 100644 (file)
@@ -4,6 +4,7 @@
  * Copyright (C) 2001 Kyle A. Lucke (klucke@us.ibm.com), IBM Corp.
  * Substantially cleaned up by:
  * Copyright (C) 2003 David Gibson <dwg@au1.ibm.com>, 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
@@ -55,9 +56,7 @@
  * number of packets outstanding to a remote partition at a time.
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
-#include <linux/version.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
 #include <linux/ethtool.h>
-#include <asm/iSeries/mf.h>
-#include <asm/iSeries/iSeries_pci.h>
-#include <asm/uaccess.h>
+#include <linux/if_ether.h>
 
-#include <asm/iSeries/HvLpConfig.h>
-#include <asm/iSeries/HvTypes.h>
-#include <asm/iSeries/HvLpEvent.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
 
-#include "iseries_veth.h"
-
 MODULE_AUTHOR("Kyle Lucke <klucke@us.ibm.com>");
 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)
@@ -115,52 +157,59 @@ MODULE_LICENSE("GPL");
 
 struct veth_msg {
        struct veth_msg *next;
-       struct VethFramesData data;
+       struct veth_frames_data data;
        int token;
-       unsigned long in_use;
+       int in_use;
        struct sk_buff *skb;
        struct device *dev;
 };
 
 struct veth_lpar_connection {
        HvLpIndex remote_lp;
-       struct work_struct statemachine_wq;
+       struct delayed_work statemachine_wq;
        struct veth_msg *msgs;
        int num_events;
-       struct VethCapData local_caps;
+       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 VethLpEvent cap_event, cap_ack_event;
+       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 VethCapData remote_caps;
+       struct veth_cap_data remote_caps;
        u32 ack_timeout;
 
-       spinlock_t msg_stack_lock;
        struct veth_msg *msg_stack_head;
 };
 
 struct veth_port {
        struct device *dev;
-       struct net_device_stats stats;
        u64 mac_addr;
        HvLpIndexMap lpar_map;
 
-       spinlock_t pending_gate;
-       struct sk_buff *pending_skb;
-       HvLpIndexMap pending_lpmask;
+       /* 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;
@@ -169,51 +218,56 @@ 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_flush_pending(struct veth_lpar_connection *cnx);
-static void veth_receive(struct veth_lpar_connection *, struct VethLpEvent *);
-static void veth_timed_ack(unsigned long connectionPtr);
+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 "iseries_veth: " fmt, ## args)
+       printk(KERN_INFO DRV_NAME ": " fmt, ## args)
 
 #define veth_error(fmt, args...) \
-       printk(KERN_ERR "iseries_veth: Error: " fmt, ## args)
+       printk(KERN_ERR DRV_NAME ": Error: " fmt, ## args)
 
 #ifdef DEBUG
 #define veth_debug(fmt, args...) \
-       printk(KERN_DEBUG "iseries_veth: " 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)
 {
-       unsigned long flags;
-
-       spin_lock_irqsave(&cnx->msg_stack_lock, flags);
        msg->next = cnx->msg_stack_head;
        cnx->msg_stack_head = msg;
-       spin_unlock_irqrestore(&cnx->msg_stack_lock, flags);
 }
 
+/* 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)
 {
-       unsigned long flags;
        struct veth_msg *msg;
 
-       spin_lock_irqsave(&cnx->msg_stack_lock, flags);
        msg = cnx->msg_stack_head;
        if (msg)
                cnx->msg_stack_head = cnx->msg_stack_head->next;
-       spin_unlock_irqrestore(&cnx->msg_stack_lock, flags);
+
        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,
@@ -254,10 +308,11 @@ static void veth_complete_allocation(void *parm, int number)
 
 static int veth_allocate_events(HvLpIndex rlp, int number)
 {
-       struct veth_allocation vc = { COMPLETION_INITIALIZER(vc.c), 0 };
+       struct veth_allocation vc =
+               { COMPLETION_INITIALIZER_ONSTACK(vc.c), 0 };
 
        mf_allocate_lp_events(rlp, HvLpEvent_Type_VirtualLan,
-                           sizeof(struct VethLpEvent), number,
+                           sizeof(struct veth_lpevent), number,
                            &veth_complete_allocation, &vc);
        wait_for_completion(&vc.c);
 
@@ -265,16 +320,147 @@ static int veth_allocate_events(HvLpIndex rlp, int number)
 }
 
 /*
+ * 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 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 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_work(&cnx->statemachine_wq);
+       schedule_delayed_work(&cnx->statemachine_wq, 0);
 }
 
 static void veth_take_cap(struct veth_lpar_connection *cnx,
-                         struct VethLpEvent *event)
+                         struct veth_lpevent *event)
 {
        unsigned long flags;
 
@@ -299,7 +485,7 @@ static void veth_take_cap(struct veth_lpar_connection *cnx,
 }
 
 static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
-                             struct VethLpEvent *event)
+                             struct veth_lpevent *event)
 {
        unsigned long flags;
 
@@ -309,7 +495,7 @@ static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
                           cnx->remote_lp);
        } else {
                memcpy(&cnx->cap_ack_event, event,
-                      sizeof(&cnx->cap_ack_event));
+                      sizeof(cnx->cap_ack_event));
                cnx->state |= VETH_STATE_GOTCAPACK;
                veth_kick_statemachine(cnx);
        }
@@ -317,7 +503,7 @@ static void veth_take_cap_ack(struct veth_lpar_connection *cnx,
 }
 
 static void veth_take_monitor_ack(struct veth_lpar_connection *cnx,
-                                 struct VethLpEvent *event)
+                                 struct veth_lpevent *event)
 {
        unsigned long flags;
 
@@ -334,7 +520,7 @@ static void veth_take_monitor_ack(struct veth_lpar_connection *cnx,
        spin_unlock_irqrestore(&cnx->lock, flags);
 }
 
-static void veth_handle_ack(struct VethLpEvent *event)
+static void veth_handle_ack(struct veth_lpevent *event)
 {
        HvLpIndex rlp = event->base_event.xTargetLp;
        struct veth_lpar_connection *cnx = veth_cnx[rlp];
@@ -342,10 +528,10 @@ static void veth_handle_ack(struct VethLpEvent *event)
        BUG_ON(! cnx);
 
        switch (event->base_event.xSubtype) {
-       case VethEventTypeCap:
+       case VETH_EVENT_CAP:
                veth_take_cap_ack(cnx, event);
                break;
-       case VethEventTypeMonitor:
+       case VETH_EVENT_MONITOR:
                veth_take_monitor_ack(cnx, event);
                break;
        default:
@@ -354,35 +540,44 @@ static void veth_handle_ack(struct VethLpEvent *event)
        };
 }
 
-static void veth_handle_int(struct VethLpEvent *event)
+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;
+       int i, acked = 0;
 
        BUG_ON(! cnx);
 
        switch (event->base_event.xSubtype) {
-       case VethEventTypeCap:
+       case VETH_EVENT_CAP:
                veth_take_cap(cnx, event);
                break;
-       case VethEventTypeMonitor:
+       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 VethEventTypeFramesAck:
+       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)
+                       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);
-               veth_flush_pending(cnx);
                break;
-       case VethEventTypeFrames:
+       case VETH_EVENT_FRAMES:
                veth_receive(cnx, event);
                break;
        default:
@@ -391,19 +586,19 @@ static void veth_handle_int(struct VethLpEvent *event)
        };
 }
 
-static void veth_handle_event(struct HvLpEvent *event, struct pt_regs *regs)
+static void veth_handle_event(struct HvLpEvent *event)
 {
-       struct VethLpEvent *veth_event = (struct VethLpEvent *)event;
+       struct veth_lpevent *veth_event = (struct veth_lpevent *)event;
 
-       if (event->xFlags.xFunction == HvLpEvent_Function_Ack)
+       if (hvlpevent_is_ack(event))
                veth_handle_ack(veth_event);
-       else if (event->xFlags.xFunction == HvLpEvent_Function_Int)
+       else
                veth_handle_int(veth_event);
 }
 
 static int veth_process_caps(struct veth_lpar_connection *cnx)
 {
-       struct VethCapData *remote_caps = &cnx->remote_caps;
+       struct veth_cap_data *remote_caps = &cnx->remote_caps;
        int num_acks_needed;
 
        /* Convert timer to jiffies */
@@ -443,9 +638,11 @@ static int veth_process_caps(struct veth_lpar_connection *cnx)
 }
 
 /* FIXME: The gotos here are a bit dubious */
-static void veth_statemachine(void *p)
+static void veth_statemachine(struct work_struct *work)
 {
-       struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)p;
+       struct veth_lpar_connection *cnx =
+               container_of(work, struct veth_lpar_connection,
+                            statemachine_wq.work);
        int rlp = cnx->remote_lp;
        int rc;
 
@@ -453,8 +650,6 @@ static void veth_statemachine(void *p)
 
  restart:
        if (cnx->state & VETH_STATE_RESET) {
-               int i;
-
                if (cnx->state & VETH_STATE_OPEN)
                        HvCallEvent_closeLpEventPath(cnx->remote_lp,
                                                     HvLpEvent_Type_VirtualLan);
@@ -473,16 +668,21 @@ static void veth_statemachine(void *p)
                                | VETH_STATE_SENTCAPACK | VETH_STATE_READY);
 
                /* Clean up any leftover messages */
-               if (cnx->msgs)
+               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);
-               veth_flush_pending(cnx);
+               del_timer_sync(&cnx->reset_timer);
 
                spin_lock_irq(&cnx->lock);
 
@@ -516,7 +716,7 @@ static void veth_statemachine(void *p)
 
        if ( (cnx->state & VETH_STATE_OPEN)
             && !(cnx->state & VETH_STATE_SENTMON) ) {
-               rc = veth_signalevent(cnx, VethEventTypeMonitor,
+               rc = veth_signalevent(cnx, VETH_EVENT_MONITOR,
                                      HvLpEvent_AckInd_DoAck,
                                      HvLpEvent_AckType_DeferredAck,
                                      0, 0, 0, 0, 0, 0);
@@ -539,7 +739,7 @@ static void veth_statemachine(void *p)
             && !(cnx->state & VETH_STATE_SENTCAPS)) {
                u64 *rawcap = (u64 *)&cnx->local_caps;
 
-               rc = veth_signalevent(cnx, VethEventTypeCap,
+               rc = veth_signalevent(cnx, VETH_EVENT_CAP,
                                      HvLpEvent_AckInd_DoAck,
                                      HvLpEvent_AckType_ImmediateAck,
                                      0, rawcap[0], rawcap[1], rawcap[2],
@@ -561,7 +761,7 @@ static void veth_statemachine(void *p)
 
        if ((cnx->state & VETH_STATE_GOTCAPS)
            && !(cnx->state & VETH_STATE_SENTCAPACK)) {
-               struct VethCapData *remote_caps = &cnx->remote_caps;
+               struct veth_cap_data *remote_caps = &cnx->remote_caps;
 
                memcpy(remote_caps, &cnx->cap_event.u.caps_data,
                       sizeof(*remote_caps));
@@ -622,30 +822,38 @@ static int veth_init_connection(u8 rlp)
             || ! HvLpConfig_doLpsCommunicateOnVirtualLan(this_lp, rlp) )
                return 0;
 
-       cnx = kmalloc(sizeof(*cnx), GFP_KERNEL);
+       cnx = kzalloc(sizeof(*cnx), GFP_KERNEL);
        if (! cnx)
                return -ENOMEM;
-       memset(cnx, 0, sizeof(*cnx));
 
        cnx->remote_lp = rlp;
        spin_lock_init(&cnx->lock);
-       INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx);
+       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;
 
-       msgs = kmalloc(VETH_NUMBUFFERS * sizeof(struct veth_msg), GFP_KERNEL);
+       /* 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;
-       memset(msgs, 0, VETH_NUMBUFFERS * sizeof(struct veth_msg));
-       spin_lock_init(&cnx->msg_stack_lock);
 
        for (i = 0; i < VETH_NUMBUFFERS; i++) {
                msgs[i].token = i;
@@ -666,11 +874,9 @@ static int veth_init_connection(u8 rlp)
        return 0;
 }
 
-static void veth_stop_connection(u8 rlp)
+static void veth_stop_connection(struct veth_lpar_connection *cnx)
 {
-       struct veth_lpar_connection *cnx = veth_cnx[rlp];
-
-       if (! cnx)
+       if (!cnx)
                return;
 
        spin_lock_irq(&cnx->lock);
@@ -689,6 +895,12 @@ static void veth_stop_connection(u8 rlp)
 
        /* Wait for the state machine to run. */
        flush_scheduled_work();
+}
+
+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,
@@ -700,18 +912,18 @@ static void veth_stop_connection(u8 rlp)
                                      HvLpEvent_Type_VirtualLan,
                                      cnx->num_ack_events,
                                      NULL, NULL);
-}
-
-static void veth_destroy_connection(u8 rlp)
-{
-       struct veth_lpar_connection *cnx = veth_cnx[rlp];
-
-       if (! cnx)
-               return;
 
        kfree(cnx->msgs);
+       veth_cnx[cnx->remote_lp] = NULL;
        kfree(cnx);
-       veth_cnx[rlp] = NULL;
+}
+
+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);
 }
 
 /*
@@ -720,9 +932,6 @@ static void veth_destroy_connection(u8 rlp)
 
 static int veth_open(struct net_device *dev)
 {
-       struct veth_port *port = (struct veth_port *) dev->priv;
-
-       memset(&port->stats, 0, sizeof (port->stats));
        netif_start_queue(dev);
        return 0;
 }
@@ -733,13 +942,6 @@ static int veth_close(struct net_device *dev)
        return 0;
 }
 
-static struct net_device_stats *veth_get_stats(struct net_device *dev)
-{
-       struct veth_port *port = (struct veth_port *) dev->priv;
-
-       return &port->stats;
-}
-
 static int veth_change_mtu(struct net_device *dev, int new_mtu)
 {
        if ((new_mtu < 68) || (new_mtu > VETH_MAX_MTU))
@@ -750,7 +952,7 @@ static int veth_change_mtu(struct net_device *dev, int new_mtu)
 
 static void veth_set_multicast_list(struct net_device *dev)
 {
-       struct veth_port *port = (struct veth_port *) dev->priv;
+       struct veth_port *port = netdev_priv(dev);
        unsigned long flags;
 
        write_lock_irqsave(&port->mcast_gate, flags);
@@ -785,9 +987,10 @@ static void veth_set_multicast_list(struct net_device *dev)
 
 static void veth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
-       strncpy(info->driver, "veth", sizeof(info->driver) - 1);
+       strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
        info->driver[sizeof(info->driver) - 1] = '\0';
-       strncpy(info->version, "1.0", sizeof(info->version) - 1);
+       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)
@@ -812,60 +1015,38 @@ static u32 veth_get_link(struct net_device *dev)
        return 1;
 }
 
-static struct ethtool_ops ops = {
+static const struct ethtool_ops ops = {
        .get_drvinfo = veth_get_drvinfo,
        .get_settings = veth_get_settings,
        .get_link = veth_get_link,
 };
 
-static void veth_tx_timeout(struct net_device *dev)
-{
-       struct veth_port *port = (struct veth_port *)dev->priv;
-       struct net_device_stats *stats = &port->stats;
-       unsigned long flags;
-       int i;
-
-       stats->tx_errors++;
-
-       spin_lock_irqsave(&port->pending_gate, flags);
-
-       if (!port->pending_lpmask) {
-               spin_unlock_irqrestore(&port->pending_gate, flags);
-               return;
-       }
-
-       printk(KERN_WARNING "%s: Tx timeout!  Resetting lp connections: %08x\n",
-              dev->name, port->pending_lpmask);
-
-       for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
-               struct veth_lpar_connection *cnx = veth_cnx[i];
-
-               if (! (port->pending_lpmask & (1<<i)))
-                       continue;
-
-               /* If we're pending on it, we must be connected to it,
-                * so we should certainly have a structure for it. */
-               BUG_ON(! cnx);
-
-               /* Theoretically we could be kicking a connection
-                * which doesn't deserve it, but in practice if we've
-                * had a Tx timeout, the pending_lpmask will have
-                * exactly one bit set - the connection causing the
-                * problem. */
-               spin_lock(&cnx->lock);
-               cnx->state |= VETH_STATE_RESET;
-               veth_kick_statemachine(cnx);
-               spin_unlock(&cnx->lock);
-       }
-
-       spin_unlock_irqrestore(&port->pending_gate, flags);
-}
+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_multicast_list = veth_set_multicast_list,
+       .ndo_set_mac_address    = NULL,
+       .ndo_validate_addr      = eth_validate_addr,
+};
 
-static struct net_device * __init veth_probe_one(int vlan, struct device *vdev)
+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) {
@@ -873,10 +1054,11 @@ static struct net_device * __init veth_probe_one(int vlan, struct device *vdev)
                return NULL;
        }
 
-       port = (struct veth_port *) dev->priv;
+       port = netdev_priv(dev);
 
-       spin_lock_init(&port->pending_gate);
+       spin_lock_init(&port->queue_lock);
        rwlock_init(&port->mcast_gate);
+       port->stopped_map = 0;
 
        for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
                HvLpVirtualLanIndexMap map;
@@ -889,29 +1071,15 @@ static struct net_device * __init veth_probe_one(int vlan, struct device *vdev)
        }
        port->dev = vdev;
 
-       dev->dev_addr[0] = 0x02;
-       dev->dev_addr[1] = 0x01;
-       dev->dev_addr[2] = 0xff;
-       dev->dev_addr[3] = vlan;
-       dev->dev_addr[4] = 0xff;
-       dev->dev_addr[5] = this_lp;
+       memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
 
        dev->mtu = VETH_MAX_MTU;
 
-       memcpy(&port->mac_addr, dev->dev_addr, 6);
+       memcpy(&port->mac_addr, mac_addr, ETH_ALEN);
 
-       dev->open = veth_open;
-       dev->hard_start_xmit = veth_start_xmit;
-       dev->stop = veth_close;
-       dev->get_stats = veth_get_stats;
-       dev->change_mtu = veth_change_mtu;
-       dev->set_mac_address = NULL;
-       dev->set_multicast_list = veth_set_multicast_list;
+       dev->netdev_ops = &veth_netdev_ops;
        SET_ETHTOOL_OPS(dev, &ops);
 
-       dev->watchdog_timeo = 2 * (VETH_ACKTIMEOUT * HZ / 1000000);
-       dev->tx_timeout = veth_tx_timeout;
-
        SET_NETDEV_DEV(dev, vdev);
 
        rc = register_netdev(dev);
@@ -921,6 +1089,10 @@ static struct net_device * __init veth_probe_one(int vlan, struct device *vdev)
                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);
 
@@ -935,100 +1107,96 @@ 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 = (struct veth_port *) dev->priv;
+       struct veth_port *port = netdev_priv(dev);
        HvLpEvent_Rc rc;
-       u32 dma_address, dma_length;
        struct veth_msg *msg = NULL;
-       int err = 0;
        unsigned long flags;
 
-       if (! cnx) {
-               port->stats.tx_errors++;
-               dev_kfree_skb(skb);
+       if (! cnx)
                return 0;
-       }
 
        spin_lock_irqsave(&cnx->lock, flags);
 
        if (! (cnx->state & VETH_STATE_READY))
-               goto drop;
+               goto no_error;
 
-       if ((skb->len - 14) > VETH_MAX_MTU)
+       if ((skb->len - ETH_HLEN) > VETH_MAX_MTU)
                goto drop;
 
        msg = veth_stack_pop(cnx);
-
-       if (! msg) {
-               err = 1;
+       if (! msg)
                goto drop;
-       }
 
-       dma_length = skb->len;
-       dma_address = dma_map_single(port->dev, skb->data,
-                                    dma_length, DMA_TO_DEVICE);
+       msg->in_use = 1;
+       msg->skb = skb_get(skb);
 
-       if (dma_mapping_error(dma_address))
+       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;
 
-       /* Is it really necessary to check the length and address
-        * fields of the first entry here? */
-       msg->skb = skb;
        msg->dev = port->dev;
-       msg->data.addr[0] = dma_address;
-       msg->data.len[0] = dma_length;
+       msg->data.len[0] = skb->len;
        msg->data.eofmask = 1 << VETH_EOF_SHIFT;
-       set_bit(0, &(msg->in_use));
-       rc = veth_signaldata(cnx, VethEventTypeFrames, msg->token, &msg->data);
+
+       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:
-       msg->skb = NULL;
-       /* need to set in use to make veth_recycle_msg in case this
-        * was a mapping failure */
-       set_bit(0, &msg->in_use);
        veth_recycle_msg(cnx, msg);
  drop:
-       port->stats.tx_errors++;
-       dev_kfree_skb(skb);
        spin_unlock_irqrestore(&cnx->lock, flags);
-       return err;
+       return 1;
 }
 
-static HvLpIndexMap veth_transmit_to_many(struct sk_buff *skb,
+static void veth_transmit_to_many(struct sk_buff *skb,
                                          HvLpIndexMap lpmask,
                                          struct net_device *dev)
 {
-       struct veth_port *port = (struct veth_port *) dev->priv;
-       int i;
-       int rc;
+       int i, success, error;
+
+       success = error = 0;
 
        for (i = 0; i < HVMAXARCHITECTEDLPS; i++) {
                if ((lpmask & (1 << i)) == 0)
                        continue;
 
-               rc = veth_transmit_to_one(skb_get(skb), i, dev);
-               if (! rc)
-                       lpmask &= ~(1<<i);
+               if (veth_transmit_to_one(skb, i, dev))
+                       error = 1;
+               else
+                       success = 1;
        }
 
-       if (! lpmask) {
-               port->stats.tx_packets++;
-               port->stats.tx_bytes += skb->len;
-       }
+       if (error)
+               dev->stats.tx_errors++;
 
-       return lpmask;
+       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 = (struct veth_port *) dev->priv;
-       unsigned long flags;
+       struct veth_port *port = netdev_priv(dev);
        HvLpIndexMap lpmask;
 
        if (! (frame[0] & 0x01)) {
@@ -1037,7 +1205,7 @@ static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
                if ( ! ((1 << rlp) & port->lpar_map) ) {
                        dev_kfree_skb(skb);
-                       return 0;
+                       return NETDEV_TX_OK;
                }
 
                lpmask = 1 << rlp;
@@ -1045,44 +1213,27 @@ static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev)
                lpmask = port->lpar_map;
        }
 
-       spin_lock_irqsave(&port->pending_gate, flags);
-
-       lpmask = veth_transmit_to_many(skb, lpmask, dev);
+       veth_transmit_to_many(skb, lpmask, dev);
 
-       dev->trans_start = jiffies;
-
-       if (! lpmask) {
-               dev_kfree_skb(skb);
-       } else {
-               if (port->pending_skb) {
-                       veth_error("%s: TX while skb was pending!\n",
-                                  dev->name);
-                       dev_kfree_skb(skb);
-                       spin_unlock_irqrestore(&port->pending_gate, flags);
-                       return 1;
-               }
-
-               port->pending_skb = skb;
-               port->pending_lpmask = lpmask;
-               netif_stop_queue(dev);
-       }
-
-       spin_unlock_irqrestore(&port->pending_gate, flags);
+       dev_kfree_skb(skb);
 
-       return 0;
+       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 (test_and_clear_bit(0, &msg->in_use)) {
+       if (msg->in_use) {
+               msg->in_use = 0;
                dma_address = msg->data.addr[0];
                dma_length = msg->data.len[0];
 
-               dma_unmap_single(msg->dev, dma_address, dma_length,
-                                DMA_TO_DEVICE);
+               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);
@@ -1097,9 +1248,10 @@ static void veth_recycle_msg(struct veth_lpar_connection *cnx,
        }
 }
 
-static void veth_flush_pending(struct veth_lpar_connection *cnx)
+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;
@@ -1108,25 +1260,82 @@ static void veth_flush_pending(struct veth_lpar_connection *cnx)
                if (! dev)
                        continue;
 
-               port = (struct veth_port *)dev->priv;
+               port = netdev_priv(dev);
 
                if (! (port->lpar_map & (1<<cnx->remote_lp)))
                        continue;
 
-               spin_lock_irqsave(&port->pending_gate, flags);
-               if (port->pending_skb) {
-                       port->pending_lpmask =
-                               veth_transmit_to_many(port->pending_skb,
-                                                     port->pending_lpmask,
-                                                     dev);
-                       if (! port->pending_lpmask) {
-                               dev_kfree_skb_any(port->pending_skb);
-                               port->pending_skb = NULL;
-                               netif_wake_queue(dev);
-                       }
+               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(&port->pending_gate, flags);
        }
+
+       spin_unlock_irqrestore(&cnx->lock, flags);
 }
 
 /*
@@ -1175,18 +1384,18 @@ static inline void veth_build_dma_list(struct dma_chunk *list,
        unsigned long done;
        int i = 1;
 
-       /* FIXME: skbs are continguous in real addresses.  Do we
+       /* 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].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].addr = iseries_hv_addr(p + done);
                list[i].size = min(length-done, PAGE_SIZE);
                done += list[i].size;
                i++;
@@ -1197,7 +1406,7 @@ static void veth_flush_acks(struct veth_lpar_connection *cnx)
 {
        HvLpEvent_Rc rc;
 
-       rc = veth_signaldata(cnx, VethEventTypeFramesAck,
+       rc = veth_signaldata(cnx, VETH_EVENT_FRAMES_ACK,
                             0, &cnx->pending_acks);
 
        if (rc != HvLpEvent_Rc_Good)
@@ -1209,9 +1418,9 @@ static void veth_flush_acks(struct veth_lpar_connection *cnx)
 }
 
 static void veth_receive(struct veth_lpar_connection *cnx,
-                        struct VethLpEvent *event)
+                        struct veth_lpevent *event)
 {
-       struct VethFramesData *senddata = &event->u.frames_data;
+       struct veth_frames_data *senddata = &event->u.frames_data;
        int startchunk = 0;
        int nchunks;
        unsigned long flags;
@@ -1279,8 +1488,8 @@ static void veth_receive(struct veth_lpar_connection *cnx,
                                            cnx->dst_inst,
                                            HvLpDma_AddressType_RealAddress,
                                            HvLpDma_AddressType_TceIndex,
-                                           ISERIES_HV_ADDR(&local_list),
-                                           ISERIES_HV_ADDR(&remote_list),
+                                           iseries_hv_addr(&local_list),
+                                           iseries_hv_addr(&remote_list),
                                            length);
                if (rc != HvLpDma_Rc_Good) {
                        dev_kfree_skb_irq(skb);
@@ -1302,7 +1511,7 @@ static void veth_receive(struct veth_lpar_connection *cnx,
                        continue;
                }
 
-               port = (struct veth_port *)dev->priv;
+               port = netdev_priv(dev);
                dest = *((u64 *) skb->data) & 0xFFFFFFFFFFFF0000;
 
                if ((vlan > HVMAXARCHITECTEDVIRTUALLANS) || !port) {
@@ -1315,12 +1524,11 @@ static void veth_receive(struct veth_lpar_connection *cnx,
                }
 
                skb_put(skb, length);
-               skb->dev = dev;
                skb->protocol = eth_type_trans(skb, dev);
                skb->ip_summed = CHECKSUM_NONE;
                netif_rx(skb);  /* send it up */
-               port->stats.rx_packets++;
-               port->stats.rx_bytes += length;
+               dev->stats.rx_packets++;
+               dev->stats.rx_bytes += length;
        } while (startchunk += nchunks, startchunk < VETH_MAX_FRAMES_PER_MSG);
 
        /* Ack it */
@@ -1355,15 +1563,33 @@ static void veth_timed_ack(unsigned long ptr)
 
 static int veth_remove(struct vio_dev *vdev)
 {
-       int i = vdev->unit_address;
+       struct veth_lpar_connection *cnx;
        struct net_device *dev;
+       struct veth_port *port;
+       int i;
 
-       dev = veth_dev[i];
-       if (dev != NULL) {
-               veth_dev[i] = NULL;
-               unregister_netdev(dev);
-               free_netdev(dev);
+       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;
 }
 
@@ -1371,19 +1597,32 @@ 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->dev);
+       dev = veth_probe_one(i, vdev);
        if (dev == NULL) {
                veth_remove(vdev);
                return 1;
        }
        veth_dev[i] = dev;
 
-       /* Start the state machine on each connection, to commence
-        * link negotiation */
-       for (i = 0; i < HVMAXARCHITECTEDLPS; i++)
-               if (veth_cnx[i])
-                       veth_kick_statemachine(veth_cnx[i]);
+       port = (struct veth_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;
 }
@@ -1393,69 +1632,97 @@ static int veth_probe(struct vio_dev *vdev, const struct vio_device_id *id)
  * support.
  */
 static struct vio_device_id veth_device_table[] __devinitdata = {
-       { "vlan", "" },
+       { "network", "IBM,iSeries-l-lan" },
        { "", "" }
 };
 MODULE_DEVICE_TABLE(vio, veth_device_table);
 
 static struct vio_driver veth_driver = {
-       .name = "iseries_veth",
        .id_table = veth_device_table,
        .probe = veth_probe,
-       .remove = veth_remove
+       .remove = veth_remove,
+       .driver = {
+               .name = DRV_NAME,
+               .owner = THIS_MODULE,
+       }
 };
 
 /*
  * Module initialization/cleanup
  */
 
-void __exit veth_module_cleanup(void)
+static void __exit veth_module_cleanup(void)
 {
        int i;
+       struct veth_lpar_connection *cnx;
 
-       /* Stop the queues first to stop any new packets being sent. */
-       for (i = 0; i < HVMAXARCHITECTEDVIRTUALLANS; i++)
-               if (veth_dev[i])
-                       netif_stop_queue(veth_dev[i]);
-
-       /* Stop the connections before we unregister the driver. This
-        * ensures there's no skbs lying around holding the device open. */
-       for (i = 0; i < HVMAXARCHITECTEDLPS; ++i)
-               veth_stop_connection(i);
-
+       /* Disconnect our "irq" to stop events coming from the Hypervisor. */
        HvLpEvent_unregisterHandler(HvLpEvent_Type_VirtualLan);
 
-       /* Hypervisor callbacks may have scheduled more work while we
-        * were stoping connections. Now that we've disconnected from
-        * the hypervisor make sure everything's finished. */
+       /* Make sure any work queued from Hypervisor callbacks is finished. */
        flush_scheduled_work();
 
-       vio_unregister_driver(&veth_driver);
+       for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
+               cnx = veth_cnx[i];
 
-       for (i = 0; i < HVMAXARCHITECTEDLPS; ++i)
-               veth_destroy_connection(i);
+               if (!cnx)
+                       continue;
 
+               /* 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);
 
-int __init veth_module_init(void)
+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) {
-                       veth_module_cleanup();
-                       return rc;
-               }
+               if (rc != 0)
+                       goto error;
        }
 
        HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
                                  &veth_handle_event);
 
-       return vio_register_driver(&veth_driver);
+       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);