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Date:	Wed, 30 Apr 2008 22:46:24 +0530
From:	Ramachandra K <ramachandra.kuchimanchi@...gic.com>
To:	rdreier@...co.com, general@...ts.openfabrics.org,
	netdev@...r.kernel.org
Cc:	amar.mudrankit@...gic.com, poornima.kamath@...gic.com
Subject: [PATCH 01/13] QLogic VNIC: Driver - netdev implementation

From: Ramachandra K <ramachandra.kuchimanchi@...gic.com>

QLogic Virtual NIC Driver. This patch implements netdev registration,
netdev functions and state maintenance of the QLogic Virtual NIC
corresponding to the various events associated with the QLogic Ethernet 
Virtual I/O Controller (EVIC/VEx) connection.

Signed-off-by: Poornima Kamath <poornima.kamath@...gic.com>
Signed-off-by: Amar Mudrankit <amar.mudrankit@...gic.com>
---

 drivers/infiniband/ulp/qlgc_vnic/vnic_main.c | 1052 ++++++++++++++++++++++++++
 drivers/infiniband/ulp/qlgc_vnic/vnic_main.h |  167 ++++
 2 files changed, 1219 insertions(+), 0 deletions(-)
 create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
 create mode 100644 drivers/infiniband/ulp/qlgc_vnic/vnic_main.h

diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
new file mode 100644
index 0000000..393c79a
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.c
@@ -0,0 +1,1052 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/completion.h>
+
+#include <rdma/ib_cache.h>
+
+#include "vnic_util.h"
+#include "vnic_main.h"
+#include "vnic_netpath.h"
+#include "vnic_viport.h"
+#include "vnic_ib.h"
+#include "vnic_stats.h"
+
+#define MODULEVERSION "1.3.0.0.4"
+#define MODULEDETAILS	\
+		"QLogic Corp. Virtual NIC (VNIC) driver version " MODULEVERSION
+
+MODULE_AUTHOR("QLogic Corp.");
+MODULE_DESCRIPTION(MODULEDETAILS);
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_SUPPORTED_DEVICE("QLogic Ethernet Virtual I/O Controller");
+
+u32 vnic_debug;
+
+module_param(vnic_debug, uint, 0444);
+MODULE_PARM_DESC(vnic_debug, "Enable debug tracing if > 0");
+
+LIST_HEAD(vnic_list);
+
+static DECLARE_WAIT_QUEUE_HEAD(vnic_npevent_queue);
+static LIST_HEAD(vnic_npevent_list);
+static DECLARE_COMPLETION(vnic_npevent_thread_exit);
+static spinlock_t vnic_npevent_list_lock;
+static struct task_struct *vnic_npevent_thread;
+static int vnic_npevent_thread_end;
+
+
+void vnic_connected(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_connected()\n");
+	if (netpath->second_bias)
+		vnic_npevent_queue_evt(netpath, VNIC_SECNP_CONNECTED);
+	else
+		vnic_npevent_queue_evt(netpath, VNIC_PRINP_CONNECTED);
+
+	vnic_connected_stats(vnic);
+}
+
+void vnic_disconnected(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_disconnected()\n");
+	if (netpath->second_bias)
+		vnic_npevent_queue_evt(netpath, VNIC_SECNP_DISCONNECTED);
+	else
+		vnic_npevent_queue_evt(netpath, VNIC_PRINP_DISCONNECTED);
+}
+
+void vnic_link_up(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_link_up()\n");
+	if (netpath->second_bias)
+		vnic_npevent_queue_evt(netpath, VNIC_SECNP_LINKUP);
+	else
+		vnic_npevent_queue_evt(netpath, VNIC_PRINP_LINKUP);
+}
+
+void vnic_link_down(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_link_down()\n");
+	if (netpath->second_bias)
+		vnic_npevent_queue_evt(netpath, VNIC_SECNP_LINKDOWN);
+	else
+		vnic_npevent_queue_evt(netpath, VNIC_PRINP_LINKDOWN);
+}
+
+void vnic_stop_xmit(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_stop_xmit()\n");
+	if (netpath == vnic->current_path) {
+		if (vnic->xmit_started) {
+			netif_stop_queue(vnic->netdevice);
+			vnic->xmit_started = 0;
+		}
+
+		vnic_stop_xmit_stats(vnic);
+	}
+}
+
+void vnic_restart_xmit(struct vnic *vnic, struct netpath *netpath)
+{
+	VNIC_FUNCTION("vnic_restart_xmit()\n");
+	if (netpath == vnic->current_path) {
+		if (!vnic->xmit_started) {
+			netif_wake_queue(vnic->netdevice);
+			vnic->xmit_started = 1;
+		}
+
+		vnic_restart_xmit_stats(vnic);
+	}
+}
+
+void vnic_recv_packet(struct vnic *vnic, struct netpath *netpath,
+		      struct sk_buff *skb)
+{
+	VNIC_FUNCTION("vnic_recv_packet()\n");
+	if ((netpath != vnic->current_path) || !vnic->open) {
+		VNIC_INFO("tossing packet\n");
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	vnic->netdevice->last_rx = jiffies;
+	skb->dev = vnic->netdevice;
+	skb->protocol = eth_type_trans(skb, skb->dev);
+	if (!vnic->config->use_rx_csum)
+		skb->ip_summed = CHECKSUM_NONE;
+	netif_rx(skb);
+	vnic_recv_pkt_stats(vnic);
+}
+
+static struct net_device_stats *vnic_get_stats(struct net_device *device)
+{
+	struct vnic *vnic;
+	struct netpath *np;
+
+	VNIC_FUNCTION("vnic_get_stats()\n");
+	vnic = (struct vnic *)device->priv;
+
+	np = vnic->current_path;
+	if (np && np->viport && !np->cleanup_started)
+		viport_get_stats(np->viport, &vnic->stats);
+	return &vnic->stats;
+}
+
+static int vnic_open(struct net_device *device)
+{
+	struct vnic *vnic;
+
+	VNIC_FUNCTION("vnic_open()\n");
+	vnic = (struct vnic *)device->priv;
+
+	vnic->open++;
+	vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+	vnic->xmit_started = 1;
+	netif_start_queue(vnic->netdevice);
+
+	return 0;
+}
+
+static int vnic_stop(struct net_device *device)
+{
+	struct vnic *vnic;
+	int ret = 0;
+
+	VNIC_FUNCTION("vnic_stop()\n");
+	vnic = (struct vnic *)device->priv;
+	netif_stop_queue(device);
+	vnic->xmit_started = 0;
+	vnic->open--;
+	vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+
+	return ret;
+}
+
+static int vnic_hard_start_xmit(struct sk_buff *skb,
+				struct net_device *device)
+{
+	struct vnic *vnic;
+	struct netpath *np;
+	cycles_t xmit_time;
+	int	 ret = -1;
+
+	VNIC_FUNCTION("vnic_hard_start_xmit()\n");
+	vnic = (struct vnic *)device->priv;
+	np = vnic->current_path;
+
+	vnic_pre_pkt_xmit_stats(&xmit_time);
+
+	if (np && np->viport)
+		ret = viport_xmit_packet(np->viport, skb);
+
+	if (ret) {
+		vnic_xmit_fail_stats(vnic);
+		dev_kfree_skb_any(skb);
+		vnic->stats.tx_dropped++;
+		goto out;
+	}
+
+	device->trans_start = jiffies;
+	vnic_post_pkt_xmit_stats(vnic, xmit_time);
+out:
+	return 0;
+}
+
+static void vnic_tx_timeout(struct net_device *device)
+{
+	struct vnic *vnic;
+
+	VNIC_FUNCTION("vnic_tx_timeout()\n");
+	vnic = (struct vnic *)device->priv;
+	device->trans_start = jiffies;
+
+	if (vnic->current_path->viport)
+		viport_failure(vnic->current_path->viport);
+
+	VNIC_ERROR("vnic_tx_timeout\n");
+}
+
+static void vnic_set_multicast_list(struct net_device *device)
+{
+	struct vnic *vnic;
+	unsigned long flags;
+
+	VNIC_FUNCTION("vnic_set_multicast_list()\n");
+	vnic = (struct vnic *)device->priv;
+
+	spin_lock_irqsave(&vnic->lock, flags);
+	if (device->mc_count == 0) {
+		if (vnic->mc_list_len) {
+			vnic->mc_list_len = vnic->mc_count = 0;
+			kfree(vnic->mc_list);
+		}
+	} else {
+		struct dev_mc_list *mc_list = device->mc_list;
+		int i;
+
+		if (device->mc_count > vnic->mc_list_len) {
+			if (vnic->mc_list_len)
+				kfree(vnic->mc_list);
+			vnic->mc_list_len = device->mc_count + 10;
+			vnic->mc_list = kmalloc(vnic->mc_list_len *
+						sizeof *mc_list, GFP_ATOMIC);
+			if (!vnic->mc_list) {
+				vnic->mc_list_len = vnic->mc_count = 0;
+				VNIC_ERROR("failed allocating mc_list\n");
+				goto failure;
+			}
+		}
+		vnic->mc_count = device->mc_count;
+		for (i = 0; i < device->mc_count; i++) {
+			vnic->mc_list[i] = *mc_list;
+			vnic->mc_list[i].next = &vnic->mc_list[i + 1];
+			mc_list = mc_list->next;
+		}
+	}
+	spin_unlock_irqrestore(&vnic->lock, flags);
+
+	if (vnic->primary_path.viport)
+		viport_set_multicast(vnic->primary_path.viport,
+				     vnic->mc_list, vnic->mc_count);
+
+	if (vnic->secondary_path.viport)
+		viport_set_multicast(vnic->secondary_path.viport,
+				     vnic->mc_list, vnic->mc_count);
+
+	vnic_npevent_queue_evt(&vnic->primary_path, VNIC_PRINP_SETLINK);
+	return;
+failure:
+	spin_unlock_irqrestore(&vnic->lock, flags);
+}
+
+/**
+ * Following set of functions queues up the events for EVIC and the
+ * kernel thread queuing up the event might return.
+ */
+static int vnic_set_mac_address(struct net_device *device, void *addr)
+{
+	struct vnic	*vnic;
+	struct sockaddr	*sockaddr = addr;
+	u8		*address;
+	int		ret = -1;
+
+	VNIC_FUNCTION("vnic_set_mac_address()\n");
+	vnic = (struct vnic *)device->priv;
+
+	if (!is_valid_ether_addr(sockaddr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	if (netif_running(device))
+		return -EBUSY;
+
+	memcpy(device->dev_addr, sockaddr->sa_data, ETH_ALEN);
+	address = sockaddr->sa_data;
+
+	if (vnic->primary_path.viport)
+		ret = viport_set_unicast(vnic->primary_path.viport,
+					 address);
+
+	if (ret)
+		return ret;
+
+	if (vnic->secondary_path.viport)
+		viport_set_unicast(vnic->secondary_path.viport, address);
+
+	vnic->mac_set = 1;
+	return 0;
+}
+
+static int vnic_change_mtu(struct net_device *device, int mtu)
+{
+	struct vnic	*vnic;
+	int		ret = 0;
+	int		pri_max_mtu;
+	int		sec_max_mtu;
+
+	VNIC_FUNCTION("vnic_change_mtu()\n");
+	vnic = (struct vnic *)device->priv;
+
+	if (vnic->primary_path.viport)
+		pri_max_mtu = viport_max_mtu(vnic->primary_path.viport);
+	else
+		pri_max_mtu = MAX_PARAM_VALUE;
+
+	if (vnic->secondary_path.viport)
+		sec_max_mtu = viport_max_mtu(vnic->secondary_path.viport);
+	else
+		sec_max_mtu = MAX_PARAM_VALUE;
+
+	if ((mtu < pri_max_mtu) && (mtu < sec_max_mtu)) {
+		device->mtu = mtu;
+		vnic_npevent_queue_evt(&vnic->primary_path,
+				       VNIC_PRINP_SETLINK);
+		vnic_npevent_queue_evt(&vnic->secondary_path,
+				       VNIC_SECNP_SETLINK);
+	} else if (pri_max_mtu < sec_max_mtu)
+		printk(KERN_WARNING PFX "%s: Maximum "
+					"supported MTU size is %d. "
+					"Cannot set MTU to %d\n",
+					vnic->config->name, pri_max_mtu, mtu);
+	else
+		printk(KERN_WARNING PFX "%s: Maximum "
+					"supported MTU size is %d. "
+					"Cannot set MTU to %d\n",
+					vnic->config->name, sec_max_mtu, mtu);
+
+	return ret;
+}
+
+static int vnic_npevent_register(struct vnic *vnic, struct netpath *netpath)
+{
+	u8	*address;
+	int	ret;
+
+	if (!vnic->mac_set) {
+		/* if netpath == secondary_path, then the primary path isn't
+		 * connected.  MAC address will be set when the primary
+		 * connects.
+		 */
+		netpath_get_hw_addr(netpath, vnic->netdevice->dev_addr);
+		address = vnic->netdevice->dev_addr;
+
+		if (vnic->secondary_path.viport)
+			viport_set_unicast(vnic->secondary_path.viport,
+					   address);
+
+		vnic->mac_set = 1;
+	}
+	ret = register_netdev(vnic->netdevice);
+	if (ret) {
+		printk(KERN_ERR PFX "%s failed registering netdev "
+			"error %d - calling viport_failure\n",
+			config_viport_name(vnic->primary_path.viport->config),
+				ret);
+		vnic_free(vnic);
+		printk(KERN_ERR PFX "%s DELETED : register_netdev failure\n",
+			config_viport_name(vnic->primary_path.viport->config));
+		return ret;
+	}
+
+	vnic->state = VNIC_REGISTERED;
+	vnic->carrier = 2; /*special value to force netif_carrier_(on|off)*/
+	return 0;
+}
+
+static void vnic_npevent_dequeue_all(struct vnic *vnic)
+{
+	unsigned long flags;
+	struct vnic_npevent *npevt, *tmp;
+
+	spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+	if (list_empty(&vnic_npevent_list))
+		goto out;
+	list_for_each_entry_safe(npevt, tmp, &vnic_npevent_list,
+				 list_ptrs) {
+		if ((npevt->vnic == vnic)) {
+			list_del(&npevt->list_ptrs);
+			kfree(npevt);
+		}
+	}
+out:
+	spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+}
+
+static void update_path_and_reconnect(struct netpath *netpath,
+				      struct vnic *vnic)
+{
+	struct viport_config *config = netpath->viport->config;
+	int delay = 1;
+
+	if (vnic_ib_get_path(netpath, vnic))
+		return;
+	/*
+	 * tell viport_connect to wait for default_no_path_timeout
+	 * before connecting if  we are retrying the same path index
+	 * within default_no_path_timeout.
+	 * This prevents flooding connect requests to a path (or set
+	 * of paths) that aren't successfully connecting for some reason.
+	 */
+	if (jiffies > netpath->connect_time +
+		      vnic->config->no_path_timeout) {
+		netpath->path_idx = config->path_idx;
+		netpath->connect_time = jiffies;
+		netpath->delay_reconnect = 0;
+		delay = 0;
+	} else if (config->path_idx != netpath->path_idx) {
+		delay = netpath->delay_reconnect;
+		netpath->path_idx = config->path_idx;
+		netpath->delay_reconnect = 1;
+	} else
+		delay = 1;
+	viport_connect(netpath->viport, delay);
+}
+
+static void vnic_set_uni_multicast(struct vnic *vnic,
+				   struct netpath *netpath)
+{
+	unsigned long	flags;
+	u8		*address;
+
+	if (vnic->mac_set) {
+		address = vnic->netdevice->dev_addr;
+
+		if (netpath->viport)
+			viport_set_unicast(netpath->viport, address);
+	}
+	spin_lock_irqsave(&vnic->lock, flags);
+
+	if (vnic->mc_list && netpath->viport)
+		viport_set_multicast(netpath->viport, vnic->mc_list,
+				     vnic->mc_count);
+
+	spin_unlock_irqrestore(&vnic->lock, flags);
+	if (vnic->state == VNIC_REGISTERED) {
+		if (!netpath->viport)
+			return;
+		viport_set_link(netpath->viport,
+				vnic->netdevice->flags & ~IFF_UP,
+				vnic->netdevice->mtu);
+	}
+}
+
+static void vnic_set_netpath_timers(struct vnic *vnic,
+				    struct netpath *netpath)
+{
+	switch (netpath->timer_state) {
+	case NETPATH_TS_IDLE:
+		netpath->timer_state = NETPATH_TS_ACTIVE;
+		if (vnic->state == VNIC_UNINITIALIZED)
+			netpath_timer(netpath,
+				      vnic->config->
+				      primary_connect_timeout);
+		else
+			netpath_timer(netpath,
+				      vnic->config->
+				      primary_reconnect_timeout);
+			break;
+	case NETPATH_TS_ACTIVE:
+		/*nothing to do*/
+		break;
+	case NETPATH_TS_EXPIRED:
+		if (vnic->state == VNIC_UNINITIALIZED)
+			vnic_npevent_register(vnic, netpath);
+
+		break;
+	}
+}
+
+static void vnic_check_primary_path_timer(struct vnic *vnic)
+{
+	switch (vnic->primary_path.timer_state) {
+	case NETPATH_TS_ACTIVE:
+		/* nothing to do. just wait */
+		break;
+	case NETPATH_TS_IDLE:
+		netpath_timer(&vnic->primary_path,
+			      vnic->config->
+			      primary_switch_timeout);
+		break;
+	case NETPATH_TS_EXPIRED:
+		printk(KERN_INFO PFX
+		       "%s: switching to primary path\n",
+		       vnic->config->name);
+
+		vnic->current_path = &vnic->primary_path;
+		if (vnic->config->use_tx_csum
+		    && netpath_can_tx_csum(vnic->
+					   current_path)) {
+			vnic->netdevice->features |=
+					    NETIF_F_IP_CSUM;
+		}
+		break;
+	}
+}
+
+static void vnic_carrier_loss(struct vnic *vnic,
+			      struct netpath *last_path)
+{
+	if (vnic->primary_path.carrier) {
+		vnic->carrier = 1;
+		vnic->current_path = &vnic->primary_path;
+
+		if (last_path && last_path != vnic->current_path)
+			printk(KERN_INFO PFX
+			       "%s: failing over to primary path\n",
+			       vnic->config->name);
+		else if (!last_path)
+			printk(KERN_INFO PFX "%s: using primary path\n",
+			       vnic->config->name);
+
+		if (vnic->config->use_tx_csum &&
+		    netpath_can_tx_csum(vnic->current_path))
+			vnic->netdevice->features |= NETIF_F_IP_CSUM;
+
+	} else if ((vnic->secondary_path.carrier) &&
+		   (vnic->secondary_path.timer_state != NETPATH_TS_ACTIVE)) {
+		vnic->carrier = 1;
+		vnic->current_path = &vnic->secondary_path;
+
+		if (last_path && last_path != vnic->current_path)
+			printk(KERN_INFO PFX
+			       "%s: failing over to secondary path\n",
+			       vnic->config->name);
+		else if (!last_path)
+			printk(KERN_INFO PFX "%s: using secondary path\n",
+			       vnic->config->name);
+
+		if (vnic->config->use_tx_csum &&
+		    netpath_can_tx_csum(vnic->current_path))
+			vnic->netdevice->features |= NETIF_F_IP_CSUM;
+
+	}
+
+}
+
+static void vnic_handle_path_change(struct vnic *vnic,
+				    struct netpath **path)
+{
+	struct netpath *last_path = *path;
+
+	if (!last_path) {
+		if (vnic->current_path == &vnic->primary_path)
+			last_path = &vnic->secondary_path;
+		else
+			last_path = &vnic->primary_path;
+
+	}
+
+	if (vnic->current_path && vnic->current_path->viport)
+		viport_set_link(vnic->current_path->viport,
+				vnic->netdevice->flags,
+				vnic->netdevice->mtu);
+
+	if (last_path->viport)
+		viport_set_link(last_path->viport,
+				 vnic->netdevice->flags &
+				 ~IFF_UP, vnic->netdevice->mtu);
+
+	vnic_restart_xmit(vnic, vnic->current_path);
+}
+
+static void vnic_report_path_change(struct vnic *vnic,
+				    struct netpath *last_path,
+				    int other_path_ok)
+{
+	if (!vnic->current_path) {
+		if (last_path == &vnic->primary_path)
+			printk(KERN_INFO PFX "%s: primary path lost, "
+			       "no failover path available\n",
+			       vnic->config->name);
+		else
+			printk(KERN_INFO PFX "%s: secondary path lost, "
+			       "no failover path available\n",
+			       vnic->config->name);
+		return;
+	}
+
+	if (last_path != vnic->current_path)
+		return;
+
+	if (vnic->current_path == &vnic->secondary_path) {
+		if (other_path_ok != vnic->primary_path.carrier) {
+			if (other_path_ok)
+				printk(KERN_INFO PFX "%s: primary path no"
+				       " longer available for failover\n",
+				       vnic->config->name);
+			else
+				printk(KERN_INFO PFX "%s: primary path now"
+				       " available for failover\n",
+				       vnic->config->name);
+		}
+	} else {
+		if (other_path_ok != vnic->secondary_path.carrier) {
+			if (other_path_ok)
+				printk(KERN_INFO PFX "%s: secondary path no"
+				       " longer available for failover\n",
+				       vnic->config->name);
+			else
+				printk(KERN_INFO PFX "%s: secondary path now"
+				       " available for failover\n",
+				       vnic->config->name);
+		}
+	}
+}
+
+static void vnic_handle_free_vnic_evt(struct vnic *vnic)
+{
+	netpath_timer_stop(&vnic->primary_path);
+	netpath_timer_stop(&vnic->secondary_path);
+	vnic->current_path = NULL;
+	netpath_free(&vnic->primary_path);
+	netpath_free(&vnic->secondary_path);
+	if (vnic->state == VNIC_REGISTERED) {
+		unregister_netdev(vnic->netdevice);
+		free_netdev(vnic->netdevice);
+	}
+	vnic_npevent_dequeue_all(vnic);
+	kfree(vnic->config);
+	if (vnic->mc_list_len) {
+		vnic->mc_list_len = vnic->mc_count = 0;
+		kfree(vnic->mc_list);
+	}
+
+	sysfs_remove_group(&vnic->dev_info.dev.kobj,
+			   &vnic_dev_attr_group);
+	vnic_cleanup_stats_files(vnic);
+	device_unregister(&vnic->dev_info.dev);
+	wait_for_completion(&vnic->dev_info.released);
+}
+
+static struct vnic *vnic_handle_npevent(struct vnic *vnic,
+					 enum vnic_npevent_type npevt_type)
+{
+	struct netpath	*netpath;
+	const char *netpath_str;
+
+	if (npevt_type <= VNIC_PRINP_LASTTYPE)
+		netpath_str = netpath_to_string(vnic, &vnic->primary_path);
+	else if	(npevt_type <= VNIC_SECNP_LASTTYPE)
+		netpath_str = netpath_to_string(vnic, &vnic->secondary_path);
+	else
+		netpath_str = netpath_to_string(vnic, vnic->current_path);
+
+	VNIC_INFO("%s: processing %s, netpath=%s, carrier=%d\n",
+		  vnic->config->name, vnic_npevent_str[npevt_type],
+		  netpath_str, vnic->carrier);
+
+	switch (npevt_type) {
+	case VNIC_PRINP_CONNECTED:
+		netpath = &vnic->primary_path;
+		if (vnic->state == VNIC_UNINITIALIZED) {
+			if (vnic_npevent_register(vnic, netpath))
+				break;
+		}
+		vnic_set_uni_multicast(vnic, netpath);
+		break;
+	case VNIC_SECNP_CONNECTED:
+		vnic_set_uni_multicast(vnic, &vnic->secondary_path);
+		break;
+	case VNIC_PRINP_TIMEREXPIRED:
+		netpath = &vnic->primary_path;
+		netpath->timer_state = NETPATH_TS_EXPIRED;
+		if (!netpath->carrier)
+			update_path_and_reconnect(netpath, vnic);
+		break;
+	case VNIC_SECNP_TIMEREXPIRED:
+		netpath = &vnic->secondary_path;
+		netpath->timer_state = NETPATH_TS_EXPIRED;
+		if (!netpath->carrier)
+			update_path_and_reconnect(netpath, vnic);
+		else {
+			if (vnic->state == VNIC_UNINITIALIZED)
+				vnic_npevent_register(vnic, netpath);
+		}
+		break;
+	case VNIC_PRINP_LINKUP:
+		vnic->primary_path.carrier = 1;
+		break;
+	case VNIC_SECNP_LINKUP:
+		netpath = &vnic->secondary_path;
+		netpath->carrier = 1;
+		if (!vnic->carrier)
+			vnic_set_netpath_timers(vnic, netpath);
+		break;
+	case VNIC_PRINP_LINKDOWN:
+		vnic->primary_path.carrier = 0;
+		break;
+	case VNIC_SECNP_LINKDOWN:
+		if (vnic->state == VNIC_UNINITIALIZED)
+			netpath_timer_stop(&vnic->secondary_path);
+		vnic->secondary_path.carrier = 0;
+		break;
+	case VNIC_PRINP_DISCONNECTED:
+		netpath = &vnic->primary_path;
+		netpath_timer_stop(netpath);
+		netpath->carrier = 0;
+		update_path_and_reconnect(netpath, vnic);
+		break;
+	case VNIC_SECNP_DISCONNECTED:
+		netpath = &vnic->secondary_path;
+		netpath_timer_stop(netpath);
+		netpath->carrier = 0;
+		update_path_and_reconnect(netpath, vnic);
+		break;
+	case VNIC_PRINP_SETLINK:
+		netpath = vnic->current_path;
+		if (!netpath || !netpath->viport)
+			break;
+		viport_set_link(netpath->viport,
+				vnic->netdevice->flags,
+				vnic->netdevice->mtu);
+		break;
+	case VNIC_SECNP_SETLINK:
+		netpath = &vnic->secondary_path;
+		if (!netpath || !netpath->viport)
+			break;
+		viport_set_link(netpath->viport,
+				vnic->netdevice->flags,
+				vnic->netdevice->mtu);
+		break;
+	case VNIC_NP_FREEVNIC:
+		vnic_handle_free_vnic_evt(vnic);
+		kfree(vnic);
+		vnic = NULL;
+		break;
+	}
+	return vnic;
+}
+
+static int vnic_npevent_statemachine(void *context)
+{
+	struct vnic_npevent	*vnic_link_evt;
+	enum vnic_npevent_type	npevt_type;
+	struct vnic		*vnic;
+	int			last_carrier;
+	int			other_path_ok = 0;
+	struct netpath		*last_path;
+
+	while (!vnic_npevent_thread_end ||
+	       !list_empty(&vnic_npevent_list)) {
+		unsigned long flags;
+
+		wait_event_interruptible(vnic_npevent_queue,
+					 !list_empty(&vnic_npevent_list)
+					 || vnic_npevent_thread_end);
+		spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+		if (list_empty(&vnic_npevent_list)) {
+			spin_unlock_irqrestore(&vnic_npevent_list_lock,
+					       flags);
+			VNIC_INFO("netpath statemachine wake"
+				  " on empty list\n");
+			continue;
+		}
+
+		vnic_link_evt = list_entry(vnic_npevent_list.next,
+					   struct vnic_npevent,
+					   list_ptrs);
+		list_del(&vnic_link_evt->list_ptrs);
+		spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+		vnic = vnic_link_evt->vnic;
+		npevt_type = vnic_link_evt->event_type;
+		kfree(vnic_link_evt);
+
+		if (vnic->current_path == &vnic->secondary_path)
+			other_path_ok = vnic->primary_path.carrier;
+		else if (vnic->current_path == &vnic->primary_path)
+			other_path_ok = vnic->secondary_path.carrier;
+
+		vnic = vnic_handle_npevent(vnic, npevt_type);
+
+		if (!vnic)
+			continue;
+
+		last_carrier = vnic->carrier;
+		last_path = vnic->current_path;
+
+		if (!vnic->current_path ||
+		    !vnic->current_path->carrier) {
+			vnic->carrier = 0;
+			vnic->current_path = NULL;
+			vnic->netdevice->features &= ~NETIF_F_IP_CSUM;
+		}
+
+		if (!vnic->carrier)
+			vnic_carrier_loss(vnic, last_path);
+		else if ((vnic->current_path != &vnic->primary_path) &&
+			 (vnic->config->prefer_primary) &&
+			 (vnic->primary_path.carrier))
+				vnic_check_primary_path_timer(vnic);
+
+		if (last_path)
+			vnic_report_path_change(vnic, last_path,
+						other_path_ok);
+
+		VNIC_INFO("new netpath=%s, carrier=%d\n",
+			  netpath_to_string(vnic, vnic->current_path),
+			  vnic->carrier);
+
+		if (vnic->current_path != last_path)
+			vnic_handle_path_change(vnic, &last_path);
+
+		if (vnic->carrier != last_carrier) {
+			if (vnic->carrier) {
+				VNIC_INFO("netif_carrier_on\n");
+				netif_carrier_on(vnic->netdevice);
+				vnic_carrier_loss_stats(vnic);
+			} else {
+				VNIC_INFO("netif_carrier_off\n");
+				netif_carrier_off(vnic->netdevice);
+				vnic_disconn_stats(vnic);
+			}
+
+		}
+	}
+	complete_and_exit(&vnic_npevent_thread_exit, 0);
+	return 0;
+}
+
+void vnic_npevent_queue_evt(struct netpath *netpath,
+			    enum vnic_npevent_type evt)
+{
+	struct vnic_npevent *npevent;
+	unsigned long flags;
+
+	npevent = kmalloc(sizeof *npevent, GFP_ATOMIC);
+	if (!npevent) {
+		VNIC_ERROR("Could not allocate memory for vnic event\n");
+		return;
+	}
+	npevent->vnic = netpath->parent;
+	npevent->event_type = evt;
+	INIT_LIST_HEAD(&npevent->list_ptrs);
+	spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+	list_add_tail(&npevent->list_ptrs, &vnic_npevent_list);
+	spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+	wake_up(&vnic_npevent_queue);
+}
+
+void vnic_npevent_dequeue_evt(struct netpath *netpath,
+			      enum vnic_npevent_type evt)
+{
+	unsigned long flags;
+	struct vnic_npevent *npevt, *tmp;
+	struct vnic *vnic = netpath->parent;
+
+	spin_lock_irqsave(&vnic_npevent_list_lock, flags);
+	if (list_empty(&vnic_npevent_list))
+		goto out;
+	list_for_each_entry_safe(npevt, tmp, &vnic_npevent_list,
+				 list_ptrs) {
+		if ((npevt->vnic == vnic) &&
+		    (npevt->event_type == evt)) {
+			list_del(&npevt->list_ptrs);
+			kfree(npevt);
+			break;
+		}
+	}
+out:
+	spin_unlock_irqrestore(&vnic_npevent_list_lock, flags);
+}
+
+static int vnic_npevent_start(void)
+{
+	VNIC_FUNCTION("vnic_npevent_start()\n");
+
+	spin_lock_init(&vnic_npevent_list_lock);
+	vnic_npevent_thread = kthread_run(vnic_npevent_statemachine, NULL,
+						"qlgc_vnic_npevent_s_m");
+	if (IS_ERR(vnic_npevent_thread)) {
+		printk(KERN_WARNING PFX "failed to create vnic npevent"
+		       " thread; error %d\n",
+			(int) PTR_ERR(vnic_npevent_thread));
+		vnic_npevent_thread = NULL;
+		return 1;
+	}
+
+	return 0;
+}
+
+void vnic_npevent_cleanup(void)
+{
+	if (vnic_npevent_thread) {
+		vnic_npevent_thread_end = 1;
+		wake_up(&vnic_npevent_queue);
+		wait_for_completion(&vnic_npevent_thread_exit);
+		vnic_npevent_thread = NULL;
+	}
+}
+
+static void vnic_setup(struct net_device *device)
+{
+	ether_setup(device);
+
+	/* ether_setup is used to fill
+	 * device parameters for ethernet devices.
+	 * We override some of the parameters
+	 * which are specific to VNIC.
+	 */
+	device->get_stats		= vnic_get_stats;
+	device->open			= vnic_open;
+	device->stop			= vnic_stop;
+	device->hard_start_xmit		= vnic_hard_start_xmit;
+	device->tx_timeout		= vnic_tx_timeout;
+	device->set_multicast_list	= vnic_set_multicast_list;
+	device->set_mac_address		= vnic_set_mac_address;
+	device->change_mtu		= vnic_change_mtu;
+	device->watchdog_timeo 		= 10 * HZ;
+	device->features		= 0;
+}
+
+struct vnic *vnic_allocate(struct vnic_config *config)
+{
+	struct vnic *vnic = NULL;
+
+	VNIC_FUNCTION("vnic_allocate()\n");
+	vnic = kzalloc(sizeof *vnic, GFP_KERNEL);
+	if (!vnic) {
+		VNIC_ERROR("failed allocating vnic structure\n");
+		return NULL;
+	}
+
+	spin_lock_init(&vnic->lock);
+	vnic_alloc_stats(vnic);
+	vnic->state = VNIC_UNINITIALIZED;
+	vnic->config = config;
+
+	/* Allocating a VNIC network device.
+	 * The private data structure for VNIC will be taken care by the
+	 * VNIC driver, hence setting size of private data structure to 0.
+	 */
+	vnic->netdevice = alloc_netdev((int) 0, config->name, vnic_setup);
+	vnic->netdevice->priv = (void *)vnic;
+
+	netpath_init(&vnic->primary_path, vnic, 0);
+	netpath_init(&vnic->secondary_path, vnic, 1);
+
+	vnic->current_path = NULL;
+
+	list_add_tail(&vnic->list_ptrs, &vnic_list);
+
+	return vnic;
+}
+
+void vnic_free(struct vnic *vnic)
+{
+	VNIC_FUNCTION("vnic_free()\n");
+	list_del(&vnic->list_ptrs);
+	vnic_npevent_queue_evt(&vnic->primary_path, VNIC_NP_FREEVNIC);
+}
+
+static void __exit vnic_cleanup(void)
+{
+	VNIC_FUNCTION("vnic_cleanup()\n");
+
+	VNIC_INIT("unloading %s\n", MODULEDETAILS);
+
+	while (!list_empty(&vnic_list)) {
+		struct vnic *vnic =
+		    list_entry(vnic_list.next, struct vnic, list_ptrs);
+		vnic_free(vnic);
+	}
+
+	vnic_npevent_cleanup();
+	viport_cleanup();
+	vnic_ib_cleanup();
+}
+
+static int __init vnic_init(void)
+{
+	int ret;
+	VNIC_FUNCTION("vnic_init()\n");
+	VNIC_INIT("Initializing %s\n", MODULEDETAILS);
+
+	ret = config_start();
+	if (ret) {
+		VNIC_ERROR("config_start failed\n");
+		goto failure;
+	}
+
+	ret = vnic_ib_init();
+	if (ret) {
+		VNIC_ERROR("ib_start failed\n");
+		goto failure;
+	}
+
+	ret = viport_start();
+	if (ret) {
+		VNIC_ERROR("viport_start failed\n");
+		goto failure;
+	}
+
+	ret = vnic_npevent_start();
+	if (ret) {
+		VNIC_ERROR("vnic_npevent_start failed\n");
+		goto failure;
+	}
+
+	return 0;
+failure:
+	vnic_cleanup();
+	return ret;
+}
+
+module_init(vnic_init);
+module_exit(vnic_cleanup);
diff --git a/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h
new file mode 100644
index 0000000..c5ccd8b
--- /dev/null
+++ b/drivers/infiniband/ulp/qlgc_vnic/vnic_main.h
@@ -0,0 +1,167 @@
+/*
+ * Copyright (c) 2006 QLogic, Inc.  All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef VNIC_MAIN_H_INCLUDED
+#define VNIC_MAIN_H_INCLUDED
+
+#include <linux/timex.h>
+#include <linux/netdevice.h>
+#include <linux/kthread.h>
+#include <linux/fs.h>
+
+#include "vnic_config.h"
+#include "vnic_netpath.h"
+
+extern u16 vnic_max_mtu;
+extern struct list_head vnic_list;
+extern struct attribute_group vnic_stats_attr_group;
+extern cycles_t recv_ref;
+
+enum vnic_npevent_type {
+	VNIC_PRINP_CONNECTED	= 0,
+	VNIC_PRINP_DISCONNECTED	= 1,
+	VNIC_PRINP_LINKUP	= 2,
+	VNIC_PRINP_LINKDOWN	= 3,
+	VNIC_PRINP_TIMEREXPIRED	= 4,
+	VNIC_PRINP_SETLINK	= 5,
+
+	/* used to figure out PRI vs SEC types for dbg msg*/
+	VNIC_PRINP_LASTTYPE     = VNIC_PRINP_SETLINK,
+
+	VNIC_SECNP_CONNECTED	= 6,
+	VNIC_SECNP_DISCONNECTED	= 7,
+	VNIC_SECNP_LINKUP	= 8,
+	VNIC_SECNP_LINKDOWN	= 9,
+	VNIC_SECNP_TIMEREXPIRED	= 10,
+	VNIC_SECNP_SETLINK	= 11,
+
+	/* used to figure out PRI vs SEC types for dbg msg*/
+	VNIC_SECNP_LASTTYPE     = VNIC_SECNP_SETLINK,
+
+	VNIC_NP_FREEVNIC	= 12,
+};
+
+/* This array should be kept next to enum above since a change to npevent_type
+   enum affects this array. */
+static const char *const vnic_npevent_str[] = {
+    "PRIMARY CONNECTED",
+    "PRIMARY DISCONNECTED",
+    "PRIMARY CARRIER",
+    "PRIMARY NO CARRIER",
+    "PRIMARY TIMER EXPIRED",
+    "PRIMARY SETLINK",
+    "SECONDARY CONNECTED",
+    "SECONDARY DISCONNECTED",
+    "SECONDARY CARRIER",
+    "SECONDARY NO CARRIER",
+    "SECONDARY TIMER EXPIRED",
+    "SECONDARY SETLINK",
+    "FREE VNIC",
+};
+
+
+struct vnic_npevent {
+	struct list_head	list_ptrs;
+	struct vnic		*vnic;
+	enum vnic_npevent_type	event_type;
+};
+
+void vnic_npevent_queue_evt(struct netpath *netpath,
+			    enum vnic_npevent_type evt);
+void vnic_npevent_dequeue_evt(struct netpath *netpath,
+			      enum vnic_npevent_type evt);
+
+enum vnic_state {
+	VNIC_UNINITIALIZED	= 0,
+	VNIC_REGISTERED		= 1
+};
+
+struct vnic {
+	struct list_head		list_ptrs;
+	enum vnic_state			state;
+	struct vnic_config		*config;
+	struct netpath			*current_path;
+	struct netpath			primary_path;
+	struct netpath			secondary_path;
+	int				open;
+	int				carrier;
+	int				xmit_started;
+	int				mac_set;
+	struct net_device_stats 	stats;
+	struct net_device		*netdevice;
+	struct dev_info			dev_info;
+	struct dev_mc_list		*mc_list;
+	int				mc_list_len;
+	int				mc_count;
+	spinlock_t			lock;
+#ifdef CONFIG_INFINIBAND_QLGC_VNIC_STATS
+	struct {
+		cycles_t	start_time;
+		cycles_t	conn_time;
+		cycles_t	disconn_ref;	/* intermediate time */
+		cycles_t	disconn_time;
+		u32		disconn_num;
+		cycles_t	xmit_time;
+		u32		xmit_num;
+		u32		xmit_fail;
+		cycles_t	recv_time;
+		u32		recv_num;
+		u32		multicast_recv_num;
+		cycles_t	xmit_ref;	/* intermediate time */
+		cycles_t	xmit_off_time;
+		u32		xmit_off_num;
+		cycles_t	carrier_ref;	/* intermediate time */
+		cycles_t	carrier_off_time;
+		u32		carrier_off_num;
+	} statistics;
+	struct dev_info		stat_info;
+#endif	/* CONFIG_INFINIBAND_QLGC_VNIC_STATS */
+};
+
+struct vnic *vnic_allocate(struct vnic_config *config);
+
+void vnic_free(struct vnic *vnic);
+
+void vnic_connected(struct vnic *vnic, struct netpath *netpath);
+void vnic_disconnected(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_link_up(struct vnic *vnic, struct netpath *netpath);
+void vnic_link_down(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_stop_xmit(struct vnic *vnic, struct netpath *netpath);
+void vnic_restart_xmit(struct vnic *vnic, struct netpath *netpath);
+
+void vnic_recv_packet(struct vnic *vnic, struct netpath *netpath,
+		      struct sk_buff *skb);
+void vnic_npevent_cleanup(void);
+void completion_callback_cleanup(struct vnic_ib_conn *ib_conn);
+#endif	/* VNIC_MAIN_H_INCLUDED */

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