[SCSI] fcoe: renames libfcoe.c to fcoe.c as the only fcoe module file

Renames libfcoe.c to fcoe.c, fcoe.c becomes the only
.c file for fcoe.ko.

Also deleted "$Id: Makefile" from fcoe module Makefle.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 1986 insertions, 0 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
new file mode 100644
index 000000000000..a81a8ec3908e
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -0,0 +1,1986 @@
+/*
+ * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/kthread.h>
+#include <linux/crc32.h>
+#include <linux/cpu.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <net/rtnetlink.h>
+
+#include <scsi/fc/fc_encaps.h>
+
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfcoe.h>
+
+static int debug_fcoe;
+
+#define FCOE_MAX_QUEUE_DEPTH  256
+#define FCOE_LOW_QUEUE_DEPTH  32
+
+/* destination address mode */
+#define FCOE_GW_ADDR_MODE           0x00
+#define FCOE_FCOUI_ADDR_MODE        0x01
+
+#define FCOE_WORD_TO_BYTE  4
+
+#define FCOE_VERSION    "0.1"
+#define FCOE_NAME       "fcoe"
+#define FCOE_VENDOR     "Open-FCoE.org"
+
+#define FCOE_MAX_LUN            255
+#define FCOE_MAX_FCP_TARGET     256
+
+#define FCOE_MAX_OUTSTANDING_COMMANDS   1024
+
+#define FCOE_MIN_XID            0x0001  /* the min xid supported by fcoe_sw */
+#define FCOE_MAX_XID            0x07ef  /* the max xid supported by fcoe_sw */
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FCoE");
+MODULE_LICENSE("GPL");
+
+/* fcoe host list */
+LIST_HEAD(fcoe_hostlist);
+DEFINE_RWLOCK(fcoe_hostlist_lock);
+DEFINE_TIMER(fcoe_timer, NULL, 0, 0);
+DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
+
+
+/* Function Prototyes */
+static int fcoe_check_wait_queue(struct fc_lport *);
+static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *);
+static int fcoe_device_notification(struct notifier_block *, ulong, void *);
+static void fcoe_dev_setup(void);
+static void fcoe_dev_cleanup(void);
+
+/* notification function from net device */
+static struct notifier_block fcoe_notifier = {
+        .notifier_call = fcoe_device_notification,
+};
+
+static struct scsi_transport_template *scsi_transport_fcoe_sw;
+
+struct fc_function_template fcoe_transport_function = {
+        .show_host_node_name = 1,
+        .show_host_port_name = 1,
+        .show_host_supported_classes = 1,
+        .show_host_supported_fc4s = 1,
+        .show_host_active_fc4s = 1,
+        .show_host_maxframe_size = 1,
+
+        .show_host_port_id = 1,
+        .show_host_supported_speeds = 1,
+        .get_host_speed = fc_get_host_speed,
+        .show_host_speed = 1,
+        .show_host_port_type = 1,
+        .get_host_port_state = fc_get_host_port_state,
+        .show_host_port_state = 1,
+        .show_host_symbolic_name = 1,
+
+        .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+        .show_rport_maxframe_size = 1,
+        .show_rport_supported_classes = 1,
+
+        .show_host_fabric_name = 1,
+        .show_starget_node_name = 1,
+        .show_starget_port_name = 1,
+        .show_starget_port_id = 1,
+        .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+        .show_rport_dev_loss_tmo = 1,
+        .get_fc_host_stats = fc_get_host_stats,
+        .issue_fc_host_lip = fcoe_reset,
+
+        .terminate_rport_io = fc_rport_terminate_io,
+};
+
+static struct scsi_host_template fcoe_shost_template = {
+        .module = THIS_MODULE,
+        .name = "FCoE Driver",
+        .proc_name = FCOE_NAME,
+        .queuecommand = fc_queuecommand,
+        .eh_abort_handler = fc_eh_abort,
+        .eh_device_reset_handler = fc_eh_device_reset,
+        .eh_host_reset_handler = fc_eh_host_reset,
+        .slave_alloc = fc_slave_alloc,
+        .change_queue_depth = fc_change_queue_depth,
+        .change_queue_type = fc_change_queue_type,
+        .this_id = -1,
+        .cmd_per_lun = 32,
+        .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
+        .use_clustering = ENABLE_CLUSTERING,
+        .sg_tablesize = SG_ALL,
+        .max_sectors = 0xffff,
+};
+
+/**
+ * fcoe_lport_config() - sets up the fc_lport
+ * @lp: ptr to the fc_lport
+ * @shost: ptr to the parent scsi host
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_lport_config(struct fc_lport *lp)
+{
+        lp->link_up = 0;
+        lp->qfull = 0;
+        lp->max_retry_count = 3;
+        lp->e_d_tov = 2 * 1000; /* FC-FS default */
+        lp->r_a_tov = 2 * 2 * 1000;
+        lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+                              FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+
+        fc_lport_init_stats(lp);
+
+        /* lport fc_lport related configuration */
+        fc_lport_config(lp);
+
+        /* offload related configuration */
+        lp->crc_offload = 0;
+        lp->seq_offload = 0;
+        lp->lro_enabled = 0;
+        lp->lro_xid = 0;
+        lp->lso_max = 0;
+
+        return 0;
+}
+
+/**
+ * fcoe_netdev_config() - Set up netdev for SW FCoE
+ * @lp : ptr to the fc_lport
+ * @netdev : ptr to the associated netdevice struct
+ *
+ * Must be called after fcoe_lport_config() as it will use lport mutex
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
+{
+        u32 mfs;
+        u64 wwnn, wwpn;
+        struct fcoe_softc *fc;
+        u8 flogi_maddr[ETH_ALEN];
+
+        /* Setup lport private data to point to fcoe softc */
+        fc = lport_priv(lp);
+        fc->lp = lp;
+        fc->real_dev = netdev;
+        fc->phys_dev = netdev;
+
+        /* Require support for get_pauseparam ethtool op. */
+        if (netdev->priv_flags & IFF_802_1Q_VLAN)
+                fc->phys_dev = vlan_dev_real_dev(netdev);
+
+        /* Do not support for bonding device */
+        if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
+            (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
+            (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
+                return -EOPNOTSUPP;
+        }
+
+        /*
+         * Determine max frame size based on underlying device and optional
+         * user-configured limit.  If the MFS is too low, fcoe_link_ok()
+         * will return 0, so do this first.
+         */
+        mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
+                                   sizeof(struct fcoe_crc_eof));
+        if (fc_set_mfs(lp, mfs))
+                return -EINVAL;
+
+        if (!fcoe_link_ok(lp))
+                lp->link_up = 1;
+
+        /* offload features support */
+        if (fc->real_dev->features & NETIF_F_SG)
+                lp->sg_supp = 1;
+
+#ifdef NETIF_F_FCOE_CRC
+        if (netdev->features & NETIF_F_FCOE_CRC) {
+                lp->crc_offload = 1;
+                printk(KERN_DEBUG "fcoe:%s supports FCCRC offload\n",
+                       netdev->name);
+        }
+#endif
+#ifdef NETIF_F_FSO
+        if (netdev->features & NETIF_F_FSO) {
+                lp->seq_offload = 1;
+                lp->lso_max = netdev->gso_max_size;
+                printk(KERN_DEBUG "fcoe:%s supports LSO for max len 0x%x\n",
+                       netdev->name, lp->lso_max);
+        }
+#endif
+        if (netdev->fcoe_ddp_xid) {
+                lp->lro_enabled = 1;
+                lp->lro_xid = netdev->fcoe_ddp_xid;
+                printk(KERN_DEBUG "fcoe:%s supports LRO for max xid 0x%x\n",
+                       netdev->name, lp->lro_xid);
+        }
+        skb_queue_head_init(&fc->fcoe_pending_queue);
+        fc->fcoe_pending_queue_active = 0;
+
+        /* setup Source Mac Address */
+        memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
+               fc->real_dev->addr_len);
+
+        wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
+        fc_set_wwnn(lp, wwnn);
+        /* XXX - 3rd arg needs to be vlan id */
+        wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
+        fc_set_wwpn(lp, wwpn);
+
+        /*
+         * Add FCoE MAC address as second unicast MAC address
+         * or enter promiscuous mode if not capable of listening
+         * for multiple unicast MACs.
+         */
+        rtnl_lock();
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+        rtnl_unlock();
+
+        /*
+         * setup the receive function from ethernet driver
+         * on the ethertype for the given device
+         */
+        fc->fcoe_packet_type.func = fcoe_rcv;
+        fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
+        fc->fcoe_packet_type.dev = fc->real_dev;
+        dev_add_pack(&fc->fcoe_packet_type);
+
+        return 0;
+}
+
+/**
+ * fcoe_shost_config() - Sets up fc_lport->host
+ * @lp : ptr to the fc_lport
+ * @shost : ptr to the associated scsi host
+ * @dev : device associated to scsi host
+ *
+ * Must be called after fcoe_lport_config() and fcoe_netdev_config()
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
+                                struct device *dev)
+{
+        int rc = 0;
+
+        /* lport scsi host config */
+        lp->host = shost;
+
+        lp->host->max_lun = FCOE_MAX_LUN;
+        lp->host->max_id = FCOE_MAX_FCP_TARGET;
+        lp->host->max_channel = 0;
+        lp->host->transportt = scsi_transport_fcoe_sw;
+
+        /* add the new host to the SCSI-ml */
+        rc = scsi_add_host(lp->host, dev);
+        if (rc) {
+                FC_DBG("fcoe_shost_config:error on scsi_add_host\n");
+                return rc;
+        }
+        sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
+                FCOE_NAME, FCOE_VERSION,
+                fcoe_netdev(lp)->name);
+
+        return 0;
+}
+
+/**
+ * fcoe_em_config() - allocates em for this lport
+ * @lp: the port that em is to allocated for
+ *
+ * Returns : 0 on success
+ */
+static inline int fcoe_em_config(struct fc_lport *lp)
+{
+        BUG_ON(lp->emp);
+
+        lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+                                    FCOE_MIN_XID, FCOE_MAX_XID);
+        if (!lp->emp)
+                return -ENOMEM;
+
+        return 0;
+}
+
+/**
+ * fcoe_if_destroy() - FCoE software HBA tear-down function
+ * @netdev: ptr to the associated net_device
+ *
+ * Returns: 0 if link is OK for use by FCoE.
+ */
+static int fcoe_if_destroy(struct net_device *netdev)
+{
+        struct fc_lport *lp = NULL;
+        struct fcoe_softc *fc;
+        u8 flogi_maddr[ETH_ALEN];
+
+        BUG_ON(!netdev);
+
+        printk(KERN_DEBUG "fcoe_if_destroy:interface on %s\n",
+               netdev->name);
+
+        lp = fcoe_hostlist_lookup(netdev);
+        if (!lp)
+                return -ENODEV;
+
+        fc = lport_priv(lp);
+
+        /* Logout of the fabric */
+        fc_fabric_logoff(lp);
+
+        /* Remove the instance from fcoe's list */
+        fcoe_hostlist_remove(lp);
+
+        /* Don't listen for Ethernet packets anymore */
+        dev_remove_pack(&fc->fcoe_packet_type);
+
+        /* Cleanup the fc_lport */
+        fc_lport_destroy(lp);
+        fc_fcp_destroy(lp);
+
+        /* Detach from the scsi-ml */
+        fc_remove_host(lp->host);
+        scsi_remove_host(lp->host);
+
+        /* There are no more rports or I/O, free the EM */
+        if (lp->emp)
+                fc_exch_mgr_free(lp->emp);
+
+        /* Delete secondary MAC addresses */
+        rtnl_lock();
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
+        if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
+                dev_unicast_delete(fc->real_dev, fc->data_src_addr, ETH_ALEN);
+        rtnl_unlock();
+
+        /* Free the per-CPU revieve threads */
+        fcoe_percpu_clean(lp);
+
+        /* Free existing skbs */
+        fcoe_clean_pending_queue(lp);
+
+        /* Free memory used by statistical counters */
+        fc_lport_free_stats(lp);
+
+        /* Release the net_device and Scsi_Host */
+        dev_put(fc->real_dev);
+        scsi_host_put(lp->host);
+
+        return 0;
+}
+
+/*
+ * fcoe_ddp_setup - calls LLD's ddp_setup through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ * @sgl: the scatterlist describing this transfer
+ * @sgc: number of sg items
+ *
+ * Returns : 0 no ddp
+ */
+static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
+                             struct scatterlist *sgl, unsigned int sgc)
+{
+        struct net_device *n = fcoe_netdev(lp);
+
+        if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
+                return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
+
+        return 0;
+}
+
+/*
+ * fcoe_ddp_done - calls LLD's ddp_done through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ *
+ * Returns : the length of data that have been completed by ddp
+ */
+static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
+{
+        struct net_device *n = fcoe_netdev(lp);
+
+        if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
+                return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
+        return 0;
+}
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+        .frame_send = fcoe_xmit,
+        .ddp_setup = fcoe_ddp_setup,
+        .ddp_done = fcoe_ddp_done,
+};
+
+/**
+ * fcoe_if_create() - this function creates the fcoe interface
+ * @netdev: pointer the associated netdevice
+ *
+ * Creates fc_lport struct and scsi_host for lport, configures lport
+ * and starts fabric login.
+ *
+ * Returns : 0 on success
+ */
+static int fcoe_if_create(struct net_device *netdev)
+{
+        int rc;
+        struct fc_lport *lp = NULL;
+        struct fcoe_softc *fc;
+        struct Scsi_Host *shost;
+
+        BUG_ON(!netdev);
+
+        printk(KERN_DEBUG "fcoe_if_create:interface on %s\n",
+               netdev->name);
+
+        lp = fcoe_hostlist_lookup(netdev);
+        if (lp)
+                return -EEXIST;
+
+        shost = fcoe_host_alloc(&fcoe_shost_template,
+                                sizeof(struct fcoe_softc));
+        if (!shost) {
+                FC_DBG("Could not allocate host structure\n");
+                return -ENOMEM;
+        }
+        lp = shost_priv(shost);
+        fc = lport_priv(lp);
+
+        /* configure fc_lport, e.g., em */
+        rc = fcoe_lport_config(lp);
+        if (rc) {
+                FC_DBG("Could not configure lport\n");
+                goto out_host_put;
+        }
+
+        /* configure lport network properties */
+        rc = fcoe_netdev_config(lp, netdev);
+        if (rc) {
+                FC_DBG("Could not configure netdev for lport\n");
+                goto out_host_put;
+        }
+
+        /* configure lport scsi host properties */
+        rc = fcoe_shost_config(lp, shost, &netdev->dev);
+        if (rc) {
+                FC_DBG("Could not configure shost for lport\n");
+                goto out_host_put;
+        }
+
+        /* lport exch manager allocation */
+        rc = fcoe_em_config(lp);
+        if (rc) {
+                FC_DBG("Could not configure em for lport\n");
+                goto out_host_put;
+        }
+
+        /* Initialize the library */
+        rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
+        if (rc) {
+                FC_DBG("Could not configure libfc for lport!\n");
+                goto out_lp_destroy;
+        }
+
+        /* add to lports list */
+        fcoe_hostlist_add(lp);
+
+        lp->boot_time = jiffies;
+
+        fc_fabric_login(lp);
+
+        dev_hold(netdev);
+
+        return rc;
+
+out_lp_destroy:
+        fc_exch_mgr_free(lp->emp); /* Free the EM */
+out_host_put:
+        scsi_host_put(lp->host);
+        return rc;
+}
+
+/**
+ * fcoe_if_init() - attach to scsi transport
+ *
+ * Returns : 0 on success
+ */
+static int __init fcoe_if_init(void)
+{
+        /* attach to scsi transport */
+        scsi_transport_fcoe_sw =
+                fc_attach_transport(&fcoe_transport_function);
+
+        if (!scsi_transport_fcoe_sw) {
+                printk(KERN_ERR "fcoe_init:fc_attach_transport() failed\n");
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+/**
+ * fcoe_if_exit() - detach from scsi transport
+ *
+ * Returns : 0 on success
+ */
+int __exit fcoe_if_exit(void)
+{
+        fc_release_transport(scsi_transport_fcoe_sw);
+        return 0;
+}
+
+/**
+ * fcoe_percpu_thread_create() - Create a receive thread for an online cpu
+ * @cpu: cpu index for the online cpu
+ */
+static void fcoe_percpu_thread_create(unsigned int cpu)
+{
+        struct fcoe_percpu_s *p;
+        struct task_struct *thread;
+
+        p = &per_cpu(fcoe_percpu, cpu);
+
+        thread = kthread_create(fcoe_percpu_receive_thread,
+                                (void *)p, "fcoethread/%d", cpu);
+
+        if (likely(!IS_ERR(p->thread))) {
+                kthread_bind(thread, cpu);
+                wake_up_process(thread);
+
+                spin_lock_bh(&p->fcoe_rx_list.lock);
+                p->thread = thread;
+                spin_unlock_bh(&p->fcoe_rx_list.lock);
+        }
+}
+
+/**
+ * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu
+ * @cpu: cpu index the rx thread is to be removed
+ *
+ * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
+ * current CPU's Rx thread. If the thread being destroyed is bound to
+ * the CPU processing this context the skbs will be freed.
+ */
+static void fcoe_percpu_thread_destroy(unsigned int cpu)
+{
+        struct fcoe_percpu_s *p;
+        struct task_struct *thread;
+        struct page *crc_eof;
+        struct sk_buff *skb;
+#ifdef CONFIG_SMP
+        struct fcoe_percpu_s *p0;
+        unsigned targ_cpu = smp_processor_id();
+#endif /* CONFIG_SMP */
+
+        printk(KERN_DEBUG "fcoe: Destroying receive thread for CPU %d\n", cpu);
+
+        /* Prevent any new skbs from being queued for this CPU. */
+        p = &per_cpu(fcoe_percpu, cpu);
+        spin_lock_bh(&p->fcoe_rx_list.lock);
+        thread = p->thread;
+        p->thread = NULL;
+        crc_eof = p->crc_eof_page;
+        p->crc_eof_page = NULL;
+        p->crc_eof_offset = 0;
+        spin_unlock_bh(&p->fcoe_rx_list.lock);
+
+#ifdef CONFIG_SMP
+        /*
+         * Don't bother moving the skb's if this context is running
+         * on the same CPU that is having its thread destroyed. This
+         * can easily happen when the module is removed.
+         */
+        if (cpu != targ_cpu) {
+                p0 = &per_cpu(fcoe_percpu, targ_cpu);
+                spin_lock_bh(&p0->fcoe_rx_list.lock);
+                if (p0->thread) {
+                        FC_DBG("Moving frames from CPU %d to CPU %d\n",
+                               cpu, targ_cpu);
+
+                        while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+                                __skb_queue_tail(&p0->fcoe_rx_list, skb);
+                        spin_unlock_bh(&p0->fcoe_rx_list.lock);
+                } else {
+                        /*
+                         * The targeted CPU is not initialized and cannot accept
+                         * new  skbs. Unlock the targeted CPU and drop the skbs
+                         * on the CPU that is going offline.
+                         */
+                        while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+                                kfree_skb(skb);
+                        spin_unlock_bh(&p0->fcoe_rx_list.lock);
+                }
+        } else {
+                /*
+                 * This scenario occurs when the module is being removed
+                 * and all threads are being destroyed. skbs will continue
+                 * to be shifted from the CPU thread that is being removed
+                 * to the CPU thread associated with the CPU that is processing
+                 * the module removal. Once there is only one CPU Rx thread it
+                 * will reach this case and we will drop all skbs and later
+                 * stop the thread.
+                 */
+                spin_lock_bh(&p->fcoe_rx_list.lock);
+                while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+                        kfree_skb(skb);
+                spin_unlock_bh(&p->fcoe_rx_list.lock);
+        }
+#else
+        /*
+         * This a non-SMP scenario where the singluar Rx thread is
+         * being removed. Free all skbs and stop the thread.
+         */
+        spin_lock_bh(&p->fcoe_rx_list.lock);
+        while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+                kfree_skb(skb);
+        spin_unlock_bh(&p->fcoe_rx_list.lock);
+#endif
+
+        if (thread)
+                kthread_stop(thread);
+
+        if (crc_eof)
+                put_page(crc_eof);
+}
+
+/**
+ * fcoe_cpu_callback() - fcoe cpu hotplug event callback
+ * @nfb: callback data block
+ * @action: event triggering the callback
+ * @hcpu: index for the cpu of this event
+ *
+ * This creates or destroys per cpu data for fcoe
+ *
+ * Returns NOTIFY_OK always.
+ */
+static int fcoe_cpu_callback(struct notifier_block *nfb,
+                             unsigned long action, void *hcpu)
+{
+        unsigned cpu = (unsigned long)hcpu;
+
+        switch (action) {
+        case CPU_ONLINE:
+        case CPU_ONLINE_FROZEN:
+                FC_DBG("CPU %x online: Create Rx thread\n", cpu);
+                fcoe_percpu_thread_create(cpu);
+                break;
+        case CPU_DEAD:
+        case CPU_DEAD_FROZEN:
+                FC_DBG("CPU %x offline: Remove Rx thread\n", cpu);
+                fcoe_percpu_thread_destroy(cpu);
+                break;
+        default:
+                break;
+        }
+        return NOTIFY_OK;
+}
+
+static struct notifier_block fcoe_cpu_notifier = {
+        .notifier_call = fcoe_cpu_callback,
+};
+
+/**
+ * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
+ * @skb: the receive skb
+ * @dev: associated net device
+ * @ptype: context
+ * @odldev: last device
+ *
+ * this function will receive the packet and build fc frame and pass it up
+ *
+ * Returns: 0 for success
+ */
+int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
+             struct packet_type *ptype, struct net_device *olddev)
+{
+        struct fc_lport *lp;
+        struct fcoe_rcv_info *fr;
+        struct fcoe_softc *fc;
+        struct fc_frame_header *fh;
+        struct fcoe_percpu_s *fps;
+        unsigned short oxid;
+        unsigned int cpu = 0;
+
+        fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
+        lp = fc->lp;
+        if (unlikely(lp == NULL)) {
+                FC_DBG("cannot find hba structure");
+                goto err2;
+        }
+
+        if (unlikely(debug_fcoe)) {
+                FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p tail:%p "
+                       "end:%p sum:%d dev:%s", skb->len, skb->data_len,
+                       skb->head, skb->data, skb_tail_pointer(skb),
+                       skb_end_pointer(skb), skb->csum,
+                       skb->dev ? skb->dev->name : "<NULL>");
+
+        }
+
+        /* check for FCOE packet type */
+        if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
+                FC_DBG("wrong FC type frame");
+                goto err;
+        }
+
+        /*
+         * Check for minimum frame length, and make sure required FCoE
+         * and FC headers are pulled into the linear data area.
+         */
+        if (unlikely((skb->len < FCOE_MIN_FRAME) ||
+            !pskb_may_pull(skb, FCOE_HEADER_LEN)))
+                goto err;
+
+        skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
+        fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+        oxid = ntohs(fh->fh_ox_id);
+
+        fr = fcoe_dev_from_skb(skb);
+        fr->fr_dev = lp;
+        fr->ptype = ptype;
+
+#ifdef CONFIG_SMP
+        /*
+         * The incoming frame exchange id(oxid) is ANDed with num of online
+         * cpu bits to get cpu and then this cpu is used for selecting
+         * a per cpu kernel thread from fcoe_percpu.
+         */
+        cpu = oxid & (num_online_cpus() - 1);
+#endif
+
+        fps = &per_cpu(fcoe_percpu, cpu);
+        spin_lock_bh(&fps->fcoe_rx_list.lock);
+        if (unlikely(!fps->thread)) {
+                /*
+                 * The targeted CPU is not ready, let's target
+                 * the first CPU now. For non-SMP systems this
+                 * will check the same CPU twice.
+                 */
+                FC_DBG("CPU is online, but no receive thread ready "
+                       "for incoming skb- using first online CPU.\n");
+
+                spin_unlock_bh(&fps->fcoe_rx_list.lock);
+                cpu = first_cpu(cpu_online_map);
+                fps = &per_cpu(fcoe_percpu, cpu);
+                spin_lock_bh(&fps->fcoe_rx_list.lock);
+                if (!fps->thread) {
+                        spin_unlock_bh(&fps->fcoe_rx_list.lock);
+                        goto err;
+                }
+        }
+
+        /*
+         * We now have a valid CPU that we're targeting for
+         * this skb. We also have this receive thread locked,
+         * so we're free to queue skbs into it's queue.
+         */
+        __skb_queue_tail(&fps->fcoe_rx_list, skb);
+        if (fps->fcoe_rx_list.qlen == 1)
+                wake_up_process(fps->thread);
+
+        spin_unlock_bh(&fps->fcoe_rx_list.lock);
+
+        return 0;
+err:
+        fc_lport_get_stats(lp)->ErrorFrames++;
+
+err2:
+        kfree_skb(skb);
+        return -1;
+}
+EXPORT_SYMBOL_GPL(fcoe_rcv);
+
+/**
+ * fcoe_start_io() - pass to netdev to start xmit for fcoe
+ * @skb: the skb to be xmitted
+ *
+ * Returns: 0 for success
+ */
+static inline int fcoe_start_io(struct sk_buff *skb)
+{
+        int rc;
+
+        skb_get(skb);
+        rc = dev_queue_xmit(skb);
+        if (rc != 0)
+                return rc;
+        kfree_skb(skb);
+        return 0;
+}
+
+/**
+ * fcoe_get_paged_crc_eof() - in case we need alloc a page for crc_eof
+ * @skb: the skb to be xmitted
+ * @tlen: total len
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+{
+        struct fcoe_percpu_s *fps;
+        struct page *page;
+
+        fps = &get_cpu_var(fcoe_percpu);
+        page = fps->crc_eof_page;
+        if (!page) {
+                page = alloc_page(GFP_ATOMIC);
+                if (!page) {
+                        put_cpu_var(fcoe_percpu);
+                        return -ENOMEM;
+                }
+                fps->crc_eof_page = page;
+                fps->crc_eof_offset = 0;
+        }
+
+        get_page(page);
+        skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
+                           fps->crc_eof_offset, tlen);
+        skb->len += tlen;
+        skb->data_len += tlen;
+        skb->truesize += tlen;
+        fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
+
+        if (fps->crc_eof_offset >= PAGE_SIZE) {
+                fps->crc_eof_page = NULL;
+                fps->crc_eof_offset = 0;
+                put_page(page);
+        }
+        put_cpu_var(fcoe_percpu);
+        return 0;
+}
+
+/**
+ * fcoe_fc_crc() - calculates FC CRC in this fcoe skb
+ * @fp: the fc_frame containg data to be checksummed
+ *
+ * This uses crc32() to calculate the crc for fc frame
+ * Return   : 32 bit crc
+ */
+u32 fcoe_fc_crc(struct fc_frame *fp)
+{
+        struct sk_buff *skb = fp_skb(fp);
+        struct skb_frag_struct *frag;
+        unsigned char *data;
+        unsigned long off, len, clen;
+        u32 crc;
+        unsigned i;
+
+        crc = crc32(~0, skb->data, skb_headlen(skb));
+
+        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+                frag = &skb_shinfo(skb)->frags[i];
+                off = frag->page_offset;
+                len = frag->size;
+                while (len > 0) {
+                        clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
+                        data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
+                                           KM_SKB_DATA_SOFTIRQ);
+                        crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
+                        kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
+                        off += clen;
+                        len -= clen;
+                }
+        }
+        return crc;
+}
+EXPORT_SYMBOL_GPL(fcoe_fc_crc);
+
+/**
+ * fcoe_xmit() - FCoE frame transmit function
+ * @lp: the associated local port
+ * @fp: the fc_frame to be transmitted
+ *
+ * Return   : 0 for success
+ */
+int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+{
+        int wlen, rc = 0;
+        u32 crc;
+        struct ethhdr *eh;
+        struct fcoe_crc_eof *cp;
+        struct sk_buff *skb;
+        struct fcoe_dev_stats *stats;
+        struct fc_frame_header *fh;
+        unsigned int hlen;              /* header length implies the version */
+        unsigned int tlen;              /* trailer length */
+        unsigned int elen;              /* eth header, may include vlan */
+        int flogi_in_progress = 0;
+        struct fcoe_softc *fc;
+        u8 sof, eof;
+        struct fcoe_hdr *hp;
+
+        WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
+
+        fc = lport_priv(lp);
+        /*
+         * if it is a flogi then we need to learn gw-addr
+         * and my own fcid
+         */
+        fh = fc_frame_header_get(fp);
+        if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
+                if (fc_frame_payload_op(fp) == ELS_FLOGI) {
+                        fc->flogi_oxid = ntohs(fh->fh_ox_id);
+                        fc->address_mode = FCOE_FCOUI_ADDR_MODE;
+                        fc->flogi_progress = 1;
+                        flogi_in_progress = 1;
+                } else if (fc->flogi_progress && ntoh24(fh->fh_s_id) != 0) {
+                        /*
+                         * Here we must've gotten an SID by accepting an FLOGI
+                         * from a point-to-point connection.  Switch to using
+                         * the source mac based on the SID.  The destination
+                         * MAC in this case would have been set by receving the
+                         * FLOGI.
+                         */
+                        fc_fcoe_set_mac(fc->data_src_addr, fh->fh_s_id);
+                        fc->flogi_progress = 0;
+                }
+        }
+
+        skb = fp_skb(fp);
+        sof = fr_sof(fp);
+        eof = fr_eof(fp);
+
+        elen = (fc->real_dev->priv_flags & IFF_802_1Q_VLAN) ?
+                sizeof(struct vlan_ethhdr) : sizeof(struct ethhdr);
+        hlen = sizeof(struct fcoe_hdr);
+        tlen = sizeof(struct fcoe_crc_eof);
+        wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
+
+        /* crc offload */
+        if (likely(lp->crc_offload)) {
+                skb->ip_summed = CHECKSUM_PARTIAL;
+                skb->csum_start = skb_headroom(skb);
+                skb->csum_offset = skb->len;
+                crc = 0;
+        } else {
+                skb->ip_summed = CHECKSUM_NONE;
+                crc = fcoe_fc_crc(fp);
+        }
+
+        /* copy fc crc and eof to the skb buff */
+        if (skb_is_nonlinear(skb)) {
+                skb_frag_t *frag;
+                if (fcoe_get_paged_crc_eof(skb, tlen)) {
+                        kfree_skb(skb);
+                        return -ENOMEM;
+                }
+                frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
+                cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
+                        + frag->page_offset;
+        } else {
+                cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
+        }
+
+        memset(cp, 0, sizeof(*cp));
+        cp->fcoe_eof = eof;
+        cp->fcoe_crc32 = cpu_to_le32(~crc);
+
+        if (skb_is_nonlinear(skb)) {
+                kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
+                cp = NULL;
+        }
+
+        /* adjust skb netowrk/transport offsets to match mac/fcoe/fc */
+        skb_push(skb, elen + hlen);
+        skb_reset_mac_header(skb);
+        skb_reset_network_header(skb);
+        skb->mac_len = elen;
+        skb->protocol = htons(ETH_P_FCOE);
+        skb->dev = fc->real_dev;
+
+        /* fill up mac and fcoe headers */
+        eh = eth_hdr(skb);
+        eh->h_proto = htons(ETH_P_FCOE);
+        if (fc->address_mode == FCOE_FCOUI_ADDR_MODE)
+                fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
+        else
+                /* insert GW address */
+                memcpy(eh->h_dest, fc->dest_addr, ETH_ALEN);
+
+        if (unlikely(flogi_in_progress))
+                memcpy(eh->h_source, fc->ctl_src_addr, ETH_ALEN);
+        else
+                memcpy(eh->h_source, fc->data_src_addr, ETH_ALEN);
+
+        hp = (struct fcoe_hdr *)(eh + 1);
+        memset(hp, 0, sizeof(*hp));
+        if (FC_FCOE_VER)
+                FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
+        hp->fcoe_sof = sof;
+
+#ifdef NETIF_F_FSO
+        /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
+        if (lp->seq_offload && fr_max_payload(fp)) {
+                skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
+                skb_shinfo(skb)->gso_size = fr_max_payload(fp);
+        } else {
+                skb_shinfo(skb)->gso_type = 0;
+                skb_shinfo(skb)->gso_size = 0;
+        }
+#endif
+        /* update tx stats: regardless if LLD fails */
+        stats = fc_lport_get_stats(lp);
+        stats->TxFrames++;
+        stats->TxWords += wlen;
+
+        /* send down to lld */
+        fr_dev(fp) = lp;
+        if (fc->fcoe_pending_queue.qlen)
+                rc = fcoe_check_wait_queue(lp);
+
+        if (rc == 0)
+                rc = fcoe_start_io(skb);
+
+        if (rc) {
+                spin_lock_bh(&fc->fcoe_pending_queue.lock);
+                __skb_queue_tail(&fc->fcoe_pending_queue, skb);
+                spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+                if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+                        lp->qfull = 1;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_xmit);
+
+/**
+ * fcoe_percpu_receive_thread() - recv thread per cpu
+ * @arg: ptr to the fcoe per cpu struct
+ *
+ * Return: 0 for success
+ */
+int fcoe_percpu_receive_thread(void *arg)
+{
+        struct fcoe_percpu_s *p = arg;
+        u32 fr_len;
+        struct fc_lport *lp;
+        struct fcoe_rcv_info *fr;
+        struct fcoe_dev_stats *stats;
+        struct fc_frame_header *fh;
+        struct sk_buff *skb;
+        struct fcoe_crc_eof crc_eof;
+        struct fc_frame *fp;
+        u8 *mac = NULL;
+        struct fcoe_softc *fc;
+        struct fcoe_hdr *hp;
+
+        set_user_nice(current, -20);
+
+        while (!kthread_should_stop()) {
+
+                spin_lock_bh(&p->fcoe_rx_list.lock);
+                while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
+                        set_current_state(TASK_INTERRUPTIBLE);
+                        spin_unlock_bh(&p->fcoe_rx_list.lock);
+                        schedule();
+                        set_current_state(TASK_RUNNING);
+                        if (kthread_should_stop())
+                                return 0;
+                        spin_lock_bh(&p->fcoe_rx_list.lock);
+                }
+                spin_unlock_bh(&p->fcoe_rx_list.lock);
+                fr = fcoe_dev_from_skb(skb);
+                lp = fr->fr_dev;
+                if (unlikely(lp == NULL)) {
+                        FC_DBG("invalid HBA Structure");
+                        kfree_skb(skb);
+                        continue;
+                }
+
+                if (unlikely(debug_fcoe)) {
+                        FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p "
+                               "tail:%p end:%p sum:%d dev:%s",
+                               skb->len, skb->data_len,
+                               skb->head, skb->data, skb_tail_pointer(skb),
+                               skb_end_pointer(skb), skb->csum,
+                               skb->dev ? skb->dev->name : "<NULL>");
+                }
+
+                /*
+                 * Save source MAC address before discarding header.
+                 */
+                fc = lport_priv(lp);
+                if (unlikely(fc->flogi_progress))
+                        mac = eth_hdr(skb)->h_source;
+
+                if (skb_is_nonlinear(skb))
+                        skb_linearize(skb);     /* not ideal */
+
+                /*
+                 * Frame length checks and setting up the header pointers
+                 * was done in fcoe_rcv already.
+                 */
+                hp = (struct fcoe_hdr *) skb_network_header(skb);
+                fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+                stats = fc_lport_get_stats(lp);
+                if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+                        if (stats->ErrorFrames < 5)
+                                printk(KERN_WARNING "FCoE version "
+                                       "mismatch: The frame has "
+                                       "version %x, but the "
+                                       "initiator supports version "
+                                       "%x\n", FC_FCOE_DECAPS_VER(hp),
+                                       FC_FCOE_VER);
+                        stats->ErrorFrames++;
+                        kfree_skb(skb);
+                        continue;
+                }
+
+                skb_pull(skb, sizeof(struct fcoe_hdr));
+                fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+
+                stats->RxFrames++;
+                stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
+
+                fp = (struct fc_frame *)skb;
+                fc_frame_init(fp);
+                fr_dev(fp) = lp;
+                fr_sof(fp) = hp->fcoe_sof;
+
+                /* Copy out the CRC and EOF trailer for access */
+                if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
+                        kfree_skb(skb);
+                        continue;
+                }
+                fr_eof(fp) = crc_eof.fcoe_eof;
+                fr_crc(fp) = crc_eof.fcoe_crc32;
+                if (pskb_trim(skb, fr_len)) {
+                        kfree_skb(skb);
+                        continue;
+                }
+
+                /*
+                 * We only check CRC if no offload is available and if it is
+                 * it's solicited data, in which case, the FCP layer would
+                 * check it during the copy.
+                 */
+                if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
+                        fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+                else
+                        fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+
+                fh = fc_frame_header_get(fp);
+                if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
+                    fh->fh_type == FC_TYPE_FCP) {
+                        fc_exch_recv(lp, lp->emp, fp);
+                        continue;
+                }
+                if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
+                        if (le32_to_cpu(fr_crc(fp)) !=
+                            ~crc32(~0, skb->data, fr_len)) {
+                                if (debug_fcoe || stats->InvalidCRCCount < 5)
+                                        printk(KERN_WARNING "fcoe: dropping "
+                                               "frame with CRC error\n");
+                                stats->InvalidCRCCount++;
+                                stats->ErrorFrames++;
+                                fc_frame_free(fp);
+                                continue;
+                        }
+                        fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+                }
+                /* non flogi and non data exchanges are handled here */
+                if (unlikely(fc->flogi_progress))
+                        fcoe_recv_flogi(fc, fp, mac);
+                fc_exch_recv(lp, lp->emp, fp);
+        }
+        return 0;
+}
+
+/**
+ * fcoe_recv_flogi() - flogi receive function
+ * @fc: associated fcoe_softc
+ * @fp: the recieved frame
+ * @sa: the source address of this flogi
+ *
+ * This is responsible to parse the flogi response and sets the corresponding
+ * mac address for the initiator, eitehr OUI based or GW based.
+ *
+ * Returns: none
+ */
+static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa)
+{
+        struct fc_frame_header *fh;
+        u8 op;
+
+        fh = fc_frame_header_get(fp);
+        if (fh->fh_type != FC_TYPE_ELS)
+                return;
+        op = fc_frame_payload_op(fp);
+        if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+            fc->flogi_oxid == ntohs(fh->fh_ox_id)) {
+                /*
+                 * FLOGI accepted.
+                 * If the src mac addr is FC_OUI-based, then we mark the
+                 * address_mode flag to use FC_OUI-based Ethernet DA.
+                 * Otherwise we use the FCoE gateway addr
+                 */
+                if (!compare_ether_addr(sa, (u8[6]) FC_FCOE_FLOGI_MAC)) {
+                        fc->address_mode = FCOE_FCOUI_ADDR_MODE;
+                } else {
+                        memcpy(fc->dest_addr, sa, ETH_ALEN);
+                        fc->address_mode = FCOE_GW_ADDR_MODE;
+                }
+
+                /*
+                 * Remove any previously-set unicast MAC filter.
+                 * Add secondary FCoE MAC address filter for our OUI.
+                 */
+                rtnl_lock();
+                if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
+                        dev_unicast_delete(fc->real_dev, fc->data_src_addr,
+                                           ETH_ALEN);
+                fc_fcoe_set_mac(fc->data_src_addr, fh->fh_d_id);
+                dev_unicast_add(fc->real_dev, fc->data_src_addr, ETH_ALEN);
+                rtnl_unlock();
+
+                fc->flogi_progress = 0;
+        } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+                /*
+                 * Save source MAC for point-to-point responses.
+                 */
+                memcpy(fc->dest_addr, sa, ETH_ALEN);
+                fc->address_mode = FCOE_GW_ADDR_MODE;
+        }
+}
+
+/**
+ * fcoe_watchdog() - fcoe timer callback
+ * @vp:
+ *
+ * This checks the pending queue length for fcoe and set lport qfull
+ * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the
+ * fcoe_hostlist.
+ *
+ * Returns: 0 for success
+ */
+void fcoe_watchdog(ulong vp)
+{
+        struct fcoe_softc *fc;
+
+        read_lock(&fcoe_hostlist_lock);
+        list_for_each_entry(fc, &fcoe_hostlist, list) {
+                if (fc->lp)
+                        fcoe_check_wait_queue(fc->lp);
+        }
+        read_unlock(&fcoe_hostlist_lock);
+
+        fcoe_timer.expires = jiffies + (1 * HZ);
+        add_timer(&fcoe_timer);
+}
+
+
+/**
+ * fcoe_check_wait_queue() - put the skb into fcoe pending xmit queue
+ * @lp: the fc_port for this skb
+ * @skb: the associated skb to be xmitted
+ *
+ * This empties the wait_queue, dequeue the head of the wait_queue queue
+ * and calls fcoe_start_io() for each packet, if all skb have been
+ * transmitted, return qlen or -1 if a error occurs, then restore
+ * wait_queue and  try again later.
+ *
+ * The wait_queue is used when the skb transmit fails. skb will go
+ * in the wait_queue which will be emptied by the time function OR
+ * by the next skb transmit.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_check_wait_queue(struct fc_lport *lp)
+{
+        struct fcoe_softc *fc = lport_priv(lp);
+        struct sk_buff *skb;
+        int rc = -1;
+
+        spin_lock_bh(&fc->fcoe_pending_queue.lock);
+        if (fc->fcoe_pending_queue_active)
+                goto out;
+        fc->fcoe_pending_queue_active = 1;
+
+        while (fc->fcoe_pending_queue.qlen) {
+                /* keep qlen > 0 until fcoe_start_io succeeds */
+                fc->fcoe_pending_queue.qlen++;
+                skb = __skb_dequeue(&fc->fcoe_pending_queue);
+
+                spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+                rc = fcoe_start_io(skb);
+                spin_lock_bh(&fc->fcoe_pending_queue.lock);
+
+                if (rc) {
+                        __skb_queue_head(&fc->fcoe_pending_queue, skb);
+                        /* undo temporary increment above */
+                        fc->fcoe_pending_queue.qlen--;
+                        break;
+                }
+                /* undo temporary increment above */
+                fc->fcoe_pending_queue.qlen--;
+        }
+
+        if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
+                lp->qfull = 0;
+        fc->fcoe_pending_queue_active = 0;
+        rc = fc->fcoe_pending_queue.qlen;
+out:
+        spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+        return rc;
+}
+
+/**
+ * fcoe_dev_setup() - setup link change notification interface
+ */
+static void fcoe_dev_setup()
+{
+        /*
+         * here setup a interface specific wd time to
+         * monitor the link state
+         */
+        register_netdevice_notifier(&fcoe_notifier);
+}
+
+/**
+ * fcoe_dev_setup() - cleanup link change notification interface
+ */
+static void fcoe_dev_cleanup(void)
+{
+        unregister_netdevice_notifier(&fcoe_notifier);
+}
+
+/**
+ * fcoe_device_notification() - netdev event notification callback
+ * @notifier: context of the notification
+ * @event: type of event
+ * @ptr: fixed array for output parsed ifname
+ *
+ * This function is called by the ethernet driver in case of link change event
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_device_notification(struct notifier_block *notifier,
+                                    ulong event, void *ptr)
+{
+        struct fc_lport *lp = NULL;
+        struct net_device *real_dev = ptr;
+        struct fcoe_softc *fc;
+        struct fcoe_dev_stats *stats;
+        u32 new_link_up;
+        u32 mfs;
+        int rc = NOTIFY_OK;
+
+        read_lock(&fcoe_hostlist_lock);
+        list_for_each_entry(fc, &fcoe_hostlist, list) {
+                if (fc->real_dev == real_dev) {
+                        lp = fc->lp;
+                        break;
+                }
+        }
+        read_unlock(&fcoe_hostlist_lock);
+        if (lp == NULL) {
+                rc = NOTIFY_DONE;
+                goto out;
+        }
+
+        new_link_up = lp->link_up;
+        switch (event) {
+        case NETDEV_DOWN:
+        case NETDEV_GOING_DOWN:
+                new_link_up = 0;
+                break;
+        case NETDEV_UP:
+        case NETDEV_CHANGE:
+                new_link_up = !fcoe_link_ok(lp);
+                break;
+        case NETDEV_CHANGEMTU:
+                mfs = fc->real_dev->mtu -
+                        (sizeof(struct fcoe_hdr) +
+                         sizeof(struct fcoe_crc_eof));
+                if (mfs >= FC_MIN_MAX_FRAME)
+                        fc_set_mfs(lp, mfs);
+                new_link_up = !fcoe_link_ok(lp);
+                break;
+        case NETDEV_REGISTER:
+                break;
+        default:
+                FC_DBG("unknown event %ld call", event);
+        }
+        if (lp->link_up != new_link_up) {
+                if (new_link_up)
+                        fc_linkup(lp);
+                else {
+                        stats = fc_lport_get_stats(lp);
+                        stats->LinkFailureCount++;
+                        fc_linkdown(lp);
+                        fcoe_clean_pending_queue(lp);
+                }
+        }
+out:
+        return rc;
+}
+
+/**
+ * fcoe_if_to_netdev() - parse a name buffer to get netdev
+ * @ifname: fixed array for output parsed ifname
+ * @buffer: incoming buffer to be copied
+ *
+ * Returns: NULL or ptr to netdeive
+ */
+static struct net_device *fcoe_if_to_netdev(const char *buffer)
+{
+        char *cp;
+        char ifname[IFNAMSIZ + 2];
+
+        if (buffer) {
+                strlcpy(ifname, buffer, IFNAMSIZ);
+                cp = ifname + strlen(ifname);
+                while (--cp >= ifname && *cp == '\n')
+                        *cp = '\0';
+                return dev_get_by_name(&init_net, ifname);
+        }
+        return NULL;
+}
+
+/**
+ * fcoe_netdev_to_module_owner() - finds out the nic drive moddule of the netdev
+ * @netdev: the target netdev
+ *
+ * Returns: ptr to the struct module, NULL for failure
+ */
+static struct module *
+fcoe_netdev_to_module_owner(const struct net_device *netdev)
+{
+        struct device *dev;
+
+        if (!netdev)
+                return NULL;
+
+        dev = netdev->dev.parent;
+        if (!dev)
+                return NULL;
+
+        if (!dev->driver)
+                return NULL;
+
+        return dev->driver->owner;
+}
+
+/**
+ * fcoe_ethdrv_get() - Hold the Ethernet driver
+ * @netdev: the target netdev
+ *
+ * Holds the Ethernet driver module by try_module_get() for
+ * the corresponding netdev.
+ *
+ * Returns: 0 for succsss
+ */
+static int fcoe_ethdrv_get(const struct net_device *netdev)
+{
+        struct module *owner;
+
+        owner = fcoe_netdev_to_module_owner(netdev);
+        if (owner) {
+                printk(KERN_DEBUG "fcoe:hold driver module %s for %s\n",
+                       module_name(owner), netdev->name);
+                return  try_module_get(owner);
+        }
+        return -ENODEV;
+}
+
+/**
+ * fcoe_ethdrv_put() - Release the Ethernet driver
+ * @netdev: the target netdev
+ *
+ * Releases the Ethernet driver module by module_put for
+ * the corresponding netdev.
+ *
+ * Returns: 0 for succsss
+ */
+static int fcoe_ethdrv_put(const struct net_device *netdev)
+{
+        struct module *owner;
+
+        owner = fcoe_netdev_to_module_owner(netdev);
+        if (owner) {
+                printk(KERN_DEBUG "fcoe:release driver module %s for %s\n",
+                       module_name(owner), netdev->name);
+                module_put(owner);
+                return 0;
+        }
+        return -ENODEV;
+}
+
+/**
+ * fcoe_destroy() - handles the destroy from sysfs
+ * @buffer: expcted to be a eth if name
+ * @kp: associated kernel param
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
+{
+        int rc;
+        struct net_device *netdev;
+
+        netdev = fcoe_if_to_netdev(buffer);
+        if (!netdev) {
+                rc = -ENODEV;
+                goto out_nodev;
+        }
+        /* look for existing lport */
+        if (!fcoe_hostlist_lookup(netdev)) {
+                rc = -ENODEV;
+                goto out_putdev;
+        }
+        rc = fcoe_if_destroy(netdev);
+        if (rc) {
+                printk(KERN_ERR "fcoe: fcoe_if_destroy(%s) failed\n",
+                       netdev->name);
+                rc = -EIO;
+                goto out_putdev;
+        }
+        fcoe_ethdrv_put(netdev);
+        rc = 0;
+out_putdev:
+        dev_put(netdev);
+out_nodev:
+        return rc;
+}
+
+/**
+ * fcoe_create() - Handles the create call from sysfs
+ * @buffer: expcted to be a eth if name
+ * @kp: associated kernel param
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_create(const char *buffer, struct kernel_param *kp)
+{
+        int rc;
+        struct net_device *netdev;
+
+        netdev = fcoe_if_to_netdev(buffer);
+        if (!netdev) {
+                rc = -ENODEV;
+                goto out_nodev;
+        }
+        /* look for existing lport */
+        if (fcoe_hostlist_lookup(netdev)) {
+                rc = -EEXIST;
+                goto out_putdev;
+        }
+        fcoe_ethdrv_get(netdev);
+
+        rc = fcoe_if_create(netdev);
+        if (rc) {
+                printk(KERN_ERR "fcoe: fcoe_if_create(%s) failed\n",
+                       netdev->name);
+                fcoe_ethdrv_put(netdev);
+                rc = -EIO;
+                goto out_putdev;
+        }
+        rc = 0;
+out_putdev:
+        dev_put(netdev);
+out_nodev:
+        return rc;
+}
+
+module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(create, "string");
+MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
+module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(destroy, "string");
+MODULE_PARM_DESC(destroy, "Destroy fcoe port");
+
+/**
+ * fcoe_link_ok() - Check if link is ok for the fc_lport
+ * @lp: ptr to the fc_lport
+ *
+ * Any permanently-disqualifying conditions have been previously checked.
+ * This also updates the speed setting, which may change with link for 100/1000.
+ *
+ * This function should probably be checking for PAUSE support at some point
+ * in the future. Currently Per-priority-pause is not determinable using
+ * ethtool, so we shouldn't be restrictive until that problem is resolved.
+ *
+ * Returns: 0 if link is OK for use by FCoE.
+ *
+ */
+int fcoe_link_ok(struct fc_lport *lp)
+{
+        struct fcoe_softc *fc = lport_priv(lp);
+        struct net_device *dev = fc->real_dev;
+        struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+        int rc = 0;
+
+        if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
+                dev = fc->phys_dev;
+                if (dev->ethtool_ops->get_settings) {
+                        dev->ethtool_ops->get_settings(dev, &ecmd);
+                        lp->link_supported_speeds &=
+                                ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
+                        if (ecmd.supported & (SUPPORTED_1000baseT_Half |
+                                              SUPPORTED_1000baseT_Full))
+                                lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+                        if (ecmd.supported & SUPPORTED_10000baseT_Full)
+                                lp->link_supported_speeds |=
+                                        FC_PORTSPEED_10GBIT;
+                        if (ecmd.speed == SPEED_1000)
+                                lp->link_speed = FC_PORTSPEED_1GBIT;
+                        if (ecmd.speed == SPEED_10000)
+                                lp->link_speed = FC_PORTSPEED_10GBIT;
+                }
+        } else
+                rc = -1;
+
+        return rc;
+}
+EXPORT_SYMBOL_GPL(fcoe_link_ok);
+
+/**
+ * fcoe_percpu_clean() - Clear the pending skbs for an lport
+ * @lp: the fc_lport
+ */
+void fcoe_percpu_clean(struct fc_lport *lp)
+{
+        struct fcoe_percpu_s *pp;
+        struct fcoe_rcv_info *fr;
+        struct sk_buff_head *list;
+        struct sk_buff *skb, *next;
+        struct sk_buff *head;
+        unsigned int cpu;
+
+        for_each_possible_cpu(cpu) {
+                pp = &per_cpu(fcoe_percpu, cpu);
+                spin_lock_bh(&pp->fcoe_rx_list.lock);
+                list = &pp->fcoe_rx_list;
+                head = list->next;
+                for (skb = head; skb != (struct sk_buff *)list;
+                     skb = next) {
+                        next = skb->next;
+                        fr = fcoe_dev_from_skb(skb);
+                        if (fr->fr_dev == lp) {
+                                __skb_unlink(skb, list);
+                                kfree_skb(skb);
+                        }
+                }
+                spin_unlock_bh(&pp->fcoe_rx_list.lock);
+        }
+}
+EXPORT_SYMBOL_GPL(fcoe_percpu_clean);
+
+/**
+ * fcoe_clean_pending_queue() - Dequeue a skb and free it
+ * @lp: the corresponding fc_lport
+ *
+ * Returns: none
+ */
+void fcoe_clean_pending_queue(struct fc_lport *lp)
+{
+        struct fcoe_softc  *fc = lport_priv(lp);
+        struct sk_buff *skb;
+
+        spin_lock_bh(&fc->fcoe_pending_queue.lock);
+        while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
+                spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+                kfree_skb(skb);
+                spin_lock_bh(&fc->fcoe_pending_queue.lock);
+        }
+        spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
+
+/**
+ * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
+ * @sht: ptr to the scsi host templ
+ * @priv_size: size of private data after fc_lport
+ *
+ * Returns: ptr to Scsi_Host
+ * TODO: to libfc?
+ */
+static inline struct Scsi_Host *
+libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
+{
+        return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
+}
+
+/**
+ * fcoe_host_alloc() - Allocate a Scsi_Host with room for the fcoe_softc
+ * @sht: ptr to the scsi host templ
+ * @priv_size: size of private data after fc_lport
+ *
+ * Returns: ptr to Scsi_Host
+ */
+struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *sht, int priv_size)
+{
+        return libfc_host_alloc(sht, sizeof(struct fcoe_softc) + priv_size);
+}
+EXPORT_SYMBOL_GPL(fcoe_host_alloc);
+
+/**
+ * fcoe_reset() - Resets the fcoe
+ * @shost: shost the reset is from
+ *
+ * Returns: always 0
+ */
+int fcoe_reset(struct Scsi_Host *shost)
+{
+        struct fc_lport *lport = shost_priv(shost);
+        fc_lport_reset(lport);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_reset);
+
+/**
+ * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN.
+ * @mac: mac address
+ * @scheme: check port
+ * @port: port indicator for converting
+ *
+ * Returns: u64 fc world wide name
+ */
+u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
+                      unsigned int scheme, unsigned int port)
+{
+        u64 wwn;
+        u64 host_mac;
+
+        /* The MAC is in NO, so flip only the low 48 bits */
+        host_mac = ((u64) mac[0] << 40) |
+                ((u64) mac[1] << 32) |
+                ((u64) mac[2] << 24) |
+                ((u64) mac[3] << 16) |
+                ((u64) mac[4] << 8) |
+                (u64) mac[5];
+
+        WARN_ON(host_mac >= (1ULL << 48));
+        wwn = host_mac | ((u64) scheme << 60);
+        switch (scheme) {
+        case 1:
+                WARN_ON(port != 0);
+                break;
+        case 2:
+                WARN_ON(port >= 0xfff);
+                wwn |= (u64) port << 48;
+                break;
+        default:
+                WARN_ON(1);
+                break;
+        }
+
+        return wwn;
+}
+EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
+
+/**
+ * fcoe_hostlist_lookup_softc() - find the corresponding lport by a given device
+ * @device: this is currently ptr to net_device
+ *
+ * Returns: NULL or the located fcoe_softc
+ */
+static struct fcoe_softc *
+fcoe_hostlist_lookup_softc(const struct net_device *dev)
+{
+        struct fcoe_softc *fc;
+
+        read_lock(&fcoe_hostlist_lock);
+        list_for_each_entry(fc, &fcoe_hostlist, list) {
+                if (fc->real_dev == dev) {
+                        read_unlock(&fcoe_hostlist_lock);
+                        return fc;
+                }
+        }
+        read_unlock(&fcoe_hostlist_lock);
+        return NULL;
+}
+
+/**
+ * fcoe_hostlist_lookup() - Find the corresponding lport by netdev
+ * @netdev: ptr to net_device
+ *
+ * Returns: 0 for success
+ */
+struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
+{
+        struct fcoe_softc *fc;
+
+        fc = fcoe_hostlist_lookup_softc(netdev);
+
+        return (fc) ? fc->lp : NULL;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_lookup);
+
+/**
+ * fcoe_hostlist_add() - Add a lport to lports list
+ * @lp: ptr to the fc_lport to badded
+ *
+ * Returns: 0 for success
+ */
+int fcoe_hostlist_add(const struct fc_lport *lp)
+{
+        struct fcoe_softc *fc;
+
+        fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
+        if (!fc) {
+                fc = lport_priv(lp);
+                write_lock_bh(&fcoe_hostlist_lock);
+                list_add_tail(&fc->list, &fcoe_hostlist);
+                write_unlock_bh(&fcoe_hostlist_lock);
+        }
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_add);
+
+/**
+ * fcoe_hostlist_remove() - remove a lport from lports list
+ * @lp: ptr to the fc_lport to badded
+ *
+ * Returns: 0 for success
+ */
+int fcoe_hostlist_remove(const struct fc_lport *lp)
+{
+        struct fcoe_softc *fc;
+
+        fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
+        BUG_ON(!fc);
+        write_lock_bh(&fcoe_hostlist_lock);
+        list_del(&fc->list);
+        write_unlock_bh(&fcoe_hostlist_lock);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_remove);
+
+/**
+ * fcoe_libfc_config() - sets up libfc related properties for lport
+ * @lp: ptr to the fc_lport
+ * @tt: libfc function template
+ *
+ * Returns : 0 for success
+ */
+int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
+{
+        /* Set the function pointers set by the LLDD */
+        memcpy(&lp->tt, tt, sizeof(*tt));
+        if (fc_fcp_init(lp))
+                return -ENOMEM;
+        fc_exch_init(lp);
+        fc_elsct_init(lp);
+        fc_lport_init(lp);
+        fc_rport_init(lp);
+        fc_disc_init(lp);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_libfc_config);
+
+/**
+ * fcoe_init() - fcoe module loading initialization
+ *
+ * Returns 0 on success, negative on failure
+ */
+static int __init fcoe_init(void)
+{
+        unsigned int cpu;
+        int rc = 0;
+        struct fcoe_percpu_s *p;
+
+        INIT_LIST_HEAD(&fcoe_hostlist);
+        rwlock_init(&fcoe_hostlist_lock);
+
+        for_each_possible_cpu(cpu) {
+                p = &per_cpu(fcoe_percpu, cpu);
+                skb_queue_head_init(&p->fcoe_rx_list);
+        }
+
+        for_each_online_cpu(cpu)
+                fcoe_percpu_thread_create(cpu);
+
+        /* Initialize per CPU interrupt thread */
+        rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
+        if (rc)
+                goto out_free;
+
+        /* Setup link change notification */
+        fcoe_dev_setup();
+
+        setup_timer(&fcoe_timer, fcoe_watchdog, 0);
+
+        mod_timer(&fcoe_timer, jiffies + (10 * HZ));
+
+        fcoe_if_init();
+
+        return 0;
+
+out_free:
+        for_each_online_cpu(cpu) {
+                fcoe_percpu_thread_destroy(cpu);
+        }
+
+        return rc;
+}
+module_init(fcoe_init);
+
+/**
+ * fcoe_exit() - fcoe module unloading cleanup
+ *
+ * Returns 0 on success, negative on failure
+ */
+static void __exit fcoe_exit(void)
+{
+        unsigned int cpu;
+        struct fcoe_softc *fc, *tmp;
+
+        fcoe_dev_cleanup();
+
+        /* Stop the timer */
+        del_timer_sync(&fcoe_timer);
+
+        /* releases the associated fcoe hosts */
+        list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
+                fcoe_if_destroy(fc->real_dev);
+
+        unregister_hotcpu_notifier(&fcoe_cpu_notifier);
+
+        for_each_online_cpu(cpu) {
+                fcoe_percpu_thread_destroy(cpu);
+        }
+
+        /* detach from scsi transport */
+        fcoe_if_exit();
+}
+module_exit(fcoe_exit);