/* bnx2fc_fcoe.c: QLogic Linux FCoE offload driver.
 * This file contains the code that interacts with libfc, libfcoe,
 * cnic modules to create FCoE instances, send/receive non-offloaded
 * FIP/FCoE packets, listen to link events etc.
 *
 * Copyright (c) 2008-2013 Broadcom Corporation
 * Copyright (c) 2014-2016 QLogic Corporation
 * Copyright (c) 2016-2017 Cavium Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Written by: Bhanu Prakash Gollapudi (bprakash@broadcom.com)
 */

#include "bnx2fc.h"

#include <linux/ethtool.h>

static struct list_head adapter_list;
static struct list_head if_list;
static u32 adapter_count;
static DEFINE_MUTEX(bnx2fc_dev_lock);
DEFINE_PER_CPU(struct bnx2fc_percpu_s, bnx2fc_percpu);

#define DRV_MODULE_NAME         "bnx2fc"
#define DRV_MODULE_VERSION      BNX2FC_VERSION
#define DRV_MODULE_RELDATE      "October 15, 2015"


static char version[] =
                "QLogic FCoE Driver " DRV_MODULE_NAME \
                " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";


MODULE_AUTHOR("Bhanu Prakash Gollapudi <bprakash@broadcom.com>");
MODULE_DESCRIPTION("QLogic FCoE Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);

#define BNX2FC_MAX_QUEUE_DEPTH  256
#define BNX2FC_MIN_QUEUE_DEPTH  32
#define FCOE_WORD_TO_BYTE  4

static struct scsi_transport_template   *bnx2fc_transport_template;
static struct scsi_transport_template   *bnx2fc_vport_xport_template;

struct workqueue_struct *bnx2fc_wq;

/* bnx2fc structure needs only one instance of the fcoe_percpu_s structure.
 * Here the io threads are per cpu but the l2 thread is just one
 */
struct fcoe_percpu_s bnx2fc_global;
static DEFINE_SPINLOCK(bnx2fc_global_lock);

static struct cnic_ulp_ops bnx2fc_cnic_cb;
static struct libfc_function_template bnx2fc_libfc_fcn_templ;
static struct scsi_host_template bnx2fc_shost_template;
static struct fc_function_template bnx2fc_transport_function;
static struct fcoe_sysfs_function_template bnx2fc_fcoe_sysfs_templ;
static struct fc_function_template bnx2fc_vport_xport_function;
static int bnx2fc_create(struct net_device *netdev, enum fip_mode fip_mode);
static void __bnx2fc_destroy(struct bnx2fc_interface *interface);
static int bnx2fc_destroy(struct net_device *net_device);
static int bnx2fc_enable(struct net_device *netdev);
static int bnx2fc_disable(struct net_device *netdev);

/* fcoe_syfs control interface handlers */
static int bnx2fc_ctlr_alloc(struct net_device *netdev);
static int bnx2fc_ctlr_enabled(struct fcoe_ctlr_device *cdev);

static void bnx2fc_recv_frame(struct sk_buff *skb);

static void bnx2fc_start_disc(struct bnx2fc_interface *interface);
static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev);
static int bnx2fc_lport_config(struct fc_lport *lport);
static int bnx2fc_em_config(struct fc_lport *lport, struct bnx2fc_hba *hba);
static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba);
static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba);
static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba);
static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba);
static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface,
                                  struct device *parent, int npiv);
static void bnx2fc_destroy_work(struct work_struct *work);

static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device *phys_dev);
static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device
                                                        *phys_dev);
static inline void bnx2fc_interface_put(struct bnx2fc_interface *interface);
static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic);

static int bnx2fc_fw_init(struct bnx2fc_hba *hba);
static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba);

static void bnx2fc_port_shutdown(struct fc_lport *lport);
static void bnx2fc_stop(struct bnx2fc_interface *interface);
static int __init bnx2fc_mod_init(void);
static void __exit bnx2fc_mod_exit(void);

unsigned int bnx2fc_debug_level;
module_param_named(debug_logging, bnx2fc_debug_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(debug_logging,
                "Option to enable extended logging,\n"
                "\t\tDefault is 0 - no logging.\n"
                "\t\t0x01 - SCSI cmd error, cleanup.\n"
                "\t\t0x02 - Session setup, cleanup, etc.\n"
                "\t\t0x04 - lport events, link, mtu, etc.\n"
                "\t\t0x08 - ELS logs.\n"
                "\t\t0x10 - fcoe L2 fame related logs.\n"
                "\t\t0xff - LOG all messages.");

static uint bnx2fc_devloss_tmo;
module_param_named(devloss_tmo, bnx2fc_devloss_tmo, uint, S_IRUGO);
MODULE_PARM_DESC(devloss_tmo, " Change devloss_tmo for the remote ports "
        "attached via bnx2fc.");

static uint bnx2fc_max_luns = BNX2FC_MAX_LUN;
module_param_named(max_luns, bnx2fc_max_luns, uint, S_IRUGO);
MODULE_PARM_DESC(max_luns, " Change the default max_lun per SCSI host. Default "
        "0xffff.");

static uint bnx2fc_queue_depth;
module_param_named(queue_depth, bnx2fc_queue_depth, uint, S_IRUGO);
MODULE_PARM_DESC(queue_depth, " Change the default queue depth of SCSI devices "
        "attached via bnx2fc.");

static uint bnx2fc_log_fka;
module_param_named(log_fka, bnx2fc_log_fka, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(log_fka, " Print message to kernel log when fcoe is "
        "initiating a FIP keep alive when debug logging is enabled.");

static inline struct net_device *bnx2fc_netdev(const struct fc_lport *lport)
{
        return ((struct bnx2fc_interface *)
                ((struct fcoe_port *)lport_priv(lport))->priv)->netdev;
}

static void bnx2fc_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
{
        struct fcoe_ctlr_device *ctlr_dev =
                fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
        struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
        struct bnx2fc_interface *fcoe = fcoe_ctlr_priv(ctlr);

        fcf_dev->vlan_id = fcoe->vlan_id;
}

static void bnx2fc_clean_rx_queue(struct fc_lport *lp)
{
        struct fcoe_percpu_s *bg;
        struct fcoe_rcv_info *fr;
        struct sk_buff_head *list;
        struct sk_buff *skb, *next;

        bg = &bnx2fc_global;
        spin_lock_bh(&bg->fcoe_rx_list.lock);
        list = &bg->fcoe_rx_list;
        skb_queue_walk_safe(list, skb, next) {
                fr = fcoe_dev_from_skb(skb);
                if (fr->fr_dev == lp) {
                        __skb_unlink(skb, list);
                        kfree_skb(skb);
                }
        }
        spin_unlock_bh(&bg->fcoe_rx_list.lock);
}

int bnx2fc_get_paged_crc_eof(struct sk_buff *skb, int tlen)
{
        int rc;
        spin_lock(&bnx2fc_global_lock);
        rc = fcoe_get_paged_crc_eof(skb, tlen, &bnx2fc_global);
        spin_unlock(&bnx2fc_global_lock);

        return rc;
}

static void bnx2fc_abort_io(struct fc_lport *lport)
{
        /*
         * This function is no-op for bnx2fc, but we do
         * not want to leave it as NULL either, as libfc
         * can call the default function which is
         * fc_fcp_abort_io.
         */
}

static void bnx2fc_cleanup(struct fc_lport *lport)
{
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;
        struct bnx2fc_hba *hba = interface->hba;
        struct bnx2fc_rport *tgt;
        int i;

        BNX2FC_MISC_DBG("Entered %s\n", __func__);
        mutex_lock(&hba->hba_mutex);
        spin_lock_bh(&hba->hba_lock);
        for (i = 0; i < BNX2FC_NUM_MAX_SESS; i++) {
                tgt = hba->tgt_ofld_list[i];
                if (tgt) {
                        /* Cleanup IOs belonging to requested vport */
                        if (tgt->port == port) {
                                spin_unlock_bh(&hba->hba_lock);
                                BNX2FC_TGT_DBG(tgt, "flush/cleanup\n");
                                bnx2fc_flush_active_ios(tgt);
                                spin_lock_bh(&hba->hba_lock);
                        }
                }
        }
        spin_unlock_bh(&hba->hba_lock);
        mutex_unlock(&hba->hba_mutex);
}

static int bnx2fc_xmit_l2_frame(struct bnx2fc_rport *tgt,
                             struct fc_frame *fp)
{
        struct fc_rport_priv *rdata = tgt->rdata;
        struct fc_frame_header *fh;
        int rc = 0;

        fh = fc_frame_header_get(fp);
        BNX2FC_TGT_DBG(tgt, "Xmit L2 frame rport = 0x%x, oxid = 0x%x, "
                        "r_ctl = 0x%x\n", rdata->ids.port_id,
                        ntohs(fh->fh_ox_id), fh->fh_r_ctl);
        if ((fh->fh_type == FC_TYPE_ELS) &&
            (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {

                switch (fc_frame_payload_op(fp)) {
                case ELS_ADISC:
                        rc = bnx2fc_send_adisc(tgt, fp);
                        break;
                case ELS_LOGO:
                        rc = bnx2fc_send_logo(tgt, fp);
                        break;
                case ELS_RLS:
                        rc = bnx2fc_send_rls(tgt, fp);
                        break;
                default:
                        break;
                }
        } else if ((fh->fh_type ==  FC_TYPE_BLS) &&
            (fh->fh_r_ctl == FC_RCTL_BA_ABTS))
                BNX2FC_TGT_DBG(tgt, "ABTS frame\n");
        else {
                BNX2FC_TGT_DBG(tgt, "Send L2 frame type 0x%x "
                                "rctl 0x%x thru non-offload path\n",
                                fh->fh_type, fh->fh_r_ctl);
                return -ENODEV;
        }
        if (rc)
                return -ENOMEM;
        else
                return 0;
}

/**
 * bnx2fc_xmit - bnx2fc's FCoE frame transmit function
 *
 * @lport:      the associated local port
 * @fp: the fc_frame to be transmitted
 */
static int bnx2fc_xmit(struct fc_lport *lport, struct fc_frame *fp)
{
        struct ethhdr           *eh;
        struct fcoe_crc_eof     *cp;
        struct sk_buff          *skb;
        struct fc_frame_header  *fh;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr        *ctlr;
        struct bnx2fc_hba *hba;
        struct fcoe_port        *port;
        struct fcoe_hdr         *hp;
        struct bnx2fc_rport     *tgt;
        struct fc_stats         *stats;
        u8                      sof, eof;
        u32                     crc;
        unsigned int            hlen, tlen, elen;
        int                     wlen, rc = 0;

        port = (struct fcoe_port *)lport_priv(lport);
        interface = port->priv;
        ctlr = bnx2fc_to_ctlr(interface);
        hba = interface->hba;

        fh = fc_frame_header_get(fp);

        skb = fp_skb(fp);
        if (!lport->link_up) {
                BNX2FC_HBA_DBG(lport, "bnx2fc_xmit link down\n");
                kfree_skb(skb);
                return 0;
        }

        if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
                if (!ctlr->sel_fcf) {
                        BNX2FC_HBA_DBG(lport, "FCF not selected yet!\n");
                        kfree_skb(skb);
                        return -EINVAL;
                }
                if (fcoe_ctlr_els_send(ctlr, lport, skb))
                        return 0;
        }

        sof = fr_sof(fp);
        eof = fr_eof(fp);

        /*
         * Snoop the frame header to check if the frame is for
         * an offloaded session
         */
        /*
         * tgt_ofld_list access is synchronized using
         * both hba mutex and hba lock. Atleast hba mutex or
         * hba lock needs to be held for read access.
         */

        spin_lock_bh(&hba->hba_lock);
        tgt = bnx2fc_tgt_lookup(port, ntoh24(fh->fh_d_id));
        if (tgt && (test_bit(BNX2FC_FLAG_SESSION_READY, &tgt->flags))) {
                /* This frame is for offloaded session */
                BNX2FC_HBA_DBG(lport, "xmit: Frame is for offloaded session "
                                "port_id = 0x%x\n", ntoh24(fh->fh_d_id));
                spin_unlock_bh(&hba->hba_lock);
                rc = bnx2fc_xmit_l2_frame(tgt, fp);
                if (rc != -ENODEV) {
                        kfree_skb(skb);
                        return rc;
                }
        } else {
                spin_unlock_bh(&hba->hba_lock);
        }

        elen = sizeof(struct ethhdr);
        hlen = sizeof(struct fcoe_hdr);
        tlen = sizeof(struct fcoe_crc_eof);
        wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;

        skb->ip_summed = CHECKSUM_NONE;
        crc = fcoe_fc_crc(fp);

        /* copy port crc and eof to the skb buff */
        if (skb_is_nonlinear(skb)) {
                skb_frag_t *frag;
                if (bnx2fc_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(skb_frag_page(frag)) + skb_frag_off(frag);
        } else {
                cp = 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);
                cp = NULL;
        }

        /* adjust skb network/transport offsets to match mac/fcoe/port */
        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 = interface->netdev;

        /* fill up mac and fcoe headers */
        eh = eth_hdr(skb);
        eh->h_proto = htons(ETH_P_FCOE);
        if (ctlr->map_dest)
                fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
        else
                /* insert GW address */
                memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);

        if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
                memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
        else
                memcpy(eh->h_source, port->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;

        /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
        if (lport->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;
        }

        /*update tx stats */
        stats = per_cpu_ptr(lport->stats, get_cpu());
        stats->TxFrames++;
        stats->TxWords += wlen;
        put_cpu();

        /* send down to lld */
        fr_dev(fp) = lport;
        if (port->fcoe_pending_queue.qlen)
                fcoe_check_wait_queue(lport, skb);
        else if (fcoe_start_io(skb))
                fcoe_check_wait_queue(lport, skb);

        return 0;
}

/**
 * bnx2fc_rcv - This is bnx2fc's receive function called by NET_RX_SOFTIRQ
 *
 * @skb:        the receive socket buffer
 * @dev:        associated net device
 * @ptype:      context
 * @olddev:     last device
 *
 * This function receives the packet and builds FC frame and passes it up
 */
static int bnx2fc_rcv(struct sk_buff *skb, struct net_device *dev,
                struct packet_type *ptype, struct net_device *olddev)
{
        struct fc_lport *lport;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        struct fcoe_rcv_info *fr;
        struct fcoe_percpu_s *bg;
        struct sk_buff *tmp_skb;

        interface = container_of(ptype, struct bnx2fc_interface,
                                 fcoe_packet_type);
        ctlr = bnx2fc_to_ctlr(interface);
        lport = ctlr->lp;

        if (unlikely(lport == NULL)) {
                printk(KERN_ERR PFX "bnx2fc_rcv: lport is NULL\n");
                goto err;
        }

        tmp_skb = skb_share_check(skb, GFP_ATOMIC);
        if (!tmp_skb)
                goto err;

        skb = tmp_skb;

        if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
                printk(KERN_ERR PFX "bnx2fc_rcv: Wrong FC type frame\n");
                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));

        fr = fcoe_dev_from_skb(skb);
        fr->fr_dev = lport;

        bg = &bnx2fc_global;
        spin_lock(&bg->fcoe_rx_list.lock);

        __skb_queue_tail(&bg->fcoe_rx_list, skb);
        if (bg->fcoe_rx_list.qlen == 1)
                wake_up_process(bg->kthread);

        spin_unlock(&bg->fcoe_rx_list.lock);

        return 0;
err:
        kfree_skb(skb);
        return -1;
}

static int bnx2fc_l2_rcv_thread(void *arg)
{
        struct fcoe_percpu_s *bg = arg;
        struct sk_buff *skb;

        set_user_nice(current, MIN_NICE);
        set_current_state(TASK_INTERRUPTIBLE);
        while (!kthread_should_stop()) {
                schedule();
                spin_lock_bh(&bg->fcoe_rx_list.lock);
                while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL) {
                        spin_unlock_bh(&bg->fcoe_rx_list.lock);
                        bnx2fc_recv_frame(skb);
                        spin_lock_bh(&bg->fcoe_rx_list.lock);
                }
                __set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_bh(&bg->fcoe_rx_list.lock);
        }
        __set_current_state(TASK_RUNNING);
        return 0;
}


static void bnx2fc_recv_frame(struct sk_buff *skb)
{
        u32 fr_len;
        struct fc_lport *lport;
        struct fcoe_rcv_info *fr;
        struct fc_stats *stats;
        struct fc_frame_header *fh;
        struct fcoe_crc_eof crc_eof;
        struct fc_frame *fp;
        struct fc_lport *vn_port;
        struct fcoe_port *port, *phys_port;
        u8 *mac = NULL;
        u8 *dest_mac = NULL;
        struct fcoe_hdr *hp;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;

        fr = fcoe_dev_from_skb(skb);
        lport = fr->fr_dev;
        if (unlikely(lport == NULL)) {
                printk(KERN_ERR PFX "Invalid lport struct\n");
                kfree_skb(skb);
                return;
        }

        if (skb_is_nonlinear(skb))
                skb_linearize(skb);
        mac = eth_hdr(skb)->h_source;
        dest_mac = eth_hdr(skb)->h_dest;

        /* Pull the header */
        hp = (struct fcoe_hdr *) skb_network_header(skb);
        fh = (struct fc_frame_header *) skb_transport_header(skb);
        skb_pull(skb, sizeof(struct fcoe_hdr));
        fr_len = skb->len - sizeof(struct fcoe_crc_eof);

        fp = (struct fc_frame *)skb;
        fc_frame_init(fp);
        fr_dev(fp) = lport;
        fr_sof(fp) = hp->fcoe_sof;
        if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
                kfree_skb(skb);
                return;
        }
        fr_eof(fp) = crc_eof.fcoe_eof;
        fr_crc(fp) = crc_eof.fcoe_crc32;
        if (pskb_trim(skb, fr_len)) {
                kfree_skb(skb);
                return;
        }

        phys_port = lport_priv(lport);
        interface = phys_port->priv;
        ctlr = bnx2fc_to_ctlr(interface);

        fh = fc_frame_header_get(fp);

        if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
                BNX2FC_HBA_DBG(lport, "FC frame d_id mismatch with MAC %pM.\n",
                    dest_mac);
                kfree_skb(skb);
                return;
        }

        vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
        if (vn_port) {
                port = lport_priv(vn_port);
                if (!ether_addr_equal(port->data_src_addr, dest_mac)) {
                        BNX2FC_HBA_DBG(lport, "fpma mismatch\n");
                        kfree_skb(skb);
                        return;
                }
        }
        if (ctlr->state) {
                if (!ether_addr_equal(mac, ctlr->dest_addr)) {
                        BNX2FC_HBA_DBG(lport, "Wrong source address: mac:%pM dest_addr:%pM.\n",
                            mac, ctlr->dest_addr);
                        kfree_skb(skb);
                        return;
                }
        }
        if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
            fh->fh_type == FC_TYPE_FCP) {
                /* Drop FCP data. We dont this in L2 path */
                kfree_skb(skb);
                return;
        }
        if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
            fh->fh_type == FC_TYPE_ELS) {
                switch (fc_frame_payload_op(fp)) {
                case ELS_LOGO:
                        if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
                                /* drop non-FIP LOGO */
                                kfree_skb(skb);
                                return;
                        }
                        break;
                }
        }

        if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
                /* Drop incoming ABTS */
                kfree_skb(skb);
                return;
        }

        /*
         * If the destination ID from the frame header does not match what we
         * have on record for lport and the search for a NPIV port came up
         * empty then this is not addressed to our port so simply drop it.
         */
        if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
                BNX2FC_HBA_DBG(lport, "Dropping frame due to destination mismatch: lport->port_id=%x fh->d_id=%x.\n",
                    lport->port_id, ntoh24(fh->fh_d_id));
                kfree_skb(skb);
                return;
        }

        stats = per_cpu_ptr(lport->stats, smp_processor_id());
        stats->RxFrames++;
        stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;

        if (le32_to_cpu(fr_crc(fp)) !=
                        ~crc32(~0, skb->data, fr_len)) {
                if (stats->InvalidCRCCount < 5)
                        printk(KERN_WARNING PFX "dropping frame with "
                               "CRC error\n");
                stats->InvalidCRCCount++;
                kfree_skb(skb);
                return;
        }
        fc_exch_recv(lport, fp);
}

/**
 * bnx2fc_percpu_io_thread - thread per cpu for ios
 *
 * @arg:        ptr to bnx2fc_percpu_info structure
 */
static int bnx2fc_percpu_io_thread(void *arg)
{
        struct bnx2fc_percpu_s *p = arg;
        struct bnx2fc_work *work, *tmp;
        LIST_HEAD(work_list);

        set_user_nice(current, MIN_NICE);
        set_current_state(TASK_INTERRUPTIBLE);
        while (!kthread_should_stop()) {
                schedule();
                spin_lock_bh(&p->fp_work_lock);
                while (!list_empty(&p->work_list)) {
                        list_splice_init(&p->work_list, &work_list);
                        spin_unlock_bh(&p->fp_work_lock);

                        list_for_each_entry_safe(work, tmp, &work_list, list) {
                                list_del_init(&work->list);
                                bnx2fc_process_cq_compl(work->tgt, work->wqe,
                                                        work->rq_data,
                                                        work->num_rq,
                                                        work->task);
                                kfree(work);
                        }

                        spin_lock_bh(&p->fp_work_lock);
                }
                __set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_bh(&p->fp_work_lock);
        }
        __set_current_state(TASK_RUNNING);

        return 0;
}

static struct fc_host_statistics *bnx2fc_get_host_stats(struct Scsi_Host *shost)
{
        struct fc_host_statistics *bnx2fc_stats;
        struct fc_lport *lport = shost_priv(shost);
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;
        struct bnx2fc_hba *hba = interface->hba;
        struct fcoe_statistics_params *fw_stats;
        int rc = 0;

        fw_stats = (struct fcoe_statistics_params *)hba->stats_buffer;
        if (!fw_stats)
                return NULL;

        mutex_lock(&hba->hba_stats_mutex);

        bnx2fc_stats = fc_get_host_stats(shost);

        init_completion(&hba->stat_req_done);
        if (bnx2fc_send_stat_req(hba))
                goto unlock_stats_mutex;
        rc = wait_for_completion_timeout(&hba->stat_req_done, (2 * HZ));
        if (!rc) {
                BNX2FC_HBA_DBG(lport, "FW stat req timed out\n");
                goto unlock_stats_mutex;
        }
        BNX2FC_STATS(hba, rx_stat2, fc_crc_cnt);
        bnx2fc_stats->invalid_crc_count += hba->bfw_stats.fc_crc_cnt;
        BNX2FC_STATS(hba, tx_stat, fcoe_tx_pkt_cnt);
        bnx2fc_stats->tx_frames += hba->bfw_stats.fcoe_tx_pkt_cnt;
        BNX2FC_STATS(hba, tx_stat, fcoe_tx_byte_cnt);
        bnx2fc_stats->tx_words += ((hba->bfw_stats.fcoe_tx_byte_cnt) / 4);
        BNX2FC_STATS(hba, rx_stat0, fcoe_rx_pkt_cnt);
        bnx2fc_stats->rx_frames += hba->bfw_stats.fcoe_rx_pkt_cnt;
        BNX2FC_STATS(hba, rx_stat0, fcoe_rx_byte_cnt);
        bnx2fc_stats->rx_words += ((hba->bfw_stats.fcoe_rx_byte_cnt) / 4);

        bnx2fc_stats->dumped_frames = 0;
        bnx2fc_stats->lip_count = 0;
        bnx2fc_stats->nos_count = 0;
        bnx2fc_stats->loss_of_sync_count = 0;
        bnx2fc_stats->loss_of_signal_count = 0;
        bnx2fc_stats->prim_seq_protocol_err_count = 0;

        memcpy(&hba->prev_stats, hba->stats_buffer,
               sizeof(struct fcoe_statistics_params));

unlock_stats_mutex:
        mutex_unlock(&hba->hba_stats_mutex);
        return bnx2fc_stats;
}

static int bnx2fc_shost_config(struct fc_lport *lport, struct device *dev)
{
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;
        struct bnx2fc_hba *hba = interface->hba;
        struct Scsi_Host *shost = lport->host;
        int rc = 0;

        shost->max_cmd_len = BNX2FC_MAX_CMD_LEN;
        shost->max_lun = bnx2fc_max_luns;
        shost->max_id = BNX2FC_MAX_FCP_TGT;
        shost->max_channel = 0;
        if (lport->vport)
                shost->transportt = bnx2fc_vport_xport_template;
        else
                shost->transportt = bnx2fc_transport_template;

        /* Add the new host to SCSI-ml */
        rc = scsi_add_host(lport->host, dev);
        if (rc) {
                printk(KERN_ERR PFX "Error on scsi_add_host\n");
                return rc;
        }
        if (!lport->vport)
                fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
        snprintf(fc_host_symbolic_name(lport->host), 256,
                 "%s (QLogic %s) v%s over %s",
                BNX2FC_NAME, hba->chip_num, BNX2FC_VERSION,
                interface->netdev->name);

        return 0;
}

static int bnx2fc_link_ok(struct fc_lport *lport)
{
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;
        struct bnx2fc_hba *hba = interface->hba;
        struct net_device *dev = hba->phys_dev;
        int rc = 0;

        if ((dev->flags & IFF_UP) && netif_carrier_ok(dev))
                clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
        else {
                set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
                rc = -1;
        }
        return rc;
}

/**
 * bnx2fc_get_link_state - get network link state
 *
 * @hba:        adapter instance pointer
 *
 * updates adapter structure flag based on netdev state
 */
void bnx2fc_get_link_state(struct bnx2fc_hba *hba)
{
        if (test_bit(__LINK_STATE_NOCARRIER, &hba->phys_dev->state))
                set_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
        else
                clear_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state);
}

static int bnx2fc_net_config(struct fc_lport *lport, struct net_device *netdev)
{
        struct bnx2fc_hba *hba;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        struct fcoe_port *port;
        u64 wwnn, wwpn;

        port = lport_priv(lport);
        interface = port->priv;
        ctlr = bnx2fc_to_ctlr(interface);
        hba = interface->hba;

        /* require support for get_pauseparam ethtool op. */
        if (!hba->phys_dev->ethtool_ops ||
            !hba->phys_dev->ethtool_ops->get_pauseparam)
                return -EOPNOTSUPP;

        if (fc_set_mfs(lport, BNX2FC_MFS))
                return -EINVAL;

        skb_queue_head_init(&port->fcoe_pending_queue);
        port->fcoe_pending_queue_active = 0;
        timer_setup(&port->timer, fcoe_queue_timer, 0);

        fcoe_link_speed_update(lport);

        if (!lport->vport) {
                if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
                        wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
                                                 1, 0);
                BNX2FC_HBA_DBG(lport, "WWNN = 0x%llx\n", wwnn);
                fc_set_wwnn(lport, wwnn);

                if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
                        wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
                                                 2, 0);

                BNX2FC_HBA_DBG(lport, "WWPN = 0x%llx\n", wwpn);
                fc_set_wwpn(lport, wwpn);
        }

        return 0;
}

static void bnx2fc_destroy_timer(struct timer_list *t)
{
        struct bnx2fc_hba *hba = from_timer(hba, t, destroy_timer);

        printk(KERN_ERR PFX "ERROR:bnx2fc_destroy_timer - "
               "Destroy compl not received!!\n");
        set_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
        wake_up_interruptible(&hba->destroy_wait);
}

/**
 * bnx2fc_indicate_netevent - Generic netdev event handler
 *
 * @context:    adapter structure pointer
 * @event:      event type
 * @vlan_id:    vlan id - associated vlan id with this event
 *
 * Handles NETDEV_UP, NETDEV_DOWN, NETDEV_GOING_DOWN,NETDEV_CHANGE and
 * NETDEV_CHANGE_MTU events. Handle NETDEV_UNREGISTER only for vlans.
 */
static void bnx2fc_indicate_netevent(void *context, unsigned long event,
                                     u16 vlan_id)
{
        struct bnx2fc_hba *hba = (struct bnx2fc_hba *)context;
        struct fcoe_ctlr_device *cdev;
        struct fc_lport *lport;
        struct fc_lport *vport;
        struct bnx2fc_interface *interface, *tmp;
        struct fcoe_ctlr *ctlr;
        int wait_for_upload = 0;
        u32 link_possible = 1;

        if (vlan_id != 0 && event != NETDEV_UNREGISTER)
                return;

        switch (event) {
        case NETDEV_UP:
                if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
                        printk(KERN_ERR "indicate_netevent: "\
                                        "hba is not UP!!\n");
                break;

        case NETDEV_DOWN:
                clear_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
                clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
                link_possible = 0;
                break;

        case NETDEV_GOING_DOWN:
                set_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state);
                link_possible = 0;
                break;

        case NETDEV_CHANGE:
                break;

        case NETDEV_UNREGISTER:
                if (!vlan_id)
                        return;
                mutex_lock(&bnx2fc_dev_lock);
                list_for_each_entry_safe(interface, tmp, &if_list, list) {
                        if (interface->hba == hba &&
                            interface->vlan_id == (vlan_id & VLAN_VID_MASK))
                                __bnx2fc_destroy(interface);
                }
                mutex_unlock(&bnx2fc_dev_lock);

                /* Ensure ALL destroy work has been completed before return */
                flush_workqueue(bnx2fc_wq);
                return;

        default:
                return;
        }

        mutex_lock(&bnx2fc_dev_lock);
        list_for_each_entry(interface, &if_list, list) {

                if (interface->hba != hba)
                        continue;

                ctlr = bnx2fc_to_ctlr(interface);
                lport = ctlr->lp;
                BNX2FC_HBA_DBG(lport, "netevent handler - event=%s %ld\n",
                                interface->netdev->name, event);

                fcoe_link_speed_update(lport);

                cdev = fcoe_ctlr_to_ctlr_dev(ctlr);

                if (link_possible && !bnx2fc_link_ok(lport)) {
                        switch (cdev->enabled) {
                        case FCOE_CTLR_DISABLED:
                                pr_info("Link up while interface is disabled.\n");
                                break;
                        case FCOE_CTLR_ENABLED:
                        case FCOE_CTLR_UNUSED:
                                /* Reset max recv frame size to default */
                                fc_set_mfs(lport, BNX2FC_MFS);
                                /*
                                 * ctlr link up will only be handled during
                                 * enable to avoid sending discovery
                                 * solicitation on a stale vlan
                                 */
                                if (interface->enabled)
                                        fcoe_ctlr_link_up(ctlr);
                        }
                } else if (fcoe_ctlr_link_down(ctlr)) {
                        switch (cdev->enabled) {
                        case FCOE_CTLR_DISABLED:
                                pr_info("Link down while interface is disabled.\n");
                                break;
                        case FCOE_CTLR_ENABLED:
                        case FCOE_CTLR_UNUSED:
                                mutex_lock(&lport->lp_mutex);
                                list_for_each_entry(vport, &lport->vports, list)
                                        fc_host_port_type(vport->host) =
                                        FC_PORTTYPE_UNKNOWN;
                                mutex_unlock(&lport->lp_mutex);
                                fc_host_port_type(lport->host) =
                                        FC_PORTTYPE_UNKNOWN;
                                per_cpu_ptr(lport->stats,
                                            get_cpu())->LinkFailureCount++;
                                put_cpu();
                                fcoe_clean_pending_queue(lport);
                                wait_for_upload = 1;
                        }
                }
        }
        mutex_unlock(&bnx2fc_dev_lock);

        if (wait_for_upload) {
                clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
                init_waitqueue_head(&hba->shutdown_wait);
                BNX2FC_MISC_DBG("indicate_netevent "
                                "num_ofld_sess = %d\n",
                                hba->num_ofld_sess);
                hba->wait_for_link_down = 1;
                wait_event_interruptible(hba->shutdown_wait,
                                         (hba->num_ofld_sess == 0));
                BNX2FC_MISC_DBG("wakeup - num_ofld_sess = %d\n",
                                hba->num_ofld_sess);
                hba->wait_for_link_down = 0;

                if (signal_pending(current))
                        flush_signals(current);
        }
}

static int bnx2fc_libfc_config(struct fc_lport *lport)
{

        /* Set the function pointers set by bnx2fc driver */
        memcpy(&lport->tt, &bnx2fc_libfc_fcn_templ,
                sizeof(struct libfc_function_template));
        fc_elsct_init(lport);
        fc_exch_init(lport);

        fc_disc_init(lport);
        fc_disc_config(lport, lport);
        return 0;
}

static int bnx2fc_em_config(struct fc_lport *lport, struct bnx2fc_hba *hba)
{
        int fcoe_min_xid, fcoe_max_xid;

        fcoe_min_xid = hba->max_xid + 1;
        if (nr_cpu_ids <= 2)
                fcoe_max_xid = hba->max_xid + FCOE_XIDS_PER_CPU_OFFSET;
        else
                fcoe_max_xid = hba->max_xid + FCOE_MAX_XID_OFFSET;
        if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, fcoe_min_xid,
                               fcoe_max_xid, NULL)) {
                printk(KERN_ERR PFX "em_config:fc_exch_mgr_alloc failed\n");
                return -ENOMEM;
        }

        return 0;
}

static int bnx2fc_lport_config(struct fc_lport *lport)
{
        lport->link_up = 0;
        lport->qfull = 0;
        lport->max_retry_count = BNX2FC_MAX_RETRY_CNT;
        lport->max_rport_retry_count = BNX2FC_MAX_RPORT_RETRY_CNT;
        lport->e_d_tov = 2 * 1000;
        lport->r_a_tov = 10 * 1000;

        lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
                                FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
        lport->does_npiv = 1;

        memset(&lport->rnid_gen, 0, sizeof(struct fc_els_rnid_gen));
        lport->rnid_gen.rnid_atype = BNX2FC_RNID_HBA;

        /* alloc stats structure */
        if (fc_lport_init_stats(lport))
                return -ENOMEM;

        /* Finish fc_lport configuration */
        fc_lport_config(lport);

        return 0;
}

/**
 * bnx2fc_fip_recv - handle a received FIP frame.
 *
 * @skb: the received skb
 * @dev: associated &net_device
 * @ptype: the &packet_type structure which was used to register this handler.
 * @orig_dev: original receive &net_device, in case @ dev is a bond.
 *
 * Returns: 0 for success
 */
static int bnx2fc_fip_recv(struct sk_buff *skb, struct net_device *dev,
                           struct packet_type *ptype,
                           struct net_device *orig_dev)
{
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        interface = container_of(ptype, struct bnx2fc_interface,
                                 fip_packet_type);
        ctlr = bnx2fc_to_ctlr(interface);
        fcoe_ctlr_recv(ctlr, skb);
        return 0;
}

/**
 * bnx2fc_update_src_mac - Update Ethernet MAC filters.
 *
 * @lport: The local port
 * @addr: Location of data to copy
 *
 * Remove any previously-set unicast MAC filter.
 * Add secondary FCoE MAC address filter for our OUI.
 */
static void bnx2fc_update_src_mac(struct fc_lport *lport, u8 *addr)
{
        struct fcoe_port *port = lport_priv(lport);

        memcpy(port->data_src_addr, addr, ETH_ALEN);
}

/**
 * bnx2fc_get_src_mac - return the ethernet source address for an lport
 *
 * @lport: libfc port
 */
static u8 *bnx2fc_get_src_mac(struct fc_lport *lport)
{
        struct fcoe_port *port;

        port = (struct fcoe_port *)lport_priv(lport);
        return port->data_src_addr;
}

/**
 * bnx2fc_fip_send - send an Ethernet-encapsulated FIP frame.
 *
 * @fip: FCoE controller.
 * @skb: FIP Packet.
 */
static void bnx2fc_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
        struct fip_header *fiph;
        struct ethhdr *eth_hdr;
        u16 op;
        u8 sub;

        fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
        eth_hdr = (struct ethhdr *)skb_mac_header(skb);
        op = ntohs(fiph->fip_op);
        sub = fiph->fip_subcode;

        if (op == FIP_OP_CTRL && sub == FIP_SC_SOL && bnx2fc_log_fka)
                BNX2FC_MISC_DBG("Sending FKA from %pM to %pM.\n",
                    eth_hdr->h_source, eth_hdr->h_dest);

        skb->dev = bnx2fc_from_ctlr(fip)->netdev;
        dev_queue_xmit(skb);
}

static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
{
        struct Scsi_Host *shost = vport_to_shost(vport);
        struct fc_lport *n_port = shost_priv(shost);
        struct fcoe_port *port = lport_priv(n_port);
        struct bnx2fc_interface *interface = port->priv;
        struct net_device *netdev = interface->netdev;
        struct fc_lport *vn_port;
        int rc;
        char buf[32];

        rc = fcoe_validate_vport_create(vport);
        if (rc) {
                fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
                printk(KERN_ERR PFX "Failed to create vport, "
                       "WWPN (0x%s) already exists\n",
                       buf);
                return rc;
        }

        if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
                printk(KERN_ERR PFX "vn ports cannot be created on"
                        "this interface\n");
                return -EIO;
        }
        rtnl_lock();
        mutex_lock(&bnx2fc_dev_lock);
        vn_port = bnx2fc_if_create(interface, &vport->dev, 1);
        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();

        if (!vn_port) {
                printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
                        netdev->name);
                return -EIO;
        }

        if (bnx2fc_devloss_tmo)
                fc_host_dev_loss_tmo(vn_port->host) = bnx2fc_devloss_tmo;

        if (disabled) {
                fc_vport_set_state(vport, FC_VPORT_DISABLED);
        } else {
                vn_port->boot_time = jiffies;
                fc_lport_init(vn_port);
                fc_fabric_login(vn_port);
                fc_vport_setlink(vn_port);
        }
        return 0;
}

static void bnx2fc_free_vport(struct bnx2fc_hba *hba, struct fc_lport *lport)
{
        struct bnx2fc_lport *blport, *tmp;

        spin_lock_bh(&hba->hba_lock);
        list_for_each_entry_safe(blport, tmp, &hba->vports, list) {
                if (blport->lport == lport) {
                        list_del(&blport->list);
                        kfree(blport);
                }
        }
        spin_unlock_bh(&hba->hba_lock);
}

static int bnx2fc_vport_destroy(struct fc_vport *vport)
{
        struct Scsi_Host *shost = vport_to_shost(vport);
        struct fc_lport *n_port = shost_priv(shost);
        struct fc_lport *vn_port = vport->dd_data;
        struct fcoe_port *port = lport_priv(vn_port);
        struct bnx2fc_interface *interface = port->priv;
        struct fc_lport *v_port;
        bool found = false;

        mutex_lock(&n_port->lp_mutex);
        list_for_each_entry(v_port, &n_port->vports, list)
                if (v_port->vport == vport) {
                        found = true;
                        break;
                }

        if (!found) {
                mutex_unlock(&n_port->lp_mutex);
                return -ENOENT;
        }
        list_del(&vn_port->list);
        mutex_unlock(&n_port->lp_mutex);
        bnx2fc_free_vport(interface->hba, port->lport);
        bnx2fc_port_shutdown(port->lport);
        bnx2fc_interface_put(interface);
        queue_work(bnx2fc_wq, &port->destroy_work);
        return 0;
}

static int bnx2fc_vport_disable(struct fc_vport *vport, bool disable)
{
        struct fc_lport *lport = vport->dd_data;

        if (disable) {
                fc_vport_set_state(vport, FC_VPORT_DISABLED);
                fc_fabric_logoff(lport);
        } else {
                lport->boot_time = jiffies;
                fc_fabric_login(lport);
                fc_vport_setlink(lport);
        }
        return 0;
}


static int bnx2fc_interface_setup(struct bnx2fc_interface *interface)
{
        struct net_device *netdev = interface->netdev;
        struct net_device *physdev = interface->hba->phys_dev;
        struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
        struct netdev_hw_addr *ha;
        int sel_san_mac = 0;

        /* setup Source MAC Address */
        rcu_read_lock();
        for_each_dev_addr(physdev, ha) {
                BNX2FC_MISC_DBG("net_config: ha->type = %d, fip_mac = ",
                                ha->type);
                printk(KERN_INFO "%2x:%2x:%2x:%2x:%2x:%2x\n", ha->addr[0],
                                ha->addr[1], ha->addr[2], ha->addr[3],
                                ha->addr[4], ha->addr[5]);

                if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
                    (is_valid_ether_addr(ha->addr))) {
                        memcpy(ctlr->ctl_src_addr, ha->addr,
                               ETH_ALEN);
                        sel_san_mac = 1;
                        BNX2FC_MISC_DBG("Found SAN MAC\n");
                }
        }
        rcu_read_unlock();

        if (!sel_san_mac)
                return -ENODEV;

        interface->fip_packet_type.func = bnx2fc_fip_recv;
        interface->fip_packet_type.type = htons(ETH_P_FIP);
        interface->fip_packet_type.dev = netdev;
        dev_add_pack(&interface->fip_packet_type);

        interface->fcoe_packet_type.func = bnx2fc_rcv;
        interface->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
        interface->fcoe_packet_type.dev = netdev;
        dev_add_pack(&interface->fcoe_packet_type);

        return 0;
}

static int bnx2fc_attach_transport(void)
{
        bnx2fc_transport_template =
                fc_attach_transport(&bnx2fc_transport_function);

        if (bnx2fc_transport_template == NULL) {
                printk(KERN_ERR PFX "Failed to attach FC transport\n");
                return -ENODEV;
        }

        bnx2fc_vport_xport_template =
                fc_attach_transport(&bnx2fc_vport_xport_function);
        if (bnx2fc_vport_xport_template == NULL) {
                printk(KERN_ERR PFX
                       "Failed to attach FC transport for vport\n");
                fc_release_transport(bnx2fc_transport_template);
                bnx2fc_transport_template = NULL;
                return -ENODEV;
        }
        return 0;
}
static void bnx2fc_release_transport(void)
{
        fc_release_transport(bnx2fc_transport_template);
        fc_release_transport(bnx2fc_vport_xport_template);
        bnx2fc_transport_template = NULL;
        bnx2fc_vport_xport_template = NULL;
}

static void bnx2fc_interface_release(struct kref *kref)
{
        struct fcoe_ctlr_device *ctlr_dev;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        struct net_device *netdev;

        interface = container_of(kref, struct bnx2fc_interface, kref);
        BNX2FC_MISC_DBG("Interface is being released\n");

        ctlr = bnx2fc_to_ctlr(interface);
        ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
        netdev = interface->netdev;

        /* tear-down FIP controller */
        if (test_and_clear_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags))
                fcoe_ctlr_destroy(ctlr);

        fcoe_ctlr_device_delete(ctlr_dev);

        dev_put(netdev);
        module_put(THIS_MODULE);
}

static inline void bnx2fc_interface_get(struct bnx2fc_interface *interface)
{
        kref_get(&interface->kref);
}

static inline void bnx2fc_interface_put(struct bnx2fc_interface *interface)
{
        kref_put(&interface->kref, bnx2fc_interface_release);
}
static void bnx2fc_hba_destroy(struct bnx2fc_hba *hba)
{
        /* Free the command manager */
        if (hba->cmd_mgr) {
                bnx2fc_cmd_mgr_free(hba->cmd_mgr);
                hba->cmd_mgr = NULL;
        }
        kfree(hba->tgt_ofld_list);
        bnx2fc_unbind_pcidev(hba);
        kfree(hba);
}

/**
 * bnx2fc_hba_create - create a new bnx2fc hba
 *
 * @cnic:       pointer to cnic device
 *
 * Creates a new FCoE hba on the given device.
 *
 */
static struct bnx2fc_hba *bnx2fc_hba_create(struct cnic_dev *cnic)
{
        struct bnx2fc_hba *hba;
        struct fcoe_capabilities *fcoe_cap;
        int rc;

        hba = kzalloc(sizeof(*hba), GFP_KERNEL);
        if (!hba) {
                printk(KERN_ERR PFX "Unable to allocate hba structure\n");
                return NULL;
        }
        spin_lock_init(&hba->hba_lock);
        mutex_init(&hba->hba_mutex);
        mutex_init(&hba->hba_stats_mutex);

        hba->cnic = cnic;

        hba->max_tasks = cnic->max_fcoe_exchanges;
        hba->elstm_xids = (hba->max_tasks / 2);
        hba->max_outstanding_cmds = hba->elstm_xids;
        hba->max_xid = (hba->max_tasks - 1);

        rc = bnx2fc_bind_pcidev(hba);
        if (rc) {
                printk(KERN_ERR PFX "create_adapter:  bind error\n");
                goto bind_err;
        }
        hba->phys_dev = cnic->netdev;
        hba->next_conn_id = 0;

        hba->tgt_ofld_list =
                kcalloc(BNX2FC_NUM_MAX_SESS, sizeof(struct bnx2fc_rport *),
                        GFP_KERNEL);
        if (!hba->tgt_ofld_list) {
                printk(KERN_ERR PFX "Unable to allocate tgt offload list\n");
                goto tgtofld_err;
        }

        hba->num_ofld_sess = 0;

        hba->cmd_mgr = bnx2fc_cmd_mgr_alloc(hba);
        if (!hba->cmd_mgr) {
                printk(KERN_ERR PFX "em_config:bnx2fc_cmd_mgr_alloc failed\n");
                goto cmgr_err;
        }
        fcoe_cap = &hba->fcoe_cap;

        fcoe_cap->capability1 = BNX2FC_TM_MAX_SQES <<
                                        FCOE_IOS_PER_CONNECTION_SHIFT;
        fcoe_cap->capability1 |= BNX2FC_NUM_MAX_SESS <<
                                        FCOE_LOGINS_PER_PORT_SHIFT;
        fcoe_cap->capability2 = hba->max_outstanding_cmds <<
                                        FCOE_NUMBER_OF_EXCHANGES_SHIFT;
        fcoe_cap->capability2 |= BNX2FC_MAX_NPIV <<
                                        FCOE_NPIV_WWN_PER_PORT_SHIFT;
        fcoe_cap->capability3 = BNX2FC_NUM_MAX_SESS <<
                                        FCOE_TARGETS_SUPPORTED_SHIFT;
        fcoe_cap->capability3 |= hba->max_outstanding_cmds <<
                                        FCOE_OUTSTANDING_COMMANDS_SHIFT;
        fcoe_cap->capability4 = FCOE_CAPABILITY4_STATEFUL;

        init_waitqueue_head(&hba->shutdown_wait);
        init_waitqueue_head(&hba->destroy_wait);
        INIT_LIST_HEAD(&hba->vports);

        return hba;

cmgr_err:
        kfree(hba->tgt_ofld_list);
tgtofld_err:
        bnx2fc_unbind_pcidev(hba);
bind_err:
        kfree(hba);
        return NULL;
}

static struct bnx2fc_interface *
bnx2fc_interface_create(struct bnx2fc_hba *hba,
                        struct net_device *netdev,
                        enum fip_mode fip_mode)
{
        struct fcoe_ctlr_device *ctlr_dev;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        int size;
        int rc = 0;

        size = (sizeof(*interface) + sizeof(struct fcoe_ctlr));
        ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &bnx2fc_fcoe_sysfs_templ,
                                         size);
        if (!ctlr_dev) {
                printk(KERN_ERR PFX "Unable to allocate interface structure\n");
                return NULL;
        }
        ctlr = fcoe_ctlr_device_priv(ctlr_dev);
        ctlr->cdev = ctlr_dev;
        interface = fcoe_ctlr_priv(ctlr);
        dev_hold(netdev);
        kref_init(&interface->kref);
        interface->hba = hba;
        interface->netdev = netdev;

        /* Initialize FIP */
        fcoe_ctlr_init(ctlr, fip_mode);
        ctlr->send = bnx2fc_fip_send;
        ctlr->update_mac = bnx2fc_update_src_mac;
        ctlr->get_src_addr = bnx2fc_get_src_mac;
        set_bit(BNX2FC_CTLR_INIT_DONE, &interface->if_flags);

        rc = bnx2fc_interface_setup(interface);
        if (!rc)
                return interface;

        fcoe_ctlr_destroy(ctlr);
        dev_put(netdev);
        fcoe_ctlr_device_delete(ctlr_dev);
        return NULL;
}

/**
 * bnx2fc_if_create - Create FCoE instance on a given interface
 *
 * @interface:  FCoE interface to create a local port on
 * @parent:     Device pointer to be the parent in sysfs for the SCSI host
 * @npiv:       Indicates if the port is vport or not
 *
 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
 *
 * Returns:     Allocated fc_lport or an error pointer
 */
static struct fc_lport *bnx2fc_if_create(struct bnx2fc_interface *interface,
                                  struct device *parent, int npiv)
{
        struct fcoe_ctlr        *ctlr = bnx2fc_to_ctlr(interface);
        struct fc_lport         *lport, *n_port;
        struct fcoe_port        *port;
        struct Scsi_Host        *shost;
        struct fc_vport         *vport = dev_to_vport(parent);
        struct bnx2fc_lport     *blport;
        struct bnx2fc_hba       *hba = interface->hba;
        int                     rc = 0;

        blport = kzalloc(sizeof(struct bnx2fc_lport), GFP_KERNEL);
        if (!blport) {
                BNX2FC_HBA_DBG(ctlr->lp, "Unable to alloc blport\n");
                return NULL;
        }

        /* Allocate Scsi_Host structure */
        bnx2fc_shost_template.can_queue = hba->max_outstanding_cmds;
        if (!npiv)
                lport = libfc_host_alloc(&bnx2fc_shost_template, sizeof(*port));
        else
                lport = libfc_vport_create(vport, sizeof(*port));

        if (!lport) {
                printk(KERN_ERR PFX "could not allocate scsi host structure\n");
                goto free_blport;
        }
        shost = lport->host;
        port = lport_priv(lport);
        port->lport = lport;
        port->priv = interface;
        port->get_netdev = bnx2fc_netdev;
        INIT_WORK(&port->destroy_work, bnx2fc_destroy_work);

        /* Configure fcoe_port */
        rc = bnx2fc_lport_config(lport);
        if (rc)
                goto lp_config_err;

        if (npiv) {
                printk(KERN_ERR PFX "Setting vport names, 0x%llX 0x%llX\n",
                        vport->node_name, vport->port_name);
                fc_set_wwnn(lport, vport->node_name);
                fc_set_wwpn(lport, vport->port_name);
        }
        /* Configure netdev and networking properties of the lport */
        rc = bnx2fc_net_config(lport, interface->netdev);
        if (rc) {
                printk(KERN_ERR PFX "Error on bnx2fc_net_config\n");
                goto lp_config_err;
        }

        rc = bnx2fc_shost_config(lport, parent);
        if (rc) {
                printk(KERN_ERR PFX "Couldn't configure shost for %s\n",
                        interface->netdev->name);
                goto lp_config_err;
        }

        /* Initialize the libfc library */
        rc = bnx2fc_libfc_config(lport);
        if (rc) {
                printk(KERN_ERR PFX "Couldn't configure libfc\n");
                goto shost_err;
        }
        fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;

        if (bnx2fc_devloss_tmo)
                fc_host_dev_loss_tmo(shost) = bnx2fc_devloss_tmo;

        /* Allocate exchange manager */
        if (!npiv)
                rc = bnx2fc_em_config(lport, hba);
        else {
                shost = vport_to_shost(vport);
                n_port = shost_priv(shost);
                rc = fc_exch_mgr_list_clone(n_port, lport);
        }

        if (rc) {
                printk(KERN_ERR PFX "Error on bnx2fc_em_config\n");
                goto shost_err;
        }

        bnx2fc_interface_get(interface);

        spin_lock_bh(&hba->hba_lock);
        blport->lport = lport;
        list_add_tail(&blport->list, &hba->vports);
        spin_unlock_bh(&hba->hba_lock);

        return lport;

shost_err:
        scsi_remove_host(shost);
lp_config_err:
        scsi_host_put(lport->host);
free_blport:
        kfree(blport);
        return NULL;
}

static void bnx2fc_net_cleanup(struct bnx2fc_interface *interface)
{
        /* Dont listen for Ethernet packets anymore */
        __dev_remove_pack(&interface->fcoe_packet_type);
        __dev_remove_pack(&interface->fip_packet_type);
        synchronize_net();
}

static void bnx2fc_interface_cleanup(struct bnx2fc_interface *interface)
{
        struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
        struct fc_lport *lport = ctlr->lp;
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_hba *hba = interface->hba;

        /* Stop the transmit retry timer */
        del_timer_sync(&port->timer);

        /* Free existing transmit skbs */
        fcoe_clean_pending_queue(lport);

        bnx2fc_net_cleanup(interface);

        bnx2fc_free_vport(hba, lport);
}

static void bnx2fc_if_destroy(struct fc_lport *lport)
{

        /* Free queued packets for the receive thread */
        bnx2fc_clean_rx_queue(lport);

        /* Detach from scsi-ml */
        fc_remove_host(lport->host);
        scsi_remove_host(lport->host);

        /*
         * Note that only the physical lport will have the exchange manager.
         * for vports, this function is NOP
         */
        fc_exch_mgr_free(lport);

        /* Free memory used by statistical counters */
        fc_lport_free_stats(lport);

        /* Release Scsi_Host */
        scsi_host_put(lport->host);
}

static void __bnx2fc_destroy(struct bnx2fc_interface *interface)
{
        struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
        struct fc_lport *lport = ctlr->lp;
        struct fcoe_port *port = lport_priv(lport);

        bnx2fc_interface_cleanup(interface);
        bnx2fc_stop(interface);
        list_del(&interface->list);
        bnx2fc_interface_put(interface);
        queue_work(bnx2fc_wq, &port->destroy_work);
}

/**
 * bnx2fc_destroy - Destroy a bnx2fc FCoE interface
 *
 * @netdev: The net device that the FCoE interface is on
 *
 * Called from sysfs.
 *
 * Returns: 0 for success
 */
static int bnx2fc_destroy(struct net_device *netdev)
{
        struct bnx2fc_interface *interface = NULL;
        struct workqueue_struct *timer_work_queue;
        struct fcoe_ctlr *ctlr;
        int rc = 0;

        rtnl_lock();
        mutex_lock(&bnx2fc_dev_lock);

        interface = bnx2fc_interface_lookup(netdev);
        ctlr = bnx2fc_to_ctlr(interface);
        if (!interface || !ctlr->lp) {
                rc = -ENODEV;
                printk(KERN_ERR PFX "bnx2fc_destroy: interface or lport not found\n");
                goto netdev_err;
        }

        timer_work_queue = interface->timer_work_queue;
        __bnx2fc_destroy(interface);
        destroy_workqueue(timer_work_queue);

netdev_err:
        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();
        return rc;
}

static void bnx2fc_destroy_work(struct work_struct *work)
{
        struct fcoe_port *port;
        struct fc_lport *lport;

        port = container_of(work, struct fcoe_port, destroy_work);
        lport = port->lport;

        BNX2FC_HBA_DBG(lport, "Entered bnx2fc_destroy_work\n");

        bnx2fc_if_destroy(lport);
}

static void bnx2fc_unbind_adapter_devices(struct bnx2fc_hba *hba)
{
        bnx2fc_free_fw_resc(hba);
        bnx2fc_free_task_ctx(hba);
}

/**
 * bnx2fc_bind_adapter_devices - binds bnx2fc adapter with the associated
 *                      pci structure
 *
 * @hba:                Adapter instance
 */
static int bnx2fc_bind_adapter_devices(struct bnx2fc_hba *hba)
{
        if (bnx2fc_setup_task_ctx(hba))
                goto mem_err;

        if (bnx2fc_setup_fw_resc(hba))
                goto mem_err;

        return 0;
mem_err:
        bnx2fc_unbind_adapter_devices(hba);
        return -ENOMEM;
}

static int bnx2fc_bind_pcidev(struct bnx2fc_hba *hba)
{
        struct cnic_dev *cnic;
        struct pci_dev *pdev;

        if (!hba->cnic) {
                printk(KERN_ERR PFX "cnic is NULL\n");
                return -ENODEV;
        }
        cnic = hba->cnic;
        pdev = hba->pcidev = cnic->pcidev;
        if (!hba->pcidev)
                return -ENODEV;

        switch (pdev->device) {
        case PCI_DEVICE_ID_NX2_57710:
                strncpy(hba->chip_num, "BCM57710", BCM_CHIP_LEN);
                break;
        case PCI_DEVICE_ID_NX2_57711:
                strncpy(hba->chip_num, "BCM57711", BCM_CHIP_LEN);
                break;
        case PCI_DEVICE_ID_NX2_57712:
        case PCI_DEVICE_ID_NX2_57712_MF:
        case PCI_DEVICE_ID_NX2_57712_VF:
                strncpy(hba->chip_num, "BCM57712", BCM_CHIP_LEN);
                break;
        case PCI_DEVICE_ID_NX2_57800:
        case PCI_DEVICE_ID_NX2_57800_MF:
        case PCI_DEVICE_ID_NX2_57800_VF:
                strncpy(hba->chip_num, "BCM57800", BCM_CHIP_LEN);
                break;
        case PCI_DEVICE_ID_NX2_57810:
        case PCI_DEVICE_ID_NX2_57810_MF:
        case PCI_DEVICE_ID_NX2_57810_VF:
                strncpy(hba->chip_num, "BCM57810", BCM_CHIP_LEN);
                break;
        case PCI_DEVICE_ID_NX2_57840:
        case PCI_DEVICE_ID_NX2_57840_MF:
        case PCI_DEVICE_ID_NX2_57840_VF:
        case PCI_DEVICE_ID_NX2_57840_2_20:
        case PCI_DEVICE_ID_NX2_57840_4_10:
                strncpy(hba->chip_num, "BCM57840", BCM_CHIP_LEN);
                break;
        default:
                pr_err(PFX "Unknown device id 0x%x\n", pdev->device);
                break;
        }
        pci_dev_get(hba->pcidev);
        return 0;
}

static void bnx2fc_unbind_pcidev(struct bnx2fc_hba *hba)
{
        if (hba->pcidev) {
                hba->chip_num[0] = '\0';
                pci_dev_put(hba->pcidev);
        }
        hba->pcidev = NULL;
}

/**
 * bnx2fc_ulp_get_stats - cnic callback to populate FCoE stats
 *
 * @handle:    transport handle pointing to adapter structure
 */
static int bnx2fc_ulp_get_stats(void *handle)
{
        struct bnx2fc_hba *hba = handle;
        struct cnic_dev *cnic;
        struct fcoe_stats_info *stats_addr;

        if (!hba)
                return -EINVAL;

        cnic = hba->cnic;
        stats_addr = &cnic->stats_addr->fcoe_stat;
        if (!stats_addr)
                return -EINVAL;

        strncpy(stats_addr->version, BNX2FC_VERSION,
                sizeof(stats_addr->version));
        stats_addr->txq_size = BNX2FC_SQ_WQES_MAX;
        stats_addr->rxq_size = BNX2FC_CQ_WQES_MAX;

        return 0;
}


/**
 * bnx2fc_ulp_start - cnic callback to initialize & start adapter instance
 *
 * @handle:     transport handle pointing to adapter structure
 *
 * This function maps adapter structure to pcidev structure and initiates
 *      firmware handshake to enable/initialize on-chip FCoE components.
 *      This bnx2fc - cnic interface api callback is used after following
 *      conditions are met -
 *      a) underlying network interface is up (marked by event NETDEV_UP
 *              from netdev
 *      b) bnx2fc adatper structure is registered.
 */
static void bnx2fc_ulp_start(void *handle)
{
        struct bnx2fc_hba *hba = handle;
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        struct fc_lport *lport;

        mutex_lock(&bnx2fc_dev_lock);

        if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
                bnx2fc_fw_init(hba);

        BNX2FC_MISC_DBG("bnx2fc started.\n");

        list_for_each_entry(interface, &if_list, list) {
                if (interface->hba == hba) {
                        ctlr = bnx2fc_to_ctlr(interface);
                        lport = ctlr->lp;
                        /* Kick off Fabric discovery*/
                        printk(KERN_ERR PFX "ulp_init: start discovery\n");
                        lport->tt.frame_send = bnx2fc_xmit;
                        bnx2fc_start_disc(interface);
                }
        }

        mutex_unlock(&bnx2fc_dev_lock);
}

static void bnx2fc_port_shutdown(struct fc_lport *lport)
{
        BNX2FC_MISC_DBG("Entered %s\n", __func__);
        fc_fabric_logoff(lport);
        fc_lport_destroy(lport);
}

static void bnx2fc_stop(struct bnx2fc_interface *interface)
{
        struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
        struct fc_lport *lport;
        struct fc_lport *vport;

        if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags))
                return;

        lport = ctlr->lp;
        bnx2fc_port_shutdown(lport);

        mutex_lock(&lport->lp_mutex);
        list_for_each_entry(vport, &lport->vports, list)
                fc_host_port_type(vport->host) =
                                        FC_PORTTYPE_UNKNOWN;
        mutex_unlock(&lport->lp_mutex);
        fc_host_port_type(lport->host) = FC_PORTTYPE_UNKNOWN;
        fcoe_ctlr_link_down(ctlr);
        fcoe_clean_pending_queue(lport);
}

static int bnx2fc_fw_init(struct bnx2fc_hba *hba)
{
#define BNX2FC_INIT_POLL_TIME           (1000 / HZ)
        int rc = -1;
        int i = HZ;

        rc = bnx2fc_bind_adapter_devices(hba);
        if (rc) {
                printk(KERN_ALERT PFX
                        "bnx2fc_bind_adapter_devices failed - rc = %d\n", rc);
                goto err_out;
        }

        rc = bnx2fc_send_fw_fcoe_init_msg(hba);
        if (rc) {
                printk(KERN_ALERT PFX
                        "bnx2fc_send_fw_fcoe_init_msg failed - rc = %d\n", rc);
                goto err_unbind;
        }

        /*
         * Wait until the adapter init message is complete, and adapter
         * state is UP.
         */
        while (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) && i--)
                msleep(BNX2FC_INIT_POLL_TIME);

        if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) {
                printk(KERN_ERR PFX "bnx2fc_start: %s failed to initialize.  "
                                "Ignoring...\n",
                                hba->cnic->netdev->name);
                rc = -1;
                goto err_unbind;
        }


        set_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags);
        return 0;

err_unbind:
        bnx2fc_unbind_adapter_devices(hba);
err_out:
        return rc;
}

static void bnx2fc_fw_destroy(struct bnx2fc_hba *hba)
{
        if (test_and_clear_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags)) {
                if (bnx2fc_send_fw_fcoe_destroy_msg(hba) == 0) {
                        timer_setup(&hba->destroy_timer, bnx2fc_destroy_timer,
                                    0);
                        hba->destroy_timer.expires = BNX2FC_FW_TIMEOUT +
                                                                jiffies;
                        add_timer(&hba->destroy_timer);
                        wait_event_interruptible(hba->destroy_wait,
                                        test_bit(BNX2FC_FLAG_DESTROY_CMPL,
                                                 &hba->flags));
                        clear_bit(BNX2FC_FLAG_DESTROY_CMPL, &hba->flags);
                        /* This should never happen */
                        if (signal_pending(current))
                                flush_signals(current);

                        del_timer_sync(&hba->destroy_timer);
                }
                bnx2fc_unbind_adapter_devices(hba);
        }
}

/**
 * bnx2fc_ulp_stop - cnic callback to shutdown adapter instance
 *
 * @handle:     transport handle pointing to adapter structure
 *
 * Driver checks if adapter is already in shutdown mode, if not start
 *      the shutdown process.
 */
static void bnx2fc_ulp_stop(void *handle)
{
        struct bnx2fc_hba *hba = handle;
        struct bnx2fc_interface *interface;

        printk(KERN_ERR "ULP_STOP\n");

        mutex_lock(&bnx2fc_dev_lock);
        if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &hba->flags))
                goto exit;
        list_for_each_entry(interface, &if_list, list) {
                if (interface->hba == hba)
                        bnx2fc_stop(interface);
        }
        BUG_ON(hba->num_ofld_sess != 0);

        mutex_lock(&hba->hba_mutex);
        clear_bit(ADAPTER_STATE_UP, &hba->adapter_state);
        clear_bit(ADAPTER_STATE_GOING_DOWN,
                  &hba->adapter_state);

        clear_bit(ADAPTER_STATE_READY, &hba->adapter_state);
        mutex_unlock(&hba->hba_mutex);

        bnx2fc_fw_destroy(hba);
exit:
        mutex_unlock(&bnx2fc_dev_lock);
}

static void bnx2fc_start_disc(struct bnx2fc_interface *interface)
{

        struct fcoe_ctlr *ctlr = bnx2fc_to_ctlr(interface);
        struct fc_lport *lport;
        int wait_cnt = 0;

        BNX2FC_MISC_DBG("Entered %s\n", __func__);
        /* Kick off FIP/FLOGI */
        if (!test_bit(BNX2FC_FLAG_FW_INIT_DONE, &interface->hba->flags)) {
                printk(KERN_ERR PFX "Init not done yet\n");
                return;
        }

        lport = ctlr->lp;
        BNX2FC_HBA_DBG(lport, "calling fc_fabric_login\n");

        if (!bnx2fc_link_ok(lport) && interface->enabled) {
                BNX2FC_HBA_DBG(lport, "ctlr_link_up\n");
                fcoe_ctlr_link_up(ctlr);
                fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
                set_bit(ADAPTER_STATE_READY, &interface->hba->adapter_state);
        }

        /* wait for the FCF to be selected before issuing FLOGI */
        while (!ctlr->sel_fcf) {
                msleep(250);
                /* give up after 3 secs */
                if (++wait_cnt > 12)
                        break;
        }

        /* Reset max receive frame size to default */
        if (fc_set_mfs(lport, BNX2FC_MFS))
                return;

        fc_lport_init(lport);
        fc_fabric_login(lport);
}


/**
 * bnx2fc_ulp_init - Initialize an adapter instance
 *
 * @dev :       cnic device handle
 * Called from cnic_register_driver() context to initialize all
 *      enumerated cnic devices. This routine allocates adapter structure
 *      and other device specific resources.
 */
static void bnx2fc_ulp_init(struct cnic_dev *dev)
{
        struct bnx2fc_hba *hba;
        int rc = 0;

        BNX2FC_MISC_DBG("Entered %s\n", __func__);
        /* bnx2fc works only when bnx2x is loaded */
        if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags) ||
            (dev->max_fcoe_conn == 0)) {
                printk(KERN_ERR PFX "bnx2fc FCoE not supported on %s,"
                                    " flags: %lx fcoe_conn: %d\n",
                        dev->netdev->name, dev->flags, dev->max_fcoe_conn);
                return;
        }

        hba = bnx2fc_hba_create(dev);
        if (!hba) {
                printk(KERN_ERR PFX "hba initialization failed\n");
                return;
        }

        pr_info(PFX "FCoE initialized for %s.\n", dev->netdev->name);

        /* Add HBA to the adapter list */
        mutex_lock(&bnx2fc_dev_lock);
        list_add_tail(&hba->list, &adapter_list);
        adapter_count++;
        mutex_unlock(&bnx2fc_dev_lock);

        dev->fcoe_cap = &hba->fcoe_cap;
        clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
        rc = dev->register_device(dev, CNIC_ULP_FCOE,
                                                (void *) hba);
        if (rc)
                printk(KERN_ERR PFX "register_device failed, rc = %d\n", rc);
        else
                set_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic);
}

/* Assumes rtnl_lock and the bnx2fc_dev_lock are already taken */
static int __bnx2fc_disable(struct fcoe_ctlr *ctlr)
{
        struct bnx2fc_interface *interface = fcoe_ctlr_priv(ctlr);

        if (interface->enabled) {
                if (!ctlr->lp) {
                        pr_err(PFX "__bnx2fc_disable: lport not found\n");
                        return -ENODEV;
                } else {
                        interface->enabled = false;
                        fcoe_ctlr_link_down(ctlr);
                        fcoe_clean_pending_queue(ctlr->lp);
                }
        }
        return 0;
}

/*
 * Deperecated: Use bnx2fc_enabled()
 */
static int bnx2fc_disable(struct net_device *netdev)
{
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        int rc = 0;

        rtnl_lock();
        mutex_lock(&bnx2fc_dev_lock);

        interface = bnx2fc_interface_lookup(netdev);
        ctlr = bnx2fc_to_ctlr(interface);

        if (!interface) {
                rc = -ENODEV;
                pr_err(PFX "bnx2fc_disable: interface not found\n");
        } else {
                rc = __bnx2fc_disable(ctlr);
        }
        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();
        return rc;
}

static uint bnx2fc_npiv_create_vports(struct fc_lport *lport,
                                      struct cnic_fc_npiv_tbl *npiv_tbl)
{
        struct fc_vport_identifiers vpid;
        uint i, created = 0;
        u64 wwnn = 0;
        char wwpn_str[32];
        char wwnn_str[32];

        if (npiv_tbl->count > MAX_NPIV_ENTRIES) {
                BNX2FC_HBA_DBG(lport, "Exceeded count max of npiv table\n");
                goto done;
        }

        /* Sanity check the first entry to make sure it's not 0 */
        if (wwn_to_u64(npiv_tbl->wwnn[0]) == 0 &&
            wwn_to_u64(npiv_tbl->wwpn[0]) == 0) {
                BNX2FC_HBA_DBG(lport, "First NPIV table entries invalid.\n");
                goto done;
        }

        vpid.roles = FC_PORT_ROLE_FCP_INITIATOR;
        vpid.vport_type = FC_PORTTYPE_NPIV;
        vpid.disable = false;

        for (i = 0; i < npiv_tbl->count; i++) {
                wwnn = wwn_to_u64(npiv_tbl->wwnn[i]);
                if (wwnn == 0) {
                        /*
                         * If we get a 0 element from for the WWNN then assume
                         * the WWNN should be the same as the physical port.
                         */
                        wwnn = lport->wwnn;
                }
                vpid.node_name = wwnn;
                vpid.port_name = wwn_to_u64(npiv_tbl->wwpn[i]);
                scnprintf(vpid.symbolic_name, sizeof(vpid.symbolic_name),
                    "NPIV[%u]:%016llx-%016llx",
                    created, vpid.port_name, vpid.node_name);
                fcoe_wwn_to_str(vpid.node_name, wwnn_str, sizeof(wwnn_str));
                fcoe_wwn_to_str(vpid.port_name, wwpn_str, sizeof(wwpn_str));
                BNX2FC_HBA_DBG(lport, "Creating vport %s:%s.\n", wwnn_str,
                    wwpn_str);
                if (fc_vport_create(lport->host, 0, &vpid))
                        created++;
                else
                        BNX2FC_HBA_DBG(lport, "Failed to create vport\n");
        }
done:
        return created;
}

static int __bnx2fc_enable(struct fcoe_ctlr *ctlr)
{
        struct bnx2fc_interface *interface = fcoe_ctlr_priv(ctlr);
        struct bnx2fc_hba *hba;
        struct cnic_fc_npiv_tbl *npiv_tbl;
        struct fc_lport *lport;

        if (!interface->enabled) {
                if (!ctlr->lp) {
                        pr_err(PFX "__bnx2fc_enable: lport not found\n");
                        return -ENODEV;
                } else if (!bnx2fc_link_ok(ctlr->lp)) {
                        fcoe_ctlr_link_up(ctlr);
                        interface->enabled = true;
                }
        }

        /* Create static NPIV ports if any are contained in NVRAM */
        hba = interface->hba;
        lport = ctlr->lp;

        if (!hba)
                goto done;

        if (!hba->cnic)
                goto done;

        if (!lport)
                goto done;

        if (!lport->host)
                goto done;

        if (!hba->cnic->get_fc_npiv_tbl)
                goto done;

        npiv_tbl = kzalloc(sizeof(struct cnic_fc_npiv_tbl), GFP_KERNEL);
        if (!npiv_tbl)
                goto done;

        if (hba->cnic->get_fc_npiv_tbl(hba->cnic, npiv_tbl))
                goto done_free;

        bnx2fc_npiv_create_vports(lport, npiv_tbl);
done_free:
        kfree(npiv_tbl);
done:
        return 0;
}

/*
 * Deprecated: Use bnx2fc_enabled()
 */
static int bnx2fc_enable(struct net_device *netdev)
{
        struct bnx2fc_interface *interface;
        struct fcoe_ctlr *ctlr;
        int rc = 0;

        rtnl_lock();
        mutex_lock(&bnx2fc_dev_lock);

        interface = bnx2fc_interface_lookup(netdev);
        ctlr = bnx2fc_to_ctlr(interface);
        if (!interface) {
                rc = -ENODEV;
                pr_err(PFX "bnx2fc_enable: interface not found\n");
        } else {
                rc = __bnx2fc_enable(ctlr);
        }

        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();
        return rc;
}

/**
 * bnx2fc_ctlr_enabled() - Enable or disable an FCoE Controller
 * @cdev: The FCoE Controller that is being enabled or disabled
 *
 * fcoe_sysfs will ensure that the state of 'enabled' has
 * changed, so no checking is necessary here. This routine simply
 * calls fcoe_enable or fcoe_disable, both of which are deprecated.
 * When those routines are removed the functionality can be merged
 * here.
 */
static int bnx2fc_ctlr_enabled(struct fcoe_ctlr_device *cdev)
{
        struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);

        switch (cdev->enabled) {
        case FCOE_CTLR_ENABLED:
                return __bnx2fc_enable(ctlr);
        case FCOE_CTLR_DISABLED:
                return __bnx2fc_disable(ctlr);
        case FCOE_CTLR_UNUSED:
        default:
                return -ENOTSUPP;
        }
}

enum bnx2fc_create_link_state {
        BNX2FC_CREATE_LINK_DOWN,
        BNX2FC_CREATE_LINK_UP,
};

/**
 * _bnx2fc_create() - Create bnx2fc FCoE interface
 * @netdev  :   The net_device object the Ethernet interface to create on
 * @fip_mode:   The FIP mode for this creation
 * @link_state: The ctlr link state on creation
 *
 * Called from either the libfcoe 'create' module parameter
 * via fcoe_create or from fcoe_syfs's ctlr_create file.
 *
 * libfcoe's 'create' module parameter is deprecated so some
 * consolidation of code can be done when that interface is
 * removed.
 *
 * Returns: 0 for success
 */
static int _bnx2fc_create(struct net_device *netdev,
                          enum fip_mode fip_mode,
                          enum bnx2fc_create_link_state link_state)
{
        struct fcoe_ctlr_device *cdev;
        struct fcoe_ctlr *ctlr;
        struct bnx2fc_interface *interface;
        struct bnx2fc_hba *hba;
        struct net_device *phys_dev = netdev;
        struct fc_lport *lport;
        struct ethtool_drvinfo drvinfo;
        int rc = 0;
        int vlan_id = 0;

        BNX2FC_MISC_DBG("Entered bnx2fc_create\n");
        if (fip_mode != FIP_MODE_FABRIC) {
                printk(KERN_ERR "fip mode not FABRIC\n");
                return -EIO;
        }

        rtnl_lock();

        mutex_lock(&bnx2fc_dev_lock);

        if (!try_module_get(THIS_MODULE)) {
                rc = -EINVAL;
                goto mod_err;
        }

        /* obtain physical netdev */
        if (is_vlan_dev(netdev))
                phys_dev = vlan_dev_real_dev(netdev);

        /* verify if the physical device is a netxtreme2 device */
        if (phys_dev->ethtool_ops && phys_dev->ethtool_ops->get_drvinfo) {
                memset(&drvinfo, 0, sizeof(drvinfo));
                phys_dev->ethtool_ops->get_drvinfo(phys_dev, &drvinfo);
                if (strncmp(drvinfo.driver, "bnx2x", strlen("bnx2x"))) {
                        printk(KERN_ERR PFX "Not a netxtreme2 device\n");
                        rc = -EINVAL;
                        goto netdev_err;
                }
        } else {
                printk(KERN_ERR PFX "unable to obtain drv_info\n");
                rc = -EINVAL;
                goto netdev_err;
        }

        /* obtain interface and initialize rest of the structure */
        hba = bnx2fc_hba_lookup(phys_dev);
        if (!hba) {
                rc = -ENODEV;
                printk(KERN_ERR PFX "bnx2fc_create: hba not found\n");
                goto netdev_err;
        }

        if (bnx2fc_interface_lookup(netdev)) {
                rc = -EEXIST;
                goto netdev_err;
        }

        interface = bnx2fc_interface_create(hba, netdev, fip_mode);
        if (!interface) {
                printk(KERN_ERR PFX "bnx2fc_interface_create failed\n");
                rc = -ENOMEM;
                goto netdev_err;
        }

        if (is_vlan_dev(netdev)) {
                vlan_id = vlan_dev_vlan_id(netdev);
                interface->vlan_enabled = 1;
        }

        ctlr = bnx2fc_to_ctlr(interface);
        cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
        interface->vlan_id = vlan_id;
        interface->tm_timeout = BNX2FC_TM_TIMEOUT;

        interface->timer_work_queue =
                        create_singlethread_workqueue("bnx2fc_timer_wq");
        if (!interface->timer_work_queue) {
                printk(KERN_ERR PFX "ulp_init could not create timer_wq\n");
                rc = -EINVAL;
                goto ifput_err;
        }

        lport = bnx2fc_if_create(interface, &cdev->dev, 0);
        if (!lport) {
                printk(KERN_ERR PFX "Failed to create interface (%s)\n",
                        netdev->name);
                rc = -EINVAL;
                goto if_create_err;
        }

        /* Add interface to if_list */
        list_add_tail(&interface->list, &if_list);

        lport->boot_time = jiffies;

        /* Make this master N_port */
        ctlr->lp = lport;

        if (link_state == BNX2FC_CREATE_LINK_UP)
                cdev->enabled = FCOE_CTLR_ENABLED;
        else
                cdev->enabled = FCOE_CTLR_DISABLED;

        if (link_state == BNX2FC_CREATE_LINK_UP &&
            !bnx2fc_link_ok(lport)) {
                fcoe_ctlr_link_up(ctlr);
                fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
                set_bit(ADAPTER_STATE_READY, &interface->hba->adapter_state);
        }

        BNX2FC_HBA_DBG(lport, "create: START DISC\n");
        bnx2fc_start_disc(interface);

        if (link_state == BNX2FC_CREATE_LINK_UP)
                interface->enabled = true;

        /*
         * Release from kref_init in bnx2fc_interface_setup, on success
         * lport should be holding a reference taken in bnx2fc_if_create
         */
        bnx2fc_interface_put(interface);
        /* put netdev that was held while calling dev_get_by_name */
        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();
        return 0;

if_create_err:
        destroy_workqueue(interface->timer_work_queue);
ifput_err:
        bnx2fc_net_cleanup(interface);
        bnx2fc_interface_put(interface);
        goto mod_err;
netdev_err:
        module_put(THIS_MODULE);
mod_err:
        mutex_unlock(&bnx2fc_dev_lock);
        rtnl_unlock();
        return rc;
}

/**
 * bnx2fc_create() - Create a bnx2fc interface
 * @netdev  : The net_device object the Ethernet interface to create on
 * @fip_mode: The FIP mode for this creation
 *
 * Called from fcoe transport
 *
 * Returns: 0 for success
 */
static int bnx2fc_create(struct net_device *netdev, enum fip_mode fip_mode)
{
        return _bnx2fc_create(netdev, fip_mode, BNX2FC_CREATE_LINK_UP);
}

/**
 * bnx2fc_ctlr_alloc() - Allocate a bnx2fc interface from fcoe_sysfs
 * @netdev: The net_device to be used by the allocated FCoE Controller
 *
 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr
 * in a link_down state. The allows the user an opportunity to configure
 * the FCoE Controller from sysfs before enabling the FCoE Controller.
 *
 * Creating in with this routine starts the FCoE Controller in Fabric
 * mode. The user can change to VN2VN or another mode before enabling.
 */
static int bnx2fc_ctlr_alloc(struct net_device *netdev)
{
        return _bnx2fc_create(netdev, FIP_MODE_FABRIC,
                              BNX2FC_CREATE_LINK_DOWN);
}

/**
 * bnx2fc_find_hba_for_cnic - maps cnic instance to bnx2fc hba instance
 *
 * @cnic:       Pointer to cnic device instance
 *
 **/
static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic)
{
        struct bnx2fc_hba *hba;

        /* Called with bnx2fc_dev_lock held */
        list_for_each_entry(hba, &adapter_list, list) {
                if (hba->cnic == cnic)
                        return hba;
        }
        return NULL;
}

static struct bnx2fc_interface *bnx2fc_interface_lookup(struct net_device
                                                        *netdev)
{
        struct bnx2fc_interface *interface;

        /* Called with bnx2fc_dev_lock held */
        list_for_each_entry(interface, &if_list, list) {
                if (interface->netdev == netdev)
                        return interface;
        }
        return NULL;
}

static struct bnx2fc_hba *bnx2fc_hba_lookup(struct net_device
                                                      *phys_dev)
{
        struct bnx2fc_hba *hba;

        /* Called with bnx2fc_dev_lock held */
        list_for_each_entry(hba, &adapter_list, list) {
                if (hba->phys_dev == phys_dev)
                        return hba;
        }
        printk(KERN_ERR PFX "adapter_lookup: hba NULL\n");
        return NULL;
}

/**
 * bnx2fc_ulp_exit - shuts down adapter instance and frees all resources
 *
 * @dev:        cnic device handle
 */
static void bnx2fc_ulp_exit(struct cnic_dev *dev)
{
        struct bnx2fc_hba *hba;
        struct bnx2fc_interface *interface, *tmp;

        BNX2FC_MISC_DBG("Entered bnx2fc_ulp_exit\n");

        if (!test_bit(CNIC_F_BNX2X_CLASS, &dev->flags)) {
                printk(KERN_ERR PFX "bnx2fc port check: %s, flags: %lx\n",
                        dev->netdev->name, dev->flags);
                return;
        }

        mutex_lock(&bnx2fc_dev_lock);
        hba = bnx2fc_find_hba_for_cnic(dev);
        if (!hba) {
                printk(KERN_ERR PFX "bnx2fc_ulp_exit: hba not found, dev 0%p\n",
                       dev);
                mutex_unlock(&bnx2fc_dev_lock);
                return;
        }

        list_del_init(&hba->list);
        adapter_count--;

        list_for_each_entry_safe(interface, tmp, &if_list, list)
                /* destroy not called yet, move to quiesced list */
                if (interface->hba == hba)
                        __bnx2fc_destroy(interface);
        mutex_unlock(&bnx2fc_dev_lock);

        /* Ensure ALL destroy work has been completed before return */
        flush_workqueue(bnx2fc_wq);

        bnx2fc_ulp_stop(hba);
        /* unregister cnic device */
        if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED, &hba->reg_with_cnic))
                hba->cnic->unregister_device(hba->cnic, CNIC_ULP_FCOE);
        bnx2fc_hba_destroy(hba);
}

static void bnx2fc_rport_terminate_io(struct fc_rport *rport)
{
        /* This is a no-op */
}

/**
 * bnx2fc_fcoe_reset - Resets the fcoe
 *
 * @shost: shost the reset is from
 *
 * Returns: always 0
 */
static int bnx2fc_fcoe_reset(struct Scsi_Host *shost)
{
        struct fc_lport *lport = shost_priv(shost);
        fc_lport_reset(lport);
        return 0;
}


static bool bnx2fc_match(struct net_device *netdev)
{
        struct net_device *phys_dev = netdev;

        mutex_lock(&bnx2fc_dev_lock);
        if (is_vlan_dev(netdev))
                phys_dev = vlan_dev_real_dev(netdev);

        if (bnx2fc_hba_lookup(phys_dev)) {
                mutex_unlock(&bnx2fc_dev_lock);
                return true;
        }

        mutex_unlock(&bnx2fc_dev_lock);
        return false;
}


static struct fcoe_transport bnx2fc_transport = {
        .name = {"bnx2fc"},
        .attached = false,
        .list = LIST_HEAD_INIT(bnx2fc_transport.list),
        .alloc = bnx2fc_ctlr_alloc,
        .match = bnx2fc_match,
        .create = bnx2fc_create,
        .destroy = bnx2fc_destroy,
        .enable = bnx2fc_enable,
        .disable = bnx2fc_disable,
};

/**
 * bnx2fc_cpu_online - Create a receive thread for an  online CPU
 *
 * @cpu: cpu index for the online cpu
 */
static int bnx2fc_cpu_online(unsigned int cpu)
{
        struct bnx2fc_percpu_s *p;
        struct task_struct *thread;

        p = &per_cpu(bnx2fc_percpu, cpu);

        thread = kthread_create_on_node(bnx2fc_percpu_io_thread,
                                        (void *)p, cpu_to_node(cpu),
                                        "bnx2fc_thread/%d", cpu);
        if (IS_ERR(thread))
                return PTR_ERR(thread);

        /* bind thread to the cpu */
        kthread_bind(thread, cpu);
        p->iothread = thread;
        wake_up_process(thread);
        return 0;
}

static int bnx2fc_cpu_offline(unsigned int cpu)
{
        struct bnx2fc_percpu_s *p;
        struct task_struct *thread;
        struct bnx2fc_work *work, *tmp;

        BNX2FC_MISC_DBG("destroying io thread for CPU %d\n", cpu);

        /* Prevent any new work from being queued for this CPU */
        p = &per_cpu(bnx2fc_percpu, cpu);
        spin_lock_bh(&p->fp_work_lock);
        thread = p->iothread;
        p->iothread = NULL;

        /* Free all work in the list */
        list_for_each_entry_safe(work, tmp, &p->work_list, list) {
                list_del_init(&work->list);
                bnx2fc_process_cq_compl(work->tgt, work->wqe, work->rq_data,
                                        work->num_rq, work->task);
                kfree(work);
        }

        spin_unlock_bh(&p->fp_work_lock);

        if (thread)
                kthread_stop(thread);
        return 0;
}

static int bnx2fc_slave_configure(struct scsi_device *sdev)
{
        if (!bnx2fc_queue_depth)
                return 0;

        scsi_change_queue_depth(sdev, bnx2fc_queue_depth);
        return 0;
}

static enum cpuhp_state bnx2fc_online_state;

/**
 * bnx2fc_mod_init - module init entry point
 *
 * Initialize driver wide global data structures, and register
 * with cnic module
 **/
static int __init bnx2fc_mod_init(void)
{
        struct fcoe_percpu_s *bg;
        struct task_struct *l2_thread;
        int rc = 0;
        unsigned int cpu = 0;
        struct bnx2fc_percpu_s *p;

        printk(KERN_INFO PFX "%s", version);

        /* register as a fcoe transport */
        rc = fcoe_transport_attach(&bnx2fc_transport);
        if (rc) {
                printk(KERN_ERR "failed to register an fcoe transport, check "
                        "if libfcoe is loaded\n");
                goto out;
        }

        INIT_LIST_HEAD(&adapter_list);
        INIT_LIST_HEAD(&if_list);
        mutex_init(&bnx2fc_dev_lock);
        adapter_count = 0;

        /* Attach FC transport template */
        rc = bnx2fc_attach_transport();
        if (rc)
                goto detach_ft;

        bnx2fc_wq = alloc_workqueue("bnx2fc", 0, 0);
        if (!bnx2fc_wq) {
                rc = -ENOMEM;
                goto release_bt;
        }

        bg = &bnx2fc_global;
        skb_queue_head_init(&bg->fcoe_rx_list);
        l2_thread = kthread_create(bnx2fc_l2_rcv_thread,
                                   (void *)bg,
                                   "bnx2fc_l2_thread");
        if (IS_ERR(l2_thread)) {
                rc = PTR_ERR(l2_thread);
                goto free_wq;
        }
        wake_up_process(l2_thread);
        spin_lock_bh(&bg->fcoe_rx_list.lock);
        bg->kthread = l2_thread;
        spin_unlock_bh(&bg->fcoe_rx_list.lock);

        for_each_possible_cpu(cpu) {
                p = &per_cpu(bnx2fc_percpu, cpu);
                INIT_LIST_HEAD(&p->work_list);
                spin_lock_init(&p->fp_work_lock);
        }

        rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2fc:online",
                               bnx2fc_cpu_online, bnx2fc_cpu_offline);
        if (rc < 0)
                goto stop_thread;
        bnx2fc_online_state = rc;

        cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
        return 0;

stop_thread:
        kthread_stop(l2_thread);
free_wq:
        destroy_workqueue(bnx2fc_wq);
release_bt:
        bnx2fc_release_transport();
detach_ft:
        fcoe_transport_detach(&bnx2fc_transport);
out:
        return rc;
}

static void __exit bnx2fc_mod_exit(void)
{
        LIST_HEAD(to_be_deleted);
        struct bnx2fc_hba *hba, *next;
        struct fcoe_percpu_s *bg;
        struct task_struct *l2_thread;
        struct sk_buff *skb;

        /*
         * NOTE: Since cnic calls register_driver routine rtnl_lock,
         * it will have higher precedence than bnx2fc_dev_lock.
         * unregister_device() cannot be called with bnx2fc_dev_lock
         * held.
         */
        mutex_lock(&bnx2fc_dev_lock);
        list_splice_init(&adapter_list, &to_be_deleted);
        adapter_count = 0;
        mutex_unlock(&bnx2fc_dev_lock);

        /* Unregister with cnic */
        list_for_each_entry_safe(hba, next, &to_be_deleted, list) {
                list_del_init(&hba->list);
                printk(KERN_ERR PFX "MOD_EXIT:destroy hba = 0x%p\n",
                       hba);
                bnx2fc_ulp_stop(hba);
                /* unregister cnic device */
                if (test_and_clear_bit(BNX2FC_CNIC_REGISTERED,
                                       &hba->reg_with_cnic))
                        hba->cnic->unregister_device(hba->cnic,
                                                         CNIC_ULP_FCOE);
                bnx2fc_hba_destroy(hba);
        }
        cnic_unregister_driver(CNIC_ULP_FCOE);

        /* Destroy global thread */
        bg = &bnx2fc_global;
        spin_lock_bh(&bg->fcoe_rx_list.lock);
        l2_thread = bg->kthread;
        bg->kthread = NULL;
        while ((skb = __skb_dequeue(&bg->fcoe_rx_list)) != NULL)
                kfree_skb(skb);

        spin_unlock_bh(&bg->fcoe_rx_list.lock);

        if (l2_thread)
                kthread_stop(l2_thread);

        cpuhp_remove_state(bnx2fc_online_state);

        destroy_workqueue(bnx2fc_wq);
        /*
         * detach from scsi transport
         * must happen after all destroys are done
         */
        bnx2fc_release_transport();

        /* detach from fcoe transport */
        fcoe_transport_detach(&bnx2fc_transport);
}

module_init(bnx2fc_mod_init);
module_exit(bnx2fc_mod_exit);

static struct fcoe_sysfs_function_template bnx2fc_fcoe_sysfs_templ = {
        .set_fcoe_ctlr_enabled = bnx2fc_ctlr_enabled,
        .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
        .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
        .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
        .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
        .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
        .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,

        .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
        .get_fcoe_fcf_vlan_id = bnx2fc_fcf_get_vlan_id,
};

static struct fc_function_template bnx2fc_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) +
                                sizeof(struct bnx2fc_rport)),
        .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 = bnx2fc_get_host_stats,

        .issue_fc_host_lip = bnx2fc_fcoe_reset,

        .terminate_rport_io = bnx2fc_rport_terminate_io,

        .vport_create = bnx2fc_vport_create,
        .vport_delete = bnx2fc_vport_destroy,
        .vport_disable = bnx2fc_vport_disable,
        .bsg_request = fc_lport_bsg_request,
};

static struct fc_function_template bnx2fc_vport_xport_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) +
                                sizeof(struct bnx2fc_rport)),
        .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 = bnx2fc_fcoe_reset,
        .terminate_rport_io = fc_rport_terminate_io,
        .bsg_request = fc_lport_bsg_request,
};

/*
 * Additional scsi_host attributes.
 */
static ssize_t
bnx2fc_tm_timeout_show(struct device *dev, struct device_attribute *attr,
        char *buf)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct fc_lport *lport = shost_priv(shost);
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;

        sprintf(buf, "%u\n", interface->tm_timeout);
        return strlen(buf);
}

static ssize_t
bnx2fc_tm_timeout_store(struct device *dev,
        struct device_attribute *attr, const char *buf, size_t count)
{
        struct Scsi_Host *shost = class_to_shost(dev);
        struct fc_lport *lport = shost_priv(shost);
        struct fcoe_port *port = lport_priv(lport);
        struct bnx2fc_interface *interface = port->priv;
        int rval, val;

        rval = kstrtouint(buf, 10, &val);
        if (rval)
                return rval;
        if (val > 255)
                return -ERANGE;

        interface->tm_timeout = (u8)val;
        return strlen(buf);
}

static DEVICE_ATTR(tm_timeout, S_IRUGO|S_IWUSR, bnx2fc_tm_timeout_show,
        bnx2fc_tm_timeout_store);

static struct device_attribute *bnx2fc_host_attrs[] = {
        &dev_attr_tm_timeout,
        NULL,
};

/*
 * scsi_host_template structure used while registering with SCSI-ml
 */
static struct scsi_host_template bnx2fc_shost_template = {
        .module                 = THIS_MODULE,
        .name                   = "QLogic Offload FCoE Initiator",
        .queuecommand           = bnx2fc_queuecommand,
        .eh_timed_out           = fc_eh_timed_out,
        .eh_abort_handler       = bnx2fc_eh_abort,        /* abts */
        .eh_device_reset_handler = bnx2fc_eh_device_reset, /* lun reset */
        .eh_target_reset_handler = bnx2fc_eh_target_reset, /* tgt reset */
        .eh_host_reset_handler  = fc_eh_host_reset,
        .slave_alloc            = fc_slave_alloc,
        .change_queue_depth     = scsi_change_queue_depth,
        .this_id                = -1,
        .cmd_per_lun            = 3,
        .sg_tablesize           = BNX2FC_MAX_BDS_PER_CMD,
        .dma_boundary           = 0x7fff,
        .max_sectors            = 0x3fbf,
        .track_queue_depth      = 1,
        .slave_configure        = bnx2fc_slave_configure,
        .shost_attrs            = bnx2fc_host_attrs,
};

static struct libfc_function_template bnx2fc_libfc_fcn_templ = {
        .frame_send             = bnx2fc_xmit,
        .elsct_send             = bnx2fc_elsct_send,
        .fcp_abort_io           = bnx2fc_abort_io,
        .fcp_cleanup            = bnx2fc_cleanup,
        .get_lesb               = fcoe_get_lesb,
        .rport_event_callback   = bnx2fc_rport_event_handler,
};

/*
 * bnx2fc_cnic_cb - global template of bnx2fc - cnic driver interface
 *                      structure carrying callback function pointers
 */
static struct cnic_ulp_ops bnx2fc_cnic_cb = {
        .owner                  = THIS_MODULE,
        .cnic_init              = bnx2fc_ulp_init,
        .cnic_exit              = bnx2fc_ulp_exit,
        .cnic_start             = bnx2fc_ulp_start,