// SPDX-License-Identifier: GPL-2.0-only
/*
 *  QLogic FCoE Offload Driver
 *  Copyright (c) 2016-2018 Cavium Inc.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/highmem.h>
#include <linux/crc32.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/kthread.h>
#include <linux/phylink.h>
#include <scsi/libfc.h>
#include <scsi/scsi_host.h>
#include <scsi/fc_frame.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/cpu.h>
#include "qedf.h"
#include "qedf_dbg.h"
#include <uapi/linux/pci_regs.h>

const struct qed_fcoe_ops *qed_ops;

static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id);
static void qedf_remove(struct pci_dev *pdev);
static void qedf_shutdown(struct pci_dev *pdev);
static void qedf_schedule_recovery_handler(void *dev);
static void qedf_recovery_handler(struct work_struct *work);

/*
 * Driver module parameters.
 */
static unsigned int qedf_dev_loss_tmo = 60;
module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
MODULE_PARM_DESC(dev_loss_tmo,  " dev_loss_tmo setting for attached "
        "remote ports (default 60)");

uint qedf_debug = QEDF_LOG_INFO;
module_param_named(debug, qedf_debug, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(debug, " Debug mask. Pass '1' to enable default debugging"
        " mask");

static uint qedf_fipvlan_retries = 60;
module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
        "before giving up (default 60)");

static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
        "(default 1002).");

static int qedf_default_prio = -1;
module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
MODULE_PARM_DESC(default_prio, " Override 802.1q priority for FIP and FCoE"
        " traffic (value between 0 and 7, default 3).");

uint qedf_dump_frames;
module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
        "(default off)");

static uint qedf_queue_depth;
module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
        "by the qedf driver. Default is 0 (use OS default).");

uint qedf_io_tracing;
module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
        "into trace buffer. (default off).");

static uint qedf_max_lun = MAX_FIBRE_LUNS;
module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
        "supports. (default 0xffffffff)");

uint qedf_link_down_tmo;
module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
        "link is down by N seconds.");

bool qedf_retry_delay;
module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
        "delay handling (default off).");

static bool qedf_dcbx_no_wait;
module_param_named(dcbx_no_wait, qedf_dcbx_no_wait, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dcbx_no_wait, " Do not wait for DCBX convergence to start "
        "sending FIP VLAN requests on link up (Default: off).");

static uint qedf_dp_module;
module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
        "qed module during probe.");

static uint qedf_dp_level = QED_LEVEL_NOTICE;
module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module  "
        "during probe (0-3: 0 more verbose).");

static bool qedf_enable_recovery = true;
module_param_named(enable_recovery, qedf_enable_recovery,
                bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(enable_recovery, "Enable/disable recovery on driver/firmware "
                "interface level errors 0 = Disabled, 1 = Enabled (Default: 1).");

struct workqueue_struct *qedf_io_wq;

static struct fcoe_percpu_s qedf_global;
static DEFINE_SPINLOCK(qedf_global_lock);

static struct kmem_cache *qedf_io_work_cache;

void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
{
        int vlan_id_tmp = 0;

        vlan_id_tmp = vlan_id  | (qedf->prio << VLAN_PRIO_SHIFT);
        qedf->vlan_id = vlan_id_tmp;
        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                  "Setting vlan_id=0x%04x prio=%d.\n",
                  vlan_id_tmp, qedf->prio);
}

/* Returns true if we have a valid vlan, false otherwise */
static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
{

        while (qedf->fipvlan_retries--) {
                /* This is to catch if link goes down during fipvlan retries */
                if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
                        QEDF_ERR(&qedf->dbg_ctx, "Link not up.\n");
                        return false;
                }

                if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
                        QEDF_ERR(&qedf->dbg_ctx, "Driver unloading.\n");
                        return false;
                }

                if (qedf->vlan_id > 0) {
                        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                                  "vlan = 0x%x already set, calling ctlr_link_up.\n",
                                  qedf->vlan_id);
                        if (atomic_read(&qedf->link_state) == QEDF_LINK_UP)
                                fcoe_ctlr_link_up(&qedf->ctlr);
                        return true;
                }

                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                           "Retry %d.\n", qedf->fipvlan_retries);
                init_completion(&qedf->fipvlan_compl);
                qedf_fcoe_send_vlan_req(qedf);
                wait_for_completion_timeout(&qedf->fipvlan_compl, 1 * HZ);
        }

        return false;
}

static void qedf_handle_link_update(struct work_struct *work)
{
        struct qedf_ctx *qedf =
            container_of(work, struct qedf_ctx, link_update.work);
        int rc;

        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Entered. link_state=%d.\n",
                  atomic_read(&qedf->link_state));

        if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
                rc = qedf_initiate_fipvlan_req(qedf);
                if (rc)
                        return;

                if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
                        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                                  "Link is down, resetting vlan_id.\n");
                        qedf->vlan_id = 0;
                        return;
                }

                /*
                 * If we get here then we never received a repsonse to our
                 * fip vlan request so set the vlan_id to the default and
                 * tell FCoE that the link is up
                 */
                QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
                           "response, falling back to default VLAN %d.\n",
                           qedf_fallback_vlan);
                qedf_set_vlan_id(qedf, qedf_fallback_vlan);

                /*
                 * Zero out data_src_addr so we'll update it with the new
                 * lport port_id
                 */
                eth_zero_addr(qedf->data_src_addr);
                fcoe_ctlr_link_up(&qedf->ctlr);
        } else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
                /*
                 * If we hit here and link_down_tmo_valid is still 1 it means
                 * that link_down_tmo timed out so set it to 0 to make sure any
                 * other readers have accurate state.
                 */
                atomic_set(&qedf->link_down_tmo_valid, 0);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                    "Calling fcoe_ctlr_link_down().\n");
                fcoe_ctlr_link_down(&qedf->ctlr);
                if (qedf_wait_for_upload(qedf) == false)
                        QEDF_ERR(&qedf->dbg_ctx,
                                 "Could not upload all sessions.\n");
                /* Reset the number of FIP VLAN retries */
                qedf->fipvlan_retries = qedf_fipvlan_retries;
        }
}

#define QEDF_FCOE_MAC_METHOD_GRANGED_MAC                1
#define QEDF_FCOE_MAC_METHOD_FCF_MAP                    2
#define QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC               3
static void qedf_set_data_src_addr(struct qedf_ctx *qedf, struct fc_frame *fp)
{
        u8 *granted_mac;
        struct fc_frame_header *fh = fc_frame_header_get(fp);
        u8 fc_map[3];
        int method = 0;

        /* Get granted MAC address from FIP FLOGI payload */
        granted_mac = fr_cb(fp)->granted_mac;

        /*
         * We set the source MAC for FCoE traffic based on the Granted MAC
         * address from the switch.
         *
         * If granted_mac is non-zero, we used that.
         * If the granted_mac is zeroed out, created the FCoE MAC based on
         * the sel_fcf->fc_map and the d_id fo the FLOGI frame.
         * If sel_fcf->fc_map is 0 then we use the default FCF-MAC plus the
         * d_id of the FLOGI frame.
         */
        if (!is_zero_ether_addr(granted_mac)) {
                ether_addr_copy(qedf->data_src_addr, granted_mac);
                method = QEDF_FCOE_MAC_METHOD_GRANGED_MAC;
        } else if (qedf->ctlr.sel_fcf->fc_map != 0) {
                hton24(fc_map, qedf->ctlr.sel_fcf->fc_map);
                qedf->data_src_addr[0] = fc_map[0];
                qedf->data_src_addr[1] = fc_map[1];
                qedf->data_src_addr[2] = fc_map[2];
                qedf->data_src_addr[3] = fh->fh_d_id[0];
                qedf->data_src_addr[4] = fh->fh_d_id[1];
                qedf->data_src_addr[5] = fh->fh_d_id[2];
                method = QEDF_FCOE_MAC_METHOD_FCF_MAP;
        } else {
                fc_fcoe_set_mac(qedf->data_src_addr, fh->fh_d_id);
                method = QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC;
        }

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
            "QEDF data_src_mac=%pM method=%d.\n", qedf->data_src_addr, method);
}

static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
        void *arg)
{
        struct fc_exch *exch = fc_seq_exch(seq);
        struct fc_lport *lport = exch->lp;
        struct qedf_ctx *qedf = lport_priv(lport);

        if (!qedf) {
                QEDF_ERR(NULL, "qedf is NULL.\n");
                return;
        }

        /*
         * If ERR_PTR is set then don't try to stat anything as it will cause
         * a crash when we access fp.
         */
        if (IS_ERR(fp)) {
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
                    "fp has IS_ERR() set.\n");
                goto skip_stat;
        }

        /* Log stats for FLOGI reject */
        if (fc_frame_payload_op(fp) == ELS_LS_RJT)
                qedf->flogi_failed++;
        else if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
                /* Set the source MAC we will use for FCoE traffic */
                qedf_set_data_src_addr(qedf, fp);
                qedf->flogi_pending = 0;
        }

        /* Complete flogi_compl so we can proceed to sending ADISCs */
        complete(&qedf->flogi_compl);

skip_stat:
        /* Report response to libfc */
        fc_lport_flogi_resp(seq, fp, lport);
}

static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
        struct fc_frame *fp, unsigned int op,
        void (*resp)(struct fc_seq *,
        struct fc_frame *,
        void *),
        void *arg, u32 timeout)
{
        struct qedf_ctx *qedf = lport_priv(lport);

        /*
         * Intercept FLOGI for statistic purposes. Note we use the resp
         * callback to tell if this is really a flogi.
         */
        if (resp == fc_lport_flogi_resp) {
                qedf->flogi_cnt++;
                if (qedf->flogi_pending >= QEDF_FLOGI_RETRY_CNT) {
                        schedule_delayed_work(&qedf->stag_work, 2);
                        return NULL;
                }
                qedf->flogi_pending++;
                return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
                    arg, timeout);
        }

        return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
}

int qedf_send_flogi(struct qedf_ctx *qedf)
{
        struct fc_lport *lport;
        struct fc_frame *fp;

        lport = qedf->lport;

        if (!lport->tt.elsct_send) {
                QEDF_ERR(&qedf->dbg_ctx, "tt.elsct_send not set.\n");
                return -EINVAL;
        }

        fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
        if (!fp) {
                QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
                return -ENOMEM;
        }

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
            "Sending FLOGI to reestablish session with switch.\n");
        lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
            ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);

        init_completion(&qedf->flogi_compl);

        return 0;
}

/*
 * This function is called if link_down_tmo is in use.  If we get a link up and
 * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
 * sessions with targets.  Otherwise, just call fcoe_ctlr_link_up().
 */
static void qedf_link_recovery(struct work_struct *work)
{
        struct qedf_ctx *qedf =
            container_of(work, struct qedf_ctx, link_recovery.work);
        struct fc_lport *lport = qedf->lport;
        struct fc_rport_priv *rdata;
        bool rc;
        int retries = 30;
        int rval, i;
        struct list_head rdata_login_list;

        INIT_LIST_HEAD(&rdata_login_list);

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
            "Link down tmo did not expire.\n");

        /*
         * Essentially reset the fcoe_ctlr here without affecting the state
         * of the libfc structs.
         */
        qedf->ctlr.state = FIP_ST_LINK_WAIT;
        fcoe_ctlr_link_down(&qedf->ctlr);

        /*
         * Bring the link up before we send the fipvlan request so libfcoe
         * can select a new fcf in parallel
         */
        fcoe_ctlr_link_up(&qedf->ctlr);

        /* Since the link when down and up to verify which vlan we're on */
        qedf->fipvlan_retries = qedf_fipvlan_retries;
        rc = qedf_initiate_fipvlan_req(qedf);
        /* If getting the VLAN fails, set the VLAN to the fallback one */
        if (!rc)
                qedf_set_vlan_id(qedf, qedf_fallback_vlan);

        /*
         * We need to wait for an FCF to be selected due to the
         * fcoe_ctlr_link_up other the FLOGI will be rejected.
         */
        while (retries > 0) {
                if (qedf->ctlr.sel_fcf) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "FCF reselected, proceeding with FLOGI.\n");
                        break;
                }
                msleep(500);
                retries--;
        }

        if (retries < 1) {
                QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
                    "FCF selection.\n");
                return;
        }

        rval = qedf_send_flogi(qedf);
        if (rval)
                return;

        /* Wait for FLOGI completion before proceeding with sending ADISCs */
        i = wait_for_completion_timeout(&qedf->flogi_compl,
            qedf->lport->r_a_tov);
        if (i == 0) {
                QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
                return;
        }

        /*
         * Call lport->tt.rport_login which will cause libfc to send an
         * ADISC since the rport is in state ready.
         */
        mutex_lock(&lport->disc.disc_mutex);
        list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
                if (kref_get_unless_zero(&rdata->kref)) {
                        fc_rport_login(rdata);
                        kref_put(&rdata->kref, fc_rport_destroy);
                }
        }
        mutex_unlock(&lport->disc.disc_mutex);
}

static void qedf_update_link_speed(struct qedf_ctx *qedf,
        struct qed_link_output *link)
{
        __ETHTOOL_DECLARE_LINK_MODE_MASK(sup_caps);
        struct fc_lport *lport = qedf->lport;

        lport->link_speed = FC_PORTSPEED_UNKNOWN;
        lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;

        /* Set fc_host link speed */
        switch (link->speed) {
        case 10000:
                lport->link_speed = FC_PORTSPEED_10GBIT;
                break;
        case 25000:
                lport->link_speed = FC_PORTSPEED_25GBIT;
                break;
        case 40000:
                lport->link_speed = FC_PORTSPEED_40GBIT;
                break;
        case 50000:
                lport->link_speed = FC_PORTSPEED_50GBIT;
                break;
        case 100000:
                lport->link_speed = FC_PORTSPEED_100GBIT;
                break;
        case 20000:
                lport->link_speed = FC_PORTSPEED_20GBIT;
                break;
        default:
                lport->link_speed = FC_PORTSPEED_UNKNOWN;
                break;
        }

        /*
         * Set supported link speed by querying the supported
         * capabilities of the link.
         */

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 10000baseT_Full);
        phylink_set(sup_caps, 10000baseKX4_Full);
        phylink_set(sup_caps, 10000baseR_FEC);
        phylink_set(sup_caps, 10000baseCR_Full);
        phylink_set(sup_caps, 10000baseSR_Full);
        phylink_set(sup_caps, 10000baseLR_Full);
        phylink_set(sup_caps, 10000baseLRM_Full);
        phylink_set(sup_caps, 10000baseKR_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 25000baseKR_Full);
        phylink_set(sup_caps, 25000baseCR_Full);
        phylink_set(sup_caps, 25000baseSR_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 40000baseLR4_Full);
        phylink_set(sup_caps, 40000baseKR4_Full);
        phylink_set(sup_caps, 40000baseCR4_Full);
        phylink_set(sup_caps, 40000baseSR4_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 50000baseKR2_Full);
        phylink_set(sup_caps, 50000baseCR2_Full);
        phylink_set(sup_caps, 50000baseSR2_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 100000baseKR4_Full);
        phylink_set(sup_caps, 100000baseSR4_Full);
        phylink_set(sup_caps, 100000baseCR4_Full);
        phylink_set(sup_caps, 100000baseLR4_ER4_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;

        phylink_zero(sup_caps);
        phylink_set(sup_caps, 20000baseKR2_Full);

        if (linkmode_intersects(link->supported_caps, sup_caps))
                lport->link_supported_speeds |= FC_PORTSPEED_20GBIT;

        if (lport->host && lport->host->shost_data)
                fc_host_supported_speeds(lport->host) =
                        lport->link_supported_speeds;
}

static void qedf_bw_update(void *dev)
{
        struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
        struct qed_link_output link;

        /* Get the latest status of the link */
        qed_ops->common->get_link(qedf->cdev, &link);

        if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Ignore link update, driver getting unload.\n");
                return;
        }

        if (link.link_up) {
                if (atomic_read(&qedf->link_state) == QEDF_LINK_UP)
                        qedf_update_link_speed(qedf, &link);
                else
                        QEDF_ERR(&qedf->dbg_ctx,
                                 "Ignore bw update, link is down.\n");

        } else {
                QEDF_ERR(&qedf->dbg_ctx, "link_up is not set.\n");
        }
}

static void qedf_link_update(void *dev, struct qed_link_output *link)
{
        struct qedf_ctx *qedf = (struct qedf_ctx *)dev;

        /*
         * Prevent race where we're removing the module and we get link update
         * for qed.
         */
        if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Ignore link update, driver getting unload.\n");
                return;
        }

        if (link->link_up) {
                if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
                        QEDF_INFO((&qedf->dbg_ctx), QEDF_LOG_DISC,
                            "Ignoring link up event as link is already up.\n");
                        return;
                }
                QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
                    link->speed / 1000);

                /* Cancel any pending link down work */
                cancel_delayed_work(&qedf->link_update);

                atomic_set(&qedf->link_state, QEDF_LINK_UP);
                qedf_update_link_speed(qedf, link);

                if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE ||
                    qedf_dcbx_no_wait) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                             "DCBx done.\n");
                        if (atomic_read(&qedf->link_down_tmo_valid) > 0)
                                queue_delayed_work(qedf->link_update_wq,
                                    &qedf->link_recovery, 0);
                        else
                                queue_delayed_work(qedf->link_update_wq,
                                    &qedf->link_update, 0);
                        atomic_set(&qedf->link_down_tmo_valid, 0);
                }

        } else {
                QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");

                atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
                atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
                /*
                 * Flag that we're waiting for the link to come back up before
                 * informing the fcoe layer of the event.
                 */
                if (qedf_link_down_tmo > 0) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "Starting link down tmo.\n");
                        atomic_set(&qedf->link_down_tmo_valid, 1);
                }
                qedf->vlan_id = 0;
                qedf_update_link_speed(qedf, link);
                queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
                    qedf_link_down_tmo * HZ);
        }
}


static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
{
        struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
        u8 tmp_prio;

        QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
            "prio=%d.\n", get->operational.valid, get->operational.enabled,
            get->operational.app_prio.fcoe);

        if (get->operational.enabled && get->operational.valid) {
                /* If DCBX was already negotiated on link up then just exit */
                if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "DCBX already set on link up.\n");
                        return;
                }

                atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);

                /*
                 * Set the 8021q priority in the following manner:
                 *
                 * 1. If a modparam is set use that
                 * 2. If the value is not between 0..7 use the default
                 * 3. Use the priority we get from the DCBX app tag
                 */
                tmp_prio = get->operational.app_prio.fcoe;
                if (qedf_default_prio > -1)
                        qedf->prio = qedf_default_prio;
                else if (tmp_prio > 7) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "FIP/FCoE prio %d out of range, setting to %d.\n",
                            tmp_prio, QEDF_DEFAULT_PRIO);
                        qedf->prio = QEDF_DEFAULT_PRIO;
                } else
                        qedf->prio = tmp_prio;

                if (atomic_read(&qedf->link_state) == QEDF_LINK_UP &&
                    !qedf_dcbx_no_wait) {
                        if (atomic_read(&qedf->link_down_tmo_valid) > 0)
                                queue_delayed_work(qedf->link_update_wq,
                                    &qedf->link_recovery, 0);
                        else
                                queue_delayed_work(qedf->link_update_wq,
                                    &qedf->link_update, 0);
                        atomic_set(&qedf->link_down_tmo_valid, 0);
                }
        }

}

static u32 qedf_get_login_failures(void *cookie)
{
        struct qedf_ctx *qedf;

        qedf = (struct qedf_ctx *)cookie;
        return qedf->flogi_failed;
}

static struct qed_fcoe_cb_ops qedf_cb_ops = {
        {
                .link_update = qedf_link_update,
                .bw_update = qedf_bw_update,
                .schedule_recovery_handler = qedf_schedule_recovery_handler,
                .dcbx_aen = qedf_dcbx_handler,
                .get_generic_tlv_data = qedf_get_generic_tlv_data,
                .get_protocol_tlv_data = qedf_get_protocol_tlv_data,
                .schedule_hw_err_handler = qedf_schedule_hw_err_handler,
        }
};

/*
 * Various transport templates.
 */

static struct scsi_transport_template *qedf_fc_transport_template;
static struct scsi_transport_template *qedf_fc_vport_transport_template;

/*
 * SCSI EH handlers
 */
static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
{
        struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
        struct fc_lport *lport;
        struct qedf_ctx *qedf;
        struct qedf_ioreq *io_req;
        struct fc_rport_libfc_priv *rp = rport->dd_data;
        struct fc_rport_priv *rdata;
        struct qedf_rport *fcport = NULL;
        int rc = FAILED;
        int wait_count = 100;
        int refcount = 0;
        int rval;
        int got_ref = 0;

        lport = shost_priv(sc_cmd->device->host);
        qedf = (struct qedf_ctx *)lport_priv(lport);

        /* rport and tgt are allocated together, so tgt should be non-NULL */
        fcport = (struct qedf_rport *)&rp[1];
        rdata = fcport->rdata;
        if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
                QEDF_ERR(&qedf->dbg_ctx, "stale rport, sc_cmd=%p\n", sc_cmd);
                rc = SUCCESS;
                goto out;
        }


        io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
        if (!io_req) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "sc_cmd not queued with lld, sc_cmd=%p op=0x%02x, port_id=%06x\n",
                         sc_cmd, sc_cmd->cmnd[0],
                         rdata->ids.port_id);
                rc = SUCCESS;
                goto drop_rdata_kref;
        }

        rval = kref_get_unless_zero(&io_req->refcount); /* ID: 005 */
        if (rval)
                got_ref = 1;

        /* If we got a valid io_req, confirm it belongs to this sc_cmd. */
        if (!rval || io_req->sc_cmd != sc_cmd) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Freed/Incorrect io_req, io_req->sc_cmd=%p, sc_cmd=%p, port_id=%06x, bailing out.\n",
                         io_req->sc_cmd, sc_cmd, rdata->ids.port_id);

                goto drop_rdata_kref;
        }

        if (fc_remote_port_chkready(rport)) {
                refcount = kref_read(&io_req->refcount);
                QEDF_ERR(&qedf->dbg_ctx,
                         "rport not ready, io_req=%p, xid=0x%x sc_cmd=%p op=0x%02x, refcount=%d, port_id=%06x\n",
                         io_req, io_req->xid, sc_cmd, sc_cmd->cmnd[0],
                         refcount, rdata->ids.port_id);

                goto drop_rdata_kref;
        }

        rc = fc_block_scsi_eh(sc_cmd);
        if (rc)
                goto drop_rdata_kref;

        if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Connection uploading, xid=0x%x., port_id=%06x\n",
                         io_req->xid, rdata->ids.port_id);
                while (io_req->sc_cmd && (wait_count != 0)) {
                        msleep(100);
                        wait_count--;
                }
                if (wait_count) {
                        QEDF_ERR(&qedf->dbg_ctx, "ABTS succeeded\n");
                        rc = SUCCESS;
                } else {
                        QEDF_ERR(&qedf->dbg_ctx, "ABTS failed\n");
                        rc = FAILED;
                }
                goto drop_rdata_kref;
        }

        if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
                QEDF_ERR(&qedf->dbg_ctx, "link not ready.\n");
                goto drop_rdata_kref;
        }

        QEDF_ERR(&qedf->dbg_ctx,
                 "Aborting io_req=%p sc_cmd=%p xid=0x%x fp_idx=%d, port_id=%06x.\n",
                 io_req, sc_cmd, io_req->xid, io_req->fp_idx,
                 rdata->ids.port_id);

        if (qedf->stop_io_on_error) {
                qedf_stop_all_io(qedf);
                rc = SUCCESS;
                goto drop_rdata_kref;
        }

        init_completion(&io_req->abts_done);
        rval = qedf_initiate_abts(io_req, true);
        if (rval) {
                QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
                /*
                 * If we fail to queue the ABTS then return this command to
                 * the SCSI layer as it will own and free the xid
                 */
                rc = SUCCESS;
                qedf_scsi_done(qedf, io_req, DID_ERROR);
                goto drop_rdata_kref;
        }

        wait_for_completion(&io_req->abts_done);

        if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
            io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
            io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
                /*
                 * If we get a reponse to the abort this is success from
                 * the perspective that all references to the command have
                 * been removed from the driver and firmware
                 */
                rc = SUCCESS;
        } else {
                /* If the abort and cleanup failed then return a failure */
                rc = FAILED;
        }

        if (rc == SUCCESS)
                QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
                          io_req->xid);
        else
                QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
                          io_req->xid);

drop_rdata_kref:
        kref_put(&rdata->kref, fc_rport_destroy);
out:
        if (got_ref)
                kref_put(&io_req->refcount, qedf_release_cmd);
        return rc;
}

static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
{
        QEDF_ERR(NULL, "%d:0:%d:%lld: TARGET RESET Issued...",
                 sc_cmd->device->host->host_no, sc_cmd->device->id,
                 sc_cmd->device->lun);
        return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
}

static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
{
        QEDF_ERR(NULL, "%d:0:%d:%lld: LUN RESET Issued... ",
                 sc_cmd->device->host->host_no, sc_cmd->device->id,
                 sc_cmd->device->lun);
        return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
}

bool qedf_wait_for_upload(struct qedf_ctx *qedf)
{
        struct qedf_rport *fcport = NULL;
        int wait_cnt = 120;

        while (wait_cnt--) {
                if (atomic_read(&qedf->num_offloads))
                        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                                  "Waiting for all uploads to complete num_offloads = 0x%x.\n",
                                  atomic_read(&qedf->num_offloads));
                else
                        return true;
                msleep(500);
        }

        rcu_read_lock();
        list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
                if (fcport && test_bit(QEDF_RPORT_SESSION_READY,
                                       &fcport->flags)) {
                        if (fcport->rdata)
                                QEDF_ERR(&qedf->dbg_ctx,
                                         "Waiting for fcport %p portid=%06x.\n",
                                         fcport, fcport->rdata->ids.port_id);
                        } else {
                                QEDF_ERR(&qedf->dbg_ctx,
                                         "Waiting for fcport %p.\n", fcport);
                        }
        }
        rcu_read_unlock();
        return false;

}

/* Performs soft reset of qedf_ctx by simulating a link down/up */
void qedf_ctx_soft_reset(struct fc_lport *lport)
{
        struct qedf_ctx *qedf;
        struct qed_link_output if_link;

        if (lport->vport) {
                QEDF_ERR(NULL, "Cannot issue host reset on NPIV port.\n");
                return;
        }

        qedf = lport_priv(lport);

        qedf->flogi_pending = 0;
        /* For host reset, essentially do a soft link up/down */
        atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                  "Queuing link down work.\n");
        queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
            0);

        if (qedf_wait_for_upload(qedf) == false) {
                QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
                WARN_ON(atomic_read(&qedf->num_offloads));
        }

        /* Before setting link up query physical link state */
        qed_ops->common->get_link(qedf->cdev, &if_link);
        /* Bail if the physical link is not up */
        if (!if_link.link_up) {
                QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                          "Physical link is not up.\n");
                return;
        }
        /* Flush and wait to make sure link down is processed */
        flush_delayed_work(&qedf->link_update);
        msleep(500);

        atomic_set(&qedf->link_state, QEDF_LINK_UP);
        qedf->vlan_id  = 0;
        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                  "Queue link up work.\n");
        queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
            0);
}

/* Reset the host by gracefully logging out and then logging back in */
static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
{
        struct fc_lport *lport;
        struct qedf_ctx *qedf;

        lport = shost_priv(sc_cmd->device->host);
        qedf = lport_priv(lport);

        if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
            test_bit(QEDF_UNLOADING, &qedf->flags))
                return FAILED;

        QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");

        qedf_ctx_soft_reset(lport);

        return SUCCESS;
}

static int qedf_slave_configure(struct scsi_device *sdev)
{
        if (qedf_queue_depth) {
                scsi_change_queue_depth(sdev, qedf_queue_depth);
        }

        return 0;
}

static struct scsi_host_template qedf_host_template = {
        .module         = THIS_MODULE,
        .name           = QEDF_MODULE_NAME,
        .this_id        = -1,
        .cmd_per_lun    = 32,
        .max_sectors    = 0xffff,
        .queuecommand   = qedf_queuecommand,
        .shost_attrs    = qedf_host_attrs,
        .eh_abort_handler       = qedf_eh_abort,
        .eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
        .eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
        .eh_host_reset_handler  = qedf_eh_host_reset,
        .slave_configure        = qedf_slave_configure,
        .dma_boundary = QED_HW_DMA_BOUNDARY,
        .sg_tablesize = QEDF_MAX_BDS_PER_CMD,
        .can_queue = FCOE_PARAMS_NUM_TASKS,
        .change_queue_depth = scsi_change_queue_depth,
};

static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
{
        int rc;

        spin_lock(&qedf_global_lock);
        rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
        spin_unlock(&qedf_global_lock);

        return rc;
}

static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
{
        struct qedf_rport *fcport;
        struct fc_rport_priv *rdata;

        rcu_read_lock();
        list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
                rdata = fcport->rdata;
                if (rdata == NULL)
                        continue;
                if (rdata->ids.port_id == port_id) {
                        rcu_read_unlock();
                        return fcport;
                }
        }
        rcu_read_unlock();

        /* Return NULL to caller to let them know fcport was not found */
        return NULL;
}

/* Transmits an ELS frame over an offloaded session */
static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
{
        struct fc_frame_header *fh;
        int rc = 0;

        fh = fc_frame_header_get(fp);
        if ((fh->fh_type == FC_TYPE_ELS) &&
            (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
                switch (fc_frame_payload_op(fp)) {
                case ELS_ADISC:
                        qedf_send_adisc(fcport, fp);
                        rc = 1;
                        break;
                }
        }

        return rc;
}

/*
 * qedf_xmit - qedf FCoE frame transmit function
 */
static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
{
        struct fc_lport         *base_lport;
        struct qedf_ctx         *qedf;
        struct ethhdr           *eh;
        struct fcoe_crc_eof     *cp;
        struct sk_buff          *skb;
        struct fc_frame_header  *fh;
        struct fcoe_hdr         *hp;
        u8                      sof, eof;
        u32                     crc;
        unsigned int            hlen, tlen, elen;
        int                     wlen;
        struct fc_stats         *stats;
        struct fc_lport *tmp_lport;
        struct fc_lport *vn_port = NULL;
        struct qedf_rport *fcport;
        int rc;
        u16 vlan_tci = 0;

        qedf = (struct qedf_ctx *)lport_priv(lport);

        fh = fc_frame_header_get(fp);
        skb = fp_skb(fp);

        /* Filter out traffic to other NPIV ports on the same host */
        if (lport->vport)
                base_lport = shost_priv(vport_to_shost(lport->vport));
        else
                base_lport = lport;

        /* Flag if the destination is the base port */
        if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
                vn_port = base_lport;
        } else {
                /* Got through the list of vports attached to the base_lport
                 * and see if we have a match with the destination address.
                 */
                list_for_each_entry(tmp_lport, &base_lport->vports, list) {
                        if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
                                vn_port = tmp_lport;
                                break;
                        }
                }
        }
        if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
                struct fc_rport_priv *rdata = NULL;

                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
                    "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
                kfree_skb(skb);
                rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
                if (rdata) {
                        rdata->retries = lport->max_rport_retry_count;
                        kref_put(&rdata->kref, fc_rport_destroy);
                }
                return -EINVAL;
        }
        /* End NPIV filtering */

        if (!qedf->ctlr.sel_fcf) {
                kfree_skb(skb);
                return 0;
        }

        if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
                QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
                kfree_skb(skb);
                return 0;
        }

        if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
                QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
                kfree_skb(skb);
                return 0;
        }

        if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
                if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
                        return 0;
        }

        /* Check to see if this needs to be sent on an offloaded session */
        fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));

        if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
                rc = qedf_xmit_l2_frame(fcport, fp);
                /*
                 * If the frame was successfully sent over the middle path
                 * then do not try to also send it over the LL2 path
                 */
                if (rc)
                        return 0;
        }

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

        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 (qedf_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);

        /*
         * Add VLAN tag to non-offload FCoE frame based on current stored VLAN
         * for FIP/FCoE traffic.
         */
        __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);

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

        /* Set the source MAC address */
        ether_addr_copy(eh->h_source, qedf->data_src_addr);

        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;

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

        /* Get VLAN ID from skb for printing purposes */
        __vlan_hwaccel_get_tag(skb, &vlan_tci);

        /* send down to lld */
        fr_dev(fp) = lport;
        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
            "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
            ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
            vlan_tci);
        if (qedf_dump_frames)
                print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
                    1, skb->data, skb->len, false);
        rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, 0);
        if (rc) {
                QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
                kfree_skb(skb);
                return rc;
        }

        return 0;
}

static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
{
        int rval = 0;
        u32 *pbl;
        dma_addr_t page;
        int num_pages;

        /* Calculate appropriate queue and PBL sizes */
        fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
        fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
        fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
            sizeof(void *);
        fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;

        fcport->sq = dma_alloc_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
                                        &fcport->sq_dma, GFP_KERNEL);
        if (!fcport->sq) {
                QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue.\n");
                rval = 1;
                goto out;
        }

        fcport->sq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
                                            fcport->sq_pbl_size,
                                            &fcport->sq_pbl_dma, GFP_KERNEL);
        if (!fcport->sq_pbl) {
                QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue PBL.\n");
                rval = 1;
                goto out_free_sq;
        }

        /* Create PBL */
        num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
        page = fcport->sq_dma;
        pbl = (u32 *)fcport->sq_pbl;

        while (num_pages--) {
                *pbl = U64_LO(page);
                pbl++;
                *pbl = U64_HI(page);
                pbl++;
                page += QEDF_PAGE_SIZE;
        }

        return rval;

out_free_sq:
        dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
            fcport->sq_dma);
out:
        return rval;
}

static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
{
        if (fcport->sq_pbl)
                dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
                    fcport->sq_pbl, fcport->sq_pbl_dma);
        if (fcport->sq)
                dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
                    fcport->sq, fcport->sq_dma);
}

static int qedf_offload_connection(struct qedf_ctx *qedf,
        struct qedf_rport *fcport)
{
        struct qed_fcoe_params_offload conn_info;
        u32 port_id;
        int rval;
        uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
                   "portid=%06x.\n", fcport->rdata->ids.port_id);
        rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
            &fcport->fw_cid, &fcport->p_doorbell);
        if (rval) {
                QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
                           "for portid=%06x.\n", fcport->rdata->ids.port_id);
                rval = 1; /* For some reason qed returns 0 on failure here */
                goto out;
        }

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
                   "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
                   fcport->fw_cid, fcport->handle);

        memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));

        /* Fill in the offload connection info */
        conn_info.sq_pbl_addr = fcport->sq_pbl_dma;

        conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
        conn_info.sq_next_page_addr =
            (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));

        /* Need to use our FCoE MAC for the offload session */
        ether_addr_copy(conn_info.src_mac, qedf->data_src_addr);

        ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);

        conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
        conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov;
        conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
        conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;

        /* Set VLAN data */
        conn_info.vlan_tag = qedf->vlan_id <<
            FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
        conn_info.vlan_tag |=
            qedf->prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
        conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
            FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);

        /* Set host port source id */
        port_id = fc_host_port_id(qedf->lport->host);
        fcport->sid = port_id;
        conn_info.s_id.addr_hi = (port_id & 0x000000FF);
        conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
        conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;

        conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;

        /* Set remote port destination id */
        port_id = fcport->rdata->rport->port_id;
        conn_info.d_id.addr_hi = (port_id & 0x000000FF);
        conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
        conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;

        conn_info.def_q_idx = 0; /* Default index for send queue? */

        /* Set FC-TAPE specific flags if needed */
        if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
                    "Enable CONF, REC for portid=%06x.\n",
                    fcport->rdata->ids.port_id);
                conn_info.flags |= 1 <<
                    FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
                conn_info.flags |=
                    ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
                    FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
        }

        rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
        if (rval) {
                QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
                           "for portid=%06x.\n", fcport->rdata->ids.port_id);
                goto out_free_conn;
        } else
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
                           "succeeded portid=%06x total_sqe=%d.\n",
                           fcport->rdata->ids.port_id, total_sqe);

        spin_lock_init(&fcport->rport_lock);
        atomic_set(&fcport->free_sqes, total_sqe);
        return 0;
out_free_conn:
        qed_ops->release_conn(qedf->cdev, fcport->handle);
out:
        return rval;
}

#define QEDF_TERM_BUFF_SIZE             10
static void qedf_upload_connection(struct qedf_ctx *qedf,
        struct qedf_rport *fcport)
{
        void *term_params;
        dma_addr_t term_params_dma;

        /* Term params needs to be a DMA coherent buffer as qed shared the
         * physical DMA address with the firmware. The buffer may be used in
         * the receive path so we may eventually have to move this.
         */
        term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
                &term_params_dma, GFP_KERNEL);

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
                   "port_id=%06x.\n", fcport->rdata->ids.port_id);

        qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
        qed_ops->release_conn(qedf->cdev, fcport->handle);

        dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
            term_params_dma);
}

static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
        struct qedf_rport *fcport)
{
        struct fc_rport_priv *rdata = fcport->rdata;

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
            fcport->rdata->ids.port_id);

        /* Flush any remaining i/o's before we upload the connection */
        qedf_flush_active_ios(fcport, -1);

        if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
                qedf_upload_connection(qedf, fcport);
        qedf_free_sq(qedf, fcport);
        fcport->rdata = NULL;
        fcport->qedf = NULL;
        kref_put(&rdata->kref, fc_rport_destroy);
}

/*
 * This event_callback is called after successful completion of libfc
 * initiated target login. qedf can proceed with initiating the session
 * establishment.
 */
static void qedf_rport_event_handler(struct fc_lport *lport,
                                struct fc_rport_priv *rdata,
                                enum fc_rport_event event)
{
        struct qedf_ctx *qedf = lport_priv(lport);
        struct fc_rport *rport = rdata->rport;
        struct fc_rport_libfc_priv *rp;
        struct qedf_rport *fcport;
        u32 port_id;
        int rval;
        unsigned long flags;

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
                   "port_id = 0x%x\n", event, rdata->ids.port_id);

        switch (event) {
        case RPORT_EV_READY:
                if (!rport) {
                        QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
                        break;
                }

                rp = rport->dd_data;
                fcport = (struct qedf_rport *)&rp[1];
                fcport->qedf = qedf;

                if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
                        QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
                            "portid=0x%x as max number of offloaded sessions "
                            "reached.\n", rdata->ids.port_id);
                        return;
                }

                /*
                 * Don't try to offload the session again. Can happen when we
                 * get an ADISC
                 */
                if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
                        QEDF_WARN(&(qedf->dbg_ctx), "Session already "
                                   "offloaded, portid=0x%x.\n",
                                   rdata->ids.port_id);
                        return;
                }

                if (rport->port_id == FC_FID_DIR_SERV) {
                        /*
                         * qedf_rport structure doesn't exist for
                         * directory server.
                         * We should not come here, as lport will
                         * take care of fabric login
                         */
                        QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
                            "exist for dir server port_id=%x\n",
                            rdata->ids.port_id);
                        break;
                }

                if (rdata->spp_type != FC_TYPE_FCP) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "Not offloading since spp type isn't FCP\n");
                        break;
                }
                if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "Not FCP target so not offloading\n");
                        break;
                }

                /* Initial reference held on entry, so this can't fail */
                kref_get(&rdata->kref);
                fcport->rdata = rdata;
                fcport->rport = rport;

                rval = qedf_alloc_sq(qedf, fcport);
                if (rval) {
                        qedf_cleanup_fcport(qedf, fcport);
                        break;
                }

                /* Set device type */
                if (rdata->flags & FC_RP_FLAGS_RETRY &&
                    rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
                    !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
                        fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "portid=%06x is a TAPE device.\n",
                            rdata->ids.port_id);
                } else {
                        fcport->dev_type = QEDF_RPORT_TYPE_DISK;
                }

                rval = qedf_offload_connection(qedf, fcport);
                if (rval) {
                        qedf_cleanup_fcport(qedf, fcport);
                        break;
                }

                /* Add fcport to list of qedf_ctx list of offloaded ports */
                spin_lock_irqsave(&qedf->hba_lock, flags);
                list_add_rcu(&fcport->peers, &qedf->fcports);
                spin_unlock_irqrestore(&qedf->hba_lock, flags);

                /*
                 * Set the session ready bit to let everyone know that this
                 * connection is ready for I/O
                 */
                set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
                atomic_inc(&qedf->num_offloads);

                break;
        case RPORT_EV_LOGO:
        case RPORT_EV_FAILED:
        case RPORT_EV_STOP:
                port_id = rdata->ids.port_id;
                if (port_id == FC_FID_DIR_SERV)
                        break;

                if (rdata->spp_type != FC_TYPE_FCP) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "No action since spp type isn't FCP\n");
                        break;
                }
                if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "Not FCP target so no action\n");
                        break;
                }

                if (!rport) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                            "port_id=%x - rport notcreated Yet!!\n", port_id);
                        break;
                }
                rp = rport->dd_data;
                /*
                 * Perform session upload. Note that rdata->peers is already
                 * removed from disc->rports list before we get this event.
                 */
                fcport = (struct qedf_rport *)&rp[1];

                spin_lock_irqsave(&fcport->rport_lock, flags);
                /* Only free this fcport if it is offloaded already */
                if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) &&
                    !test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
                    &fcport->flags)) {
                        set_bit(QEDF_RPORT_UPLOADING_CONNECTION,
                                &fcport->flags);
                        spin_unlock_irqrestore(&fcport->rport_lock, flags);
                        qedf_cleanup_fcport(qedf, fcport);
                        /*
                         * Remove fcport to list of qedf_ctx list of offloaded
                         * ports
                         */
                        spin_lock_irqsave(&qedf->hba_lock, flags);
                        list_del_rcu(&fcport->peers);
                        spin_unlock_irqrestore(&qedf->hba_lock, flags);

                        clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
                            &fcport->flags);
                        atomic_dec(&qedf->num_offloads);
                } else {
                        spin_unlock_irqrestore(&fcport->rport_lock, flags);
                }
                break;

        case RPORT_EV_NONE:
                break;
        }
}

static void qedf_abort_io(struct fc_lport *lport)
{
        /* NO-OP but need to fill in the template */
}

static void qedf_fcp_cleanup(struct fc_lport *lport)
{
        /*
         * NO-OP but need to fill in template to prevent a NULL
         * function pointer dereference during link down. I/Os
         * will be flushed when port is uploaded.
         */
}

static struct libfc_function_template qedf_lport_template = {
        .frame_send             = qedf_xmit,
        .fcp_abort_io           = qedf_abort_io,
        .fcp_cleanup            = qedf_fcp_cleanup,
        .rport_event_callback   = qedf_rport_event_handler,
        .elsct_send             = qedf_elsct_send,
};

static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
{
        fcoe_ctlr_init(&qedf->ctlr, FIP_MODE_AUTO);

        qedf->ctlr.send = qedf_fip_send;
        qedf->ctlr.get_src_addr = qedf_get_src_mac;
        ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
}

static void qedf_setup_fdmi(struct qedf_ctx *qedf)
{
        struct fc_lport *lport = qedf->lport;
        u8 buf[8];
        int pos;
        uint32_t i;

        /*
         * fdmi_enabled needs to be set for libfc
         * to execute FDMI registration
         */
        lport->fdmi_enabled = 1;

        /*
         * Setup the necessary fc_host attributes to that will be used to fill
         * in the FDMI information.
         */

        /* Get the PCI-e Device Serial Number Capability */
        pos = pci_find_ext_capability(qedf->pdev, PCI_EXT_CAP_ID_DSN);
        if (pos) {
                pos += 4;
                for (i = 0; i < 8; i++)
                        pci_read_config_byte(qedf->pdev, pos + i, &buf[i]);

                snprintf(fc_host_serial_number(lport->host),
                    FC_SERIAL_NUMBER_SIZE,
                    "%02X%02X%02X%02X%02X%02X%02X%02X",
                    buf[7], buf[6], buf[5], buf[4],
                    buf[3], buf[2], buf[1], buf[0]);
        } else
                snprintf(fc_host_serial_number(lport->host),
                    FC_SERIAL_NUMBER_SIZE, "Unknown");

        snprintf(fc_host_manufacturer(lport->host),
            FC_SERIAL_NUMBER_SIZE, "%s", "Marvell Semiconductor Inc.");

        if (qedf->pdev->device == QL45xxx) {
                snprintf(fc_host_model(lport->host),
                        FC_SYMBOLIC_NAME_SIZE, "%s", "QL45xxx");

                snprintf(fc_host_model_description(lport->host),
                        FC_SYMBOLIC_NAME_SIZE, "%s",
                        "Marvell FastLinQ QL45xxx FCoE Adapter");
        }

        if (qedf->pdev->device == QL41xxx) {
                snprintf(fc_host_model(lport->host),
                        FC_SYMBOLIC_NAME_SIZE, "%s", "QL41xxx");

                snprintf(fc_host_model_description(lport->host),
                        FC_SYMBOLIC_NAME_SIZE, "%s",
                        "Marvell FastLinQ QL41xxx FCoE Adapter");
        }

        snprintf(fc_host_hardware_version(lport->host),
            FC_VERSION_STRING_SIZE, "Rev %d", qedf->pdev->revision);

        snprintf(fc_host_driver_version(lport->host),
            FC_VERSION_STRING_SIZE, "%s", QEDF_VERSION);

        snprintf(fc_host_firmware_version(lport->host),
            FC_VERSION_STRING_SIZE, "%d.%d.%d.%d",
            FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
            FW_ENGINEERING_VERSION);

        snprintf(fc_host_vendor_identifier(lport->host),
                FC_VENDOR_IDENTIFIER, "%s", "Marvell");

}

static int qedf_lport_setup(struct qedf_ctx *qedf)
{
        struct fc_lport *lport = qedf->lport;

        lport->link_up = 0;
        lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
        lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
        lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
            FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
        lport->boot_time = jiffies;
        lport->e_d_tov = 2 * 1000;
        lport->r_a_tov = 10 * 1000;

        /* Set NPIV support */
        lport->does_npiv = 1;
        fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;

        fc_set_wwnn(lport, qedf->wwnn);
        fc_set_wwpn(lport, qedf->wwpn);

        if (fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0)) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "fcoe_libfc_config failed.\n");
                return -ENOMEM;
        }

        /* Allocate the exchange manager */
        fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_PARAMS_NUM_TASKS,
                          0xfffe, NULL);

        if (fc_lport_init_stats(lport))
                return -ENOMEM;

        /* Finish lport config */
        fc_lport_config(lport);

        /* Set max frame size */
        fc_set_mfs(lport, QEDF_MFS);
        fc_host_maxframe_size(lport->host) = lport->mfs;

        /* Set default dev_loss_tmo based on module parameter */
        fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;

        /* Set symbolic node name */
        if (qedf->pdev->device == QL45xxx)
                snprintf(fc_host_symbolic_name(lport->host), 256,
                        "Marvell FastLinQ 45xxx FCoE v%s", QEDF_VERSION);

        if (qedf->pdev->device == QL41xxx)
                snprintf(fc_host_symbolic_name(lport->host), 256,
                        "Marvell FastLinQ 41xxx FCoE v%s", QEDF_VERSION);

        qedf_setup_fdmi(qedf);

        return 0;
}

/*
 * NPIV functions
 */

static int qedf_vport_libfc_config(struct fc_vport *vport,
        struct fc_lport *lport)
{
        lport->link_up = 0;
        lport->qfull = 0;
        lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
        lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
        lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
            FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
        lport->boot_time = jiffies;
        lport->e_d_tov = 2 * 1000;
        lport->r_a_tov = 10 * 1000;
        lport->does_npiv = 1; /* Temporary until we add NPIV support */

        /* Allocate stats for vport */
        if (fc_lport_init_stats(lport))
                return -ENOMEM;

        /* Finish lport config */
        fc_lport_config(lport);

        /* offload related configuration */
        lport->crc_offload = 0;
        lport->seq_offload = 0;
        lport->lro_enabled = 0;
        lport->lro_xid = 0;
        lport->lso_max = 0;

        return 0;
}

static int qedf_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 fc_lport *vn_port;
        struct qedf_ctx *base_qedf = lport_priv(n_port);
        struct qedf_ctx *vport_qedf;

        char buf[32];
        int rc = 0;

        rc = fcoe_validate_vport_create(vport);
        if (rc) {
                fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
                QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
                           "WWPN (0x%s) already exists.\n", buf);
                return rc;
        }

        if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
                QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
                           "because link is not up.\n");
                return -EIO;
        }

        vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
        if (!vn_port) {
                QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
                           "for vport.\n");
                return -ENOMEM;
        }

        fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
        QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
            buf);

        /* Copy some fields from base_qedf */
        vport_qedf = lport_priv(vn_port);
        memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));

        /* Set qedf data specific to this vport */
        vport_qedf->lport = vn_port;
        /* Use same hba_lock as base_qedf */
        vport_qedf->hba_lock = base_qedf->hba_lock;
        vport_qedf->pdev = base_qedf->pdev;
        vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
        init_completion(&vport_qedf->flogi_compl);
        INIT_LIST_HEAD(&vport_qedf->fcports);

        rc = qedf_vport_libfc_config(vport, vn_port);
        if (rc) {
                QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
                    "for lport stats.\n");
                goto err;
        }

        fc_set_wwnn(vn_port, vport->node_name);
        fc_set_wwpn(vn_port, vport->port_name);
        vport_qedf->wwnn = vn_port->wwnn;
        vport_qedf->wwpn = vn_port->wwpn;

        vn_port->host->transportt = qedf_fc_vport_transport_template;
        vn_port->host->can_queue = FCOE_PARAMS_NUM_TASKS;
        vn_port->host->max_lun = qedf_max_lun;
        vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
        vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
        vn_port->host->max_id = QEDF_MAX_SESSIONS;

        rc = scsi_add_host(vn_port->host, &vport->dev);
        if (rc) {
                QEDF_WARN(&base_qedf->dbg_ctx,
                          "Error adding Scsi_Host rc=0x%x.\n", rc);
                goto err;
        }

        /* Set default dev_loss_tmo based on module parameter */
        fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;

        /* Init libfc stuffs */
        memcpy(&vn_port->tt, &qedf_lport_template,
                sizeof(qedf_lport_template));
        fc_exch_init(vn_port);
        fc_elsct_init(vn_port);
        fc_lport_init(vn_port);
        fc_disc_init(vn_port);
        fc_disc_config(vn_port, vn_port);


        /* Allocate the exchange manager */
        shost = vport_to_shost(vport);
        n_port = shost_priv(shost);
        fc_exch_mgr_list_clone(n_port, vn_port);

        /* Set max frame size */
        fc_set_mfs(vn_port, QEDF_MFS);

        fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;

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

        QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
                   vn_port);

        /* Set up debug context for vport */
        vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
        vport_qedf->dbg_ctx.pdev = base_qedf->pdev;

        return 0;

err:
        scsi_host_put(vn_port->host);
        return rc;
}

static int qedf_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 qedf_ctx *qedf = lport_priv(vn_port);

        if (!qedf) {
                QEDF_ERR(NULL, "qedf is NULL.\n");
                goto out;
        }

        /* Set unloading bit on vport qedf_ctx to prevent more I/O */
        set_bit(QEDF_UNLOADING, &qedf->flags);

        mutex_lock(&n_port->lp_mutex);
        list_del(&vn_port->list);
        mutex_unlock(&n_port->lp_mutex);

        fc_fabric_logoff(vn_port);
        fc_lport_destroy(vn_port);

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

        /*
         * Only try to release the exchange manager if the vn_port
         * configuration is complete.
         */
        if (vn_port->state == LPORT_ST_READY)
                fc_exch_mgr_free(vn_port);

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

        /* Release Scsi_Host */
        scsi_host_put(vn_port->host);

out:
        return 0;
}

static int qedf_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;
}

/*
 * During removal we need to wait for all the vports associated with a port
 * to be destroyed so we avoid a race condition where libfc is still trying
 * to reap vports while the driver remove function has already reaped the
 * driver contexts associated with the physical port.
 */

static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
{
        struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
            "Entered.\n");
        while (fc_host->npiv_vports_inuse > 0) {
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
                    "Waiting for all vports to be reaped.\n");
                msleep(1000);
        }
}

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

        qedf_ctx_soft_reset(lport);
        return 0;
}

static void qedf_get_host_port_id(struct Scsi_Host *shost)
{
        struct fc_lport *lport = shost_priv(shost);

        fc_host_port_id(shost) = lport->port_id;
}

static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
        *shost)
{
        struct fc_host_statistics *qedf_stats;
        struct fc_lport *lport = shost_priv(shost);
        struct qedf_ctx *qedf = lport_priv(lport);
        struct qed_fcoe_stats *fw_fcoe_stats;

        qedf_stats = fc_get_host_stats(shost);

        /* We don't collect offload stats for specific NPIV ports */
        if (lport->vport)
                goto out;

        fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
        if (!fw_fcoe_stats) {
                QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
                    "fw_fcoe_stats.\n");
                goto out;
        }

        mutex_lock(&qedf->stats_mutex);

        /* Query firmware for offload stats */
        qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);

        /*
         * The expectation is that we add our offload stats to the stats
         * being maintained by libfc each time the fc_get_host_status callback
         * is invoked. The additions are not carried over for each call to
         * the fc_get_host_stats callback.
         */
        qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
            fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
            fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
        qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
            fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
            fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
        qedf_stats->fcp_input_megabytes +=
            do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
        qedf_stats->fcp_output_megabytes +=
            do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
        qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
        qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
        qedf_stats->invalid_crc_count +=
            fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
        qedf_stats->dumped_frames =
            fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
        qedf_stats->error_frames +=
            fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
        qedf_stats->fcp_input_requests += qedf->input_requests;
        qedf_stats->fcp_output_requests += qedf->output_requests;
        qedf_stats->fcp_control_requests += qedf->control_requests;
        qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
        qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;

        mutex_unlock(&qedf->stats_mutex);
        kfree(fw_fcoe_stats);
out:
        return qedf_stats;
}

static struct fc_function_template qedf_fc_transport_fn = {
        .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,

        .get_host_port_id = qedf_get_host_port_id,
        .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,

        /*
         * Tell FC transport to allocate enough space to store the backpointer
         * for the associate qedf_rport struct.
         */
        .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
                                sizeof(struct qedf_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 = qedf_fc_get_host_stats,
        .issue_fc_host_lip = qedf_fcoe_reset,
        .vport_create = qedf_vport_create,
        .vport_delete = qedf_vport_destroy,
        .vport_disable = qedf_vport_disable,
        .bsg_request = fc_lport_bsg_request,
};

static struct fc_function_template qedf_fc_vport_transport_fn = {
        .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 qedf_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 = qedf_fcoe_reset,
        .bsg_request = fc_lport_bsg_request,
};

static bool qedf_fp_has_work(struct qedf_fastpath *fp)
{
        struct qedf_ctx *qedf = fp->qedf;
        struct global_queue *que;
        struct qed_sb_info *sb_info = fp->sb_info;
        struct status_block_e4 *sb = sb_info->sb_virt;
        u16 prod_idx;

        /* Get the pointer to the global CQ this completion is on */
        que = qedf->global_queues[fp->sb_id];

        /* Be sure all responses have been written to PI */
        rmb();

        /* Get the current firmware producer index */
        prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];

        return (que->cq_prod_idx != prod_idx);
}

/*
 * Interrupt handler code.
 */

/* Process completion queue and copy CQE contents for deferred processesing
 *
 * Return true if we should wake the I/O thread, false if not.
 */
static bool qedf_process_completions(struct qedf_fastpath *fp)
{
        struct qedf_ctx *qedf = fp->qedf;
        struct qed_sb_info *sb_info = fp->sb_info;
        struct status_block_e4 *sb = sb_info->sb_virt;
        struct global_queue *que;
        u16 prod_idx;
        struct fcoe_cqe *cqe;
        struct qedf_io_work *io_work;
        int num_handled = 0;
        unsigned int cpu;
        struct qedf_ioreq *io_req = NULL;
        u16 xid;
        u16 new_cqes;
        u32 comp_type;

        /* Get the current firmware producer index */
        prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];

        /* Get the pointer to the global CQ this completion is on */
        que = qedf->global_queues[fp->sb_id];

        /* Calculate the amount of new elements since last processing */
        new_cqes = (prod_idx >= que->cq_prod_idx) ?
            (prod_idx - que->cq_prod_idx) :
            0x10000 - que->cq_prod_idx + prod_idx;

        /* Save producer index */
        que->cq_prod_idx = prod_idx;

        while (new_cqes) {
                fp->completions++;
                num_handled++;
                cqe = &que->cq[que->cq_cons_idx];

                comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
                    FCOE_CQE_CQE_TYPE_MASK;

                /*
                 * Process unsolicited CQEs directly in the interrupt handler
                 * sine we need the fastpath ID
                 */
                if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
                           "Unsolicated CQE.\n");
                        qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
                        /*
                         * Don't add a work list item.  Increment consumer
                         * consumer index and move on.
                         */
                        goto inc_idx;
                }

                xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
                io_req = &qedf->cmd_mgr->cmds[xid];

                /*
                 * Figure out which percpu thread we should queue this I/O
                 * on.
                 */
                if (!io_req)
                        /* If there is not io_req assocated with this CQE
                         * just queue it on CPU 0
                         */
                        cpu = 0;
                else {
                        cpu = io_req->cpu;
                        io_req->int_cpu = smp_processor_id();
                }

                io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
                if (!io_work) {
                        QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
                                   "work for I/O completion.\n");
                        continue;
                }
                memset(io_work, 0, sizeof(struct qedf_io_work));

                INIT_WORK(&io_work->work, qedf_fp_io_handler);

                /* Copy contents of CQE for deferred processing */
                memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));

                io_work->qedf = fp->qedf;
                io_work->fp = NULL; /* Only used for unsolicited frames */

                queue_work_on(cpu, qedf_io_wq, &io_work->work);

inc_idx:
                que->cq_cons_idx++;
                if (que->cq_cons_idx == fp->cq_num_entries)
                        que->cq_cons_idx = 0;
                new_cqes--;
        }

        return true;
}


/* MSI-X fastpath handler code */
static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
{
        struct qedf_fastpath *fp = dev_id;

        if (!fp) {
                QEDF_ERR(NULL, "fp is null.\n");
                return IRQ_HANDLED;
        }
        if (!fp->sb_info) {
                QEDF_ERR(NULL, "fp->sb_info in null.");
                return IRQ_HANDLED;
        }

        /*
         * Disable interrupts for this status block while we process new
         * completions
         */
        qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);

        while (1) {
                qedf_process_completions(fp);

                if (qedf_fp_has_work(fp) == 0) {
                        /* Update the sb information */
                        qed_sb_update_sb_idx(fp->sb_info);

                        /* Check for more work */
                        rmb();

                        if (qedf_fp_has_work(fp) == 0) {
                                /* Re-enable interrupts */
                                qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
                                return IRQ_HANDLED;
                        }
                }
        }

        /* Do we ever want to break out of above loop? */
        return IRQ_HANDLED;
}

/* simd handler for MSI/INTa */
static void qedf_simd_int_handler(void *cookie)
{
        /* Cookie is qedf_ctx struct */
        struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;

        QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
}

#define QEDF_SIMD_HANDLER_NUM           0
static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
{
        int i;
        u16 vector_idx = 0;
        u32 vector;

        if (qedf->int_info.msix_cnt) {
                for (i = 0; i < qedf->int_info.used_cnt; i++) {
                        vector_idx = i * qedf->dev_info.common.num_hwfns +
                                qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
                        QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                                  "Freeing IRQ #%d vector_idx=%d.\n",
                                  i, vector_idx);
                        vector = qedf->int_info.msix[vector_idx].vector;
                        synchronize_irq(vector);
                        irq_set_affinity_hint(vector, NULL);
                        irq_set_affinity_notifier(vector, NULL);
                        free_irq(vector, &qedf->fp_array[i]);
                }
        } else
                qed_ops->common->simd_handler_clean(qedf->cdev,
                    QEDF_SIMD_HANDLER_NUM);

        qedf->int_info.used_cnt = 0;
        qed_ops->common->set_fp_int(qedf->cdev, 0);
}

static int qedf_request_msix_irq(struct qedf_ctx *qedf)
{
        int i, rc, cpu;
        u16 vector_idx = 0;
        u32 vector;

        cpu = cpumask_first(cpu_online_mask);
        for (i = 0; i < qedf->num_queues; i++) {
                vector_idx = i * qedf->dev_info.common.num_hwfns +
                        qed_ops->common->get_affin_hwfn_idx(qedf->cdev);
                QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
                          "Requesting IRQ #%d vector_idx=%d.\n",
                          i, vector_idx);
                vector = qedf->int_info.msix[vector_idx].vector;
                rc = request_irq(vector, qedf_msix_handler, 0, "qedf",
                                 &qedf->fp_array[i]);

                if (rc) {
                        QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
                        qedf_sync_free_irqs(qedf);
                        return rc;
                }

                qedf->int_info.used_cnt++;
                rc = irq_set_affinity_hint(vector, get_cpu_mask(cpu));
                cpu = cpumask_next(cpu, cpu_online_mask);
        }

        return 0;
}

static int qedf_setup_int(struct qedf_ctx *qedf)
{
        int rc = 0;

        /*
         * Learn interrupt configuration
         */
        rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
        if (rc <= 0)
                return 0;

        rc  = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
        if (rc)
                return 0;

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
                   "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
                   num_online_cpus());

        if (qedf->int_info.msix_cnt)
                return qedf_request_msix_irq(qedf);

        qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
            QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
        qedf->int_info.used_cnt = 1;

        QEDF_ERR(&qedf->dbg_ctx,
                 "Cannot load driver due to a lack of MSI-X vectors.\n");
        return -EINVAL;
}

/* Main function for libfc frame reception */
static void qedf_recv_frame(struct qedf_ctx *qedf,
        struct sk_buff *skb)
{
        u32 fr_len;
        struct fc_lport *lport;
        struct fc_frame_header *fh;
        struct fcoe_crc_eof crc_eof;
        struct fc_frame *fp;
        u8 *mac = NULL;
        u8 *dest_mac = NULL;
        struct fcoe_hdr *hp;
        struct qedf_rport *fcport;
        struct fc_lport *vn_port;
        u32 f_ctl;

        lport = qedf->lport;
        if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
                QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\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->data;
        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))) {
                QEDF_INFO(NULL, QEDF_LOG_LL2, "skb_copy_bits failed.\n");
                kfree_skb(skb);
                return;
        }
        fr_eof(fp) = crc_eof.fcoe_eof;
        fr_crc(fp) = crc_eof.fcoe_crc32;
        if (pskb_trim(skb, fr_len)) {
                QEDF_INFO(NULL, QEDF_LOG_LL2, "pskb_trim failed.\n");
                kfree_skb(skb);
                return;
        }

        fh = fc_frame_header_get(fp);

        /*
         * Invalid frame filters.
         */

        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 (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
                    "FC frame d_id mismatch with MAC %pM.\n", dest_mac);
                kfree_skb(skb);
                return;
        }

        if (qedf->ctlr.state) {
                if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
                        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
                            "Wrong source address: mac:%pM dest_addr:%pM.\n",
                            mac, qedf->ctlr.dest_addr);
                        kfree_skb(skb);
                        return;
                }
        }

        vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));

        /*
         * 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) {
                QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
                          "Dropping frame due to destination mismatch: lport->port_id=0x%x fh->d_id=0x%x.\n",
                          lport->port_id, ntoh24(fh->fh_d_id));
                kfree_skb(skb);
                return;
        }

        f_ctl = ntoh24(fh->fh_f_ctl);
        if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
            (f_ctl & FC_FC_EX_CTX)) {
                /* Drop incoming ABTS response that has both SEQ/EX CTX set */
                QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
                          "Dropping ABTS response as both SEQ/EX CTX set.\n");
                kfree_skb(skb);
                return;
        }

        /*
         * If a connection is uploading, drop incoming FCoE frames as there
         * is a small window where we could try to return a frame while libfc
         * is trying to clean things up.
         */

        /* Get fcport associated with d_id if it exists */
        fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));

        if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
            &fcport->flags)) {
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
                    "Connection uploading, dropping fp=%p.\n", fp);
                kfree_skb(skb);
                return;
        }

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
            "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
            ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
            fh->fh_type);
        if (qedf_dump_frames)
                print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
                    1, skb->data, skb->len, false);
        fc_exch_recv(lport, fp);
}

static void qedf_ll2_process_skb(struct work_struct *work)
{
        struct qedf_skb_work *skb_work =
            container_of(work, struct qedf_skb_work, work);
        struct qedf_ctx *qedf = skb_work->qedf;
        struct sk_buff *skb = skb_work->skb;
        struct ethhdr *eh;

        if (!qedf) {
                QEDF_ERR(NULL, "qedf is NULL\n");
                goto err_out;
        }

        eh = (struct ethhdr *)skb->data;

        /* Undo VLAN encapsulation */
        if (eh->h_proto == htons(ETH_P_8021Q)) {
                memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
                eh = skb_pull(skb, VLAN_HLEN);
                skb_reset_mac_header(skb);
        }

        /*
         * Process either a FIP frame or FCoE frame based on the
         * protocol value.  If it's not either just drop the
         * frame.
         */
        if (eh->h_proto == htons(ETH_P_FIP)) {
                qedf_fip_recv(qedf, skb);
                goto out;
        } else if (eh->h_proto == htons(ETH_P_FCOE)) {
                __skb_pull(skb, ETH_HLEN);
                qedf_recv_frame(qedf, skb);
                goto out;
        } else
                goto err_out;

err_out:
        kfree_skb(skb);
out:
        kfree(skb_work);
        return;
}

static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
        u32 arg1, u32 arg2)
{
        struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
        struct qedf_skb_work *skb_work;

        if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
                QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
                          "Dropping frame as link state is down.\n");
                kfree_skb(skb);
                return 0;
        }

        skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
        if (!skb_work) {
                QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
                           "dropping frame.\n");
                kfree_skb(skb);
                return 0;
        }

        INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
        skb_work->skb = skb;
        skb_work->qedf = qedf;
        queue_work(qedf->ll2_recv_wq, &skb_work->work);

        return 0;
}

static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
        .rx_cb = qedf_ll2_rx,
        .tx_cb = NULL,
};

/* Main thread to process I/O completions */
void qedf_fp_io_handler(struct work_struct *work)
{
        struct qedf_io_work *io_work =
            container_of(work, struct qedf_io_work, work);
        u32 comp_type;

        /*
         * Deferred part of unsolicited CQE sends
         * frame to libfc.
         */
        comp_type = (io_work->cqe.cqe_data >>
            FCOE_CQE_CQE_TYPE_SHIFT) &
            FCOE_CQE_CQE_TYPE_MASK;
        if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
            io_work->fp)
                fc_exch_recv(io_work->qedf->lport, io_work->fp);
        else
                qedf_process_cqe(io_work->qedf, &io_work->cqe);

        kfree(io_work);
}

static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
        struct qed_sb_info *sb_info, u16 sb_id)
{
        struct status_block_e4 *sb_virt;
        dma_addr_t sb_phys;
        int ret;

        sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
            sizeof(struct status_block_e4), &sb_phys, GFP_KERNEL);

        if (!sb_virt) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Status block allocation failed for id = %d.\n",
                         sb_id);
                return -ENOMEM;
        }

        ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
            sb_id, QED_SB_TYPE_STORAGE);

        if (ret) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Status block initialization failed (0x%x) for id = %d.\n",
                         ret, sb_id);
                return ret;
        }

        return 0;
}

static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
{
        if (sb_info->sb_virt)
                dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
                    (void *)sb_info->sb_virt, sb_info->sb_phys);
}

static void qedf_destroy_sb(struct qedf_ctx *qedf)
{
        int id;
        struct qedf_fastpath *fp = NULL;

        for (id = 0; id < qedf->num_queues; id++) {
                fp = &(qedf->fp_array[id]);
                if (fp->sb_id == QEDF_SB_ID_NULL)
                        break;
                qedf_free_sb(qedf, fp->sb_info);
                kfree(fp->sb_info);
        }
        kfree(qedf->fp_array);
}

static int qedf_prepare_sb(struct qedf_ctx *qedf)
{
        int id;
        struct qedf_fastpath *fp;
        int ret;

        qedf->fp_array =
            kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
                GFP_KERNEL);

        if (!qedf->fp_array) {
                QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
                          "failed.\n");
                return -ENOMEM;
        }

        for (id = 0; id < qedf->num_queues; id++) {
                fp = &(qedf->fp_array[id]);
                fp->sb_id = QEDF_SB_ID_NULL;
                fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
                if (!fp->sb_info) {
                        QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
                                  "allocation failed.\n");
                        goto err;
                }
                ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
                if (ret) {
                        QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
                                  "initialization failed.\n");
                        goto err;
                }
                fp->sb_id = id;
                fp->qedf = qedf;
                fp->cq_num_entries =
                    qedf->global_queues[id]->cq_mem_size /
                    sizeof(struct fcoe_cqe);
        }
err:
        return 0;
}

void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
{
        u16 xid;
        struct qedf_ioreq *io_req;
        struct qedf_rport *fcport;
        u32 comp_type;

        comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
            FCOE_CQE_CQE_TYPE_MASK;

        xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
        io_req = &qedf->cmd_mgr->cmds[xid];

        /* Completion not for a valid I/O anymore so just return */
        if (!io_req) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "io_req is NULL for xid=0x%x.\n", xid);
                return;
        }

        fcport = io_req->fcport;

        if (fcport == NULL) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "fcport is NULL for xid=0x%x io_req=%p.\n",
                         xid, io_req);
                return;
        }

        /*
         * Check that fcport is offloaded.  If it isn't then the spinlock
         * isn't valid and shouldn't be taken. We should just return.
         */
        if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
                QEDF_ERR(&qedf->dbg_ctx,
                         "Session not offloaded yet, fcport = %p.\n", fcport);
                return;
        }


        switch (comp_type) {
        case FCOE_GOOD_COMPLETION_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                switch (io_req->cmd_type) {
                case QEDF_SCSI_CMD:
                        qedf_scsi_completion(qedf, cqe, io_req);
                        break;
                case QEDF_ELS:
                        qedf_process_els_compl(qedf, cqe, io_req);
                        break;
                case QEDF_TASK_MGMT_CMD:
                        qedf_process_tmf_compl(qedf, cqe, io_req);
                        break;
                case QEDF_SEQ_CLEANUP:
                        qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
                        break;
                }
                break;
        case FCOE_ERROR_DETECTION_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Error detect CQE.\n");
                qedf_process_error_detect(qedf, cqe, io_req);
                break;
        case FCOE_EXCH_CLEANUP_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Cleanup CQE.\n");
                qedf_process_cleanup_compl(qedf, cqe, io_req);
                break;
        case FCOE_ABTS_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Abort CQE.\n");
                qedf_process_abts_compl(qedf, cqe, io_req);
                break;
        case FCOE_DUMMY_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Dummy CQE.\n");
                break;
        case FCOE_LOCAL_COMP_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Local completion CQE.\n");
                break;
        case FCOE_WARNING_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Warning CQE.\n");
                qedf_process_warning_compl(qedf, cqe, io_req);
                break;
        case MAX_FCOE_CQE_TYPE:
                atomic_inc(&fcport->free_sqes);
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Max FCoE CQE.\n");
                break;
        default:
                QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
                    "Default CQE.\n");
                break;
        }
}

static void qedf_free_bdq(struct qedf_ctx *qedf)
{
        int i;

        if (qedf->bdq_pbl_list)
                dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
                    qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);

        if (qedf->bdq_pbl)
                dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
                    qedf->bdq_pbl, qedf->bdq_pbl_dma);

        for (i = 0; i < QEDF_BDQ_SIZE; i++) {
                if (qedf->bdq[i].buf_addr) {
                        dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
                            qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
                }
        }
}

static void qedf_free_global_queues(struct qedf_ctx *qedf)
{
        int i;
        struct global_queue **gl = qedf->global_queues;

        for (i = 0; i < qedf->num_queues; i++) {
                if (!gl[i])
                        continue;

                if (gl[i]->cq)
                        dma_free_coherent(&qedf->pdev->dev,
                            gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
                if (gl[i]->cq_pbl)
                        dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
                            gl[i]->cq_pbl, gl[i]->cq_pbl_dma);

                kfree(gl[i]);
        }

        qedf_free_bdq(qedf);
}

static int qedf_alloc_bdq(struct qedf_ctx *qedf)
{
        int i;
        struct scsi_bd *pbl;
        u64 *list;
        dma_addr_t page;

        /* Alloc dma memory for BDQ buffers */
        for (i = 0; i < QEDF_BDQ_SIZE; i++) {
                qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
                    QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
                if (!qedf->bdq[i].buf_addr) {
                        QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
                            "buffer %d.\n", i);
                        return -ENOMEM;
                }
        }

        /* Alloc dma memory for BDQ page buffer list */
        qedf->bdq_pbl_mem_size =
            QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
        qedf->bdq_pbl_mem_size =
            ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);

        qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
            qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
        if (!qedf->bdq_pbl) {
                QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
                return -ENOMEM;
        }

        QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
                  "BDQ PBL addr=0x%p dma=%pad\n",
                  qedf->bdq_pbl, &qedf->bdq_pbl_dma);

        /*
         * Populate BDQ PBL with physical and virtual address of individual
         * BDQ buffers
         */
        pbl = (struct scsi_bd *)qedf->bdq_pbl;
        for (i = 0; i < QEDF_BDQ_SIZE; i++) {
                pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
                pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
                pbl->opaque.fcoe_opaque.hi = 0;
                /* Opaque lo data is an index into the BDQ array */
                pbl->opaque.fcoe_opaque.lo = cpu_to_le32(i);
                pbl++;
        }

        /* Allocate list of PBL pages */
        qedf->bdq_pbl_list = dma_alloc_coherent(&qedf->pdev->dev,
                                                QEDF_PAGE_SIZE,
                                                &qedf->bdq_pbl_list_dma,
                                                GFP_KERNEL);
        if (!qedf->bdq_pbl_list) {
                QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL pages.\n");
                return -ENOMEM;
        }

        /*
         * Now populate PBL list with pages that contain pointers to the
         * individual buffers.
         */
        qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
            QEDF_PAGE_SIZE;
        list = (u64 *)qedf->bdq_pbl_list;
        page = qedf->bdq_pbl_list_dma;
        for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
                *list = qedf->bdq_pbl_dma;
                list++;
                page += QEDF_PAGE_SIZE;
        }

        return 0;