// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/if_ether.h>
#include <scsi/fc/fc_fip.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_tcq.h>
#include <scsi/fc_frame.h>

#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "fnic_io.h"
#include "fnic.h"
#include "fnic_fdls.h"
#include "fdls_fc.h"

#define PCI_DEVICE_ID_CISCO_FNIC        0x0045

/* Timer to poll notification area for events. Used for MSI interrupts */
#define FNIC_NOTIFY_TIMER_PERIOD        (2 * HZ)

static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
static struct kmem_cache *fnic_io_req_cache;
static struct kmem_cache *fdls_frame_cache;
static struct kmem_cache *fdls_frame_elem_cache;
static LIST_HEAD(fnic_list);
static DEFINE_SPINLOCK(fnic_list_lock);
static DEFINE_IDA(fnic_ida);

struct work_struct reset_fnic_work;
LIST_HEAD(reset_fnic_list);
DEFINE_SPINLOCK(reset_fnic_list_lock);

/* Supported devices by fnic module */
static const struct pci_device_id fnic_id_table[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
        { 0, }
};

MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
              "Joseph R. Eykholt <jeykholt@cisco.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, fnic_id_table);

unsigned int fnic_log_level;
module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");

unsigned int fnic_fdmi_support = 1;
module_param(fnic_fdmi_support, int, 0644);
MODULE_PARM_DESC(fnic_fdmi_support, "FDMI support");

static unsigned int fnic_tgt_id_binding = 1;
module_param(fnic_tgt_id_binding, uint, 0644);
MODULE_PARM_DESC(fnic_tgt_id_binding,
                 "Target ID binding (0 for none. 1 for binding by WWPN (default))");

unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;
module_param(io_completions, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");

unsigned int fnic_trace_max_pages = 16;
module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
                                        "for fnic trace buffer");

unsigned int fnic_fc_trace_max_pages = 64;
module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_fc_trace_max_pages,
                 "Total allocated memory pages for fc trace buffer");

static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");

unsigned int pc_rscn_handling_feature_flag = PC_RSCN_HANDLING_FEATURE_ON;
module_param(pc_rscn_handling_feature_flag, uint, 0644);
MODULE_PARM_DESC(pc_rscn_handling_feature_flag,
                 "PCRSCN handling (0 for none. 1 to handle PCRSCN (default))");

struct workqueue_struct *reset_fnic_work_queue;
struct workqueue_struct *fnic_fip_queue;

static int fnic_sdev_init(struct scsi_device *sdev)
{
        struct fc_rport *rport = starget_to_rport(scsi_target(sdev));

        if (!rport || fc_remote_port_chkready(rport))
                return -ENXIO;

        scsi_change_queue_depth(sdev, fnic_max_qdepth);
        return 0;
}

static const struct scsi_host_template fnic_host_template = {
        .module = THIS_MODULE,
        .name = DRV_NAME,
        .queuecommand = fnic_queuecommand,
        .eh_timed_out = fc_eh_timed_out,
        .eh_abort_handler = fnic_abort_cmd,
        .eh_device_reset_handler = fnic_device_reset,
        .eh_host_reset_handler = fnic_eh_host_reset_handler,
        .sdev_init = fnic_sdev_init,
        .change_queue_depth = scsi_change_queue_depth,
        .this_id = -1,
        .cmd_per_lun = 3,
        .can_queue = FNIC_DFLT_IO_REQ,
        .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
        .max_sectors = 0xffff,
        .shost_groups = fnic_host_groups,
        .track_queue_depth = 1,
        .cmd_size = sizeof(struct fnic_cmd_priv),
        .map_queues = fnic_mq_map_queues_cpus,
};

static void
fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
{
        if (timeout)
                rport->dev_loss_tmo = timeout;
        else
                rport->dev_loss_tmo = 1;
}

static void fnic_get_host_speed(struct Scsi_Host *shost);
static struct scsi_transport_template *fnic_fc_transport;
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
static void fnic_reset_host_stats(struct Scsi_Host *);

static struct fc_function_template fnic_fc_functions = {

        .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 = fnic_get_host_speed,
        .show_host_speed = 1,
        .show_host_port_type = 1,
        .get_host_port_state = fnic_get_host_port_state,
        .show_host_port_state = 1,
        .show_host_symbolic_name = 1,
        .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,
        .show_rport_dev_loss_tmo = 1,
        .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
        .issue_fc_host_lip = fnic_issue_fc_host_lip,
        .get_fc_host_stats = fnic_get_stats,
        .reset_fc_host_stats = fnic_reset_host_stats,
        .dd_fcrport_size = sizeof(struct rport_dd_data_s),
        .terminate_rport_io = fnic_terminate_rport_io,
        .bsg_request = NULL,
};

static void fnic_get_host_speed(struct Scsi_Host *shost)
{
        struct fnic *fnic = *((struct fnic **) shost_priv(shost));
        u32 port_speed = vnic_dev_port_speed(fnic->vdev);
        struct fnic_stats *fnic_stats = &fnic->fnic_stats;

        FNIC_MAIN_DBG(KERN_INFO, fnic->host, fnic->fnic_num,
                                  "port_speed: %d Mbps", port_speed);
        atomic64_set(&fnic_stats->misc_stats.port_speed_in_mbps, port_speed);

        /* Add in other values as they get defined in fw */
        switch (port_speed) {
        case DCEM_PORTSPEED_1G:
                fc_host_speed(shost) = FC_PORTSPEED_1GBIT;
                break;
        case DCEM_PORTSPEED_2G:
                fc_host_speed(shost) = FC_PORTSPEED_2GBIT;
                break;
        case DCEM_PORTSPEED_4G:
                fc_host_speed(shost) = FC_PORTSPEED_4GBIT;
                break;
        case DCEM_PORTSPEED_8G:
                fc_host_speed(shost) = FC_PORTSPEED_8GBIT;
                break;
        case DCEM_PORTSPEED_10G:
                fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
                break;
        case DCEM_PORTSPEED_16G:
                fc_host_speed(shost) = FC_PORTSPEED_16GBIT;
                break;
        case DCEM_PORTSPEED_20G:
                fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
                break;
        case DCEM_PORTSPEED_25G:
                fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
                break;
        case DCEM_PORTSPEED_32G:
                fc_host_speed(shost) = FC_PORTSPEED_32GBIT;
                break;
        case DCEM_PORTSPEED_40G:
        case DCEM_PORTSPEED_4x10G:
                fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
                break;
        case DCEM_PORTSPEED_50G:
                fc_host_speed(shost) = FC_PORTSPEED_50GBIT;
                break;
        case DCEM_PORTSPEED_64G:
                fc_host_speed(shost) = FC_PORTSPEED_64GBIT;
                break;
        case DCEM_PORTSPEED_100G:
                fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
                break;
        case DCEM_PORTSPEED_128G:
                fc_host_speed(shost) = FC_PORTSPEED_128GBIT;
                break;
        default:
                FNIC_MAIN_DBG(KERN_INFO, fnic->host, fnic->fnic_num,
                                          "Unknown FC speed: %d Mbps", port_speed);
                fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
                break;
        }
}

/* Placeholder function */
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
{
        int ret;
        struct fnic *fnic = *((struct fnic **) shost_priv(host));
        struct fc_host_statistics *stats = &fnic->fnic_stats.host_stats;
        struct vnic_stats *vs;
        unsigned long flags;

        if (time_before
                (jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
                return stats;
        fnic->stats_time = jiffies;

        spin_lock_irqsave(&fnic->fnic_lock, flags);
        ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
        spin_unlock_irqrestore(&fnic->fnic_lock, flags);

        if (ret) {
                FNIC_MAIN_DBG(KERN_DEBUG, fnic->host, fnic->fnic_num,
                                          "fnic: Get vnic stats failed: 0x%x", ret);
                return stats;
        }
        vs = fnic->stats;
        stats->tx_frames = vs->tx.tx_unicast_frames_ok;
        stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
        stats->rx_frames = vs->rx.rx_unicast_frames_ok;
        stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
        stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
        stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
        stats->invalid_crc_count = vs->rx.rx_crc_errors;
        stats->seconds_since_last_reset =
                (jiffies - fnic->stats_reset_time) / HZ;
        stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
        stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
        return stats;
}

/*
 * fnic_dump_fchost_stats
 * note : dumps fc_statistics into system logs
 */
void fnic_dump_fchost_stats(struct Scsi_Host *host,
                                struct fc_host_statistics *stats)
{
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: seconds since last reset = %llu\n",
                        stats->seconds_since_last_reset);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: tx frames                = %llu\n",
                        stats->tx_frames);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: tx words         = %llu\n",
                        stats->tx_words);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: rx frames                = %llu\n",
                        stats->rx_frames);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: rx words         = %llu\n",
                        stats->rx_words);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: lip count                = %llu\n",
                        stats->lip_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: nos count                = %llu\n",
                        stats->nos_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: error frames             = %llu\n",
                        stats->error_frames);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: dumped frames    = %llu\n",
                        stats->dumped_frames);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: link failure count       = %llu\n",
                        stats->link_failure_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: loss of sync count       = %llu\n",
                        stats->loss_of_sync_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: loss of signal count     = %llu\n",
                        stats->loss_of_signal_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: prim seq protocol err count = %llu\n",
                        stats->prim_seq_protocol_err_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: invalid tx word count= %llu\n",
                        stats->invalid_tx_word_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: invalid crc count        = %llu\n",
                        stats->invalid_crc_count);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: fcp input requests       = %llu\n",
                        stats->fcp_input_requests);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: fcp output requests      = %llu\n",
                        stats->fcp_output_requests);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: fcp control requests     = %llu\n",
                        stats->fcp_control_requests);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: fcp input megabytes      = %llu\n",
                        stats->fcp_input_megabytes);
        FNIC_MAIN_NOTE(KERN_NOTICE, host,
                        "fnic: fcp output megabytes     = %llu\n",
                        stats->fcp_output_megabytes);
        return;
}

/*
 * fnic_reset_host_stats : clears host stats
 * note : called when reset_statistics set under sysfs dir
 */
static void fnic_reset_host_stats(struct Scsi_Host *host)
{
        int ret;
        struct fnic *fnic = *((struct fnic **) shost_priv(host));
        struct fc_host_statistics *stats;
        unsigned long flags;

        /* dump current stats, before clearing them */
        stats = fnic_get_stats(host);
        fnic_dump_fchost_stats(host, stats);

        spin_lock_irqsave(&fnic->fnic_lock, flags);
        ret = vnic_dev_stats_clear(fnic->vdev);
        spin_unlock_irqrestore(&fnic->fnic_lock, flags);

        if (ret) {
                FNIC_MAIN_DBG(KERN_DEBUG, fnic->host, fnic->fnic_num,
                                "fnic: Reset vnic stats failed"
                                " 0x%x", ret);
                return;
        }
        fnic->stats_reset_time = jiffies;
        memset(stats, 0, sizeof(*stats));

        return;
}

void fnic_log_q_error(struct fnic *fnic)
{
        unsigned int i;
        u32 error_status;

        for (i = 0; i < fnic->raw_wq_count; i++) {
                error_status = ioread32(&fnic->wq[i].ctrl->error_status);
                if (error_status)
                        dev_err(&fnic->pdev->dev, "WQ[%d] error_status %d\n", i, error_status);
        }

        for (i = 0; i < fnic->rq_count; i++) {
                error_status = ioread32(&fnic->rq[i].ctrl->error_status);
                if (error_status)
                        dev_err(&fnic->pdev->dev, "RQ[%d] error_status %d\n", i, error_status);
        }

        for (i = 0; i < fnic->wq_copy_count; i++) {
                error_status = ioread32(&fnic->hw_copy_wq[i].ctrl->error_status);
                if (error_status)
                        dev_err(&fnic->pdev->dev, "CWQ[%d] error_status %d\n", i, error_status);
        }
}

void fnic_handle_link_event(struct fnic *fnic)
{
        unsigned long flags;

        spin_lock_irqsave(&fnic->fnic_lock, flags);
        if (fnic->stop_rx_link_events) {
                spin_unlock_irqrestore(&fnic->fnic_lock, flags);
                return;
        }
        spin_unlock_irqrestore(&fnic->fnic_lock, flags);

        queue_work(fnic_event_queue, &fnic->link_work);

}

static int fnic_notify_set(struct fnic *fnic)
{
        int err;

        switch (vnic_dev_get_intr_mode(fnic->vdev)) {
        case VNIC_DEV_INTR_MODE_INTX:
                err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
                break;
        case VNIC_DEV_INTR_MODE_MSI:
                err = vnic_dev_notify_set(fnic->vdev, -1);
                break;
        case VNIC_DEV_INTR_MODE_MSIX:
                err = vnic_dev_notify_set(fnic->vdev, fnic->wq_copy_count + fnic->copy_wq_base);
                break;
        default:
                dev_err(&fnic->pdev->dev, "Interrupt mode should be set up"
                             " before devcmd notify set %d\n",
                             vnic_dev_get_intr_mode(fnic->vdev));
                err = -1;
                break;
        }

        return err;
}

static void fnic_notify_timer(struct timer_list *t)
{
        struct fnic *fnic = timer_container_of(fnic, t, notify_timer);

        fnic_handle_link_event(fnic);
        mod_timer(&fnic->notify_timer,
                  round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
}

static void fnic_notify_timer_start(struct fnic *fnic)
{
        switch (vnic_dev_get_intr_mode(fnic->vdev)) {
        case VNIC_DEV_INTR_MODE_MSI:
                /*
                 * Schedule first timeout immediately. The driver is
                 * initiatialized and ready to look for link up notification
                 */
                mod_timer(&fnic->notify_timer, jiffies);
                break;
        default:
                /* Using intr for notification for INTx/MSI-X */
                break;
        }
}

static int fnic_dev_wait(struct vnic_dev *vdev,
                         int (*start)(struct vnic_dev *, int),
                         int (*finished)(struct vnic_dev *, int *),
                         int arg)
{
        unsigned long time;
        int done;
        int err;
        int count;

        count = 0;

        err = start(vdev, arg);
        if (err)
                return err;

        /* Wait for func to complete.
        * Sometime schedule_timeout_uninterruptible take long time
        * to wake up so we do not retry as we are only waiting for
        * 2 seconds in while loop. By adding count, we make sure
        * we try atleast three times before returning -ETIMEDOUT
        */
        time = jiffies + (HZ * 2);
        do {
                err = finished(vdev, &done);
                count++;
                if (err)
                        return err;
                if (done)
                        return 0;
                schedule_timeout_uninterruptible(HZ / 10);
        } while (time_after(time, jiffies) || (count < 3));

        return -ETIMEDOUT;
}

static int fnic_cleanup(struct fnic *fnic)
{
        unsigned int i;
        int err;
        int raw_wq_rq_counts;

        vnic_dev_disable(fnic->vdev);
        for (i = 0; i < fnic->intr_count; i++)
                vnic_intr_mask(&fnic->intr[i]);

        for (i = 0; i < fnic->rq_count; i++) {
                err = vnic_rq_disable(&fnic->rq[i]);
                if (err)
                        return err;
        }
        for (i = 0; i < fnic->raw_wq_count; i++) {
                err = vnic_wq_disable(&fnic->wq[i]);
                if (err)
                        return err;
        }
        for (i = 0; i < fnic->wq_copy_count; i++) {
                err = vnic_wq_copy_disable(&fnic->hw_copy_wq[i]);
                if (err)
                        return err;
                raw_wq_rq_counts = fnic->raw_wq_count + fnic->rq_count;
                fnic_wq_copy_cmpl_handler(fnic, -1, i + raw_wq_rq_counts);
        }

        /* Clean up completed IOs and FCS frames */
        fnic_wq_cmpl_handler(fnic, -1);
        fnic_rq_cmpl_handler(fnic, -1);

        /* Clean up the IOs and FCS frames that have not completed */
        for (i = 0; i < fnic->raw_wq_count; i++)
                vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
        for (i = 0; i < fnic->rq_count; i++)
                vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
        for (i = 0; i < fnic->wq_copy_count; i++)
                vnic_wq_copy_clean(&fnic->hw_copy_wq[i],
                                   fnic_wq_copy_cleanup_handler);

        for (i = 0; i < fnic->cq_count; i++)
                vnic_cq_clean(&fnic->cq[i]);
        for (i = 0; i < fnic->intr_count; i++)
                vnic_intr_clean(&fnic->intr[i]);

        mempool_destroy(fnic->io_req_pool);
        mempool_destroy(fnic->frame_pool);
        mempool_destroy(fnic->frame_elem_pool);
        for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
                mempool_destroy(fnic->io_sgl_pool[i]);

        return 0;
}

static void fnic_iounmap(struct fnic *fnic)
{
        if (fnic->bar0.vaddr)
                iounmap(fnic->bar0.vaddr);
}

static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
{
        vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
}

static void fnic_scsi_init(struct fnic *fnic)
{
        struct Scsi_Host *host = fnic->host;

        snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
                         host->host_no);

        host->transportt = fnic_fc_transport;
}

static void fnic_free_ioreq_tables_mq(struct fnic *fnic)
{
        int hwq;

        for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)
                kfree(fnic->sw_copy_wq[hwq].io_req_table);
}

static int fnic_scsi_drv_init(struct fnic *fnic)
{
        struct Scsi_Host *host = fnic->host;
        int err;
        struct pci_dev *pdev = fnic->pdev;
        struct fnic_iport_s *iport = &fnic->iport;
        int hwq;

        /* Configure maximum outstanding IO reqs*/
        if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD)
                host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
                                        max_t(u32, FNIC_MIN_IO_REQ,
                                        fnic->config.io_throttle_count));

        fnic->fnic_max_tag_id = host->can_queue;
        host->max_lun = fnic->config.luns_per_tgt;
        host->max_id = FNIC_MAX_FCP_TARGET;
        host->max_cmd_len = FNIC_FCOE_MAX_CMD_LEN;

        host->nr_hw_queues = fnic->wq_copy_count;

        dev_info(&fnic->pdev->dev, "fnic: can_queue: %d max_lun: %llu",
                        host->can_queue, host->max_lun);

        dev_info(&fnic->pdev->dev, "fnic: max_id: %d max_cmd_len: %d nr_hw_queues: %d",
                        host->max_id, host->max_cmd_len, host->nr_hw_queues);

        for (hwq = 0; hwq < fnic->wq_copy_count; hwq++) {
                fnic->sw_copy_wq[hwq].ioreq_table_size = fnic->fnic_max_tag_id;
                fnic->sw_copy_wq[hwq].io_req_table =
                        kzalloc((fnic->sw_copy_wq[hwq].ioreq_table_size + 1) *
                                        sizeof(struct fnic_io_req *), GFP_KERNEL);

                if (!fnic->sw_copy_wq[hwq].io_req_table) {
                        fnic_free_ioreq_tables_mq(fnic);
                        return -ENOMEM;
                }
        }

        dev_info(&fnic->pdev->dev, "fnic copy wqs: %d, Q0 ioreq table size: %d\n",
                        fnic->wq_copy_count, fnic->sw_copy_wq[0].ioreq_table_size);

        fnic_scsi_init(fnic);

        err = scsi_add_host(fnic->host, &pdev->dev);
        if (err) {
                dev_err(&fnic->pdev->dev, "fnic: scsi add host failed: aborting\n");
                return err;
        }
        fc_host_maxframe_size(fnic->host) = iport->max_payload_size;
        fc_host_dev_loss_tmo(fnic->host) =
                fnic->config.port_down_timeout / 1000;
        sprintf(fc_host_symbolic_name(fnic->host),
                        DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
        fc_host_port_type(fnic->host) = FC_PORTTYPE_NPORT;
        fc_host_node_name(fnic->host) = iport->wwnn;
        fc_host_port_name(fnic->host) = iport->wwpn;
        fc_host_supported_classes(fnic->host) = FC_COS_CLASS3;
        memset(fc_host_supported_fc4s(fnic->host), 0,
                   sizeof(fc_host_supported_fc4s(fnic->host)));
        fc_host_supported_fc4s(fnic->host)[2] = 1;
        fc_host_supported_fc4s(fnic->host)[7] = 1;
        fc_host_supported_speeds(fnic->host) = 0;
        fc_host_supported_speeds(fnic->host) |= FC_PORTSPEED_8GBIT;

        dev_info(&fnic->pdev->dev, "shost_data: 0x%p\n", fnic->host->shost_data);
        if (fnic->host->shost_data != NULL) {
                if (fnic_tgt_id_binding == 0) {
                        dev_info(&fnic->pdev->dev, "Setting target binding to NONE\n");
                        fc_host_tgtid_bind_type(fnic->host) = FC_TGTID_BIND_NONE;
                } else {
                        dev_info(&fnic->pdev->dev, "Setting target binding to WWPN\n");
                        fc_host_tgtid_bind_type(fnic->host) = FC_TGTID_BIND_BY_WWPN;
                }
        }

        fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
        if (!fnic->io_req_pool) {
                scsi_remove_host(fnic->host);
                return -ENOMEM;
        }

        return 0;
}

void fnic_mq_map_queues_cpus(struct Scsi_Host *host)
{
        struct fnic *fnic = *((struct fnic **) shost_priv(host));
        struct pci_dev *l_pdev = fnic->pdev;
        int intr_mode = fnic->config.intr_mode;
        struct blk_mq_queue_map *qmap = &host->tag_set.map[HCTX_TYPE_DEFAULT];

        if (intr_mode == VNIC_DEV_INTR_MODE_MSI || intr_mode == VNIC_DEV_INTR_MODE_INTX) {
                FNIC_MAIN_DBG(KERN_ERR, fnic->host, fnic->fnic_num,
                        "intr_mode is not msix\n");
                return;
        }

        FNIC_MAIN_DBG(KERN_INFO, fnic->host, fnic->fnic_num,
                        "qmap->nr_queues: %d\n", qmap->nr_queues);

        if (l_pdev == NULL) {
                FNIC_MAIN_DBG(KERN_ERR, fnic->host, fnic->fnic_num,
                                                "l_pdev is null\n");
                return;
        }

        blk_mq_map_hw_queues(qmap, &l_pdev->dev, FNIC_PCI_OFFSET);
}

static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct Scsi_Host *host = NULL;
        struct fnic *fnic;
        mempool_t *pool;
        struct fnic_iport_s *iport;
        int err = 0;
        int fnic_id = 0;
        int i;
        unsigned long flags;
        char *desc, *subsys_desc;
        int len;

        /*
         * Allocate fnic
         */
        fnic = kzalloc_obj(struct fnic);
        if (!fnic) {
                err = -ENOMEM;
                goto err_out_fnic_alloc;
        }

        iport = &fnic->iport;

        fnic_id = ida_alloc(&fnic_ida, GFP_KERNEL);
        if (fnic_id < 0) {
                dev_err(&pdev->dev, "Unable to alloc fnic ID\n");
                err = fnic_id;
                goto err_out_ida_alloc;
        }

        fnic->pdev = pdev;
        fnic->fnic_num = fnic_id;

        /* Find model name from PCIe subsys ID */
        if (fnic_get_desc_by_devid(pdev, &desc, &subsys_desc) == 0) {
                dev_info(&fnic->pdev->dev, "Model: %s\n", subsys_desc);

                /* Update FDMI model */
                fnic->subsys_desc_len = strlen(subsys_desc);
                len = ARRAY_SIZE(fnic->subsys_desc);
                if (fnic->subsys_desc_len > len)
                        fnic->subsys_desc_len = len;
                memcpy(fnic->subsys_desc, subsys_desc, fnic->subsys_desc_len);
                dev_info(&fnic->pdev->dev, "FDMI Model: %s\n", fnic->subsys_desc);
        } else {
                fnic->subsys_desc_len = 0;
                dev_info(&fnic->pdev->dev, "Model: %s subsys_id: 0x%04x\n", "Unknown",
                                pdev->subsystem_device);
        }

        err = pci_enable_device(pdev);
        if (err) {
                dev_err(&fnic->pdev->dev, "Cannot enable PCI device, aborting.\n");
                goto err_out_pci_enable_device;
        }

        err = pci_request_regions(pdev, DRV_NAME);
        if (err) {
                dev_err(&fnic->pdev->dev, "Cannot enable PCI resources, aborting\n");
                goto err_out_pci_request_regions;
        }

        pci_set_master(pdev);

        /* Query PCI controller on system for DMA addressing
         * limitation for the device.  Try 47-bit first, and
         * fail to 32-bit. Cisco VIC supports 47 bits only.
         */
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));
        if (err) {
                err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&fnic->pdev->dev, "No usable DMA configuration "
                                     "aborting\n");
                        goto err_out_set_dma_mask;
                }
        }

        /* Map vNIC resources from BAR0 */
        if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
                dev_err(&fnic->pdev->dev, "BAR0 not memory-map'able, aborting.\n");
                err = -ENODEV;
                goto err_out_map_bar;
        }

        fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
        fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
        fnic->bar0.len = pci_resource_len(pdev, 0);

        if (!fnic->bar0.vaddr) {
                dev_err(&fnic->pdev->dev, "Cannot memory-map BAR0 res hdr, "
                             "aborting.\n");
                err = -ENODEV;
                goto err_out_fnic_map_bar;
        }

        fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
        if (!fnic->vdev) {
                dev_err(&fnic->pdev->dev, "vNIC registration failed, "
                             "aborting.\n");
                err = -ENODEV;
                goto err_out_dev_register;
        }

        err = vnic_dev_cmd_init(fnic->vdev);
        if (err) {
                dev_err(&fnic->pdev->dev, "vnic_dev_cmd_init() returns %d, aborting\n",
                                err);
                goto err_out_dev_cmd_init;
        }

        err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
                            vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);
        if (err) {
                dev_err(&fnic->pdev->dev, "vNIC dev open failed, aborting.\n");
                goto err_out_dev_open;
        }

        err = vnic_dev_init(fnic->vdev, 0);
        if (err) {
                dev_err(&fnic->pdev->dev, "vNIC dev init failed, aborting.\n");
                goto err_out_dev_init;
        }

        err = vnic_dev_mac_addr(fnic->vdev, iport->hwmac);
        if (err) {
                dev_err(&fnic->pdev->dev, "vNIC get MAC addr failed\n");
                goto err_out_dev_mac_addr;
        }
        /* set data_src for point-to-point mode and to keep it non-zero */
        memcpy(fnic->data_src_addr, iport->hwmac, ETH_ALEN);

        /* Get vNIC configuration */
        err = fnic_get_vnic_config(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Get vNIC configuration failed, "
                             "aborting.\n");
                goto err_out_fnic_get_config;
        }

        switch (fnic->config.flags & 0xff0) {
        case VFCF_FC_INITIATOR:
                {
                        host =
                                scsi_host_alloc(&fnic_host_template,
                                                                sizeof(struct fnic *));
                        if (!host) {
                                dev_err(&fnic->pdev->dev, "Unable to allocate scsi host\n");
                                err = -ENOMEM;
                                goto err_out_scsi_host_alloc;
                        }
                        *((struct fnic **) shost_priv(host)) = fnic;

                        fnic->host = host;
                        fnic->role = FNIC_ROLE_FCP_INITIATOR;
                        dev_info(&fnic->pdev->dev, "fnic: %d is scsi initiator\n",
                                        fnic->fnic_num);
                }
                break;
        default:
                dev_info(&fnic->pdev->dev, "fnic: %d has no role defined\n", fnic->fnic_num);
                err = -EINVAL;
                goto err_out_fnic_role;
        }

        /* Setup PCI resources */
        pci_set_drvdata(pdev, fnic);

        fnic_get_res_counts(fnic);

        err = fnic_set_intr_mode(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Failed to set intr mode, "
                             "aborting.\n");
                goto err_out_fnic_set_intr_mode;
        }

        err = fnic_alloc_vnic_resources(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Failed to alloc vNIC resources, "
                             "aborting.\n");
                goto err_out_fnic_alloc_vnic_res;
        }
        dev_info(&fnic->pdev->dev, "fnic copy wqs: %d, Q0 ioreq table size: %d\n",
                        fnic->wq_copy_count, fnic->sw_copy_wq[0].ioreq_table_size);

        /* initialize all fnic locks */
        spin_lock_init(&fnic->fnic_lock);

        for (i = 0; i < FNIC_WQ_MAX; i++)
                spin_lock_init(&fnic->wq_lock[i]);

        for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
                spin_lock_init(&fnic->wq_copy_lock[i]);
                fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
                fnic->fw_ack_recd[i] = 0;
                fnic->fw_ack_index[i] = -1;
        }

        pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
        if (!pool) {
                err = -ENOMEM;
                goto err_out_free_resources;
        }
        fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;

        pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
        if (!pool) {
                err = -ENOMEM;
                goto err_out_free_dflt_pool;
        }
        fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;

        pool = mempool_create_slab_pool(FDLS_MIN_FRAMES, fdls_frame_cache);
        if (!pool) {
                err = -ENOMEM;
                goto err_out_fdls_frame_pool;
        }
        fnic->frame_pool = pool;

        pool = mempool_create_slab_pool(FDLS_MIN_FRAME_ELEM,
                                                fdls_frame_elem_cache);
        if (!pool) {
                err = -ENOMEM;
                goto err_out_fdls_frame_elem_pool;
        }
        fnic->frame_elem_pool = pool;

        /* setup vlan config, hw inserts vlan header */
        fnic->vlan_hw_insert = 1;
        fnic->vlan_id = 0;

        if (fnic->config.flags & VFCF_FIP_CAPABLE) {
                dev_info(&fnic->pdev->dev, "firmware supports FIP\n");
                /* enable directed and multicast */
                vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
                vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
                vnic_dev_add_addr(fnic->vdev, iport->hwmac);
                spin_lock_init(&fnic->vlans_lock);
                INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
                INIT_LIST_HEAD(&fnic->fip_frame_queue);
                INIT_LIST_HEAD(&fnic->vlan_list);
                timer_setup(&fnic->retry_fip_timer, fnic_handle_fip_timer, 0);
                timer_setup(&fnic->fcs_ka_timer, fnic_handle_fcs_ka_timer, 0);
                timer_setup(&fnic->enode_ka_timer, fnic_handle_enode_ka_timer, 0);
                timer_setup(&fnic->vn_ka_timer, fnic_handle_vn_ka_timer, 0);
                fnic->set_vlan = fnic_set_vlan;
        } else {
                dev_info(&fnic->pdev->dev, "firmware uses non-FIP mode\n");
        }
        fnic->state = FNIC_IN_FC_MODE;

        atomic_set(&fnic->in_flight, 0);
        fnic->state_flags = FNIC_FLAGS_NONE;

        /* Enable hardware stripping of vlan header on ingress */
        fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);

        /* Setup notification buffer area */
        err = fnic_notify_set(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Failed to alloc notify buffer, aborting.\n");
                goto err_out_fnic_notify_set;
        }

        /* Setup notify timer when using MSI interrupts */
        if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
                timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);

        /* allocate RQ buffers and post them to RQ*/
        for (i = 0; i < fnic->rq_count; i++) {
                err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
                if (err) {
                        dev_err(&fnic->pdev->dev, "fnic_alloc_rq_frame can't alloc "
                                     "frame\n");
                        goto err_out_alloc_rq_buf;
                }
        }

        init_completion(&fnic->reset_completion_wait);

        /* Start local port initialization */
        iport->max_flogi_retries = fnic->config.flogi_retries;
        iport->max_plogi_retries = fnic->config.plogi_retries;
        iport->plogi_timeout = fnic->config.plogi_timeout;
        iport->service_params =
                (FNIC_FCP_SP_INITIATOR | FNIC_FCP_SP_RD_XRDY_DIS |
                 FNIC_FCP_SP_CONF_CMPL);
        if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
                iport->service_params |= FNIC_FCP_SP_RETRY;

        iport->boot_time = jiffies;
        iport->e_d_tov = fnic->config.ed_tov;
        iport->r_a_tov = fnic->config.ra_tov;
        iport->link_supported_speeds = FNIC_PORTSPEED_10GBIT;
        iport->wwpn = fnic->config.port_wwn;
        iport->wwnn = fnic->config.node_wwn;

        iport->max_payload_size = fnic->config.maxdatafieldsize;

        if ((iport->max_payload_size < FNIC_MIN_DATA_FIELD_SIZE) ||
                (iport->max_payload_size > FNIC_FC_MAX_PAYLOAD_LEN) ||
                ((iport->max_payload_size % 4) != 0)) {
                iport->max_payload_size = FNIC_FC_MAX_PAYLOAD_LEN;
        }

        iport->flags |= FNIC_FIRST_LINK_UP;

        timer_setup(&(iport->fabric.retry_timer), fdls_fabric_timer_callback,
                                0);

        fnic->stats_reset_time = jiffies;

        INIT_WORK(&fnic->link_work, fnic_handle_link);
        INIT_WORK(&fnic->frame_work, fnic_handle_frame);
        INIT_WORK(&fnic->tport_work, fnic_tport_event_handler);
        INIT_WORK(&fnic->flush_work, fnic_flush_tx);

        INIT_LIST_HEAD(&fnic->frame_queue);
        INIT_LIST_HEAD(&fnic->tx_queue);
        INIT_LIST_HEAD(&fnic->tport_event_list);

        INIT_DELAYED_WORK(&iport->oxid_pool.schedule_oxid_free_retry,
        fdls_schedule_oxid_free_retry_work);

        /* Initialize the oxid reclaim list and work struct */
        INIT_LIST_HEAD(&iport->oxid_pool.oxid_reclaim_list);
        INIT_DELAYED_WORK(&iport->oxid_pool.oxid_reclaim_work, fdls_reclaim_oxid_handler);

        /* Enable all queues */
        for (i = 0; i < fnic->raw_wq_count; i++)
                vnic_wq_enable(&fnic->wq[i]);
        for (i = 0; i < fnic->rq_count; i++) {
                if (!ioread32(&fnic->rq[i].ctrl->enable))
                        vnic_rq_enable(&fnic->rq[i]);
        }
        for (i = 0; i < fnic->wq_copy_count; i++)
                vnic_wq_copy_enable(&fnic->hw_copy_wq[i]);

        vnic_dev_enable(fnic->vdev);

        err = fnic_request_intr(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Unable to request irq.\n");
                goto err_out_fnic_request_intr;
        }

        fnic_notify_timer_start(fnic);

        fnic_fdls_init(fnic, (fnic->config.flags & VFCF_FIP_CAPABLE));

        err = fnic_scsi_drv_init(fnic);
        if (err)
                goto err_out_scsi_drv_init;

        err = fnic_stats_debugfs_init(fnic);
        if (err) {
                dev_err(&fnic->pdev->dev, "Failed to initialize debugfs for stats\n");
                goto err_out_free_stats_debugfs;
        }

        for (i = 0; i < fnic->intr_count; i++)
                vnic_intr_unmask(&fnic->intr[i]);

        spin_lock_irqsave(&fnic_list_lock, flags);
        list_add_tail(&fnic->list, &fnic_list);
        spin_unlock_irqrestore(&fnic_list_lock, flags);

        return 0;

err_out_free_stats_debugfs:
        fnic_stats_debugfs_remove(fnic);
        fnic_free_ioreq_tables_mq(fnic);
        scsi_remove_host(fnic->host);
err_out_scsi_drv_init:
        fnic_free_intr(fnic);
err_out_fnic_request_intr:
err_out_alloc_rq_buf:
        for (i = 0; i < fnic->rq_count; i++) {
                if (ioread32(&fnic->rq[i].ctrl->enable))
                        vnic_rq_disable(&fnic->rq[i]);
                vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
        }
        vnic_dev_notify_unset(fnic->vdev);
err_out_fnic_notify_set:
        mempool_destroy(fnic->frame_elem_pool);
err_out_fdls_frame_elem_pool:
        mempool_destroy(fnic->frame_pool);
err_out_fdls_frame_pool:
        mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
err_out_free_dflt_pool:
        mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
err_out_free_resources:
        fnic_free_vnic_resources(fnic);
err_out_fnic_alloc_vnic_res:
        fnic_clear_intr_mode(fnic);
err_out_fnic_set_intr_mode:
        scsi_host_put(fnic->host);
err_out_fnic_role:
err_out_scsi_host_alloc:
err_out_fnic_get_config:
err_out_dev_mac_addr:
err_out_dev_init:
        vnic_dev_close(fnic->vdev);
err_out_dev_open:
err_out_dev_cmd_init:
        vnic_dev_unregister(fnic->vdev);
err_out_dev_register:
        fnic_iounmap(fnic);
err_out_fnic_map_bar:
err_out_map_bar:
err_out_set_dma_mask:
        pci_release_regions(pdev);
err_out_pci_request_regions:
        pci_disable_device(pdev);
err_out_pci_enable_device:
        ida_free(&fnic_ida, fnic->fnic_num);
err_out_ida_alloc:
        kfree(fnic);
err_out_fnic_alloc:
        return err;
}

static void fnic_remove(struct pci_dev *pdev)
{
        struct fnic *fnic = pci_get_drvdata(pdev);
        unsigned long flags;

        /*
         * Sometimes when probe() fails and do not exit with an error code,
         * remove() gets called with 'drvdata' not set. Avoid a crash by
         * adding a defensive check.
         */
        if (!fnic)
                return;

        spin_lock_irqsave(&fnic->fnic_lock, flags);
        fnic->stop_rx_link_events = 1;
        spin_unlock_irqrestore(&fnic->fnic_lock, flags);

        /*
         * Flush the fnic event queue. After this call, there should
         * be no event queued for this fnic device in the workqueue
         */
        flush_workqueue(fnic_event_queue);

        fnic_scsi_unload(fnic);

        if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
                timer_delete_sync(&fnic->notify_timer);

        if (fnic->config.flags & VFCF_FIP_CAPABLE) {
                timer_delete_sync(&fnic->retry_fip_timer);
                timer_delete_sync(&fnic->fcs_ka_timer);
                timer_delete_sync(&fnic->enode_ka_timer);
                timer_delete_sync(&fnic->vn_ka_timer);

                fnic_free_txq(&fnic->fip_frame_queue);
                fnic_fcoe_reset_vlans(fnic);
        }

        if ((fnic_fdmi_support == 1) && (fnic->iport.fabric.fdmi_pending > 0))
                timer_delete_sync(&fnic->iport.fabric.fdmi_timer);

        fnic_stats_debugfs_remove(fnic);

        /*
         * This stops the fnic device, masks all interrupts. Completed
         * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
         * cleaned up
         */
        fnic_cleanup(fnic);

        spin_lock_irqsave(&fnic_list_lock, flags);
        list_del(&fnic->list);
        spin_unlock_irqrestore(&fnic_list_lock, flags);

        fnic_free_txq(&fnic->frame_queue);
        fnic_free_txq(&fnic->tx_queue);

        vnic_dev_notify_unset(fnic->vdev);
        fnic_free_intr(fnic);
        fnic_free_vnic_resources(fnic);
        fnic_clear_intr_mode(fnic);
        vnic_dev_close(fnic->vdev);
        vnic_dev_unregister(fnic->vdev);
        fnic_iounmap(fnic);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
        pci_set_drvdata(pdev, NULL);
        ida_free(&fnic_ida, fnic->fnic_num);
        fnic_scsi_unload_cleanup(fnic);
        scsi_host_put(fnic->host);
        kfree(fnic);
}

static struct pci_driver fnic_driver = {
        .name = DRV_NAME,
        .id_table = fnic_id_table,
        .probe = fnic_probe,
        .remove = fnic_remove,
};

static int __init fnic_init_module(void)
{
        size_t len;
        int err = 0;

        printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);

        /* Create debugfs entries for fnic */
        err = fnic_debugfs_init();
        if (err < 0) {
                printk(KERN_ERR PFX "Failed to create fnic directory "
                                "for tracing and stats logging\n");
                fnic_debugfs_terminate();
        }

        /* Allocate memory for trace buffer */
        err = fnic_trace_buf_init();
        if (err < 0) {
                printk(KERN_ERR PFX
                       "Trace buffer initialization Failed. "
                       "Fnic Tracing utility is disabled\n");
                fnic_trace_free();
        }

    /* Allocate memory for fc trace buffer */
        err = fnic_fc_trace_init();
        if (err < 0) {
                printk(KERN_ERR PFX "FC trace buffer initialization Failed "
                       "FC frame tracing utility is disabled\n");
                fnic_fc_trace_free();
        }

        /* Create a cache for allocation of default size sgls */
        len = sizeof(struct fnic_dflt_sgl_list);
        fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
                ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
                 SLAB_HWCACHE_ALIGN,
                 NULL);
        if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
                printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
                err = -ENOMEM;
                goto err_create_fnic_sgl_slab_dflt;
        }

        /* Create a cache for allocation of max size sgls*/
        len = sizeof(struct fnic_sgl_list);
        fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
                ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
                  SLAB_HWCACHE_ALIGN,
                  NULL);
        if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
                printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
                err = -ENOMEM;
                goto err_create_fnic_sgl_slab_max;
        }

        /* Create a cache of io_req structs for use via mempool */
        fnic_io_req_cache = kmem_cache_create("fnic_io_req",
                                              sizeof(struct fnic_io_req),
                                              0, SLAB_HWCACHE_ALIGN, NULL);
        if (!fnic_io_req_cache) {
                printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
                err = -ENOMEM;
                goto err_create_fnic_ioreq_slab;
        }

        fdls_frame_cache = kmem_cache_create("fdls_frames",
                                        FNIC_FCOE_FRAME_MAXSZ,
                                        0, SLAB_HWCACHE_ALIGN, NULL);
        if (!fdls_frame_cache) {
                pr_err("fnic fdls frame cache create failed\n");
                err = -ENOMEM;
                goto err_create_fdls_frame_cache;
        }

        fdls_frame_elem_cache = kmem_cache_create("fdls_frame_elem",
                                        sizeof(struct fnic_frame_list),
                                        0, SLAB_HWCACHE_ALIGN, NULL);
        if (!fdls_frame_elem_cache) {
                pr_err("fnic fdls frame elem cache create failed\n");
                err = -ENOMEM;
                goto err_create_fdls_frame_cache_elem;
        }

        fnic_event_queue =
                alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_event_wq");
        if (!fnic_event_queue) {
                printk(KERN_ERR PFX "fnic work queue create failed\n");
                err = -ENOMEM;
                goto err_create_fnic_workq;
        }

        fnic_fip_queue =
                alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_fip_q");
        if (!fnic_fip_queue) {
                printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
                err = -ENOMEM;
                goto err_create_fip_workq;
        }

        if (pc_rscn_handling_feature_flag == PC_RSCN_HANDLING_FEATURE_ON) {
                reset_fnic_work_queue =
                        create_singlethread_workqueue("reset_fnic_work_queue");
                if (!reset_fnic_work_queue) {
                        pr_err("reset fnic work queue create failed\n");
                        err = -ENOMEM;
                        goto err_create_reset_fnic_workq;
                }
                spin_lock_init(&reset_fnic_list_lock);
                INIT_LIST_HEAD(&reset_fnic_list);
                INIT_WORK(&reset_fnic_work, fnic_reset_work_handler);
        }

        fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
        if (!fnic_fc_transport) {
                printk(KERN_ERR PFX "fc_attach_transport error\n");
                err = -ENOMEM;
                goto err_fc_transport;
        }

        /* register the driver with PCI system */
        err = pci_register_driver(&fnic_driver);
        if (err < 0) {
                printk(KERN_ERR PFX "pci register error\n");
                goto err_pci_register;
        }
        return err;

err_pci_register:
        fc_release_transport(fnic_fc_transport);
err_fc_transport:
        destroy_workqueue(fnic_fip_queue);
err_create_fip_workq:
        if (pc_rscn_handling_feature_flag == PC_RSCN_HANDLING_FEATURE_ON)
                destroy_workqueue(reset_fnic_work_queue);
err_create_reset_fnic_workq:
        destroy_workqueue(fnic_event_queue);
err_create_fnic_workq:
        kmem_cache_destroy(fdls_frame_elem_cache);
err_create_fdls_frame_cache_elem:
        kmem_cache_destroy(fdls_frame_cache);
err_create_fdls_frame_cache:
        kmem_cache_destroy(fnic_io_req_cache);
err_create_fnic_ioreq_slab:
        kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
err_create_fnic_sgl_slab_max:
        kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
err_create_fnic_sgl_slab_dflt:
        fnic_trace_free();
        fnic_fc_trace_free();
        fnic_debugfs_terminate();
        return err;
}

static void __exit fnic_cleanup_module(void)
{
        pci_unregister_driver(&fnic_driver);
        destroy_workqueue(fnic_event_queue);

        if (pc_rscn_handling_feature_flag == PC_RSCN_HANDLING_FEATURE_ON)
                destroy_workqueue(reset_fnic_work_queue);

        if (fnic_fip_queue)
                destroy_workqueue(fnic_fip_queue);

        kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
        kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
        kmem_cache_destroy(fnic_io_req_cache);
        kmem_cache_destroy(fdls_frame_cache);
        fc_release_transport(fnic_fc_transport);
        fnic_trace_free();
        fnic_fc_trace_free();
        fnic_debugfs_terminate();
        ida_destroy(&fnic_ida);
}

module_init(fnic_init_module);
module_exit(fnic_cleanup_module);