/*-
 * Copyright (c) 2017 Broadcom. All rights reserved.
 * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @defgroup scsi_api_target SCSI Target API
 * @defgroup scsi_api_initiator SCSI Initiator API
 * @defgroup cam_api Common Access Method (CAM) API
 * @defgroup cam_io CAM IO
 */

/**
 * @file
 * Provides CAM functionality.
 */

#include "ocs.h"
#include "ocs_scsi.h"
#include "ocs_device.h"
#include <sys/sbuf.h>

/* Default IO timeout value for initiators is 30 seconds */
#define OCS_CAM_IO_TIMEOUT      30

typedef struct {
        ocs_scsi_sgl_t *sgl;
        uint32_t sgl_max;
        uint32_t sgl_count;
        int32_t rc;
} ocs_dmamap_load_arg_t;

struct ocs_scsi_status_desc {
        ocs_scsi_io_status_e status;
        const char *desc;
} ocs_status_desc[] = {
        { OCS_SCSI_STATUS_GOOD, "Good" },
        { OCS_SCSI_STATUS_ABORTED, "Aborted" },
        { OCS_SCSI_STATUS_ERROR, "Error" },
        { OCS_SCSI_STATUS_DIF_GUARD_ERROR, "DIF Guard Error" },
        { OCS_SCSI_STATUS_DIF_REF_TAG_ERROR, "DIF REF Tag Error" },
        { OCS_SCSI_STATUS_DIF_APP_TAG_ERROR, "DIF App Tag Error" },
        { OCS_SCSI_STATUS_DIF_UNKNOWN_ERROR, "DIF Unknown Error" },
        { OCS_SCSI_STATUS_PROTOCOL_CRC_ERROR, "Proto CRC Error" },
        { OCS_SCSI_STATUS_NO_IO, "No IO" },
        { OCS_SCSI_STATUS_ABORT_IN_PROGRESS, "Abort in Progress" },
        { OCS_SCSI_STATUS_CHECK_RESPONSE, "Check Response" },
        { OCS_SCSI_STATUS_COMMAND_TIMEOUT, "Command Timeout" },
        { OCS_SCSI_STATUS_TIMEDOUT_AND_ABORTED, "Timed out and Aborted" },
        { OCS_SCSI_STATUS_SHUTDOWN, "Shutdown" },
        { OCS_SCSI_STATUS_NEXUS_LOST, "Nexus Lost" }
};

static void ocs_action(struct cam_sim *, union ccb *);
static void ocs_poll(struct cam_sim *);

static ocs_tgt_resource_t *ocs_tgt_resource_get(ocs_fcport *,
                                        struct ccb_hdr *, uint32_t *);
static int32_t ocs_tgt_resource_abort(struct ocs_softc *, ocs_tgt_resource_t *);
static uint32_t ocs_abort_initiator_io(struct ocs_softc *ocs, union ccb *accb);
static void ocs_abort_inot(struct ocs_softc *ocs, union ccb *ccb);
static void ocs_abort_atio(struct ocs_softc *ocs, union ccb *ccb);
static int32_t ocs_target_tmf_cb(ocs_io_t *, ocs_scsi_io_status_e, uint32_t, void *);
static int32_t ocs_io_abort_cb(ocs_io_t *, ocs_scsi_io_status_e, uint32_t, void *);
static int32_t ocs_task_set_full_or_busy(ocs_io_t *io);
static int32_t ocs_initiator_tmf_cb(ocs_io_t *, ocs_scsi_io_status_e,
                ocs_scsi_cmd_resp_t *, uint32_t, void *);
static uint32_t
ocs_fcp_change_role(struct ocs_softc *ocs, ocs_fcport *fcp, uint32_t new_role);

static void ocs_ldt(void *arg);
static void ocs_ldt_task(void *arg, int pending);
static void ocs_delete_target(ocs_t *ocs, ocs_fcport *fcp, int tgt);
uint32_t ocs_add_new_tgt(ocs_node_t *node, ocs_fcport *fcp);
uint32_t ocs_update_tgt(ocs_node_t *node, ocs_fcport *fcp, uint32_t tgt_id);

int32_t ocs_tgt_find(ocs_fcport *fcp, ocs_node_t *node);

static inline ocs_io_t *ocs_scsi_find_io(struct ocs_softc *ocs, uint32_t tag)
{

        return ocs_io_get_instance(ocs, tag);
}

static inline void ocs_target_io_free(ocs_io_t *io)
{
        io->tgt_io.state = OCS_CAM_IO_FREE;
        io->tgt_io.flags = 0;
        io->tgt_io.app = NULL;
        ocs_scsi_io_complete(io);
        if(io->ocs->io_in_use != 0)
                atomic_subtract_acq_32(&io->ocs->io_in_use, 1);
}

static int32_t
ocs_attach_port(ocs_t *ocs, int chan)
{

        struct cam_sim  *sim = NULL;
        struct cam_path *path = NULL;
        uint32_t        max_io = ocs_scsi_get_property(ocs, OCS_SCSI_MAX_IOS);
        ocs_fcport *fcp = FCPORT(ocs, chan);

        if (NULL == (sim = cam_sim_alloc(ocs_action, ocs_poll, 
                                device_get_name(ocs->dev), ocs, 
                                device_get_unit(ocs->dev), &ocs->sim_lock,
                                max_io, max_io, ocs->devq))) {
                device_printf(ocs->dev, "Can't allocate SIM\n");
                return 1;
        }

        mtx_lock(&ocs->sim_lock);
        if (CAM_SUCCESS != xpt_bus_register(sim, ocs->dev, chan)) {
                device_printf(ocs->dev, "Can't register bus %d\n", 0);
                mtx_unlock(&ocs->sim_lock);
                cam_sim_free(sim, FALSE);
                return 1;
        }
        mtx_unlock(&ocs->sim_lock);

        if (CAM_REQ_CMP != xpt_create_path(&path, NULL, cam_sim_path(sim),
                                CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)) {
                device_printf(ocs->dev, "Can't create path\n");
                xpt_bus_deregister(cam_sim_path(sim));
                mtx_unlock(&ocs->sim_lock);
                cam_sim_free(sim, FALSE);
                return 1;
        }

        fcp->ocs = ocs;
        fcp->sim  = sim;
        fcp->path = path;

        callout_init_mtx(&fcp->ldt, &ocs->sim_lock, 0);
        TASK_INIT(&fcp->ltask, 1, ocs_ldt_task, fcp);

        return 0;
}

static int32_t
ocs_detach_port(ocs_t *ocs, int32_t chan)
{
        ocs_fcport *fcp = NULL;
        struct cam_sim  *sim = NULL;
        struct cam_path *path = NULL;
        fcp = FCPORT(ocs, chan);

        sim = fcp->sim;
        path = fcp->path;

        callout_drain(&fcp->ldt);
        ocs_ldt_task(fcp, 0);   

        if (fcp->sim) {
                mtx_lock(&ocs->sim_lock);
                        ocs_tgt_resource_abort(ocs, &fcp->targ_rsrc_wildcard);
                        if (path) {
                                xpt_async(AC_LOST_DEVICE, path, NULL);
                                xpt_free_path(path);
                                fcp->path = NULL;
                        }
                        xpt_bus_deregister(cam_sim_path(sim));

                        cam_sim_free(sim, FALSE);
                        fcp->sim = NULL;
                mtx_unlock(&ocs->sim_lock);
        }

        return 0;
}

int32_t
ocs_cam_attach(ocs_t *ocs)
{
        struct cam_devq *devq = NULL;
        int     i = 0;
        uint32_t        max_io = ocs_scsi_get_property(ocs, OCS_SCSI_MAX_IOS);

        if (NULL == (devq = cam_simq_alloc(max_io))) {
                device_printf(ocs->dev, "Can't allocate SIMQ\n");
                return -1;
        }

        ocs->devq = devq;

        if (mtx_initialized(&ocs->sim_lock) == 0) {
                mtx_init(&ocs->sim_lock, "ocs_sim_lock", NULL, MTX_DEF);
        }

        for (i = 0; i < (ocs->num_vports + 1); i++) {
                if (ocs_attach_port(ocs, i)) {
                        ocs_log_err(ocs, "Attach port failed for chan: %d\n", i);
                        goto detach_port;
                }
        }

        ocs->io_high_watermark = max_io;
        ocs->io_in_use = 0;
        return 0;

detach_port:
        while (--i >= 0) {
                ocs_detach_port(ocs, i);
        }

        cam_simq_free(ocs->devq);

        if (mtx_initialized(&ocs->sim_lock))
                mtx_destroy(&ocs->sim_lock);

        return 1;       
}

int32_t
ocs_cam_detach(ocs_t *ocs)
{
        int i = 0;

        for (i = (ocs->num_vports); i >= 0; i--) {
                ocs_detach_port(ocs, i);
        }

        cam_simq_free(ocs->devq);

        if (mtx_initialized(&ocs->sim_lock))
                mtx_destroy(&ocs->sim_lock);

        return 0;
}

/***************************************************************************
 * Functions required by SCSI base driver API
 */

/**
 * @ingroup scsi_api_target
 * @brief Attach driver to the BSD SCSI layer (a.k.a CAM)
 *
 * Allocates + initializes CAM related resources and attaches to the CAM
 *
 * @param ocs the driver instance's software context
 *
 * @return 0 on success, non-zero otherwise
 */
int32_t
ocs_scsi_tgt_new_device(ocs_t *ocs)
{
        ocs->enable_task_set_full = ocs_scsi_get_property(ocs, 
                                        OCS_SCSI_ENABLE_TASK_SET_FULL);
        ocs_log_debug(ocs, "task set full processing is %s\n",
                ocs->enable_task_set_full ? "enabled" : "disabled");

        return 0;
}

/**
 * @ingroup scsi_api_target
 * @brief Tears down target members of ocs structure.
 *
 * Called by OS code when device is removed.
 *
 * @param ocs pointer to ocs
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_tgt_del_device(ocs_t *ocs)
{

        return 0;
}

/**
 * @ingroup scsi_api_target
 * @brief accept new domain notification
 *
 * Called by base drive when new domain is discovered.  A target-server
 * will use this call to prepare for new remote node notifications
 * arising from ocs_scsi_new_initiator().
 *
 * The domain context has an element <b>ocs_scsi_tgt_domain_t tgt_domain</b> 
 * which is declared by the target-server code and is used for target-server 
 * private data.
 *
 * This function will only be called if the base-driver has been enabled for 
 * target capability.
 *
 * Note that this call is made to target-server backends, 
 * the ocs_scsi_ini_new_domain() function is called to initiator-client backends.
 *
 * @param domain pointer to domain
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_tgt_new_domain(ocs_domain_t *domain)
{
        return 0;
}

/**
 * @ingroup scsi_api_target
 * @brief accept domain lost notification
 *
 * Called by base-driver when a domain goes away.  A target-server will
 * use this call to clean up all domain scoped resources.
 *
 * Note that this call is made to target-server backends,
 * the ocs_scsi_ini_del_domain() function is called to initiator-client backends.
 *
 * @param domain pointer to domain
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
void
ocs_scsi_tgt_del_domain(ocs_domain_t *domain)
{
}

/**
 * @ingroup scsi_api_target
 * @brief accept new sli port (sport) notification
 *
 * Called by base drive when new sport is discovered.  A target-server
 * will use this call to prepare for new remote node notifications
 * arising from ocs_scsi_new_initiator().
 *
 * The domain context has an element <b>ocs_scsi_tgt_sport_t tgt_sport</b> 
 * which is declared by the target-server code and is used for
 * target-server private data.
 *
 * This function will only be called if the base-driver has been enabled for 
 * target capability.
 *
 * Note that this call is made to target-server backends,
 * the ocs_scsi_tgt_new_domain() is called to initiator-client backends.
 *
 * @param sport pointer to SLI port
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_tgt_new_sport(ocs_sport_t *sport)
{
        ocs_t *ocs = sport->ocs;

        if(!sport->is_vport) {
                sport->tgt_data = FCPORT(ocs, 0);
        }

        return 0;
}

/**
 * @ingroup scsi_api_target
 * @brief accept SLI port gone notification
 *
 * Called by base-driver when a sport goes away.  A target-server will
 * use this call to clean up all sport scoped resources.
 *
 * Note that this call is made to target-server backends,
 * the ocs_scsi_ini_del_sport() is called to initiator-client backends.
 *
 * @param sport pointer to SLI port
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
void
ocs_scsi_tgt_del_sport(ocs_sport_t *sport)
{
        return;
}

/**
 * @ingroup scsi_api_target
 * @brief receive notification of a new SCSI initiator node
 *
 * Sent by base driver to notify a target-server of the presense of a new
 * remote initiator.   The target-server may use this call to prepare for
 * inbound IO from this node.
 *
 * The ocs_node_t structure has and elment of type ocs_scsi_tgt_node_t named
 * tgt_node that is declared and used by a target-server for private
 * information.
 *
 * This function is only called if the target capability is enabled in driver.
 *
 * @param node pointer to new remote initiator node
 *
 * @return returns 0 for success, a negative error code value for failure.
 *
 * @note
 */
int32_t
ocs_scsi_new_initiator(ocs_node_t *node)
{
        ocs_t   *ocs = node->ocs;
        struct ac_contract ac;
        struct ac_device_changed *adc;

        ocs_fcport      *fcp = NULL;

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                ocs_log_err(ocs, "FCP is NULL \n");
                return 1;
        }       

        /*
         * Update the IO watermark by decrementing it by the
         * number of IOs reserved for each initiator.
         */
        atomic_subtract_acq_32(&ocs->io_high_watermark, OCS_RSVD_INI_IO);

        ac.contract_number = AC_CONTRACT_DEV_CHG;
        adc = (struct ac_device_changed *) ac.contract_data;
        adc->wwpn = ocs_node_get_wwpn(node);
        adc->port = node->rnode.fc_id;
        adc->target = node->instance_index;
        adc->arrived = 1;
        xpt_async(AC_CONTRACT, fcp->path, &ac);

        return 0;
}

/**
 * @ingroup scsi_api_target
 * @brief validate new initiator
 *
 * Sent by base driver to validate a remote initiatiator.   The target-server
 * returns TRUE if this initiator should be accepted.
 *
 * This function is only called if the target capability is enabled in driver.
 *
 * @param node pointer to remote initiator node to validate
 *
 * @return TRUE if initiator should be accepted, FALSE if it should be rejected
 *
 * @note
 */

int32_t
ocs_scsi_validate_initiator(ocs_node_t *node)
{
        return 1;
}

/**
 * @ingroup scsi_api_target
 * @brief Delete a SCSI initiator node
 *
 * Sent by base driver to notify a target-server that a remote initiator
 * is now gone. The base driver will have terminated all outstanding IOs 
 * and the target-server will receive appropriate completions.
 *
 * This function is only called if the base driver is enabled for
 * target capability.
 *
 * @param node pointer node being deleted
 * @param reason Reason why initiator is gone.
 *
 * @return OCS_SCSI_CALL_COMPLETE to indicate that all work was completed
 *
 * @note
 */
int32_t
ocs_scsi_del_initiator(ocs_node_t *node, ocs_scsi_del_initiator_reason_e reason)
{
        ocs_t   *ocs = node->ocs;

        struct ac_contract ac;
        struct ac_device_changed *adc;
        ocs_fcport      *fcp = NULL;

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                ocs_log_err(ocs, "FCP is NULL \n");
                return 1;
        }

        ac.contract_number = AC_CONTRACT_DEV_CHG;
        adc = (struct ac_device_changed *) ac.contract_data;
        adc->wwpn = ocs_node_get_wwpn(node);
        adc->port = node->rnode.fc_id;
        adc->target = node->instance_index;
        adc->arrived = 0;
        xpt_async(AC_CONTRACT, fcp->path, &ac);

        if (reason == OCS_SCSI_INITIATOR_MISSING) {
                return OCS_SCSI_CALL_COMPLETE;
        }

        /*
         * Update the IO watermark by incrementing it by the
         * number of IOs reserved for each initiator.
         */
        atomic_add_acq_32(&ocs->io_high_watermark, OCS_RSVD_INI_IO);

        return OCS_SCSI_CALL_COMPLETE;
}

/**
 * @ingroup scsi_api_target
 * @brief receive FCP SCSI Command
 *
 * Called by the base driver when a new SCSI command has been received.   The
 * target-server will process the command, and issue data and/or response phase
 * requests to the base driver.
 *
 * The IO context (ocs_io_t) structure has and element of type 
 * ocs_scsi_tgt_io_t named tgt_io that is declared and used by 
 * a target-server for private information.
 *
 * @param io pointer to IO context
 * @param lun LUN for this IO
 * @param cdb pointer to SCSI CDB
 * @param cdb_len length of CDB in bytes
 * @param flags command flags
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t ocs_scsi_recv_cmd(ocs_io_t *io, uint64_t lun, uint8_t *cdb,
                                uint32_t cdb_len, uint32_t flags)
{
        ocs_t *ocs = io->ocs;
        struct ccb_accept_tio *atio = NULL;
        ocs_node_t      *node = io->node;
        ocs_tgt_resource_t *trsrc = NULL;
        int32_t         rc = -1;
        ocs_fcport      *fcp = NULL;

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                ocs_log_err(ocs, "FCP is NULL \n");
                return 1;
        }

        atomic_add_acq_32(&ocs->io_in_use, 1);

        /* set target io timeout */
        io->timeout = ocs->target_io_timer_sec;

        if (ocs->enable_task_set_full && 
                (ocs->io_in_use >= ocs->io_high_watermark)) {
                return ocs_task_set_full_or_busy(io);
        } else {
                atomic_store_rel_32(&io->node->tgt_node.busy_sent, FALSE);
        }

        if ((lun < OCS_MAX_LUN) && fcp->targ_rsrc[lun].enabled) {
                trsrc = &fcp->targ_rsrc[lun];
        } else if (fcp->targ_rsrc_wildcard.enabled) {
                trsrc = &fcp->targ_rsrc_wildcard;
        }

        if (trsrc) {
                atio = (struct ccb_accept_tio *)STAILQ_FIRST(&trsrc->atio);
        }

        if (atio) {
                STAILQ_REMOVE_HEAD(&trsrc->atio, sim_links.stqe);

                atio->ccb_h.status = CAM_CDB_RECVD;
                atio->ccb_h.target_lun = lun;
                atio->sense_len = 0;

                atio->init_id = node->instance_index;
                atio->tag_id = io->tag;
                atio->ccb_h.ccb_io_ptr = io;

                if (flags & OCS_SCSI_CMD_SIMPLE)
                        atio->tag_action = MSG_SIMPLE_Q_TAG;
                else if (flags & OCS_SCSI_CMD_HEAD_OF_QUEUE)
                        atio->tag_action = MSG_HEAD_OF_Q_TAG;
                else if (flags & OCS_SCSI_CMD_ORDERED)
                        atio->tag_action = MSG_ORDERED_Q_TAG;
                else if (flags & OCS_SCSI_CMD_ACA)
                        atio->tag_action = MSG_ACA_TASK;
                else
                        atio->tag_action = CAM_TAG_ACTION_NONE;
                atio->priority = (flags & OCS_SCSI_PRIORITY_MASK) >>
                    OCS_SCSI_PRIORITY_SHIFT;

                atio->cdb_len = cdb_len;
                ocs_memcpy(atio->cdb_io.cdb_bytes, cdb, cdb_len);

                io->tgt_io.flags = 0;
                io->tgt_io.state = OCS_CAM_IO_COMMAND;
                io->tgt_io.lun = lun;

                xpt_done((union ccb *)atio);

                rc = 0;
        } else {
                device_printf(
                        ocs->dev, "%s: no ATIO for LUN %lx (en=%s) OX_ID %#x\n",
                        __func__, (unsigned long)lun,
                        trsrc ? (trsrc->enabled ? "T" : "F") : "X",
                        be16toh(io->init_task_tag));

                io->tgt_io.state = OCS_CAM_IO_MAX;
                ocs_target_io_free(io);
        }

        return rc;
}

/**
 * @ingroup scsi_api_target
 * @brief receive FCP SCSI Command with first burst data.
 *
 * Receive a new FCP SCSI command from the base driver with first burst data.
 *
 * @param io pointer to IO context
 * @param lun LUN for this IO
 * @param cdb pointer to SCSI CDB
 * @param cdb_len length of CDB in bytes
 * @param flags command flags
 * @param first_burst_buffers first burst buffers
 * @param first_burst_buffer_count The number of bytes received in the first burst
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t ocs_scsi_recv_cmd_first_burst(ocs_io_t *io, uint64_t lun, uint8_t *cdb,
                                        uint32_t cdb_len, uint32_t flags, 
                                        ocs_dma_t first_burst_buffers[], 
                                        uint32_t first_burst_buffer_count)
{
        return -1;
}

/**
 * @ingroup scsi_api_target
 * @brief receive a TMF command IO
 *
 * Called by the base driver when a SCSI TMF command has been received.   The
 * target-server will process the command, aborting commands as needed, and post
 * a response using ocs_scsi_send_resp()
 *
 * The IO context (ocs_io_t) structure has and element of type ocs_scsi_tgt_io_t named
 * tgt_io that is declared and used by a target-server for private information.
 *
 * If the target-server walks the nodes active_ios linked list, and starts IO
 * abort processing, the code <b>must</b> be sure not to abort the IO passed into the
 * ocs_scsi_recv_tmf() command.
 *
 * @param tmfio pointer to IO context
 * @param lun logical unit value
 * @param cmd command request
 * @param abortio pointer to IO object to abort for TASK_ABORT (NULL for all other TMF)
 * @param flags flags
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t ocs_scsi_recv_tmf(ocs_io_t *tmfio, uint64_t lun, ocs_scsi_tmf_cmd_e cmd,
                                ocs_io_t *abortio, uint32_t flags)
{
        ocs_t *ocs = tmfio->ocs;
        ocs_node_t *node = tmfio->node;
        ocs_tgt_resource_t *trsrc = NULL;
        struct ccb_immediate_notify *inot = NULL;
        int32_t         rc = -1;
        ocs_fcport      *fcp = NULL;

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                ocs_log_err(ocs, "FCP is NULL \n");
                return 1;
        }

        if ((lun < OCS_MAX_LUN) && fcp->targ_rsrc[lun].enabled) {
                trsrc = &fcp->targ_rsrc[lun];
        } else if (fcp->targ_rsrc_wildcard.enabled) {
                trsrc = &fcp->targ_rsrc_wildcard;
        }

        device_printf(tmfio->ocs->dev, "%s: io=%u(index) cmd=%#x LU=%lx en=%s\n",
                        __func__, tmfio->instance_index, cmd, (unsigned long)lun,
                        trsrc ? (trsrc->enabled ? "T" : "F") : "X");
        if (trsrc) {
                inot = (struct ccb_immediate_notify *)STAILQ_FIRST(&trsrc->inot);
        }

        if (!inot) {
                device_printf(
                        ocs->dev, "%s: no INOT for LUN %llx (en=%s) OX_ID %#x\n",
                        __func__, (unsigned long long)lun, trsrc ? (trsrc->enabled ? "T" : "F") : "X",
                        be16toh(tmfio->init_task_tag));

                if (abortio) {
                        ocs_scsi_io_complete(abortio);
                }
                ocs_scsi_io_complete(tmfio);
                goto ocs_scsi_recv_tmf_out;
        }

        tmfio->tgt_io.app = abortio;

        STAILQ_REMOVE_HEAD(&trsrc->inot, sim_links.stqe);

        inot->tag_id = tmfio->tag;
        inot->seq_id = tmfio->tag;

        if ((lun < OCS_MAX_LUN) && fcp->targ_rsrc[lun].enabled) {
                inot->initiator_id = node->instance_index;
        } else {
                inot->initiator_id = CAM_TARGET_WILDCARD;
        } 

        inot->ccb_h.status = CAM_MESSAGE_RECV;
        inot->ccb_h.target_lun = lun;

        switch (cmd) {
        case OCS_SCSI_TMF_ABORT_TASK:
                inot->arg = MSG_ABORT_TASK;
                inot->seq_id = abortio->tag;
                device_printf(ocs->dev, "%s: ABTS IO.%#x st=%#x\n", 
                        __func__, abortio->tag, abortio->tgt_io.state);
                abortio->tgt_io.flags |= OCS_CAM_IO_F_ABORT_RECV;
                abortio->tgt_io.flags |= OCS_CAM_IO_F_ABORT_NOTIFY;
                break;
        case OCS_SCSI_TMF_QUERY_TASK_SET:
                device_printf(ocs->dev, 
                        "%s: OCS_SCSI_TMF_QUERY_TASK_SET not supported\n",
                                __func__);
                STAILQ_INSERT_TAIL(&trsrc->inot, &inot->ccb_h, sim_links.stqe);
                ocs_scsi_io_complete(tmfio);
                goto ocs_scsi_recv_tmf_out;
                break;
        case OCS_SCSI_TMF_ABORT_TASK_SET:
                inot->arg = MSG_ABORT_TASK_SET;
                break;
        case OCS_SCSI_TMF_CLEAR_TASK_SET:
                inot->arg = MSG_CLEAR_TASK_SET;
                break;
        case OCS_SCSI_TMF_QUERY_ASYNCHRONOUS_EVENT:
                inot->arg = MSG_QUERY_ASYNC_EVENT;
                break;
        case OCS_SCSI_TMF_LOGICAL_UNIT_RESET:
                inot->arg = MSG_LOGICAL_UNIT_RESET;
                break;
        case OCS_SCSI_TMF_CLEAR_ACA:
                inot->arg = MSG_CLEAR_ACA;
                break;
        case OCS_SCSI_TMF_TARGET_RESET:
                inot->arg = MSG_TARGET_RESET;
                break;
        default:
                device_printf(ocs->dev, "%s: unsupported TMF %#x\n",
                                                         __func__, cmd);
                STAILQ_INSERT_TAIL(&trsrc->inot, &inot->ccb_h, sim_links.stqe);
                goto ocs_scsi_recv_tmf_out;
        }

        rc = 0;

        xpt_print(inot->ccb_h.path, "%s: func=%#x stat=%#x id=%#x lun=%#x"
                        " flags=%#x tag=%#x seq=%#x ini=%#x arg=%#x\n", 
                        __func__, inot->ccb_h.func_code, inot->ccb_h.status,
                        inot->ccb_h.target_id, 
                        (unsigned int)inot->ccb_h.target_lun, inot->ccb_h.flags,
                        inot->tag_id, inot->seq_id, inot->initiator_id,
                        inot->arg);
        xpt_done((union ccb *)inot);

        if (abortio) {
                abortio->tgt_io.flags |= OCS_CAM_IO_F_ABORT_DEV;
                rc = ocs_scsi_tgt_abort_io(abortio, ocs_io_abort_cb, tmfio);
        }

ocs_scsi_recv_tmf_out:
        return rc;
}

/**
 * @ingroup scsi_api_initiator
 * @brief Initializes any initiator fields on the ocs structure.
 *
 * Called by OS initialization code when a new device is discovered.
 *
 * @param ocs pointer to ocs
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_ini_new_device(ocs_t *ocs)
{

        return 0;
}

/**
 * @ingroup scsi_api_initiator
 * @brief Tears down initiator members of ocs structure.
 *
 * Called by OS code when device is removed.
 *
 * @param ocs pointer to ocs
 *
 * @return returns 0 for success, a negative error code value for failure.
 */

int32_t
ocs_scsi_ini_del_device(ocs_t *ocs)
{

        return 0;
}

/**
 * @ingroup scsi_api_initiator
 * @brief accept new domain notification
 *
 * Called by base drive when new domain is discovered.  An initiator-client
 * will accept this call to prepare for new remote node notifications
 * arising from ocs_scsi_new_target().
 *
 * The domain context has the element <b>ocs_scsi_ini_domain_t ini_domain</b>
 * which is declared by the initiator-client code and is used for 
 * initiator-client private data.
 *
 * This function will only be called if the base-driver has been enabled for 
 * initiator capability.
 *
 * Note that this call is made to initiator-client backends, 
 * the ocs_scsi_tgt_new_domain() function is called to target-server backends.
 *
 * @param domain pointer to domain
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_ini_new_domain(ocs_domain_t *domain)
{
        return 0;
}

/**
 * @ingroup scsi_api_initiator
 * @brief accept domain lost notification
 *
 * Called by base-driver when a domain goes away.  An initiator-client will
 * use this call to clean up all domain scoped resources.
 *
 * This function will only be called if the base-driver has been enabled for
 * initiator capability.
 *
 * Note that this call is made to initiator-client backends,
 * the ocs_scsi_tgt_del_domain() function is called to target-server backends.
 *
 * @param domain pointer to domain
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
void
ocs_scsi_ini_del_domain(ocs_domain_t *domain)
{
}

/**
 * @ingroup scsi_api_initiator
 * @brief accept new sli port notification
 *
 * Called by base drive when new sli port (sport) is discovered.
 * A target-server will use this call to prepare for new remote node
 * notifications arising from ocs_scsi_new_initiator().
 *
 * This function will only be called if the base-driver has been enabled for
 * target capability.
 *
 * Note that this call is made to target-server backends,
 * the ocs_scsi_ini_new_sport() function is called to initiator-client backends.
 *
 * @param sport pointer to sport
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_ini_new_sport(ocs_sport_t *sport)
{
        ocs_t *ocs = sport->ocs;
        ocs_fcport *fcp = FCPORT(ocs, 0);

        if (!sport->is_vport) {
                sport->tgt_data = fcp;
                fcp->fc_id = sport->fc_id;      
        }

        return 0;
}

/**
 * @ingroup scsi_api_initiator
 * @brief accept sli port gone notification
 *
 * Called by base-driver when a sport goes away.  A target-server will
 * use this call to clean up all sport scoped resources.
 *
 * Note that this call is made to target-server backends,
 * the ocs_scsi_ini_del_sport() function is called to initiator-client backends.
 *
 * @param sport pointer to SLI port
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
void
ocs_scsi_ini_del_sport(ocs_sport_t *sport)
{
        ocs_t *ocs = sport->ocs;
        ocs_fcport *fcp = FCPORT(ocs, 0);

        if (!sport->is_vport) {
                fcp->fc_id = 0; 
        }
}

void 
ocs_scsi_sport_deleted(ocs_sport_t *sport)
{
        ocs_t *ocs = sport->ocs;
        ocs_fcport *fcp = NULL;

        ocs_xport_stats_t value;

        if (!sport->is_vport) {
                return;
        }

        fcp = sport->tgt_data;

        ocs_xport_status(ocs->xport, OCS_XPORT_PORT_STATUS, &value);

        if (value.value == 0) {
                ocs_log_debug(ocs, "PORT offline,.. skipping\n");
                return;
        }       

        if ((fcp->role != KNOB_ROLE_NONE)) {
                if(fcp->vport->sport != NULL) {
                        ocs_log_debug(ocs,"sport is not NULL, skipping\n");
                        return;
                }

                ocs_sport_vport_alloc(ocs->domain, fcp->vport);
                return;
        }

}

int32_t
ocs_tgt_find(ocs_fcport *fcp, ocs_node_t *node)
{
        ocs_fc_target_t *tgt = NULL;
        uint32_t i;

        for (i = 0; i < OCS_MAX_TARGETS; i++) {
                tgt = &fcp->tgt[i];

                if (tgt->state == OCS_TGT_STATE_NONE)
                        continue;
                
                if (ocs_node_get_wwpn(node) == tgt->wwpn) {
                        return i;
                }
        }

        return -1;
}

/**
 * @ingroup scsi_api_initiator
 * @brief receive notification of a new SCSI target node
 *
 * Sent by base driver to notify an initiator-client of the presense of a new
 * remote target.   The initiator-server may use this call to prepare for
 * inbound IO from this node.
 *
 * This function is only called if the base driver is enabled for
 * initiator capability.
 *
 * @param node pointer to new remote initiator node
 *
 * @return none
 *
 * @note
 */

uint32_t
ocs_update_tgt(ocs_node_t *node, ocs_fcport *fcp, uint32_t tgt_id)
{
        ocs_fc_target_t *tgt = NULL;

        tgt = &fcp->tgt[tgt_id];

        tgt->node_id = node->instance_index;
        tgt->state = OCS_TGT_STATE_VALID;

        tgt->port_id = node->rnode.fc_id;
        tgt->wwpn = ocs_node_get_wwpn(node);
        tgt->wwnn = ocs_node_get_wwnn(node);
        return 0;
}

uint32_t
ocs_add_new_tgt(ocs_node_t *node, ocs_fcport *fcp)
{
        uint32_t i;

        struct ocs_softc *ocs = node->ocs;
        union ccb *ccb = NULL;
        for (i = 0; i < OCS_MAX_TARGETS; i++) {
                if (fcp->tgt[i].state == OCS_TGT_STATE_NONE)
                        break;
        }

        if (NULL == (ccb = xpt_alloc_ccb_nowait())) {
                device_printf(ocs->dev, "%s: ccb allocation failed\n", __func__);
                return -1;
        }

        if (CAM_REQ_CMP != xpt_create_path(&ccb->ccb_h.path, xpt_periph,
                                cam_sim_path(fcp->sim),
                                i, CAM_LUN_WILDCARD)) {
                device_printf(
                        ocs->dev, "%s: target path creation failed\n", __func__);
                xpt_free_ccb(ccb);
                return -1;
        }

        ocs_update_tgt(node, fcp, i);
        xpt_rescan(ccb);
        return 0;
}

int32_t
ocs_scsi_new_target(ocs_node_t *node)
{
        ocs_fcport      *fcp = NULL;
        int32_t i;

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                printf("%s:FCP is NULL \n", __func__);
                return 0;
        }

        i = ocs_tgt_find(fcp, node);

        if (i < 0) {
                ocs_add_new_tgt(node, fcp);
                return 0;
        }

        ocs_update_tgt(node, fcp, i);
        return 0;
}

static void
ocs_delete_target(ocs_t *ocs, ocs_fcport *fcp, int tgt)
{
        struct cam_path *cpath = NULL;

        if (!fcp->sim) { 
                device_printf(ocs->dev, "%s: calling with NULL sim\n", __func__); 
                return;
        }

        if (CAM_REQ_CMP == xpt_create_path(&cpath, NULL, cam_sim_path(fcp->sim),
                                tgt, CAM_LUN_WILDCARD)) {
                xpt_async(AC_LOST_DEVICE, cpath, NULL);
                
                xpt_free_path(cpath);
        }
}

/*
 * Device Lost Timer Function- when we have decided that a device was lost,
 * we wait a specific period of time prior to telling the OS about lost device.
 *
 * This timer function gets activated when the device was lost. 
 * This function fires once a second and then scans the port database
 * for devices that are marked dead but still have a virtual target assigned.
 * We decrement a counter for that port database entry, and when it hits zero,
 * we tell the OS the device was lost. Timer will be stopped when the device
 * comes back active or removed from the OS.
 */
static void
ocs_ldt(void *arg)
{
        ocs_fcport *fcp = arg;
        taskqueue_enqueue(taskqueue_thread, &fcp->ltask);
}

static void
ocs_ldt_task(void *arg, int pending)
{
        ocs_fcport *fcp = arg;
        ocs_t   *ocs = fcp->ocs;
        int i, more_to_do = 0;
        ocs_fc_target_t *tgt = NULL;

        for (i = 0; i < OCS_MAX_TARGETS; i++) {
                tgt = &fcp->tgt[i];

                if (tgt->state != OCS_TGT_STATE_LOST) {
                        continue;
                }

                if ((tgt->gone_timer != 0) && (ocs->attached)){
                        tgt->gone_timer -= 1;
                        more_to_do++;
                        continue;
                }

                ocs_delete_target(ocs, fcp, i);

                tgt->state = OCS_TGT_STATE_NONE;
        }

        if (more_to_do) {
                callout_reset(&fcp->ldt, hz, ocs_ldt, fcp);
        } else {
                callout_deactivate(&fcp->ldt);
        }

}

/**
 * @ingroup scsi_api_initiator
 * @brief Delete a SCSI target node
 *
 * Sent by base driver to notify a initiator-client that a remote target 
 * is now gone. The base driver will have terminated all  outstanding IOs 
 * and the initiator-client will receive appropriate completions.
 *
 * The ocs_node_t structure has and elment of type ocs_scsi_ini_node_t named
 * ini_node that is declared and used by a target-server for private
 * information.
 *
 * This function is only called if the base driver is enabled for
 * initiator capability.
 *
 * @param node pointer node being deleted
 * @param reason reason for deleting the target
 *
 * @return Returns OCS_SCSI_CALL_ASYNC if target delete is queued for async 
 * completion and OCS_SCSI_CALL_COMPLETE if call completed or error.
 *
 * @note
 */
int32_t
ocs_scsi_del_target(ocs_node_t *node, ocs_scsi_del_target_reason_e reason)
{
        struct ocs_softc *ocs = node->ocs;
        ocs_fcport      *fcp = NULL;
        ocs_fc_target_t *tgt = NULL;
        int32_t tgt_id;

        if (ocs == NULL) {
                ocs_log_err(ocs,"OCS is NULL \n");
                return -1;
        }

        fcp = node->sport->tgt_data;
        if (fcp == NULL) {
                ocs_log_err(ocs,"FCP is NULL \n");
                return -1;
        }

        tgt_id = ocs_tgt_find(fcp, node);
        if (tgt_id == -1) {
                ocs_log_err(ocs,"target is invalid\n");
                return -1;
        }

        tgt = &fcp->tgt[tgt_id];

        // IF in shutdown delete target.
        if(!ocs->attached) {
                ocs_delete_target(ocs, fcp, tgt_id);
        } else {
                tgt->state = OCS_TGT_STATE_LOST;
                tgt->gone_timer = 30;
                if (!callout_active(&fcp->ldt)) {
                        callout_reset(&fcp->ldt, hz, ocs_ldt, fcp);
                }
        }

        return 0;
}

/**
 * @brief Initialize SCSI IO
 *
 * Initialize SCSI IO, this function is called once per IO during IO pool
 * allocation so that the target server may initialize any of its own private
 * data.
 *
 * @param io pointer to SCSI IO object
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_tgt_io_init(ocs_io_t *io)
{
        return 0;
}

/**
 * @brief Uninitialize SCSI IO
 *
 * Uninitialize target server private data in a SCSI io object
 *
 * @param io pointer to SCSI IO object
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_tgt_io_exit(ocs_io_t *io)
{
        return 0;
}

/**
 * @brief Initialize SCSI IO
 *
 * Initialize SCSI IO, this function is called once per IO during IO pool
 * allocation so that the initiator client may initialize any of its own private
 * data.
 *
 * @param io pointer to SCSI IO object
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_ini_io_init(ocs_io_t *io)
{
        return 0;
}

/**
 * @brief Uninitialize SCSI IO
 *
 * Uninitialize initiator client private data in a SCSI io object
 *
 * @param io pointer to SCSI IO object
 *
 * @return returns 0 for success, a negative error code value for failure.
 */
int32_t
ocs_scsi_ini_io_exit(ocs_io_t *io)
{
        return 0;
}
/*
 * End of functions required by SCSI base driver API
 ***************************************************************************/

static __inline void
ocs_set_ccb_status(union ccb *ccb, cam_status status)
{
        ccb->ccb_h.status &= ~CAM_STATUS_MASK;
        ccb->ccb_h.status |= status;
}

static int32_t
ocs_task_set_full_or_busy_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status,
                                                uint32_t flags, void *arg)
{

        ocs_target_io_free(io);

        return 0;
}

/**
 * @brief send SCSI task set full or busy status
 *
 * A SCSI task set full or busy response is sent depending on whether
 * another IO is already active on the LUN.
 *
 * @param io pointer to IO context
 *
 * @return returns 0 for success, a negative error code value for failure.
 */

static int32_t
ocs_task_set_full_or_busy(ocs_io_t *io)
{
        ocs_scsi_cmd_resp_t rsp = { 0 };
        ocs_t *ocs = io->ocs;

        /*
         * If there is another command for the LUN, then send task set full,
         * if this is the first one, then send the busy status.
         *
         * if 'busy sent' is FALSE, set it to TRUE and send BUSY
         * otherwise send FULL
         */
        if (atomic_cmpset_acq_32(&io->node->tgt_node.busy_sent, FALSE, TRUE)) {
                rsp.scsi_status = SCSI_STATUS_BUSY; /* Busy */
                printf("%s: busy [%s] tag=%x iiu=%d ihw=%d\n", __func__,
                                io->node->display_name, io->tag,
                                io->ocs->io_in_use, io->ocs->io_high_watermark);
        } else {
                rsp.scsi_status = SCSI_STATUS_TASK_SET_FULL; /* Task set full */
                printf("%s: full tag=%x iiu=%d\n", __func__, io->tag,
                        io->ocs->io_in_use);
        }

        /* Log a message here indicating a busy or task set full state */
        if (OCS_LOG_ENABLE_Q_FULL_BUSY_MSG(ocs)) {
                /* Log Task Set Full */
                if (rsp.scsi_status == SCSI_STATUS_TASK_SET_FULL) {
                        /* Task Set Full Message */
                        ocs_log_info(ocs, "OCS CAM TASK SET FULL. Tasks >= %d\n",
                                        ocs->io_high_watermark);
                }
                else if (rsp.scsi_status == SCSI_STATUS_BUSY) {
                        /* Log Busy Message */
                        ocs_log_info(ocs, "OCS CAM SCSI BUSY\n");
                }
        }

        /* Send the response */
        return 
        ocs_scsi_send_resp(io, 0, &rsp, ocs_task_set_full_or_busy_cb, NULL);
}

/**
 * @ingroup cam_io
 * @brief Process target IO completions
 *
 * @param io 
 * @param scsi_status did the IO complete successfully
 * @param flags 
 * @param arg application specific pointer provided in the call to ocs_target_io()
 *
 * @todo
 */
static int32_t ocs_scsi_target_io_cb(ocs_io_t *io, 
                                ocs_scsi_io_status_e scsi_status,
                                uint32_t flags, void *arg)
{
        union ccb *ccb = arg;
        struct ccb_scsiio *csio = &ccb->csio;
        struct ocs_softc *ocs = csio->ccb_h.ccb_ocs_ptr;
        uint32_t cam_dir = ccb->ccb_h.flags & CAM_DIR_MASK;
        uint32_t io_is_done = 
                (ccb->ccb_h.flags & CAM_SEND_STATUS) == CAM_SEND_STATUS;

        ccb->ccb_h.status &= ~CAM_SIM_QUEUED;

        if (CAM_DIR_NONE != cam_dir) {
                bus_dmasync_op_t op;

                if (CAM_DIR_IN == cam_dir) {
                        op = BUS_DMASYNC_POSTREAD;
                } else {
                        op = BUS_DMASYNC_POSTWRITE;
                }
                /* Synchronize the DMA memory with the CPU and free the mapping */
                bus_dmamap_sync(ocs->buf_dmat, io->tgt_io.dmap, op);
                if (io->tgt_io.flags & OCS_CAM_IO_F_DMAPPED) {
                        bus_dmamap_unload(ocs->buf_dmat, io->tgt_io.dmap);
                }
        }

        if (io->tgt_io.sendresp) {
                io->tgt_io.sendresp = 0;
                ocs_scsi_cmd_resp_t  resp = { 0 };
                io->tgt_io.state = OCS_CAM_IO_RESP;
                resp.scsi_status = scsi_status;
                if (ccb->ccb_h.flags & CAM_SEND_SENSE) {
                        resp.sense_data = (uint8_t *)&csio->sense_data;
                        resp.sense_data_length = csio->sense_len;
                }
                resp.residual = io->exp_xfer_len - io->transferred;

                return ocs_scsi_send_resp(io, 0, &resp, ocs_scsi_target_io_cb, ccb);
        }

        switch (scsi_status) {
        case OCS_SCSI_STATUS_GOOD:
                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                break;
        case OCS_SCSI_STATUS_ABORTED:
                ocs_set_ccb_status(ccb, CAM_REQ_ABORTED);
                break;
        default:
                ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
        }

        if (io_is_done) {
                if ((io->tgt_io.flags & OCS_CAM_IO_F_ABORT_NOTIFY) == 0) {
                        ocs_target_io_free(io);
                }
        } else {
                io->tgt_io.state = OCS_CAM_IO_DATA_DONE;
                /*device_printf(ocs->dev, "%s: CTIO state=%d tag=%#x\n",
                                __func__, io->tgt_io.state, io->tag);*/
        }

        xpt_done(ccb);

        return 0;
}

/**
 * @note        1. Since the CCB is assigned to the ocs_io_t on an XPT_CONT_TARGET_IO
 *                 action, if an initiator aborts a command prior to the SIM receiving
 *                 a CTIO, the IO's CCB will be NULL.
 */
static int32_t
ocs_io_abort_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status, uint32_t flags, void *arg)
{
        struct ocs_softc *ocs = NULL;
        ocs_io_t        *tmfio = arg;
        ocs_scsi_tmf_resp_e tmf_resp = OCS_SCSI_TMF_FUNCTION_COMPLETE;
        int32_t rc = 0;

        ocs = io->ocs;

        io->tgt_io.flags &= ~OCS_CAM_IO_F_ABORT_DEV;

        /* A good status indicates the IO was aborted and will be completed in
         * the IO's completion handler. Handle the other cases here. */
        switch (scsi_status) {
        case OCS_SCSI_STATUS_GOOD:
                break;
        case OCS_SCSI_STATUS_NO_IO:
                break;
        default:
                device_printf(ocs->dev, "%s: unhandled status %d\n",
                                __func__, scsi_status);
                tmf_resp = OCS_SCSI_TMF_FUNCTION_REJECTED;
                rc = -1;
        }

        ocs_scsi_send_tmf_resp(tmfio, tmf_resp, NULL, ocs_target_tmf_cb, NULL);

        return rc;
}

/**
 * @ingroup cam_io
 * @brief Process initiator IO completions
 *
 * @param io 
 * @param scsi_status did the IO complete successfully
 * @param rsp pointer to response buffer
 * @param flags 
 * @param arg application specific pointer provided in the call to ocs_target_io()
 *
 * @todo
 */
static int32_t ocs_scsi_initiator_io_cb(ocs_io_t *io,
                                        ocs_scsi_io_status_e scsi_status,
                                        ocs_scsi_cmd_resp_t *rsp,
                                        uint32_t flags, void *arg)
{
        union ccb *ccb = arg;
        struct ccb_scsiio *csio = &ccb->csio;
        struct ocs_softc *ocs = csio->ccb_h.ccb_ocs_ptr;
        uint32_t cam_dir = ccb->ccb_h.flags & CAM_DIR_MASK;
        cam_status ccb_status= CAM_REQ_CMP_ERR;

        if (CAM_DIR_NONE != cam_dir) {
                bus_dmasync_op_t op;

                if (CAM_DIR_IN == cam_dir) {
                        op = BUS_DMASYNC_POSTREAD;
                } else {
                        op = BUS_DMASYNC_POSTWRITE;
                }
                /* Synchronize the DMA memory with the CPU and free the mapping */
                bus_dmamap_sync(ocs->buf_dmat, io->tgt_io.dmap, op);
                if (io->tgt_io.flags & OCS_CAM_IO_F_DMAPPED) {
                        bus_dmamap_unload(ocs->buf_dmat, io->tgt_io.dmap);
                }
        }

        if (scsi_status == OCS_SCSI_STATUS_CHECK_RESPONSE) {
                csio->scsi_status = rsp->scsi_status;
                if (SCSI_STATUS_OK != rsp->scsi_status)
                        ccb_status = CAM_SCSI_STATUS_ERROR;
                else
                        ccb_status = CAM_REQ_CMP;

                csio->resid = rsp->residual;

                /*
                 * If we've already got a SCSI error, prefer that because it
                 * will have more detail.
                 */
                if ((rsp->residual < 0) && (ccb_status == CAM_REQ_CMP)) {
                        ccb_status = CAM_DATA_RUN_ERR;
                }

                if ((rsp->sense_data_length) &&
                        !(ccb->ccb_h.flags & (CAM_SENSE_PHYS | CAM_SENSE_PTR))) {
                        uint32_t        sense_len = 0;

                        ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
                        if (rsp->sense_data_length < csio->sense_len) {
                                csio->sense_resid = 
                                        csio->sense_len - rsp->sense_data_length;
                                sense_len = rsp->sense_data_length;
                        } else {
                                csio->sense_resid = 0;
                                sense_len = csio->sense_len;
                        }
                        ocs_memcpy(&csio->sense_data, rsp->sense_data, sense_len);
                }
        } else if (scsi_status != OCS_SCSI_STATUS_GOOD) {
                const char *err_desc = NULL;
                char err_str[224];
                struct sbuf sb;
                size_t i;

                sbuf_new(&sb, err_str, sizeof(err_str), 0);

                xpt_path_sbuf(ccb->ccb_h.path, &sb);

                for (i = 0; i < (sizeof(ocs_status_desc) /
                     sizeof(ocs_status_desc[0])); i++) {
                        if (scsi_status == ocs_status_desc[i].status) {
                                err_desc = ocs_status_desc[i].desc;
                                break;
                        }
                }
                if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
                        scsi_command_string(&ccb->csio, &sb);
                        sbuf_printf(&sb, "length %d ", ccb->csio.dxfer_len);
                }
                sbuf_printf(&sb, "error status %d (%s)\n", scsi_status,
                    (err_desc != NULL) ? err_desc : "Unknown");
                sbuf_finish(&sb);
                printf("%s", sbuf_data(&sb));

                switch (scsi_status) {
                case OCS_SCSI_STATUS_ABORTED:
                case OCS_SCSI_STATUS_ABORT_IN_PROGRESS:
                        ccb_status = CAM_REQ_ABORTED;
                        break;
                case OCS_SCSI_STATUS_DIF_GUARD_ERROR:
                case OCS_SCSI_STATUS_DIF_REF_TAG_ERROR:
                case OCS_SCSI_STATUS_DIF_APP_TAG_ERROR:
                case OCS_SCSI_STATUS_DIF_UNKNOWN_ERROR:
                case OCS_SCSI_STATUS_PROTOCOL_CRC_ERROR:
                        ccb_status = CAM_IDE;
                        break;
                case OCS_SCSI_STATUS_ERROR:
                case OCS_SCSI_STATUS_NO_IO:
                        ccb_status = CAM_REQ_CMP_ERR;
                        break;
                case OCS_SCSI_STATUS_COMMAND_TIMEOUT:
                case OCS_SCSI_STATUS_TIMEDOUT_AND_ABORTED:
                        ccb_status = CAM_CMD_TIMEOUT;
                        break;
                case OCS_SCSI_STATUS_SHUTDOWN:
                case OCS_SCSI_STATUS_NEXUS_LOST:
                        ccb_status = CAM_SCSI_IT_NEXUS_LOST;
                        break;
                default:
                        ccb_status = CAM_REQ_CMP_ERR;
                        break;
                }

        } else {
                ccb_status = CAM_REQ_CMP;
        }

        ocs_set_ccb_status(ccb, ccb_status);

        ocs_scsi_io_free(io);

        csio->ccb_h.ccb_io_ptr = NULL;
        csio->ccb_h.ccb_ocs_ptr = NULL;

        ccb->ccb_h.status &= ~CAM_SIM_QUEUED;

        if ((ccb_status != CAM_REQ_CMP) &&
            ((ccb->ccb_h.status & CAM_DEV_QFRZN) == 0)) {
                ccb->ccb_h.status |= CAM_DEV_QFRZN;
                xpt_freeze_devq(ccb->ccb_h.path, 1);
        }

        xpt_done(ccb);

        return 0;
}

/**
 * @brief Load scatter-gather list entries into an IO
 *
 * This routine relies on the driver instance's software context pointer and
 * the IO object pointer having been already assigned to hooks in the CCB.
 * Although the routine does not return success/fail, callers can look at the
 * n_sge member to determine if the mapping failed (0 on failure).
 *
 * @param arg pointer to the CAM ccb for this IO
 * @param seg DMA address/length pairs
 * @param nseg number of DMA address/length pairs
 * @param error any errors while mapping the IO
 */
static void
ocs_scsi_dmamap_load(void *arg, bus_dma_segment_t *seg, int nseg, int error)
{
        ocs_dmamap_load_arg_t *sglarg = (ocs_dmamap_load_arg_t*) arg;

        if (error) {
                printf("%s: seg=%p nseg=%d error=%d\n",
                                __func__, seg, nseg, error);
                sglarg->rc = -1;
        } else {
                uint32_t i = 0;
                uint32_t c = 0;

                if ((sglarg->sgl_count + nseg) > sglarg->sgl_max) {
                        printf("%s: sgl_count=%d nseg=%d max=%d\n", __func__,
                                sglarg->sgl_count, nseg, sglarg->sgl_max);
                        sglarg->rc = -2;
                        return;
                }

                for (i = 0, c = sglarg->sgl_count; i < nseg; i++, c++) {
                        sglarg->sgl[c].addr = seg[i].ds_addr;
                        sglarg->sgl[c].len  = seg[i].ds_len;
                }

                sglarg->sgl_count = c;

                sglarg->rc = 0;
        }
}

/**
 * @brief Build a scatter-gather list from a CAM CCB
 *
 * @param ocs the driver instance's software context
 * @param ccb pointer to the CCB
 * @param io pointer to the previously allocated IO object
 * @param sgl pointer to SGL
 * @param sgl_max number of entries in sgl
 *
 * @return 0 on success, non-zero otherwise
 */
static int32_t
ocs_build_scsi_sgl(struct ocs_softc *ocs, union ccb *ccb, ocs_io_t *io,
                ocs_scsi_sgl_t *sgl, uint32_t sgl_max)
{
        ocs_dmamap_load_arg_t dmaarg;
        int32_t err = 0;

        if (!ocs || !ccb || !io || !sgl) {
                printf("%s: bad param o=%p c=%p i=%p s=%p\n", __func__,
                                ocs, ccb, io, sgl);
                return -1;
        }

        io->tgt_io.flags &= ~OCS_CAM_IO_F_DMAPPED;

        dmaarg.sgl = sgl;
        dmaarg.sgl_count = 0;
        dmaarg.sgl_max = sgl_max;
        dmaarg.rc = 0;

        err = bus_dmamap_load_ccb(ocs->buf_dmat, io->tgt_io.dmap, ccb,
                        ocs_scsi_dmamap_load, &dmaarg, 0);

        if (err || dmaarg.rc) {
                device_printf(
                        ocs->dev, "%s: bus_dmamap_load_ccb error (%d %d)\n",
                                __func__, err, dmaarg.rc);
                return -1;
        }

        io->tgt_io.flags |= OCS_CAM_IO_F_DMAPPED;
        return dmaarg.sgl_count;
}

/**
 * @ingroup cam_io
 * @brief Send a target IO
 *
 * @param ocs the driver instance's software context
 * @param ccb pointer to the CCB
 *
 * @return 0 on success, non-zero otherwise
 */
static int32_t
ocs_target_io(struct ocs_softc *ocs, union ccb *ccb)
{
        struct ccb_scsiio *csio = &ccb->csio;
        ocs_io_t *io = NULL;
        uint32_t cam_dir = ccb->ccb_h.flags & CAM_DIR_MASK;
        bool sendstatus = ccb->ccb_h.flags & CAM_SEND_STATUS;
        uint32_t xferlen = csio->dxfer_len;
        int32_t rc = 0;

        io = ocs_scsi_find_io(ocs, csio->tag_id);
        if (io == NULL) {
                ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                panic("bad tag value");
                return 1;
        }

        /* Received an ABORT TASK for this IO */
        if (io->tgt_io.flags & OCS_CAM_IO_F_ABORT_RECV) {
                /*device_printf(ocs->dev,
                        "%s: XPT_CONT_TARGET_IO state=%d tag=%#x xid=%#x flags=%#x\n",
                        __func__, io->tgt_io.state, io->tag, io->init_task_tag,
                        io->tgt_io.flags);*/
                io->tgt_io.flags |= OCS_CAM_IO_F_ABORT_CAM;

                if (ccb->ccb_h.flags & CAM_SEND_STATUS) {
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                        ocs_target_io_free(io);
                        return 1;
                } 

                ocs_set_ccb_status(ccb, CAM_REQ_ABORTED);

                return 1;
        }

        io->tgt_io.app = ccb;

        ocs_set_ccb_status(ccb, CAM_REQ_INPROG);
        ccb->ccb_h.status |= CAM_SIM_QUEUED;

        csio->ccb_h.ccb_ocs_ptr = ocs;
        csio->ccb_h.ccb_io_ptr  = io;

        if ((sendstatus && (xferlen == 0))) {
                ocs_scsi_cmd_resp_t     resp = { 0 };

                ocs_assert(ccb->ccb_h.flags & CAM_SEND_STATUS, -1);

                io->tgt_io.state = OCS_CAM_IO_RESP;

                resp.scsi_status = csio->scsi_status;

                if (ccb->ccb_h.flags & CAM_SEND_SENSE) {
                        resp.sense_data = (uint8_t *)&csio->sense_data;
                        resp.sense_data_length = csio->sense_len;
                }

                resp.residual = io->exp_xfer_len - io->transferred;
                rc = ocs_scsi_send_resp(io, 0, &resp, ocs_scsi_target_io_cb, ccb);

        } else if (xferlen != 0) {
                ocs_scsi_sgl_t *sgl;
                int32_t sgl_count = 0;

                io->tgt_io.state = OCS_CAM_IO_DATA;
                
                if (sendstatus)
                        io->tgt_io.sendresp = 1;

                sgl = io->sgl;

                sgl_count = ocs_build_scsi_sgl(ocs, ccb, io, sgl, io->sgl_allocated);
                if (sgl_count > 0) {
                        if (cam_dir == CAM_DIR_IN) {
                                rc = ocs_scsi_send_rd_data(io, 0, NULL, sgl,
                                                sgl_count, csio->dxfer_len,
                                                ocs_scsi_target_io_cb, ccb);
                        } else if (cam_dir == CAM_DIR_OUT) {
                                rc = ocs_scsi_recv_wr_data(io, 0, NULL, sgl,
                                                sgl_count, csio->dxfer_len,
                                                ocs_scsi_target_io_cb, ccb);
                        } else {
                                device_printf(ocs->dev, "%s:"
                                                " unknown CAM direction %#x\n",
                                                __func__, cam_dir);
                                ocs_set_ccb_status(ccb, CAM_REQ_INVALID);
                                rc = 1;
                        }
                } else {
                        device_printf(ocs->dev, "%s: building SGL failed\n",
                                                __func__);
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                        rc = 1;
                }
        } else {
                device_printf(ocs->dev, "%s: Wrong value xfer and sendstatus"
                                        " are 0 \n", __func__);
                ocs_set_ccb_status(ccb, CAM_REQ_INVALID);
                rc = 1;
        }

        if (rc) {
                ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
                io->tgt_io.state = OCS_CAM_IO_DATA_DONE;
                device_printf(ocs->dev, "%s: CTIO state=%d tag=%#x\n",
                                __func__, io->tgt_io.state, io->tag);
        if ((sendstatus && (xferlen == 0))) {
                        ocs_target_io_free(io);
                }
        }

        return rc;
}

static int32_t
ocs_target_tmf_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status, uint32_t flags,
                void *arg)
{

        /*device_printf(io->ocs->dev, "%s: tag=%x io=%p s=%#x\n",
                         __func__, io->tag, io, scsi_status);*/
        ocs_scsi_io_complete(io);

        return 0;
}

/**
 * @ingroup cam_io
 * @brief Send an initiator IO
 *
 * @param ocs the driver instance's software context
 * @param ccb pointer to the CCB
 *
 * @return 0 on success, non-zero otherwise
 */
static int32_t
ocs_initiator_io(struct ocs_softc *ocs, union ccb *ccb)
{
        int32_t rc;
        struct ccb_scsiio *csio = &ccb->csio;
        struct ccb_hdr *ccb_h = &csio->ccb_h;
        ocs_node_t *node = NULL;
        ocs_io_t *io = NULL;
        ocs_scsi_sgl_t *sgl;
        int32_t flags, sgl_count;
        ocs_fcport      *fcp;

        fcp = FCPORT(ocs, cam_sim_bus(xpt_path_sim((ccb)->ccb_h.path)));

        if (fcp->tgt[ccb_h->target_id].state == OCS_TGT_STATE_LOST) {
                device_printf(ocs->dev, "%s: device LOST %d\n", __func__,
                                                        ccb_h->target_id);
                return CAM_REQUEUE_REQ;
        }

        if (fcp->tgt[ccb_h->target_id].state == OCS_TGT_STATE_NONE) {
                device_printf(ocs->dev, "%s: device not ready %d\n", __func__,
                                                        ccb_h->target_id);
                return CAM_SEL_TIMEOUT;
        }

        node = ocs_node_get_instance(ocs, fcp->tgt[ccb_h->target_id].node_id);
        if (node == NULL) {
                device_printf(ocs->dev, "%s: no device %d\n", __func__,
                                                        ccb_h->target_id);
                return CAM_SEL_TIMEOUT;
        }

        if (!node->targ) {
                device_printf(ocs->dev, "%s: not target device %d\n", __func__,
                                                        ccb_h->target_id);
                return CAM_SEL_TIMEOUT;
        }

        io = ocs_scsi_io_alloc(node, OCS_SCSI_IO_ROLE_ORIGINATOR);
        if (io == NULL) {
                device_printf(ocs->dev, "%s: unable to alloc IO\n", __func__);
                return -1;
        }

        /* eventhough this is INI, use target structure as ocs_build_scsi_sgl
         * only references the tgt_io part of an ocs_io_t */
        io->tgt_io.app = ccb;

        csio->ccb_h.ccb_ocs_ptr = ocs;
        csio->ccb_h.ccb_io_ptr  = io;
        sgl = io->sgl;

        sgl_count = ocs_build_scsi_sgl(ocs, ccb, io, sgl, io->sgl_allocated);
        if (sgl_count < 0) {
                ocs_scsi_io_free(io);
                device_printf(ocs->dev, "%s: building SGL failed\n", __func__);
                return -1;
        }

        if (ccb->ccb_h.timeout == CAM_TIME_INFINITY) {
                io->timeout = 0;
        } else if (ccb->ccb_h.timeout == CAM_TIME_DEFAULT) {
                io->timeout = OCS_CAM_IO_TIMEOUT;
        } else {
                if (ccb->ccb_h.timeout < 1000)
                        io->timeout = 1;
                else {
                        io->timeout = ccb->ccb_h.timeout / 1000;
                }
        }

        switch (csio->tag_action) {
        case MSG_HEAD_OF_Q_TAG:
                flags = OCS_SCSI_CMD_HEAD_OF_QUEUE;
                break;
        case MSG_ORDERED_Q_TAG:
                flags = OCS_SCSI_CMD_ORDERED;
                break;
        case MSG_ACA_TASK:
                flags = OCS_SCSI_CMD_ACA;
                break;
        case CAM_TAG_ACTION_NONE:
        case MSG_SIMPLE_Q_TAG:
        default:
                flags = OCS_SCSI_CMD_SIMPLE;
                break;
        }
        flags |= (csio->priority << OCS_SCSI_PRIORITY_SHIFT) &
            OCS_SCSI_PRIORITY_MASK;

        switch (ccb->ccb_h.flags & CAM_DIR_MASK) {
        case CAM_DIR_NONE:
                rc = ocs_scsi_send_nodata_io(node, io, ccb_h->target_lun,
                                ccb->ccb_h.flags & CAM_CDB_POINTER ? 
                                csio->cdb_io.cdb_ptr: csio->cdb_io.cdb_bytes,
                                csio->cdb_len,
                                ocs_scsi_initiator_io_cb, ccb, flags);
                break;
        case CAM_DIR_IN:
                rc = ocs_scsi_send_rd_io(node, io, ccb_h->target_lun,
                                ccb->ccb_h.flags & CAM_CDB_POINTER ? 
                                csio->cdb_io.cdb_ptr: csio->cdb_io.cdb_bytes,
                                csio->cdb_len,
                                NULL,
                                sgl, sgl_count, csio->dxfer_len,
                                ocs_scsi_initiator_io_cb, ccb, flags);
                break;
        case CAM_DIR_OUT:
                rc = ocs_scsi_send_wr_io(node, io, ccb_h->target_lun,
                                ccb->ccb_h.flags & CAM_CDB_POINTER ? 
                                csio->cdb_io.cdb_ptr: csio->cdb_io.cdb_bytes,
                                csio->cdb_len,
                                NULL,
                                sgl, sgl_count, csio->dxfer_len,
                                ocs_scsi_initiator_io_cb, ccb, flags);
                break;
        default:
                panic("%s invalid data direction %08x\n", __func__, 
                                                        ccb->ccb_h.flags);
                break;
        }

        return rc;
}

static uint32_t
ocs_fcp_change_role(struct ocs_softc *ocs, ocs_fcport *fcp, uint32_t new_role)
{

        uint32_t rc = 0, was = 0, i = 0;
        ocs_vport_spec_t *vport = fcp->vport;

        for (was = 0, i = 0; i < (ocs->num_vports + 1); i++) {
                if (FCPORT(ocs, i)->role != KNOB_ROLE_NONE)
                was++;
        }

        // Physical port        
        if ((was == 0) || (vport == NULL)) { 
                fcp->role = new_role;
                if (vport == NULL) {
                        ocs->enable_ini = (new_role & KNOB_ROLE_INITIATOR)? 1:0;
                        ocs->enable_tgt = (new_role & KNOB_ROLE_TARGET)? 1:0;
                } else {
                        vport->enable_ini = (new_role & KNOB_ROLE_INITIATOR)? 1:0;
                        vport->enable_tgt = (new_role & KNOB_ROLE_TARGET)? 1:0;
                }

                rc = ocs_xport_control(ocs->xport, OCS_XPORT_PORT_OFFLINE);
                if (rc) {
                        ocs_log_debug(ocs, "port offline failed : %d\n", rc);
                }

                rc = ocs_xport_control(ocs->xport, OCS_XPORT_PORT_ONLINE);
                if (rc) {
                        ocs_log_debug(ocs, "port online failed : %d\n", rc);
                }
                
                return 0;
        }

        if ((fcp->role != KNOB_ROLE_NONE)){
                fcp->role = new_role;
                vport->enable_ini = (new_role & KNOB_ROLE_INITIATOR)? 1:0;
                vport->enable_tgt = (new_role & KNOB_ROLE_TARGET)? 1:0;
                /* New Sport will be created in sport deleted cb */
                return ocs_sport_vport_del(ocs, ocs->domain, vport->wwpn, vport->wwnn);
        }

        fcp->role = new_role;

        vport->enable_ini = (new_role & KNOB_ROLE_INITIATOR)? 1:0;
        vport->enable_tgt = (new_role & KNOB_ROLE_TARGET)? 1:0;

        if (fcp->role != KNOB_ROLE_NONE) {
                return ocs_sport_vport_alloc(ocs->domain, vport);
        }

        return (0);
}

/**
 * @ingroup cam_api
 * @brief Process CAM actions
 *
 * The driver supplies this routine to the CAM during intialization and
 * is the main entry point for processing CAM Control Blocks (CCB)
 *
 * @param sim pointer to the SCSI Interface Module
 * @param ccb CAM control block
 *
 * @todo
 *  - populate path inquiry data via info retrieved from SLI port
 */
static void
ocs_action(struct cam_sim *sim, union ccb *ccb)
{
        struct ocs_softc *ocs = (struct ocs_softc *)cam_sim_softc(sim);
        struct ccb_hdr  *ccb_h = &ccb->ccb_h;

        int32_t rc, bus;
        bus = cam_sim_bus(sim);

        switch (ccb_h->func_code) {
        case XPT_SCSI_IO:

                if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
                        if ((ccb->ccb_h.flags & CAM_CDB_PHYS) != 0) {
                                ccb->ccb_h.status = CAM_REQ_INVALID;
                                xpt_done(ccb);
                                break;
                        }
                }

                rc = ocs_initiator_io(ocs, ccb);
                if (0 == rc) {
                        ocs_set_ccb_status(ccb, CAM_REQ_INPROG | CAM_SIM_QUEUED);
                        break;
                } else {
                        if (rc == CAM_REQUEUE_REQ) {
                                cam_freeze_devq(ccb->ccb_h.path);
                                cam_release_devq(ccb->ccb_h.path, RELSIM_RELEASE_AFTER_TIMEOUT, 0, 100, 0);
                                ccb->ccb_h.status = CAM_REQUEUE_REQ;
                                xpt_done(ccb);
                                break;
                        }

                        ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
                        if (rc > 0) {
                                ocs_set_ccb_status(ccb, rc);
                        } else {
                                ocs_set_ccb_status(ccb, CAM_SEL_TIMEOUT);
                        }
                }
                xpt_done(ccb);
                break;
        case XPT_PATH_INQ:
        {
                struct ccb_pathinq *cpi = &ccb->cpi;
                struct ccb_pathinq_settings_fc *fc = &cpi->xport_specific.fc;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                uint64_t wwn = 0;
                ocs_xport_stats_t value;

                cpi->version_num = 1;

                cpi->protocol = PROTO_SCSI;
                cpi->protocol_version = SCSI_REV_SPC;

                if (ocs->ocs_xport == OCS_XPORT_FC) {
                        cpi->transport = XPORT_FC;
                } else {
                        cpi->transport = XPORT_UNKNOWN;
                }

                cpi->transport_version = 0;

                /* Set the transport parameters of the SIM */
                ocs_xport_status(ocs->xport, OCS_XPORT_LINK_SPEED, &value);
                fc->bitrate = value.value * 1000;       /* speed in Mbps */

                wwn = *((uint64_t *)ocs_scsi_get_property_ptr(ocs, OCS_SCSI_WWPN));
                fc->wwpn = be64toh(wwn);

                wwn = *((uint64_t *)ocs_scsi_get_property_ptr(ocs, OCS_SCSI_WWNN));
                fc->wwnn = be64toh(wwn);

                fc->port = fcp->fc_id;

                if (ocs->config_tgt) {
                        cpi->target_sprt =
                                PIT_PROCESSOR | PIT_DISCONNECT | PIT_TERM_IO;
                }

                cpi->hba_misc = PIM_NOBUSRESET | PIM_UNMAPPED;
                cpi->hba_misc |= PIM_EXTLUNS | PIM_NOSCAN;

                cpi->hba_inquiry = PI_TAG_ABLE; 
                cpi->max_target = OCS_MAX_TARGETS;
                cpi->initiator_id = ocs->max_remote_nodes + 1;

                if (!ocs->enable_ini) {
                        cpi->hba_misc |= PIM_NOINITIATOR;
                }

                cpi->max_lun = OCS_MAX_LUN;
                cpi->bus_id = cam_sim_bus(sim);

                /* Need to supply a base transfer speed prior to linking up
                 * Worst case, this would be FC 1Gbps */
                cpi->base_transfer_speed = 1 * 1000 * 1000;

                /* Calculate the max IO supported
                 * Worst case would be an OS page per SGL entry */

                cpi->maxio = PAGE_SIZE *
                        (ocs_scsi_get_property(ocs, OCS_SCSI_MAX_SGL) - 1);

                strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
                strncpy(cpi->hba_vid, "Emulex", HBA_IDLEN);
                strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
                cpi->unit_number = cam_sim_unit(sim);

                cpi->ccb_h.status = CAM_REQ_CMP;
                xpt_done(ccb);
                break;
        }
        case XPT_GET_TRAN_SETTINGS:
        {
                struct ccb_trans_settings *cts = &ccb->cts;
                struct ccb_trans_settings_scsi *scsi = &cts->proto_specific.scsi;
                struct ccb_trans_settings_fc *fc = &cts->xport_specific.fc;
                ocs_xport_stats_t value;
                ocs_fcport *fcp = FCPORT(ocs, bus);
                ocs_fc_target_t *tgt = NULL;

                if (ocs->ocs_xport != OCS_XPORT_FC) {
                        ocs_set_ccb_status(ccb, CAM_REQ_INVALID);
                        xpt_done(ccb);
                        break;
                }

                if (cts->ccb_h.target_id > OCS_MAX_TARGETS) {
                        ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE);
                        xpt_done(ccb);
                        break;
                }

                tgt = &fcp->tgt[cts->ccb_h.target_id];
                if (tgt->state == OCS_TGT_STATE_NONE) { 
                        ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE);
                        xpt_done(ccb);
                        break;
                }

                cts->protocol = PROTO_SCSI;
                cts->protocol_version = SCSI_REV_SPC2;
                cts->transport = XPORT_FC;
                cts->transport_version = 2;

                scsi->valid = CTS_SCSI_VALID_TQ;
                scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;

                /* speed in Mbps */
                ocs_xport_status(ocs->xport, OCS_XPORT_LINK_SPEED, &value);
                fc->bitrate = value.value * 100;

                fc->wwpn = tgt->wwpn;

                fc->wwnn = tgt->wwnn;

                fc->port = tgt->port_id;

                fc->valid = CTS_FC_VALID_SPEED |
                        CTS_FC_VALID_WWPN |
                        CTS_FC_VALID_WWNN |
                        CTS_FC_VALID_PORT;

                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                xpt_done(ccb);
                break;
        }
        case XPT_SET_TRAN_SETTINGS:
                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                xpt_done(ccb);
                break;

        case XPT_CALC_GEOMETRY:
                cam_calc_geometry(&ccb->ccg, TRUE);
                xpt_done(ccb);
                break;

        case XPT_GET_SIM_KNOB:
        {
                struct ccb_sim_knob *knob = &ccb->knob;
                uint64_t wwn = 0;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                if (ocs->ocs_xport != OCS_XPORT_FC) {
                        ocs_set_ccb_status(ccb, CAM_REQ_INVALID);
                        xpt_done(ccb);
                        break;
                }
                
                if (bus == 0) {
                        wwn = *((uint64_t *)ocs_scsi_get_property_ptr(ocs,
                                                OCS_SCSI_WWNN));
                        knob->xport_specific.fc.wwnn = be64toh(wwn);

                        wwn = *((uint64_t *)ocs_scsi_get_property_ptr(ocs,
                                                OCS_SCSI_WWPN));
                        knob->xport_specific.fc.wwpn = be64toh(wwn);
                } else {
                        knob->xport_specific.fc.wwnn = fcp->vport->wwnn;
                        knob->xport_specific.fc.wwpn = fcp->vport->wwpn;
                }

                knob->xport_specific.fc.role = fcp->role;
                knob->xport_specific.fc.valid = KNOB_VALID_ADDRESS |
                                                KNOB_VALID_ROLE;

                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                xpt_done(ccb);
                break;
        }
        case XPT_SET_SIM_KNOB:
        {
                struct ccb_sim_knob *knob = &ccb->knob;
                bool role_changed = FALSE;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                if (ocs->ocs_xport != OCS_XPORT_FC) {
                        ocs_set_ccb_status(ccb, CAM_REQ_INVALID);
                        xpt_done(ccb);
                        break;
                }
                        
                if (knob->xport_specific.fc.valid & KNOB_VALID_ADDRESS) {
                        device_printf(ocs->dev, 
                                "%s: XPT_SET_SIM_KNOB wwnn=%llx wwpn=%llx\n",
                                        __func__,
                                        (unsigned long long)knob->xport_specific.fc.wwnn,
                                        (unsigned long long)knob->xport_specific.fc.wwpn);
                }

                if (knob->xport_specific.fc.valid & KNOB_VALID_ROLE) {
                        switch (knob->xport_specific.fc.role) {
                        case KNOB_ROLE_NONE:
                                if (fcp->role != KNOB_ROLE_NONE) {
                                        role_changed = TRUE;
                                }
                                break;
                        case KNOB_ROLE_TARGET:
                                if (fcp->role != KNOB_ROLE_TARGET) {
                                        role_changed = TRUE;
                                }
                                break;
                        case KNOB_ROLE_INITIATOR:
                                if (fcp->role != KNOB_ROLE_INITIATOR) {
                                        role_changed = TRUE;
                                }
                                break;
                        case KNOB_ROLE_BOTH:
                                if (fcp->role != KNOB_ROLE_BOTH) {
                                        role_changed = TRUE;
                                }
                                break;
                        default:
                                device_printf(ocs->dev,
                                        "%s: XPT_SET_SIM_KNOB unsupported role: %d\n",
                                        __func__, knob->xport_specific.fc.role);
                        }

                        if (role_changed) {
                                device_printf(ocs->dev,
                                                "BUS:%d XPT_SET_SIM_KNOB old_role: %d new_role: %d\n",
                                                bus, fcp->role, knob->xport_specific.fc.role);

                                ocs_fcp_change_role(ocs, fcp, knob->xport_specific.fc.role);
                        }
                }

                

                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                xpt_done(ccb);
                break;
        }
        case XPT_ABORT:
        {
                union ccb *accb = ccb->cab.abort_ccb;

                switch (accb->ccb_h.func_code) {
                case XPT_ACCEPT_TARGET_IO:
                        ocs_abort_atio(ocs, ccb);
                        break;
                case XPT_IMMEDIATE_NOTIFY:
                        ocs_abort_inot(ocs, ccb);
                        break;
                case XPT_SCSI_IO:
                        rc = ocs_abort_initiator_io(ocs, accb);
                        if (rc) {
                                ccb->ccb_h.status = CAM_UA_ABORT;
                        } else {
                                ccb->ccb_h.status = CAM_REQ_CMP;
                        }

                        break;
                default:
                        printf("abort of unknown func %#x\n",
                                        accb->ccb_h.func_code);
                        ccb->ccb_h.status = CAM_REQ_INVALID;
                        break;
                }
                break;
        }
        case XPT_RESET_BUS:
                if (ocs_xport_control(ocs->xport, OCS_XPORT_PORT_OFFLINE) == 0) {
                        rc = ocs_xport_control(ocs->xport, OCS_XPORT_PORT_ONLINE);
                        if (rc) {
                                ocs_log_debug(ocs, "Failed to bring port online"
                                                                " : %d\n", rc);
                        }
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                } else {
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                }
                xpt_done(ccb);
                break;
        case XPT_RESET_DEV:
        {
                ocs_node_t      *node = NULL;
                ocs_io_t        *io = NULL;
                int32_t         rc = 0;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                node = ocs_node_get_instance(ocs, fcp->tgt[ccb_h->target_id].node_id);
                if (node == NULL) {
                        device_printf(ocs->dev, "%s: no device %d\n",
                                                __func__, ccb_h->target_id);
                        ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE);
                        xpt_done(ccb);
                        break;
                }

                io = ocs_scsi_io_alloc(node, OCS_SCSI_IO_ROLE_ORIGINATOR);
                if (io == NULL) {
                        device_printf(ocs->dev, "%s: unable to alloc IO\n",
                                                                 __func__);
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                        xpt_done(ccb);
                        break;
                }

                rc = ocs_scsi_send_tmf(node, io, NULL, ccb_h->target_lun,
                                OCS_SCSI_TMF_LOGICAL_UNIT_RESET,
                                NULL, 0, 0,     /* sgl, sgl_count, length */
                                ocs_initiator_tmf_cb, NULL/*arg*/);

                if (rc) {
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                } else {
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                }
                
                if (node->fcp2device) {
                        ocs_reset_crn(node, ccb_h->target_lun);
                }

                xpt_done(ccb);
                break;
        }
        case XPT_EN_LUN:        /* target support */
        {
                ocs_tgt_resource_t *trsrc = NULL;
                uint32_t        status = 0;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                device_printf(ocs->dev, "XPT_EN_LUN %sable %d:%d\n",
                                ccb->cel.enable ? "en" : "dis",
                                ccb->ccb_h.target_id,
                                (unsigned int)ccb->ccb_h.target_lun);

                trsrc = ocs_tgt_resource_get(fcp, &ccb->ccb_h, &status);
                if (trsrc) {
                        trsrc->enabled = ccb->cel.enable;

                        /* Abort all ATIO/INOT on LUN disable */
                        if (trsrc->enabled == FALSE) {
                                ocs_tgt_resource_abort(ocs, trsrc);
                        } else {
                                STAILQ_INIT(&trsrc->atio);
                                STAILQ_INIT(&trsrc->inot);
                        }
                        status = CAM_REQ_CMP;
                }

                ocs_set_ccb_status(ccb, status);
                xpt_done(ccb);
                break;
        }
        /*
         * The flow of target IOs in CAM is:
         *  - CAM supplies a number of CCBs to the driver used for received
         *    commands.
         *  - when the driver receives a command, it copies the relevant
         *    information to the CCB and returns it to the CAM using xpt_done()
         *  - after the target server processes the request, it creates
         *    a new CCB containing information on how to continue the IO and 
         *    passes that to the driver
         *  - the driver processes the "continue IO" (a.k.a CTIO) CCB
         *  - once the IO completes, the driver returns the CTIO to the CAM 
         *    using xpt_done()
         */
        case XPT_ACCEPT_TARGET_IO:      /* used to inform upper layer of 
                                                received CDB (a.k.a. ATIO) */
        case XPT_IMMEDIATE_NOTIFY:      /* used to inform upper layer of other
                                                         event (a.k.a. INOT) */
        {
                ocs_tgt_resource_t *trsrc = NULL;
                uint32_t        status = 0;
                ocs_fcport *fcp = FCPORT(ocs, bus);

                /*printf("XPT_%s %p\n", ccb_h->func_code == XPT_ACCEPT_TARGET_IO ?
                                "ACCEPT_TARGET_IO" : "IMMEDIATE_NOTIFY", ccb);*/
                trsrc = ocs_tgt_resource_get(fcp, &ccb->ccb_h, &status);
                if (trsrc == NULL) {
                        ocs_set_ccb_status(ccb, CAM_DEV_NOT_THERE);
                        xpt_done(ccb);
                        break;
                }

                if (XPT_ACCEPT_TARGET_IO == ccb->ccb_h.func_code) {
                        struct ccb_accept_tio *atio = NULL;

                        atio = (struct ccb_accept_tio *)ccb;
                        atio->init_id = 0x0badbeef;
                        atio->tag_id  = 0xdeadc0de;

                        STAILQ_INSERT_TAIL(&trsrc->atio, &ccb->ccb_h, 
                                        sim_links.stqe);
                } else {
                        STAILQ_INSERT_TAIL(&trsrc->inot, &ccb->ccb_h, 
                                        sim_links.stqe);
                }
                ccb->ccb_h.ccb_io_ptr  = NULL;
                ccb->ccb_h.ccb_ocs_ptr = ocs;
                ocs_set_ccb_status(ccb, CAM_REQ_INPROG);
                /*
                 * These actions give resources to the target driver.
                 * If we didn't return here, this function would call
                 * xpt_done(), signaling to the upper layers that an
                 * IO or other event had arrived.
                 */
                break;
        }
        case XPT_NOTIFY_ACKNOWLEDGE:
        {
                ocs_io_t *io = NULL;
                ocs_io_t *abortio = NULL;

                /* Get the IO reference for this tag */
                io = ocs_scsi_find_io(ocs, ccb->cna2.tag_id);
                if (io == NULL) {
                        device_printf(ocs->dev,
                                "%s: XPT_NOTIFY_ACKNOWLEDGE no IO with tag %#x\n",
                                        __func__, ccb->cna2.tag_id);
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP_ERR);
                        xpt_done(ccb);
                        break;
                }

                abortio = io->tgt_io.app;
                if (abortio) {
                        abortio->tgt_io.flags &= ~OCS_CAM_IO_F_ABORT_NOTIFY;
                        device_printf(ocs->dev,
                                "%s: XPT_NOTIFY_ACK state=%d tag=%#x xid=%#x"
                                " flags=%#x\n", __func__, abortio->tgt_io.state,
                                abortio->tag, abortio->init_task_tag,
                                        abortio->tgt_io.flags);
                        /* TMF response was sent in abort callback */
                } else {
                        ocs_scsi_send_tmf_resp(io, 
                                        OCS_SCSI_TMF_FUNCTION_COMPLETE,
                                        NULL, ocs_target_tmf_cb, NULL);
                }

                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                xpt_done(ccb);
                break;
        }
        case XPT_CONT_TARGET_IO:        /* continue target IO, sending data/response (a.k.a. CTIO) */
                if (ocs_target_io(ocs, ccb)) {
                        device_printf(ocs->dev, 
                                "XPT_CONT_TARGET_IO failed flags=%x tag=%#x\n",
                                ccb->ccb_h.flags, ccb->csio.tag_id);
                        xpt_done(ccb);
                }
                break;
        default:
                device_printf(ocs->dev, "unhandled func_code = %#x\n",
                                ccb_h->func_code);
                ccb_h->status = CAM_REQ_INVALID;
                xpt_done(ccb);
                break;
        }
}

/**
 * @ingroup cam_api
 * @brief Process events
 *
 * @param sim pointer to the SCSI Interface Module
 *
 */
static void
ocs_poll(struct cam_sim *sim)
{
        printf("%s\n", __func__);
}

static int32_t
ocs_initiator_tmf_cb(ocs_io_t *io, ocs_scsi_io_status_e scsi_status,
                ocs_scsi_cmd_resp_t *rsp, uint32_t flags, void *arg)
{
        int32_t rc = 0;

        switch (scsi_status) {
        case OCS_SCSI_STATUS_GOOD:
        case OCS_SCSI_STATUS_NO_IO:
                break;
        case OCS_SCSI_STATUS_CHECK_RESPONSE:
                if (rsp->response_data_length == 0) {
                        ocs_log_test(io->ocs, "check response without data?!?\n");
                        rc = -1;
                        break;
                }

                if (rsp->response_data[3] != 0) {
                        ocs_log_test(io->ocs, "TMF status %08x\n",
                                be32toh(*((uint32_t *)rsp->response_data)));
                        rc = -1;
                        break;
                }
                break;
        default:
                ocs_log_test(io->ocs, "status=%#x\n", scsi_status);
                rc = -1;
        }

        ocs_scsi_io_free(io);

        return rc;
}

/**
 * @brief lookup target resource structure
 *
 * Arbitrarily support
 *  - wildcard target ID + LU
 *  - 0 target ID + non-wildcard LU
 *
 * @param ocs the driver instance's software context
 * @param ccb_h pointer to the CCB header
 * @param status returned status value
 *
 * @return pointer to the target resource, NULL if none available (e.g. if LU
 *         is not enabled)
 */
static ocs_tgt_resource_t *ocs_tgt_resource_get(ocs_fcport *fcp, 
                                struct ccb_hdr *ccb_h, uint32_t *status)
{
        target_id_t     tid = ccb_h->target_id;
        lun_id_t        lun = ccb_h->target_lun;

        if (CAM_TARGET_WILDCARD == tid) {
                if (CAM_LUN_WILDCARD != lun) {
                        *status = CAM_LUN_INVALID;
                        return NULL;
                }
                return &fcp->targ_rsrc_wildcard;
        } else {
                if (lun < OCS_MAX_LUN) {
                        return &fcp->targ_rsrc[lun];
                } else {
                        *status = CAM_LUN_INVALID;
                        return NULL;
                }
        } 

}

static int32_t
ocs_tgt_resource_abort(struct ocs_softc *ocs, ocs_tgt_resource_t *trsrc)
{
        union ccb *ccb = NULL;

        do {
                ccb = (union ccb *)STAILQ_FIRST(&trsrc->atio);
                if (ccb) {
                        STAILQ_REMOVE_HEAD(&trsrc->atio, sim_links.stqe);
                        ccb->ccb_h.status = CAM_REQ_ABORTED;
                        xpt_done(ccb);
                }
        } while (ccb);

        do {
                ccb = (union ccb *)STAILQ_FIRST(&trsrc->inot);
                if (ccb) {
                        STAILQ_REMOVE_HEAD(&trsrc->inot, sim_links.stqe);
                        ccb->ccb_h.status = CAM_REQ_ABORTED;
                        xpt_done(ccb);
                }
        } while (ccb);

        return 0;
}

static void
ocs_abort_atio(struct ocs_softc *ocs, union ccb *ccb)
{

        ocs_io_t        *aio = NULL;
        ocs_tgt_resource_t *trsrc = NULL;
        uint32_t        status = CAM_REQ_INVALID;
        struct ccb_hdr *cur = NULL;
        union ccb *accb = ccb->cab.abort_ccb;

        int bus = cam_sim_bus(xpt_path_sim((ccb)->ccb_h.path));
        ocs_fcport *fcp = FCPORT(ocs, bus); 

        trsrc = ocs_tgt_resource_get(fcp, &accb->ccb_h, &status);
        if (trsrc != NULL) {
                STAILQ_FOREACH(cur, &trsrc->atio, sim_links.stqe) {
                        if (cur != &accb->ccb_h) 
                                continue;

                        STAILQ_REMOVE(&trsrc->atio, cur, ccb_hdr,
                                                        sim_links.stqe);
                        accb->ccb_h.status = CAM_REQ_ABORTED;
                        xpt_done(accb);
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                        return;
                }
        }

        /* if the ATIO has a valid IO pointer, CAM is telling
         * the driver that the ATIO (which represents the entire
         * exchange) has been aborted. */

        aio = accb->ccb_h.ccb_io_ptr;
        if (aio == NULL) {
                ccb->ccb_h.status = CAM_UA_ABORT;
                return;
        }

        device_printf(ocs->dev,
                        "%s: XPT_ABORT ATIO state=%d tag=%#x"
                        " xid=%#x flags=%#x\n", __func__, 
                        aio->tgt_io.state, aio->tag, 
                        aio->init_task_tag, aio->tgt_io.flags);
        /* Expectations are:
         *  - abort task was received
         *  - already aborted IO in the DEVICE
         *  - already received NOTIFY ACKNOWLEDGE */

        if ((aio->tgt_io.flags & OCS_CAM_IO_F_ABORT_RECV) == 0) {
                device_printf(ocs->dev, "%s: abort not received or io completed \n", __func__);
                ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                return;
        }

        aio->tgt_io.flags |= OCS_CAM_IO_F_ABORT_CAM;
        ocs_target_io_free(aio);
        ocs_set_ccb_status(ccb, CAM_REQ_CMP);

        return;
}

static void
ocs_abort_inot(struct ocs_softc *ocs, union ccb *ccb)
{
        ocs_tgt_resource_t *trsrc = NULL;
        uint32_t        status = CAM_REQ_INVALID;
        struct ccb_hdr *cur = NULL;
        union ccb *accb = ccb->cab.abort_ccb;

        int bus = cam_sim_bus(xpt_path_sim((ccb)->ccb_h.path));
        ocs_fcport *fcp = FCPORT(ocs, bus); 

        trsrc = ocs_tgt_resource_get(fcp, &accb->ccb_h, &status);
        if (trsrc) {
                STAILQ_FOREACH(cur, &trsrc->inot, sim_links.stqe) {
                        if (cur != &accb->ccb_h) 
                                continue;

                        STAILQ_REMOVE(&trsrc->inot, cur, ccb_hdr,
                                                        sim_links.stqe);
                        accb->ccb_h.status = CAM_REQ_ABORTED;
                        xpt_done(accb);
                        ocs_set_ccb_status(ccb, CAM_REQ_CMP);
                        return;
                }
        }

        ocs_set_ccb_status(ccb, CAM_UA_ABORT);
        return;
}

static uint32_t
ocs_abort_initiator_io(struct ocs_softc *ocs, union ccb *accb)
{

        ocs_node_t      *node = NULL;
        ocs_io_t        *io = NULL;
        int32_t         rc = 0;
        struct ccb_scsiio *csio = &accb->csio;

        ocs_fcport *fcp = FCPORT(ocs, cam_sim_bus(xpt_path_sim((accb)->ccb_h.path)));
        node = ocs_node_get_instance(ocs, fcp->tgt[accb->ccb_h.target_id].node_id);
        if (node == NULL) {
                device_printf(ocs->dev, "%s: no device %d\n", 
                                __func__, accb->ccb_h.target_id);
                ocs_set_ccb_status(accb, CAM_DEV_NOT_THERE);
                xpt_done(accb);
                return (-1);
        }

        io = ocs_scsi_io_alloc(node, OCS_SCSI_IO_ROLE_ORIGINATOR);
        if (io == NULL) {
                device_printf(ocs->dev,
                                "%s: unable to alloc IO\n", __func__);
                ocs_set_ccb_status(accb, CAM_REQ_CMP_ERR);
                xpt_done(accb);
                return (-1);
        }

        rc = ocs_scsi_send_tmf(node, io, 
                        (ocs_io_t *)csio->ccb_h.ccb_io_ptr,
                        accb->ccb_h.target_lun,
                        OCS_SCSI_TMF_ABORT_TASK,
                        NULL, 0, 0,
                        ocs_initiator_tmf_cb, NULL/*arg*/);

        return rc;
}

void
ocs_scsi_ini_ddump(ocs_textbuf_t *textbuf, ocs_scsi_ddump_type_e type, void *obj)
{
        switch(type) {
        case OCS_SCSI_DDUMP_DEVICE: {
                //ocs_t *ocs = obj;
                break;
        }
        case OCS_SCSI_DDUMP_DOMAIN: {
                //ocs_domain_t *domain = obj;
                break;
        }
        case OCS_SCSI_DDUMP_SPORT: {
                //ocs_sport_t *sport = obj;
                break;
        }
        case OCS_SCSI_DDUMP_NODE: {
                //ocs_node_t *node = obj;
                break;
        }
        case OCS_SCSI_DDUMP_IO: {
                //ocs_io_t *io = obj;
                break;
        }
        default: {
                break;
        }
        }
}

void
ocs_scsi_tgt_ddump(ocs_textbuf_t *textbuf, ocs_scsi_ddump_type_e type, void *obj)
{
        switch(type) {
        case OCS_SCSI_DDUMP_DEVICE: {
                //ocs_t *ocs = obj;
                break;
        }
        case OCS_SCSI_DDUMP_DOMAIN: {
                //ocs_domain_t *domain = obj;
                break;
        }
        case OCS_SCSI_DDUMP_SPORT: {
                //ocs_sport_t *sport = obj;
                break;
        }
        case OCS_SCSI_DDUMP_NODE: {
                //ocs_node_t *node = obj;
                break;
        }
        case OCS_SCSI_DDUMP_IO: {
                ocs_io_t *io = obj;
                char *state_str = NULL;

                switch (io->tgt_io.state) {
                case OCS_CAM_IO_FREE:
                        state_str = "FREE";
                        break;
                case OCS_CAM_IO_COMMAND:
                        state_str = "COMMAND";
                        break;
                case OCS_CAM_IO_DATA:
                        state_str = "DATA";
                        break;
                case OCS_CAM_IO_DATA_DONE:
                        state_str = "DATA_DONE";
                        break;
                case OCS_CAM_IO_RESP:
                        state_str = "RESP";
                        break;
                default:
                        state_str = "xxx BAD xxx";
                }
                ocs_ddump_value(textbuf, "cam_st", "%s", state_str);
                if (io->tgt_io.app) {
                        ocs_ddump_value(textbuf, "cam_flags", "%#x",
                                ((union ccb *)(io->tgt_io.app))->ccb_h.flags);
                        ocs_ddump_value(textbuf, "cam_status", "%#x",
                                ((union ccb *)(io->tgt_io.app))->ccb_h.status);
                }

                break;
        }
        default: {
                break;
        }
        }
}

int32_t ocs_scsi_get_block_vaddr(ocs_io_t *io, uint64_t blocknumber,
                                ocs_scsi_vaddr_len_t addrlen[],
                                uint32_t max_addrlen, void **dif_vaddr)
{
        return -1;
}

uint32_t
ocs_get_crn(ocs_node_t *node, uint8_t *crn, uint64_t lun)
{
        uint32_t idx;
        struct ocs_lun_crn *lcrn = NULL;
        idx = lun % OCS_MAX_LUN;

        lcrn = node->ini_node.lun_crn[idx];

        if (lcrn == NULL) {
                lcrn = ocs_malloc(node->ocs, sizeof(struct ocs_lun_crn),
                                        M_ZERO|M_NOWAIT);
                if (lcrn == NULL) {
                        return (1);
                }
                
                lcrn->lun = lun;
                node->ini_node.lun_crn[idx] = lcrn;
        }

        if (lcrn->lun != lun) {
                return (1);
        }       

        if (lcrn->crnseed == 0)
                lcrn->crnseed = 1;

        *crn = lcrn->crnseed++;
        return (0);
}

void
ocs_del_crn(ocs_node_t *node)
{
        uint32_t i;
        struct ocs_lun_crn *lcrn = NULL;

        for(i = 0; i < OCS_MAX_LUN; i++) {
                lcrn = node->ini_node.lun_crn[i];
                if (lcrn) {
                        ocs_free(node->ocs, lcrn, sizeof(*lcrn));
                }
        }

        return;
}

void
ocs_reset_crn(ocs_node_t *node, uint64_t lun)
{
        uint32_t idx;
        struct ocs_lun_crn *lcrn = NULL;
        idx = lun % OCS_MAX_LUN;

        lcrn = node->ini_node.lun_crn[idx];
        if (lcrn)
                lcrn->crnseed = 0;

        return;
}