/*
 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
 * Copyright (c) 2014- QLogic Corporation.
 * All rights reserved
 * www.qlogic.com
 *
 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#include "bfad_drv.h"
#include "bfa_modules.h"

BFA_TRC_FILE(HAL, FCPIM);

/*
 *  BFA ITNIM Related definitions
 */
static void bfa_itnim_update_del_itn_stats(struct bfa_itnim_s *itnim);
static void bfa_ioim_lm_init(struct bfa_s *bfa);

#define BFA_ITNIM_FROM_TAG(_fcpim, _tag)                                \
        (((_fcpim)->itnim_arr + ((_tag) & ((_fcpim)->num_itnims - 1))))

#define bfa_fcpim_additn(__itnim)                                       \
        list_add_tail(&(__itnim)->qe, &(__itnim)->fcpim->itnim_q)
#define bfa_fcpim_delitn(__itnim)       do {                            \
        WARN_ON(!bfa_q_is_on_q(&(__itnim)->fcpim->itnim_q, __itnim));   \
        bfa_itnim_update_del_itn_stats(__itnim);      \
        list_del(&(__itnim)->qe);      \
        WARN_ON(!list_empty(&(__itnim)->io_q));                         \
        WARN_ON(!list_empty(&(__itnim)->io_cleanup_q));                 \
        WARN_ON(!list_empty(&(__itnim)->pending_q));                    \
} while (0)

#define bfa_itnim_online_cb(__itnim) do {                               \
        if ((__itnim)->bfa->fcs)                                        \
                bfa_cb_itnim_online((__itnim)->ditn);      \
        else {                                                          \
                bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,        \
                __bfa_cb_itnim_online, (__itnim));      \
        }                                                               \
} while (0)

#define bfa_itnim_offline_cb(__itnim) do {                              \
        if ((__itnim)->bfa->fcs)                                        \
                bfa_cb_itnim_offline((__itnim)->ditn);      \
        else {                                                          \
                bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,        \
                __bfa_cb_itnim_offline, (__itnim));      \
        }                                                               \
} while (0)

#define bfa_itnim_sler_cb(__itnim) do {                                 \
        if ((__itnim)->bfa->fcs)                                        \
                bfa_cb_itnim_sler((__itnim)->ditn);      \
        else {                                                          \
                bfa_cb_queue((__itnim)->bfa, &(__itnim)->hcb_qe,        \
                __bfa_cb_itnim_sler, (__itnim));      \
        }                                                               \
} while (0)

enum bfa_ioim_lm_ua_status {
        BFA_IOIM_LM_UA_RESET = 0,
        BFA_IOIM_LM_UA_SET = 1,
};

/*
 *  itnim state machine event
 */
enum bfa_itnim_event {
        BFA_ITNIM_SM_CREATE = 1,        /*  itnim is created */
        BFA_ITNIM_SM_ONLINE = 2,        /*  itnim is online */
        BFA_ITNIM_SM_OFFLINE = 3,       /*  itnim is offline */
        BFA_ITNIM_SM_FWRSP = 4,         /*  firmware response */
        BFA_ITNIM_SM_DELETE = 5,        /*  deleting an existing itnim */
        BFA_ITNIM_SM_CLEANUP = 6,       /*  IO cleanup completion */
        BFA_ITNIM_SM_SLER = 7,          /*  second level error recovery */
        BFA_ITNIM_SM_HWFAIL = 8,        /*  IOC h/w failure event */
        BFA_ITNIM_SM_QRESUME = 9,       /*  queue space available */
};

/*
 *  BFA IOIM related definitions
 */
#define bfa_ioim_move_to_comp_q(__ioim) do {                            \
        list_del(&(__ioim)->qe);                                        \
        list_add_tail(&(__ioim)->qe, &(__ioim)->fcpim->ioim_comp_q);    \
} while (0)


#define bfa_ioim_cb_profile_comp(__fcpim, __ioim) do {                  \
        if ((__fcpim)->profile_comp)                                    \
                (__fcpim)->profile_comp(__ioim);                        \
} while (0)

#define bfa_ioim_cb_profile_start(__fcpim, __ioim) do {                 \
        if ((__fcpim)->profile_start)                                   \
                (__fcpim)->profile_start(__ioim);                       \
} while (0)

/*
 * IO state machine events
 */
enum bfa_ioim_event {
        BFA_IOIM_SM_START       = 1,    /*  io start request from host */
        BFA_IOIM_SM_COMP_GOOD   = 2,    /*  io good comp, resource free */
        BFA_IOIM_SM_COMP        = 3,    /*  io comp, resource is free */
        BFA_IOIM_SM_COMP_UTAG   = 4,    /*  io comp, resource is free */
        BFA_IOIM_SM_DONE        = 5,    /*  io comp, resource not free */
        BFA_IOIM_SM_FREE        = 6,    /*  io resource is freed */
        BFA_IOIM_SM_ABORT       = 7,    /*  abort request from scsi stack */
        BFA_IOIM_SM_ABORT_COMP  = 8,    /*  abort from f/w */
        BFA_IOIM_SM_ABORT_DONE  = 9,    /*  abort completion from f/w */
        BFA_IOIM_SM_QRESUME     = 10,   /*  CQ space available to queue IO */
        BFA_IOIM_SM_SGALLOCED   = 11,   /*  SG page allocation successful */
        BFA_IOIM_SM_SQRETRY     = 12,   /*  sequence recovery retry */
        BFA_IOIM_SM_HCB         = 13,   /*  bfa callback complete */
        BFA_IOIM_SM_CLEANUP     = 14,   /*  IO cleanup from itnim */
        BFA_IOIM_SM_TMSTART     = 15,   /*  IO cleanup from tskim */
        BFA_IOIM_SM_TMDONE      = 16,   /*  IO cleanup from tskim */
        BFA_IOIM_SM_HWFAIL      = 17,   /*  IOC h/w failure event */
        BFA_IOIM_SM_IOTOV       = 18,   /*  ITN offline TOV */
};


/*
 *  BFA TSKIM related definitions
 */

/*
 * task management completion handling
 */
#define bfa_tskim_qcomp(__tskim, __cbfn) do {                           \
        bfa_cb_queue((__tskim)->bfa, &(__tskim)->hcb_qe, __cbfn, (__tskim));\
        bfa_tskim_notify_comp(__tskim);      \
} while (0)

#define bfa_tskim_notify_comp(__tskim) do {                             \
        if ((__tskim)->notify)                                          \
                bfa_itnim_tskdone((__tskim)->itnim);      \
} while (0)


enum bfa_tskim_event {
        BFA_TSKIM_SM_START      = 1,    /*  TM command start            */
        BFA_TSKIM_SM_DONE       = 2,    /*  TM completion               */
        BFA_TSKIM_SM_QRESUME    = 3,    /*  resume after qfull          */
        BFA_TSKIM_SM_HWFAIL     = 5,    /*  IOC h/w failure event       */
        BFA_TSKIM_SM_HCB        = 6,    /*  BFA callback completion     */
        BFA_TSKIM_SM_IOS_DONE   = 7,    /*  IO and sub TM completions   */
        BFA_TSKIM_SM_CLEANUP    = 8,    /*  TM cleanup on ITN offline   */
        BFA_TSKIM_SM_CLEANUP_DONE = 9,  /*  TM abort completion */
        BFA_TSKIM_SM_UTAG       = 10,   /*  TM completion unknown tag  */
};

/*
 * forward declaration for BFA ITNIM functions
 */
static void     bfa_itnim_iocdisable_cleanup(struct bfa_itnim_s *itnim);
static bfa_boolean_t bfa_itnim_send_fwcreate(struct bfa_itnim_s *itnim);
static bfa_boolean_t bfa_itnim_send_fwdelete(struct bfa_itnim_s *itnim);
static void     bfa_itnim_cleanp_comp(void *itnim_cbarg);
static void     bfa_itnim_cleanup(struct bfa_itnim_s *itnim);
static void     __bfa_cb_itnim_online(void *cbarg, bfa_boolean_t complete);
static void     __bfa_cb_itnim_offline(void *cbarg, bfa_boolean_t complete);
static void     __bfa_cb_itnim_sler(void *cbarg, bfa_boolean_t complete);
static void     bfa_itnim_iotov_online(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_cleanup(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov(void *itnim_arg);
static void     bfa_itnim_iotov_start(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_stop(struct bfa_itnim_s *itnim);
static void     bfa_itnim_iotov_delete(struct bfa_itnim_s *itnim);

/*
 * forward declaration of ITNIM state machine
 */
static void     bfa_itnim_sm_uninit(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_created(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwcreate(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_delete_pending(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_online(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_sler(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_cleanup_offline(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_cleanup_delete(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwdelete(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_offline(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_iocdisable(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_deleting(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwcreate_qfull(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_fwdelete_qfull(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);
static void     bfa_itnim_sm_deleting_qfull(struct bfa_itnim_s *itnim,
                                        enum bfa_itnim_event event);

/*
 * forward declaration for BFA IOIM functions
 */
static bfa_boolean_t    bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim);
static bfa_boolean_t    bfa_ioim_sgpg_alloc(struct bfa_ioim_s *ioim);
static bfa_boolean_t    bfa_ioim_send_abort(struct bfa_ioim_s *ioim);
static void             bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim);
static void __bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete);
static void __bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete);
static bfa_boolean_t    bfa_ioim_is_abortable(struct bfa_ioim_s *ioim);

/*
 * forward declaration of BFA IO state machine
 */
static void     bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_active(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_abort(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
static void     bfa_ioim_sm_cmnd_retry(struct bfa_ioim_s *ioim,
                                        enum bfa_ioim_event event);
/*
 * forward declaration for BFA TSKIM functions
 */
static void     __bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete);
static void     __bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete);
static bfa_boolean_t bfa_tskim_match_scope(struct bfa_tskim_s *tskim,
                                        struct scsi_lun lun);
static void     bfa_tskim_gather_ios(struct bfa_tskim_s *tskim);
static void     bfa_tskim_cleanp_comp(void *tskim_cbarg);
static void     bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim);
static bfa_boolean_t bfa_tskim_send(struct bfa_tskim_s *tskim);
static bfa_boolean_t bfa_tskim_send_abort(struct bfa_tskim_s *tskim);
static void     bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim);

/*
 * forward declaration of BFA TSKIM state machine
 */
static void     bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_active(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
static void     bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim,
                                        enum bfa_tskim_event event);
/*
 *  BFA FCP Initiator Mode module
 */

/*
 * Compute and return memory needed by FCP(im) module.
 */
static void
bfa_fcpim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len)
{
        bfa_itnim_meminfo(cfg, km_len);

        /*
         * IO memory
         */
        *km_len += cfg->fwcfg.num_ioim_reqs *
          (sizeof(struct bfa_ioim_s) + sizeof(struct bfa_ioim_sp_s));

        /*
         * task management command memory
         */
        if (cfg->fwcfg.num_tskim_reqs < BFA_TSKIM_MIN)
                cfg->fwcfg.num_tskim_reqs = BFA_TSKIM_MIN;
        *km_len += cfg->fwcfg.num_tskim_reqs * sizeof(struct bfa_tskim_s);
}


static void
bfa_fcpim_attach(struct bfa_fcp_mod_s *fcp, void *bfad,
                struct bfa_iocfc_cfg_s *cfg, struct bfa_pcidev_s *pcidev)
{
        struct bfa_fcpim_s *fcpim = &fcp->fcpim;
        struct bfa_s *bfa = fcp->bfa;

        bfa_trc(bfa, cfg->drvcfg.path_tov);
        bfa_trc(bfa, cfg->fwcfg.num_rports);
        bfa_trc(bfa, cfg->fwcfg.num_ioim_reqs);
        bfa_trc(bfa, cfg->fwcfg.num_tskim_reqs);

        fcpim->fcp              = fcp;
        fcpim->bfa              = bfa;
        fcpim->num_itnims       = cfg->fwcfg.num_rports;
        fcpim->num_tskim_reqs = cfg->fwcfg.num_tskim_reqs;
        fcpim->path_tov         = cfg->drvcfg.path_tov;
        fcpim->delay_comp       = cfg->drvcfg.delay_comp;
        fcpim->profile_comp = NULL;
        fcpim->profile_start = NULL;

        bfa_itnim_attach(fcpim);
        bfa_tskim_attach(fcpim);
        bfa_ioim_attach(fcpim);
}

static void
bfa_fcpim_iocdisable(struct bfa_fcp_mod_s *fcp)
{
        struct bfa_fcpim_s *fcpim = &fcp->fcpim;
        struct bfa_itnim_s *itnim;
        struct list_head *qe, *qen;

        /* Enqueue unused ioim resources to free_q */
        list_splice_tail_init(&fcpim->tskim_unused_q, &fcpim->tskim_free_q);

        list_for_each_safe(qe, qen, &fcpim->itnim_q) {
                itnim = (struct bfa_itnim_s *) qe;
                bfa_itnim_iocdisable(itnim);
        }
}

void
bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);

        fcpim->path_tov = path_tov * 1000;
        if (fcpim->path_tov > BFA_FCPIM_PATHTOV_MAX)
                fcpim->path_tov = BFA_FCPIM_PATHTOV_MAX;
}

u16
bfa_fcpim_path_tov_get(struct bfa_s *bfa)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);

        return fcpim->path_tov / 1000;
}

#define bfa_fcpim_add_iostats(__l, __r, __stats)        \
        (__l->__stats += __r->__stats)

void
bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *lstats,
                struct bfa_itnim_iostats_s *rstats)
{
        bfa_fcpim_add_iostats(lstats, rstats, total_ios);
        bfa_fcpim_add_iostats(lstats, rstats, qresumes);
        bfa_fcpim_add_iostats(lstats, rstats, no_iotags);
        bfa_fcpim_add_iostats(lstats, rstats, io_aborts);
        bfa_fcpim_add_iostats(lstats, rstats, no_tskims);
        bfa_fcpim_add_iostats(lstats, rstats, iocomp_ok);
        bfa_fcpim_add_iostats(lstats, rstats, iocomp_underrun);
        bfa_fcpim_add_iostats(lstats, rstats, iocomp_overrun);
        bfa_fcpim_add_iostats(lstats, rstats, iocomp_aborted);
        bfa_fcpim_add_iostats(lstats, rstats, iocomp_timedout);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_nexus_abort);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_proto_err);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_dif_err);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_sqer_needed);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_res_free);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_hostabrts);
        bfa_fcpim_add_iostats(lstats, rstats, iocom_utags);
        bfa_fcpim_add_iostats(lstats, rstats, io_cleanups);
        bfa_fcpim_add_iostats(lstats, rstats, io_tmaborts);
        bfa_fcpim_add_iostats(lstats, rstats, onlines);
        bfa_fcpim_add_iostats(lstats, rstats, offlines);
        bfa_fcpim_add_iostats(lstats, rstats, creates);
        bfa_fcpim_add_iostats(lstats, rstats, deletes);
        bfa_fcpim_add_iostats(lstats, rstats, create_comps);
        bfa_fcpim_add_iostats(lstats, rstats, delete_comps);
        bfa_fcpim_add_iostats(lstats, rstats, sler_events);
        bfa_fcpim_add_iostats(lstats, rstats, fw_create);
        bfa_fcpim_add_iostats(lstats, rstats, fw_delete);
        bfa_fcpim_add_iostats(lstats, rstats, ioc_disabled);
        bfa_fcpim_add_iostats(lstats, rstats, cleanup_comps);
        bfa_fcpim_add_iostats(lstats, rstats, tm_cmnds);
        bfa_fcpim_add_iostats(lstats, rstats, tm_fw_rsps);
        bfa_fcpim_add_iostats(lstats, rstats, tm_success);
        bfa_fcpim_add_iostats(lstats, rstats, tm_failures);
        bfa_fcpim_add_iostats(lstats, rstats, tm_io_comps);
        bfa_fcpim_add_iostats(lstats, rstats, tm_qresumes);
        bfa_fcpim_add_iostats(lstats, rstats, tm_iocdowns);
        bfa_fcpim_add_iostats(lstats, rstats, tm_cleanups);
        bfa_fcpim_add_iostats(lstats, rstats, tm_cleanup_comps);
        bfa_fcpim_add_iostats(lstats, rstats, io_comps);
        bfa_fcpim_add_iostats(lstats, rstats, input_reqs);
        bfa_fcpim_add_iostats(lstats, rstats, output_reqs);
        bfa_fcpim_add_iostats(lstats, rstats, rd_throughput);
        bfa_fcpim_add_iostats(lstats, rstats, wr_throughput);
}

bfa_status_t
bfa_fcpim_port_iostats(struct bfa_s *bfa,
                struct bfa_itnim_iostats_s *stats, u8 lp_tag)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct list_head *qe, *qen;
        struct bfa_itnim_s *itnim;

        /* accumulate IO stats from itnim */
        memset(stats, 0, sizeof(struct bfa_itnim_iostats_s));
        list_for_each_safe(qe, qen, &fcpim->itnim_q) {
                itnim = (struct bfa_itnim_s *) qe;
                if (itnim->rport->rport_info.lp_tag != lp_tag)
                        continue;
                bfa_fcpim_add_stats(stats, &(itnim->stats));
        }
        return BFA_STATUS_OK;
}

void
bfa_ioim_profile_comp(struct bfa_ioim_s *ioim)
{
        struct bfa_itnim_latency_s *io_lat =
                        &(ioim->itnim->ioprofile.io_latency);
        u32 val, idx;

        val = (u32)(jiffies - ioim->start_time);
        idx = bfa_ioim_get_index(scsi_bufflen((struct scsi_cmnd *)ioim->dio));
        bfa_itnim_ioprofile_update(ioim->itnim, idx);

        io_lat->count[idx]++;
        io_lat->min[idx] = (io_lat->min[idx] < val) ? io_lat->min[idx] : val;
        io_lat->max[idx] = (io_lat->max[idx] > val) ? io_lat->max[idx] : val;
        io_lat->avg[idx] += val;
}

void
bfa_ioim_profile_start(struct bfa_ioim_s *ioim)
{
        ioim->start_time = jiffies;
}

bfa_status_t
bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time)
{
        struct bfa_itnim_s *itnim;
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct list_head *qe, *qen;

        /* accumulate IO stats from itnim */
        list_for_each_safe(qe, qen, &fcpim->itnim_q) {
                itnim = (struct bfa_itnim_s *) qe;
                bfa_itnim_clear_stats(itnim);
        }
        fcpim->io_profile = BFA_TRUE;
        fcpim->io_profile_start_time = time;
        fcpim->profile_comp = bfa_ioim_profile_comp;
        fcpim->profile_start = bfa_ioim_profile_start;
        return BFA_STATUS_OK;
}

bfa_status_t
bfa_fcpim_profile_off(struct bfa_s *bfa)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        fcpim->io_profile = BFA_FALSE;
        fcpim->io_profile_start_time = 0;
        fcpim->profile_comp = NULL;
        fcpim->profile_start = NULL;
        return BFA_STATUS_OK;
}

u16
bfa_fcpim_qdepth_get(struct bfa_s *bfa)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);

        return fcpim->q_depth;
}

/*
 *  BFA ITNIM module state machine functions
 */

/*
 * Beginning/unallocated state - no events expected.
 */
static void
bfa_itnim_sm_uninit(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_CREATE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_created);
                itnim->is_online = BFA_FALSE;
                bfa_fcpim_additn(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Beginning state, only online event expected.
 */
static void
bfa_itnim_sm_created(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_ONLINE:
                if (bfa_itnim_send_fwcreate(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_fcpim_delitn(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 *      Waiting for itnim create response from firmware.
 */
static void
bfa_itnim_sm_fwcreate(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_FWRSP:
                bfa_sm_set_state(itnim, bfa_itnim_sm_online);
                itnim->is_online = BFA_TRUE;
                bfa_itnim_iotov_online(itnim);
                bfa_itnim_online_cb(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_delete_pending);
                break;

        case BFA_ITNIM_SM_OFFLINE:
                if (bfa_itnim_send_fwdelete(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

static void
bfa_itnim_sm_fwcreate_qfull(struct bfa_itnim_s *itnim,
                        enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_QRESUME:
                bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
                bfa_itnim_send_fwcreate(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_reqq_wcancel(&itnim->reqq_wait);
                bfa_fcpim_delitn(itnim);
                break;

        case BFA_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_offline);
                bfa_reqq_wcancel(&itnim->reqq_wait);
                bfa_itnim_offline_cb(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_reqq_wcancel(&itnim->reqq_wait);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Waiting for itnim create response from firmware, a delete is pending.
 */
static void
bfa_itnim_sm_delete_pending(struct bfa_itnim_s *itnim,
                                enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_FWRSP:
                if (bfa_itnim_send_fwdelete(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_fcpim_delitn(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Online state - normal parking state.
 */
static void
bfa_itnim_sm_online(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_offline);
                itnim->is_online = BFA_FALSE;
                bfa_itnim_iotov_start(itnim);
                bfa_itnim_cleanup(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
                itnim->is_online = BFA_FALSE;
                bfa_itnim_cleanup(itnim);
                break;

        case BFA_ITNIM_SM_SLER:
                bfa_sm_set_state(itnim, bfa_itnim_sm_sler);
                itnim->is_online = BFA_FALSE;
                bfa_itnim_iotov_start(itnim);
                bfa_itnim_sler_cb(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                itnim->is_online = BFA_FALSE;
                bfa_itnim_iotov_start(itnim);
                bfa_itnim_iocdisable_cleanup(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Second level error recovery need.
 */
static void
bfa_itnim_sm_sler(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_offline);
                bfa_itnim_cleanup(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
                bfa_itnim_cleanup(itnim);
                bfa_itnim_iotov_delete(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_itnim_iocdisable_cleanup(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Going offline. Waiting for active IO cleanup.
 */
static void
bfa_itnim_sm_cleanup_offline(struct bfa_itnim_s *itnim,
                                 enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_CLEANUP:
                if (bfa_itnim_send_fwdelete(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete_qfull);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_cleanup_delete);
                bfa_itnim_iotov_delete(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_itnim_iocdisable_cleanup(itnim);
                bfa_itnim_offline_cb(itnim);
                break;

        case BFA_ITNIM_SM_SLER:
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Deleting itnim. Waiting for active IO cleanup.
 */
static void
bfa_itnim_sm_cleanup_delete(struct bfa_itnim_s *itnim,
                                enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_CLEANUP:
                if (bfa_itnim_send_fwdelete(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_itnim_iocdisable_cleanup(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Rport offline. Fimrware itnim is being deleted - awaiting f/w response.
 */
static void
bfa_itnim_sm_fwdelete(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_FWRSP:
                bfa_sm_set_state(itnim, bfa_itnim_sm_offline);
                bfa_itnim_offline_cb(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_itnim_offline_cb(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

static void
bfa_itnim_sm_fwdelete_qfull(struct bfa_itnim_s *itnim,
                        enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_QRESUME:
                bfa_sm_set_state(itnim, bfa_itnim_sm_fwdelete);
                bfa_itnim_send_fwdelete(itnim);
                break;

        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_deleting_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                bfa_reqq_wcancel(&itnim->reqq_wait);
                bfa_itnim_offline_cb(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Offline state.
 */
static void
bfa_itnim_sm_offline(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_itnim_iotov_delete(itnim);
                bfa_fcpim_delitn(itnim);
                break;

        case BFA_ITNIM_SM_ONLINE:
                if (bfa_itnim_send_fwcreate(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_iocdisable);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

static void
bfa_itnim_sm_iocdisable(struct bfa_itnim_s *itnim,
                                enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_itnim_iotov_delete(itnim);
                bfa_fcpim_delitn(itnim);
                break;

        case BFA_ITNIM_SM_OFFLINE:
                bfa_itnim_offline_cb(itnim);
                break;

        case BFA_ITNIM_SM_ONLINE:
                if (bfa_itnim_send_fwcreate(itnim))
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate);
                else
                        bfa_sm_set_state(itnim, bfa_itnim_sm_fwcreate_qfull);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Itnim is deleted, waiting for firmware response to delete.
 */
static void
bfa_itnim_sm_deleting(struct bfa_itnim_s *itnim, enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_FWRSP:
        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_fcpim_delitn(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

static void
bfa_itnim_sm_deleting_qfull(struct bfa_itnim_s *itnim,
                enum bfa_itnim_event event)
{
        bfa_trc(itnim->bfa, itnim->rport->rport_tag);
        bfa_trc(itnim->bfa, event);

        switch (event) {
        case BFA_ITNIM_SM_QRESUME:
                bfa_sm_set_state(itnim, bfa_itnim_sm_deleting);
                bfa_itnim_send_fwdelete(itnim);
                break;

        case BFA_ITNIM_SM_HWFAIL:
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
                bfa_reqq_wcancel(&itnim->reqq_wait);
                bfa_fcpim_delitn(itnim);
                break;

        default:
                bfa_sm_fault(itnim->bfa, event);
        }
}

/*
 * Initiate cleanup of all IOs on an IOC failure.
 */
static void
bfa_itnim_iocdisable_cleanup(struct bfa_itnim_s *itnim)
{
        struct bfa_tskim_s *tskim;
        struct bfa_ioim_s *ioim;
        struct list_head        *qe, *qen;

        list_for_each_safe(qe, qen, &itnim->tsk_q) {
                tskim = (struct bfa_tskim_s *) qe;
                bfa_tskim_iocdisable(tskim);
        }

        list_for_each_safe(qe, qen, &itnim->io_q) {
                ioim = (struct bfa_ioim_s *) qe;
                bfa_ioim_iocdisable(ioim);
        }

        /*
         * For IO request in pending queue, we pretend an early timeout.
         */
        list_for_each_safe(qe, qen, &itnim->pending_q) {
                ioim = (struct bfa_ioim_s *) qe;
                bfa_ioim_tov(ioim);
        }

        list_for_each_safe(qe, qen, &itnim->io_cleanup_q) {
                ioim = (struct bfa_ioim_s *) qe;
                bfa_ioim_iocdisable(ioim);

        }
}

/*
 * IO cleanup completion
 */
static void
bfa_itnim_cleanp_comp(void *itnim_cbarg)
{
        struct bfa_itnim_s *itnim = itnim_cbarg;

        bfa_stats(itnim, cleanup_comps);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_CLEANUP);
}

/*
 * Initiate cleanup of all IOs.
 */
static void
bfa_itnim_cleanup(struct bfa_itnim_s *itnim)
{
        struct bfa_ioim_s  *ioim;
        struct bfa_tskim_s *tskim;
        struct list_head        *qe, *qen;

        bfa_wc_init(&itnim->wc, bfa_itnim_cleanp_comp, itnim);

        list_for_each_safe(qe, qen, &itnim->io_q) {
                ioim = (struct bfa_ioim_s *) qe;

                /*
                 * Move IO to a cleanup queue from active queue so that a later
                 * TM will not pickup this IO.
                 */
                list_del(&ioim->qe);
                list_add_tail(&ioim->qe, &itnim->io_cleanup_q);

                bfa_wc_up(&itnim->wc);
                bfa_ioim_cleanup(ioim);
        }

        list_for_each_safe(qe, qen, &itnim->tsk_q) {
                tskim = (struct bfa_tskim_s *) qe;
                bfa_wc_up(&itnim->wc);
                bfa_tskim_cleanup(tskim);
        }

        bfa_wc_wait(&itnim->wc);
}

static void
__bfa_cb_itnim_online(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_itnim_s *itnim = cbarg;

        if (complete)
                bfa_cb_itnim_online(itnim->ditn);
}

static void
__bfa_cb_itnim_offline(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_itnim_s *itnim = cbarg;

        if (complete)
                bfa_cb_itnim_offline(itnim->ditn);
}

static void
__bfa_cb_itnim_sler(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_itnim_s *itnim = cbarg;

        if (complete)
                bfa_cb_itnim_sler(itnim->ditn);
}

/*
 * Call to resume any I/O requests waiting for room in request queue.
 */
static void
bfa_itnim_qresume(void *cbarg)
{
        struct bfa_itnim_s *itnim = cbarg;

        bfa_sm_send_event(itnim, BFA_ITNIM_SM_QRESUME);
}

/*
 *  bfa_itnim_public
 */

void
bfa_itnim_iodone(struct bfa_itnim_s *itnim)
{
        bfa_wc_down(&itnim->wc);
}

void
bfa_itnim_tskdone(struct bfa_itnim_s *itnim)
{
        bfa_wc_down(&itnim->wc);
}

void
bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len)
{
        /*
         * ITN memory
         */
        *km_len += cfg->fwcfg.num_rports * sizeof(struct bfa_itnim_s);
}

void
bfa_itnim_attach(struct bfa_fcpim_s *fcpim)
{
        struct bfa_s    *bfa = fcpim->bfa;
        struct bfa_fcp_mod_s    *fcp = fcpim->fcp;
        struct bfa_itnim_s *itnim;
        int     i, j;

        INIT_LIST_HEAD(&fcpim->itnim_q);

        itnim = (struct bfa_itnim_s *) bfa_mem_kva_curp(fcp);
        fcpim->itnim_arr = itnim;

        for (i = 0; i < fcpim->num_itnims; i++, itnim++) {
                memset(itnim, 0, sizeof(struct bfa_itnim_s));
                itnim->bfa = bfa;
                itnim->fcpim = fcpim;
                itnim->reqq = BFA_REQQ_QOS_LO;
                itnim->rport = BFA_RPORT_FROM_TAG(bfa, i);
                itnim->iotov_active = BFA_FALSE;
                bfa_reqq_winit(&itnim->reqq_wait, bfa_itnim_qresume, itnim);

                INIT_LIST_HEAD(&itnim->io_q);
                INIT_LIST_HEAD(&itnim->io_cleanup_q);
                INIT_LIST_HEAD(&itnim->pending_q);
                INIT_LIST_HEAD(&itnim->tsk_q);
                INIT_LIST_HEAD(&itnim->delay_comp_q);
                for (j = 0; j < BFA_IOBUCKET_MAX; j++)
                        itnim->ioprofile.io_latency.min[j] = ~0;
                bfa_sm_set_state(itnim, bfa_itnim_sm_uninit);
        }

        bfa_mem_kva_curp(fcp) = (u8 *) itnim;
}

void
bfa_itnim_iocdisable(struct bfa_itnim_s *itnim)
{
        bfa_stats(itnim, ioc_disabled);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_HWFAIL);
}

static bfa_boolean_t
bfa_itnim_send_fwcreate(struct bfa_itnim_s *itnim)
{
        struct bfi_itn_create_req_s *m;

        itnim->msg_no++;

        /*
         * check for room in queue to send request now
         */
        m = bfa_reqq_next(itnim->bfa, itnim->reqq);
        if (!m) {
                bfa_reqq_wait(itnim->bfa, itnim->reqq, &itnim->reqq_wait);
                return BFA_FALSE;
        }

        bfi_h2i_set(m->mh, BFI_MC_ITN, BFI_ITN_H2I_CREATE_REQ,
                        bfa_fn_lpu(itnim->bfa));
        m->fw_handle = itnim->rport->fw_handle;
        m->class = FC_CLASS_3;
        m->seq_rec = itnim->seq_rec;
        m->msg_no = itnim->msg_no;
        bfa_stats(itnim, fw_create);

        /*
         * queue I/O message to firmware
         */
        bfa_reqq_produce(itnim->bfa, itnim->reqq, m->mh);
        return BFA_TRUE;
}

static bfa_boolean_t
bfa_itnim_send_fwdelete(struct bfa_itnim_s *itnim)
{
        struct bfi_itn_delete_req_s *m;

        /*
         * check for room in queue to send request now
         */
        m = bfa_reqq_next(itnim->bfa, itnim->reqq);
        if (!m) {
                bfa_reqq_wait(itnim->bfa, itnim->reqq, &itnim->reqq_wait);
                return BFA_FALSE;
        }

        bfi_h2i_set(m->mh, BFI_MC_ITN, BFI_ITN_H2I_DELETE_REQ,
                        bfa_fn_lpu(itnim->bfa));
        m->fw_handle = itnim->rport->fw_handle;
        bfa_stats(itnim, fw_delete);

        /*
         * queue I/O message to firmware
         */
        bfa_reqq_produce(itnim->bfa, itnim->reqq, m->mh);
        return BFA_TRUE;
}

/*
 * Cleanup all pending failed inflight requests.
 */
static void
bfa_itnim_delayed_comp(struct bfa_itnim_s *itnim, bfa_boolean_t iotov)
{
        struct bfa_ioim_s *ioim;
        struct list_head *qe, *qen;

        list_for_each_safe(qe, qen, &itnim->delay_comp_q) {
                ioim = (struct bfa_ioim_s *)qe;
                bfa_ioim_delayed_comp(ioim, iotov);
        }
}

/*
 * Start all pending IO requests.
 */
static void
bfa_itnim_iotov_online(struct bfa_itnim_s *itnim)
{
        struct bfa_ioim_s *ioim;

        bfa_itnim_iotov_stop(itnim);

        /*
         * Abort all inflight IO requests in the queue
         */
        bfa_itnim_delayed_comp(itnim, BFA_FALSE);

        /*
         * Start all pending IO requests.
         */
        while (!list_empty(&itnim->pending_q)) {
                bfa_q_deq(&itnim->pending_q, &ioim);
                list_add_tail(&ioim->qe, &itnim->io_q);
                bfa_ioim_start(ioim);
        }
}

/*
 * Fail all pending IO requests
 */
static void
bfa_itnim_iotov_cleanup(struct bfa_itnim_s *itnim)
{
        struct bfa_ioim_s *ioim;

        /*
         * Fail all inflight IO requests in the queue
         */
        bfa_itnim_delayed_comp(itnim, BFA_TRUE);

        /*
         * Fail any pending IO requests.
         */
        while (!list_empty(&itnim->pending_q)) {
                bfa_q_deq(&itnim->pending_q, &ioim);
                list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
                bfa_ioim_tov(ioim);
        }
}

/*
 * IO TOV timer callback. Fail any pending IO requests.
 */
static void
bfa_itnim_iotov(void *itnim_arg)
{
        struct bfa_itnim_s *itnim = itnim_arg;

        itnim->iotov_active = BFA_FALSE;

        bfa_cb_itnim_tov_begin(itnim->ditn);
        bfa_itnim_iotov_cleanup(itnim);
        bfa_cb_itnim_tov(itnim->ditn);
}

/*
 * Start IO TOV timer for failing back pending IO requests in offline state.
 */
static void
bfa_itnim_iotov_start(struct bfa_itnim_s *itnim)
{
        if (itnim->fcpim->path_tov > 0) {

                itnim->iotov_active = BFA_TRUE;
                WARN_ON(!bfa_itnim_hold_io(itnim));
                bfa_timer_start(itnim->bfa, &itnim->timer,
                        bfa_itnim_iotov, itnim, itnim->fcpim->path_tov);
        }
}

/*
 * Stop IO TOV timer.
 */
static void
bfa_itnim_iotov_stop(struct bfa_itnim_s *itnim)
{
        if (itnim->iotov_active) {
                itnim->iotov_active = BFA_FALSE;
                bfa_timer_stop(&itnim->timer);
        }
}

/*
 * Stop IO TOV timer.
 */
static void
bfa_itnim_iotov_delete(struct bfa_itnim_s *itnim)
{
        bfa_boolean_t pathtov_active = BFA_FALSE;

        if (itnim->iotov_active)
                pathtov_active = BFA_TRUE;

        bfa_itnim_iotov_stop(itnim);
        if (pathtov_active)
                bfa_cb_itnim_tov_begin(itnim->ditn);
        bfa_itnim_iotov_cleanup(itnim);
        if (pathtov_active)
                bfa_cb_itnim_tov(itnim->ditn);
}

static void
bfa_itnim_update_del_itn_stats(struct bfa_itnim_s *itnim)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(itnim->bfa);
        fcpim->del_itn_stats.del_itn_iocomp_aborted +=
                itnim->stats.iocomp_aborted;
        fcpim->del_itn_stats.del_itn_iocomp_timedout +=
                itnim->stats.iocomp_timedout;
        fcpim->del_itn_stats.del_itn_iocom_sqer_needed +=
                itnim->stats.iocom_sqer_needed;
        fcpim->del_itn_stats.del_itn_iocom_res_free +=
                itnim->stats.iocom_res_free;
        fcpim->del_itn_stats.del_itn_iocom_hostabrts +=
                itnim->stats.iocom_hostabrts;
        fcpim->del_itn_stats.del_itn_total_ios += itnim->stats.total_ios;
        fcpim->del_itn_stats.del_io_iocdowns += itnim->stats.io_iocdowns;
        fcpim->del_itn_stats.del_tm_iocdowns += itnim->stats.tm_iocdowns;
}

/*
 * bfa_itnim_public
 */

/*
 * Itnim interrupt processing.
 */
void
bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        union bfi_itn_i2h_msg_u msg;
        struct bfa_itnim_s *itnim;

        bfa_trc(bfa, m->mhdr.msg_id);

        msg.msg = m;

        switch (m->mhdr.msg_id) {
        case BFI_ITN_I2H_CREATE_RSP:
                itnim = BFA_ITNIM_FROM_TAG(fcpim,
                                                msg.create_rsp->bfa_handle);
                WARN_ON(msg.create_rsp->status != BFA_STATUS_OK);
                bfa_stats(itnim, create_comps);
                bfa_sm_send_event(itnim, BFA_ITNIM_SM_FWRSP);
                break;

        case BFI_ITN_I2H_DELETE_RSP:
                itnim = BFA_ITNIM_FROM_TAG(fcpim,
                                                msg.delete_rsp->bfa_handle);
                WARN_ON(msg.delete_rsp->status != BFA_STATUS_OK);
                bfa_stats(itnim, delete_comps);
                bfa_sm_send_event(itnim, BFA_ITNIM_SM_FWRSP);
                break;

        case BFI_ITN_I2H_SLER_EVENT:
                itnim = BFA_ITNIM_FROM_TAG(fcpim,
                                                msg.sler_event->bfa_handle);
                bfa_stats(itnim, sler_events);
                bfa_sm_send_event(itnim, BFA_ITNIM_SM_SLER);
                break;

        default:
                bfa_trc(bfa, m->mhdr.msg_id);
                WARN_ON(1);
        }
}

/*
 * bfa_itnim_api
 */

struct bfa_itnim_s *
bfa_itnim_create(struct bfa_s *bfa, struct bfa_rport_s *rport, void *ditn)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct bfa_itnim_s *itnim;

        bfa_itn_create(bfa, rport, bfa_itnim_isr);

        itnim = BFA_ITNIM_FROM_TAG(fcpim, rport->rport_tag);
        WARN_ON(itnim->rport != rport);

        itnim->ditn = ditn;

        bfa_stats(itnim, creates);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_CREATE);

        return itnim;
}

void
bfa_itnim_delete(struct bfa_itnim_s *itnim)
{
        bfa_stats(itnim, deletes);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_DELETE);
}

void
bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec)
{
        itnim->seq_rec = seq_rec;
        bfa_stats(itnim, onlines);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_ONLINE);
}

void
bfa_itnim_offline(struct bfa_itnim_s *itnim)
{
        bfa_stats(itnim, offlines);
        bfa_sm_send_event(itnim, BFA_ITNIM_SM_OFFLINE);
}

/*
 * Return true if itnim is considered offline for holding off IO request.
 * IO is not held if itnim is being deleted.
 */
bfa_boolean_t
bfa_itnim_hold_io(struct bfa_itnim_s *itnim)
{
        return itnim->fcpim->path_tov && itnim->iotov_active &&
                (bfa_sm_cmp_state(itnim, bfa_itnim_sm_fwcreate) ||
                 bfa_sm_cmp_state(itnim, bfa_itnim_sm_sler) ||
                 bfa_sm_cmp_state(itnim, bfa_itnim_sm_cleanup_offline) ||
                 bfa_sm_cmp_state(itnim, bfa_itnim_sm_fwdelete) ||
                 bfa_sm_cmp_state(itnim, bfa_itnim_sm_offline) ||
                 bfa_sm_cmp_state(itnim, bfa_itnim_sm_iocdisable));
}

#define bfa_io_lat_clock_res_div        HZ
#define bfa_io_lat_clock_res_mul        1000
bfa_status_t
bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
                        struct bfa_itnim_ioprofile_s *ioprofile)
{
        struct bfa_fcpim_s *fcpim;

        if (!itnim)
                return BFA_STATUS_NO_FCPIM_NEXUS;

        fcpim = BFA_FCPIM(itnim->bfa);

        if (!fcpim->io_profile)
                return BFA_STATUS_IOPROFILE_OFF;

        itnim->ioprofile.index = BFA_IOBUCKET_MAX;
        itnim->ioprofile.io_profile_start_time =
                                bfa_io_profile_start_time(itnim->bfa);
        itnim->ioprofile.clock_res_mul = bfa_io_lat_clock_res_mul;
        itnim->ioprofile.clock_res_div = bfa_io_lat_clock_res_div;
        *ioprofile = itnim->ioprofile;

        return BFA_STATUS_OK;
}

void
bfa_itnim_clear_stats(struct bfa_itnim_s *itnim)
{
        int j;

        if (!itnim)
                return;

        memset(&itnim->stats, 0, sizeof(itnim->stats));
        memset(&itnim->ioprofile, 0, sizeof(itnim->ioprofile));
        for (j = 0; j < BFA_IOBUCKET_MAX; j++)
                itnim->ioprofile.io_latency.min[j] = ~0;
}

/*
 *  BFA IO module state machine functions
 */

/*
 * IO is not started (unallocated).
 */
static void
bfa_ioim_sm_uninit(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        switch (event) {
        case BFA_IOIM_SM_START:
                if (!bfa_itnim_is_online(ioim->itnim)) {
                        if (!bfa_itnim_hold_io(ioim->itnim)) {
                                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                                list_del(&ioim->qe);
                                list_add_tail(&ioim->qe,
                                        &ioim->fcpim->ioim_comp_q);
                                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                                                __bfa_cb_ioim_pathtov, ioim);
                        } else {
                                list_del(&ioim->qe);
                                list_add_tail(&ioim->qe,
                                        &ioim->itnim->pending_q);
                        }
                        break;
                }

                if (ioim->nsges > BFI_SGE_INLINE) {
                        if (!bfa_ioim_sgpg_alloc(ioim)) {
                                bfa_sm_set_state(ioim, bfa_ioim_sm_sgalloc);
                                return;
                        }
                }

                if (!bfa_ioim_send_ioreq(ioim)) {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
                        break;
                }

                bfa_sm_set_state(ioim, bfa_ioim_sm_active);
                break;

        case BFA_IOIM_SM_IOTOV:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                                __bfa_cb_ioim_pathtov, ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                /*
                 * IO in pending queue can get abort requests. Complete abort
                 * requests immediately.
                 */
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                WARN_ON(!bfa_q_is_on_q(&ioim->itnim->pending_q, ioim));
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                        __bfa_cb_ioim_abort, ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is waiting for SG pages.
 */
static void
bfa_ioim_sm_sgalloc(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_SGALLOCED:
                if (!bfa_ioim_send_ioreq(ioim)) {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
                        break;
                }
                bfa_sm_set_state(ioim, bfa_ioim_sm_active);
                break;

        case BFA_IOIM_SM_CLEANUP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_sgpg_wcancel(ioim->bfa, &ioim->iosp->sgpg_wqe);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is active.
 */
static void
bfa_ioim_sm_active(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        switch (event) {
        case BFA_IOIM_SM_COMP_GOOD:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                              __bfa_cb_ioim_good_comp, ioim);
                break;

        case BFA_IOIM_SM_COMP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
                              ioim);
                break;

        case BFA_IOIM_SM_DONE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_comp,
                              ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                ioim->iosp->abort_explicit = BFA_TRUE;
                ioim->io_cbfn = __bfa_cb_ioim_abort;

                if (bfa_ioim_send_abort(ioim))
                        bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
                else {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_abort_qfull);
                        bfa_stats(ioim->itnim, qwait);
                        bfa_reqq_wait(ioim->bfa, ioim->reqq,
                                          &ioim->iosp->reqq_wait);
                }
                break;

        case BFA_IOIM_SM_CLEANUP:
                ioim->iosp->abort_explicit = BFA_FALSE;
                ioim->io_cbfn = __bfa_cb_ioim_failed;

                if (bfa_ioim_send_abort(ioim))
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
                else {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
                        bfa_stats(ioim->itnim, qwait);
                        bfa_reqq_wait(ioim->bfa, ioim->reqq,
                                          &ioim->iosp->reqq_wait);
                }
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        case BFA_IOIM_SM_SQRETRY:
                if (bfa_ioim_maxretry_reached(ioim)) {
                        /* max retry reached, free IO */
                        bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                        bfa_ioim_move_to_comp_q(ioim);
                        bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                                        __bfa_cb_ioim_failed, ioim);
                        break;
                }
                /* waiting for IO tag resource free */
                bfa_sm_set_state(ioim, bfa_ioim_sm_cmnd_retry);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is retried with new tag.
 */
static void
bfa_ioim_sm_cmnd_retry(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        switch (event) {
        case BFA_IOIM_SM_FREE:
                /* abts and rrq done. Now retry the IO with new tag */
                bfa_ioim_update_iotag(ioim);
                if (!bfa_ioim_send_ioreq(ioim)) {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_qfull);
                        break;
                }
                bfa_sm_set_state(ioim, bfa_ioim_sm_active);
        break;

        case BFA_IOIM_SM_CLEANUP:
                ioim->iosp->abort_explicit = BFA_FALSE;
                ioim->io_cbfn = __bfa_cb_ioim_failed;

                if (bfa_ioim_send_abort(ioim))
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
                else {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
                        bfa_stats(ioim->itnim, qwait);
                        bfa_reqq_wait(ioim->bfa, ioim->reqq,
                                          &ioim->iosp->reqq_wait);
                }
        break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe,
                         __bfa_cb_ioim_failed, ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                /* in this state IO abort is done.
                 * Waiting for IO tag resource free.
                 */
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is being aborted, waiting for completion from firmware.
 */
static void
bfa_ioim_sm_abort(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_COMP_GOOD:
        case BFA_IOIM_SM_COMP:
        case BFA_IOIM_SM_DONE:
        case BFA_IOIM_SM_FREE:
                break;

        case BFA_IOIM_SM_ABORT_DONE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_ABORT_COMP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_COMP_UTAG:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                WARN_ON(ioim->iosp->abort_explicit != BFA_TRUE);
                ioim->iosp->abort_explicit = BFA_FALSE;

                if (bfa_ioim_send_abort(ioim))
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
                else {
                        bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
                        bfa_stats(ioim->itnim, qwait);
                        bfa_reqq_wait(ioim->bfa, ioim->reqq,
                                          &ioim->iosp->reqq_wait);
                }
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is being cleaned up (implicit abort), waiting for completion from
 * firmware.
 */
static void
bfa_ioim_sm_cleanup(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_COMP_GOOD:
        case BFA_IOIM_SM_COMP:
        case BFA_IOIM_SM_DONE:
        case BFA_IOIM_SM_FREE:
                break;

        case BFA_IOIM_SM_ABORT:
                /*
                 * IO is already being aborted implicitly
                 */
                ioim->io_cbfn = __bfa_cb_ioim_abort;
                break;

        case BFA_IOIM_SM_ABORT_DONE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_ABORT_COMP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_COMP_UTAG:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                /*
                 * IO can be in cleanup state already due to TM command.
                 * 2nd cleanup request comes from ITN offline event.
                 */
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is waiting for room in request CQ
 */
static void
bfa_ioim_sm_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_QRESUME:
                bfa_sm_set_state(ioim, bfa_ioim_sm_active);
                bfa_ioim_send_ioreq(ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * Active IO is being aborted, waiting for room in request CQ.
 */
static void
bfa_ioim_sm_abort_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_QRESUME:
                bfa_sm_set_state(ioim, bfa_ioim_sm_abort);
                bfa_ioim_send_abort(ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                WARN_ON(ioim->iosp->abort_explicit != BFA_TRUE);
                ioim->iosp->abort_explicit = BFA_FALSE;
                bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup_qfull);
                break;

        case BFA_IOIM_SM_COMP_GOOD:
        case BFA_IOIM_SM_COMP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_DONE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_abort,
                              ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * Active IO is being cleaned up, waiting for room in request CQ.
 */
static void
bfa_ioim_sm_cleanup_qfull(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_QRESUME:
                bfa_sm_set_state(ioim, bfa_ioim_sm_cleanup);
                bfa_ioim_send_abort(ioim);
                break;

        case BFA_IOIM_SM_ABORT:
                /*
                 * IO is already being cleaned up implicitly
                 */
                ioim->io_cbfn = __bfa_cb_ioim_abort;
                break;

        case BFA_IOIM_SM_COMP_GOOD:
        case BFA_IOIM_SM_COMP:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_DONE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb_free);

                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                bfa_reqq_wcancel(&ioim->iosp->reqq_wait);
                bfa_ioim_move_to_comp_q(ioim);
                bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, __bfa_cb_ioim_failed,
                              ioim);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO bfa callback is pending.
 */
static void
bfa_ioim_sm_hcb(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        switch (event) {
        case BFA_IOIM_SM_HCB:
                bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
                bfa_ioim_free(ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO bfa callback is pending. IO resource cannot be freed.
 */
static void
bfa_ioim_sm_hcb_free(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_HCB:
                bfa_sm_set_state(ioim, bfa_ioim_sm_resfree);
                list_del(&ioim->qe);
                list_add_tail(&ioim->qe, &ioim->fcpim->ioim_resfree_q);
                break;

        case BFA_IOIM_SM_FREE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                break;

        case BFA_IOIM_SM_CLEANUP:
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                bfa_sm_set_state(ioim, bfa_ioim_sm_hcb);
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * IO is completed, waiting resource free from firmware.
 */
static void
bfa_ioim_sm_resfree(struct bfa_ioim_s *ioim, enum bfa_ioim_event event)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, event);

        switch (event) {
        case BFA_IOIM_SM_FREE:
                bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
                bfa_ioim_free(ioim);
                break;

        case BFA_IOIM_SM_CLEANUP:
                bfa_ioim_notify_cleanup(ioim);
                break;

        case BFA_IOIM_SM_HWFAIL:
                break;

        default:
                bfa_sm_fault(ioim->bfa, event);
        }
}

/*
 * This is called from bfa_fcpim_start after the bfa_init() with flash read
 * is complete by driver. now invalidate the stale content of lun mask
 * like unit attention, rp tag and lp tag.
 */
static void
bfa_ioim_lm_init(struct bfa_s *bfa)
{
        struct bfa_lun_mask_s *lunm_list;
        int     i;

        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return;

        lunm_list = bfa_get_lun_mask_list(bfa);
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                lunm_list[i].ua = BFA_IOIM_LM_UA_RESET;
                lunm_list[i].lp_tag = BFA_LP_TAG_INVALID;
                lunm_list[i].rp_tag = BFA_RPORT_TAG_INVALID;
        }
}

static void
__bfa_cb_ioim_good_comp(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_ioim_s *ioim = cbarg;

        if (!complete) {
                bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
                return;
        }

        bfa_cb_ioim_good_comp(ioim->bfa->bfad, ioim->dio);
}

static void
__bfa_cb_ioim_comp(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_ioim_s       *ioim = cbarg;
        struct bfi_ioim_rsp_s *m;
        u8      *snsinfo = NULL;
        u8      sns_len = 0;
        s32     residue = 0;

        if (!complete) {
                bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
                return;
        }

        m = (struct bfi_ioim_rsp_s *) &ioim->iosp->comp_rspmsg;
        if (m->io_status == BFI_IOIM_STS_OK) {
                /*
                 * setup sense information, if present
                 */
                if ((m->scsi_status == SCSI_STATUS_CHECK_CONDITION) &&
                                        m->sns_len) {
                        sns_len = m->sns_len;
                        snsinfo = BFA_SNSINFO_FROM_TAG(ioim->fcpim->fcp,
                                                ioim->iotag);
                }

                /*
                 * setup residue value correctly for normal completions
                 */
                if (m->resid_flags == FCP_RESID_UNDER) {
                        residue = be32_to_cpu(m->residue);
                        bfa_stats(ioim->itnim, iocomp_underrun);
                }
                if (m->resid_flags == FCP_RESID_OVER) {
                        residue = be32_to_cpu(m->residue);
                        residue = -residue;
                        bfa_stats(ioim->itnim, iocomp_overrun);
                }
        }

        bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, m->io_status,
                          m->scsi_status, sns_len, snsinfo, residue);
}

void
bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn, wwn_t rp_wwn,
                        u16 rp_tag, u8 lp_tag)
{
        struct bfa_lun_mask_s *lun_list;
        u8      i;

        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return;

        lun_list = bfa_get_lun_mask_list(bfa);
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE) {
                        if ((lun_list[i].lp_wwn == lp_wwn) &&
                            (lun_list[i].rp_wwn == rp_wwn)) {
                                lun_list[i].rp_tag = rp_tag;
                                lun_list[i].lp_tag = lp_tag;
                        }
                }
        }
}

/*
 * set UA for all active luns in LM DB
 */
static void
bfa_ioim_lm_set_ua(struct bfa_s *bfa)
{
        struct bfa_lun_mask_s   *lunm_list;
        int     i;

        lunm_list = bfa_get_lun_mask_list(bfa);
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if (lunm_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
                        continue;
                lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
        }
}

bfa_status_t
bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 update)
{
        struct bfa_lunmask_cfg_s        *lun_mask;

        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return BFA_STATUS_FAILED;

        if (bfa_get_lun_mask_status(bfa) == update)
                return BFA_STATUS_NO_CHANGE;

        lun_mask = bfa_get_lun_mask(bfa);
        lun_mask->status = update;

        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED)
                bfa_ioim_lm_set_ua(bfa);

        return  bfa_dconf_update(bfa);
}

bfa_status_t
bfa_fcpim_lunmask_clear(struct bfa_s *bfa)
{
        int i;
        struct bfa_lun_mask_s   *lunm_list;

        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return BFA_STATUS_FAILED;

        lunm_list = bfa_get_lun_mask_list(bfa);
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if (lunm_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE) {
                        if (lunm_list[i].rp_tag != BFA_RPORT_TAG_INVALID)
                                bfa_rport_unset_lunmask(bfa,
                                  BFA_RPORT_FROM_TAG(bfa, lunm_list[i].rp_tag));
                }
        }

        memset(lunm_list, 0, sizeof(struct bfa_lun_mask_s) * MAX_LUN_MASK_CFG);
        return bfa_dconf_update(bfa);
}

bfa_status_t
bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf)
{
        struct bfa_lunmask_cfg_s *lun_mask;

        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return BFA_STATUS_FAILED;

        lun_mask = bfa_get_lun_mask(bfa);
        memcpy(buf, lun_mask, sizeof(struct bfa_lunmask_cfg_s));
        return BFA_STATUS_OK;
}

bfa_status_t
bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
                      wwn_t rpwwn, struct scsi_lun lun)
{
        struct bfa_lun_mask_s *lunm_list;
        struct bfa_rport_s *rp = NULL;
        int i, free_index = MAX_LUN_MASK_CFG + 1;
        struct bfa_fcs_lport_s *port = NULL;
        struct bfa_fcs_rport_s *rp_fcs;

        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return BFA_STATUS_FAILED;

        port = bfa_fcs_lookup_port(&((struct bfad_s *)bfa->bfad)->bfa_fcs,
                                   vf_id, *pwwn);
        if (port) {
                *pwwn = port->port_cfg.pwwn;
                rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
                if (rp_fcs)
                        rp = rp_fcs->bfa_rport;
        }

        lunm_list = bfa_get_lun_mask_list(bfa);
        /* if entry exists */
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if (lunm_list[i].state != BFA_IOIM_LUN_MASK_ACTIVE)
                        free_index = i;
                if ((lunm_list[i].lp_wwn == *pwwn) &&
                    (lunm_list[i].rp_wwn == rpwwn) &&
                    (scsilun_to_int((struct scsi_lun *)&lunm_list[i].lun) ==
                     scsilun_to_int((struct scsi_lun *)&lun)))
                        return  BFA_STATUS_ENTRY_EXISTS;
        }

        if (free_index > MAX_LUN_MASK_CFG)
                return BFA_STATUS_MAX_ENTRY_REACHED;

        if (rp) {
                lunm_list[free_index].lp_tag = bfa_lps_get_tag_from_pid(bfa,
                                                   rp->rport_info.local_pid);
                lunm_list[free_index].rp_tag = rp->rport_tag;
        } else {
                lunm_list[free_index].lp_tag = BFA_LP_TAG_INVALID;
                lunm_list[free_index].rp_tag = BFA_RPORT_TAG_INVALID;
        }

        lunm_list[free_index].lp_wwn = *pwwn;
        lunm_list[free_index].rp_wwn = rpwwn;
        lunm_list[free_index].lun = lun;
        lunm_list[free_index].state = BFA_IOIM_LUN_MASK_ACTIVE;

        /* set for all luns in this rp */
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if ((lunm_list[i].lp_wwn == *pwwn) &&
                    (lunm_list[i].rp_wwn == rpwwn))
                        lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
        }

        return bfa_dconf_update(bfa);
}

bfa_status_t
bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
                         wwn_t rpwwn, struct scsi_lun lun)
{
        struct bfa_lun_mask_s   *lunm_list;
        struct bfa_rport_s      *rp = NULL;
        struct bfa_fcs_lport_s *port = NULL;
        struct bfa_fcs_rport_s *rp_fcs;
        int     i;

        /* in min cfg lunm_list could be NULL but  no commands should run. */
        if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_MINCFG)
                return BFA_STATUS_FAILED;

        bfa_trc(bfa, bfa_get_lun_mask_status(bfa));
        bfa_trc(bfa, *pwwn);
        bfa_trc(bfa, rpwwn);
        bfa_trc(bfa, scsilun_to_int((struct scsi_lun *)&lun));

        if (*pwwn == 0) {
                port = bfa_fcs_lookup_port(
                                &((struct bfad_s *)bfa->bfad)->bfa_fcs,
                                vf_id, *pwwn);
                if (port) {
                        *pwwn = port->port_cfg.pwwn;
                        rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
                        if (rp_fcs)
                                rp = rp_fcs->bfa_rport;
                }
        }

        lunm_list = bfa_get_lun_mask_list(bfa);
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if ((lunm_list[i].lp_wwn == *pwwn) &&
                    (lunm_list[i].rp_wwn == rpwwn) &&
                    (scsilun_to_int((struct scsi_lun *)&lunm_list[i].lun) ==
                     scsilun_to_int((struct scsi_lun *)&lun))) {
                        lunm_list[i].lp_wwn = 0;
                        lunm_list[i].rp_wwn = 0;
                        int_to_scsilun(0, &lunm_list[i].lun);
                        lunm_list[i].state = BFA_IOIM_LUN_MASK_INACTIVE;
                        if (lunm_list[i].rp_tag != BFA_RPORT_TAG_INVALID) {
                                lunm_list[i].rp_tag = BFA_RPORT_TAG_INVALID;
                                lunm_list[i].lp_tag = BFA_LP_TAG_INVALID;
                        }
                        return bfa_dconf_update(bfa);
                }
        }

        /* set for all luns in this rp */
        for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
                if ((lunm_list[i].lp_wwn == *pwwn) &&
                    (lunm_list[i].rp_wwn == rpwwn))
                        lunm_list[i].ua = BFA_IOIM_LM_UA_SET;
        }

        return BFA_STATUS_ENTRY_NOT_EXISTS;
}

static void
__bfa_cb_ioim_failed(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_ioim_s *ioim = cbarg;

        if (!complete) {
                bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
                return;
        }

        bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_ABORTED,
                          0, 0, NULL, 0);
}

static void
__bfa_cb_ioim_pathtov(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_ioim_s *ioim = cbarg;

        bfa_stats(ioim->itnim, path_tov_expired);
        if (!complete) {
                bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
                return;
        }

        bfa_cb_ioim_done(ioim->bfa->bfad, ioim->dio, BFI_IOIM_STS_PATHTOV,
                          0, 0, NULL, 0);
}

static void
__bfa_cb_ioim_abort(void *cbarg, bfa_boolean_t complete)
{
        struct bfa_ioim_s *ioim = cbarg;

        if (!complete) {
                bfa_sm_send_event(ioim, BFA_IOIM_SM_HCB);
                return;
        }

        bfa_cb_ioim_abort(ioim->bfa->bfad, ioim->dio);
}

static void
bfa_ioim_sgpg_alloced(void *cbarg)
{
        struct bfa_ioim_s *ioim = cbarg;

        ioim->nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
        list_splice_tail_init(&ioim->iosp->sgpg_wqe.sgpg_q, &ioim->sgpg_q);
        ioim->sgpg = bfa_q_first(&ioim->sgpg_q);
        bfa_sm_send_event(ioim, BFA_IOIM_SM_SGALLOCED);
}

/*
 * Send I/O request to firmware.
 */
static  bfa_boolean_t
bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim)
{
        struct bfa_itnim_s *itnim = ioim->itnim;
        struct bfi_ioim_req_s *m;
        static struct fcp_cmnd_s cmnd_z0 = { { { 0 } } };
        struct bfi_sge_s *sge, *sgpge;
        u32     pgdlen = 0;
        u32     fcp_dl;
        u64 addr;
        struct scatterlist *sg;
        struct bfa_sgpg_s *sgpg;
        struct scsi_cmnd *cmnd = (struct scsi_cmnd *) ioim->dio;
        u32 i, sge_id, pgcumsz;
        enum dma_data_direction dmadir;

        /*
         * check for room in queue to send request now
         */
        m = bfa_reqq_next(ioim->bfa, ioim->reqq);
        if (!m) {
                bfa_stats(ioim->itnim, qwait);
                bfa_reqq_wait(ioim->bfa, ioim->reqq,
                                  &ioim->iosp->reqq_wait);
                return BFA_FALSE;
        }

        /*
         * build i/o request message next
         */
        m->io_tag = cpu_to_be16(ioim->iotag);
        m->rport_hdl = ioim->itnim->rport->fw_handle;
        m->io_timeout = 0;

        sge = &m->sges[0];
        sgpg = ioim->sgpg;
        sge_id = 0;
        sgpge = NULL;
        pgcumsz = 0;
        scsi_for_each_sg(cmnd, sg, ioim->nsges, i) {
                if (i == 0) {
                        /* build inline IO SG element */
                        addr = bfa_sgaddr_le(sg_dma_address(sg));
                        sge->sga = *(union bfi_addr_u *) &addr;
                        pgdlen = sg_dma_len(sg);
                        sge->sg_len = pgdlen;
                        sge->flags = (ioim->nsges > BFI_SGE_INLINE) ?
                                        BFI_SGE_DATA_CPL : BFI_SGE_DATA_LAST;
                        bfa_sge_to_be(sge);
                        sge++;
                } else {
                        if (sge_id == 0)
                                sgpge = sgpg->sgpg->sges;

                        addr = bfa_sgaddr_le(sg_dma_address(sg));
                        sgpge->sga = *(union bfi_addr_u *) &addr;
                        sgpge->sg_len = sg_dma_len(sg);
                        pgcumsz += sgpge->sg_len;

                        /* set flags */
                        if (i < (ioim->nsges - 1) &&
                                        sge_id < (BFI_SGPG_DATA_SGES - 1))
                                sgpge->flags = BFI_SGE_DATA;
                        else if (i < (ioim->nsges - 1))
                                sgpge->flags = BFI_SGE_DATA_CPL;
                        else
                                sgpge->flags = BFI_SGE_DATA_LAST;

                        bfa_sge_to_le(sgpge);

                        sgpge++;
                        if (i == (ioim->nsges - 1)) {
                                sgpge->flags = BFI_SGE_PGDLEN;
                                sgpge->sga.a32.addr_lo = 0;
                                sgpge->sga.a32.addr_hi = 0;
                                sgpge->sg_len = pgcumsz;
                                bfa_sge_to_le(sgpge);
                        } else if (++sge_id == BFI_SGPG_DATA_SGES) {
                                sgpg = (struct bfa_sgpg_s *) bfa_q_next(sgpg);
                                sgpge->flags = BFI_SGE_LINK;
                                sgpge->sga = sgpg->sgpg_pa;
                                sgpge->sg_len = pgcumsz;
                                bfa_sge_to_le(sgpge);
                                sge_id = 0;
                                pgcumsz = 0;
                        }
                }
        }

        if (ioim->nsges > BFI_SGE_INLINE) {
                sge->sga = ioim->sgpg->sgpg_pa;
        } else {
                sge->sga.a32.addr_lo = 0;
                sge->sga.a32.addr_hi = 0;
        }
        sge->sg_len = pgdlen;
        sge->flags = BFI_SGE_PGDLEN;
        bfa_sge_to_be(sge);

        /*
         * set up I/O command parameters
         */
        m->cmnd = cmnd_z0;
        int_to_scsilun(cmnd->device->lun, &m->cmnd.lun);
        dmadir = cmnd->sc_data_direction;
        if (dmadir == DMA_TO_DEVICE)
                m->cmnd.iodir = FCP_IODIR_WRITE;
        else if (dmadir == DMA_FROM_DEVICE)
                m->cmnd.iodir = FCP_IODIR_READ;
        else
                m->cmnd.iodir = FCP_IODIR_NONE;

        m->cmnd.cdb = *(struct scsi_cdb_s *) cmnd->cmnd;
        fcp_dl = scsi_bufflen(cmnd);
        m->cmnd.fcp_dl = cpu_to_be32(fcp_dl);

        /*
         * set up I/O message header
         */
        switch (m->cmnd.iodir) {
        case FCP_IODIR_READ:
                bfi_h2i_set(m->mh, BFI_MC_IOIM_READ, 0, bfa_fn_lpu(ioim->bfa));
                bfa_stats(itnim, input_reqs);
                ioim->itnim->stats.rd_throughput += fcp_dl;
                break;
        case FCP_IODIR_WRITE:
                bfi_h2i_set(m->mh, BFI_MC_IOIM_WRITE, 0, bfa_fn_lpu(ioim->bfa));
                bfa_stats(itnim, output_reqs);
                ioim->itnim->stats.wr_throughput += fcp_dl;
                break;
        case FCP_IODIR_RW:
                bfa_stats(itnim, input_reqs);
                bfa_stats(itnim, output_reqs);
        default:
                bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_fn_lpu(ioim->bfa));
        }
        if (itnim->seq_rec ||
            (scsi_bufflen(cmnd) & (sizeof(u32) - 1)))
                bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_fn_lpu(ioim->bfa));

        /*
         * queue I/O message to firmware
         */
        bfa_reqq_produce(ioim->bfa, ioim->reqq, m->mh);
        return BFA_TRUE;
}

/*
 * Setup any additional SG pages needed.Inline SG element is setup
 * at queuing time.
 */
static bfa_boolean_t
bfa_ioim_sgpg_alloc(struct bfa_ioim_s *ioim)
{
        u16     nsgpgs;

        WARN_ON(ioim->nsges <= BFI_SGE_INLINE);

        /*
         * allocate SG pages needed
         */
        nsgpgs = BFA_SGPG_NPAGE(ioim->nsges);
        if (!nsgpgs)
                return BFA_TRUE;

        if (bfa_sgpg_malloc(ioim->bfa, &ioim->sgpg_q, nsgpgs)
            != BFA_STATUS_OK) {
                bfa_sgpg_wait(ioim->bfa, &ioim->iosp->sgpg_wqe, nsgpgs);
                return BFA_FALSE;
        }

        ioim->nsgpgs = nsgpgs;
        ioim->sgpg = bfa_q_first(&ioim->sgpg_q);

        return BFA_TRUE;
}

/*
 * Send I/O abort request to firmware.
 */
static  bfa_boolean_t
bfa_ioim_send_abort(struct bfa_ioim_s *ioim)
{
        struct bfi_ioim_abort_req_s *m;
        enum bfi_ioim_h2i       msgop;

        /*
         * check for room in queue to send request now
         */
        m = bfa_reqq_next(ioim->bfa, ioim->reqq);
        if (!m)
                return BFA_FALSE;

        /*
         * build i/o request message next
         */
        if (ioim->iosp->abort_explicit)
                msgop = BFI_IOIM_H2I_IOABORT_REQ;
        else
                msgop = BFI_IOIM_H2I_IOCLEANUP_REQ;

        bfi_h2i_set(m->mh, BFI_MC_IOIM, msgop, bfa_fn_lpu(ioim->bfa));
        m->io_tag    = cpu_to_be16(ioim->iotag);
        m->abort_tag = ++ioim->abort_tag;

        /*
         * queue I/O message to firmware
         */
        bfa_reqq_produce(ioim->bfa, ioim->reqq, m->mh);
        return BFA_TRUE;
}

/*
 * Call to resume any I/O requests waiting for room in request queue.
 */
static void
bfa_ioim_qresume(void *cbarg)
{
        struct bfa_ioim_s *ioim = cbarg;

        bfa_stats(ioim->itnim, qresumes);
        bfa_sm_send_event(ioim, BFA_IOIM_SM_QRESUME);
}


static void
bfa_ioim_notify_cleanup(struct bfa_ioim_s *ioim)
{
        /*
         * Move IO from itnim queue to fcpim global queue since itnim will be
         * freed.
         */
        list_del(&ioim->qe);
        list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);

        if (!ioim->iosp->tskim) {
                if (ioim->fcpim->delay_comp && ioim->itnim->iotov_active) {
                        bfa_cb_dequeue(&ioim->hcb_qe);
                        list_del(&ioim->qe);
                        list_add_tail(&ioim->qe, &ioim->itnim->delay_comp_q);
                }
                bfa_itnim_iodone(ioim->itnim);
        } else
                bfa_wc_down(&ioim->iosp->tskim->wc);
}

static bfa_boolean_t
bfa_ioim_is_abortable(struct bfa_ioim_s *ioim)
{
        if ((bfa_sm_cmp_state(ioim, bfa_ioim_sm_uninit) &&
            (!bfa_q_is_on_q(&ioim->itnim->pending_q, ioim)))    ||
            (bfa_sm_cmp_state(ioim, bfa_ioim_sm_abort))         ||
            (bfa_sm_cmp_state(ioim, bfa_ioim_sm_abort_qfull))   ||
            (bfa_sm_cmp_state(ioim, bfa_ioim_sm_hcb))           ||
            (bfa_sm_cmp_state(ioim, bfa_ioim_sm_hcb_free))      ||
            (bfa_sm_cmp_state(ioim, bfa_ioim_sm_resfree)))
                return BFA_FALSE;

        return BFA_TRUE;
}

void
bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim, bfa_boolean_t iotov)
{
        /*
         * If path tov timer expired, failback with PATHTOV status - these
         * IO requests are not normally retried by IO stack.
         *
         * Otherwise device cameback online and fail it with normal failed
         * status so that IO stack retries these failed IO requests.
         */
        if (iotov)
                ioim->io_cbfn = __bfa_cb_ioim_pathtov;
        else {
                ioim->io_cbfn = __bfa_cb_ioim_failed;
                bfa_stats(ioim->itnim, iocom_nexus_abort);
        }
        bfa_cb_queue(ioim->bfa, &ioim->hcb_qe, ioim->io_cbfn, ioim);

        /*
         * Move IO to fcpim global queue since itnim will be
         * freed.
         */
        list_del(&ioim->qe);
        list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
}


/*
 * Memory allocation and initialization.
 */
void
bfa_ioim_attach(struct bfa_fcpim_s *fcpim)
{
        struct bfa_ioim_s               *ioim;
        struct bfa_fcp_mod_s    *fcp = fcpim->fcp;
        struct bfa_ioim_sp_s    *iosp;
        u16             i;

        /*
         * claim memory first
         */
        ioim = (struct bfa_ioim_s *) bfa_mem_kva_curp(fcp);
        fcpim->ioim_arr = ioim;
        bfa_mem_kva_curp(fcp) = (u8 *) (ioim + fcpim->fcp->num_ioim_reqs);

        iosp = (struct bfa_ioim_sp_s *) bfa_mem_kva_curp(fcp);
        fcpim->ioim_sp_arr = iosp;
        bfa_mem_kva_curp(fcp) = (u8 *) (iosp + fcpim->fcp->num_ioim_reqs);

        /*
         * Initialize ioim free queues
         */
        INIT_LIST_HEAD(&fcpim->ioim_resfree_q);
        INIT_LIST_HEAD(&fcpim->ioim_comp_q);

        for (i = 0; i < fcpim->fcp->num_ioim_reqs;
             i++, ioim++, iosp++) {
                /*
                 * initialize IOIM
                 */
                memset(ioim, 0, sizeof(struct bfa_ioim_s));
                ioim->iotag   = i;
                ioim->bfa     = fcpim->bfa;
                ioim->fcpim   = fcpim;
                ioim->iosp    = iosp;
                INIT_LIST_HEAD(&ioim->sgpg_q);
                bfa_reqq_winit(&ioim->iosp->reqq_wait,
                                   bfa_ioim_qresume, ioim);
                bfa_sgpg_winit(&ioim->iosp->sgpg_wqe,
                                   bfa_ioim_sgpg_alloced, ioim);
                bfa_sm_set_state(ioim, bfa_ioim_sm_uninit);
        }
}

void
bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
        struct bfa_ioim_s *ioim;
        u16     iotag;
        enum bfa_ioim_event evt = BFA_IOIM_SM_COMP;

        iotag = be16_to_cpu(rsp->io_tag);

        ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
        WARN_ON(ioim->iotag != iotag);

        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_trc(ioim->bfa, rsp->io_status);
        bfa_trc(ioim->bfa, rsp->reuse_io_tag);

        if (bfa_sm_cmp_state(ioim, bfa_ioim_sm_active))
                ioim->iosp->comp_rspmsg = *m;

        switch (rsp->io_status) {
        case BFI_IOIM_STS_OK:
                bfa_stats(ioim->itnim, iocomp_ok);
                if (rsp->reuse_io_tag == 0)
                        evt = BFA_IOIM_SM_DONE;
                else
                        evt = BFA_IOIM_SM_COMP;
                break;

        case BFI_IOIM_STS_TIMEDOUT:
                bfa_stats(ioim->itnim, iocomp_timedout);
        case BFI_IOIM_STS_ABORTED:
                rsp->io_status = BFI_IOIM_STS_ABORTED;
                bfa_stats(ioim->itnim, iocomp_aborted);
                if (rsp->reuse_io_tag == 0)
                        evt = BFA_IOIM_SM_DONE;
                else
                        evt = BFA_IOIM_SM_COMP;
                break;

        case BFI_IOIM_STS_PROTO_ERR:
                bfa_stats(ioim->itnim, iocom_proto_err);
                WARN_ON(!rsp->reuse_io_tag);
                evt = BFA_IOIM_SM_COMP;
                break;

        case BFI_IOIM_STS_SQER_NEEDED:
                bfa_stats(ioim->itnim, iocom_sqer_needed);
                WARN_ON(rsp->reuse_io_tag != 0);
                evt = BFA_IOIM_SM_SQRETRY;
                break;

        case BFI_IOIM_STS_RES_FREE:
                bfa_stats(ioim->itnim, iocom_res_free);
                evt = BFA_IOIM_SM_FREE;
                break;

        case BFI_IOIM_STS_HOST_ABORTED:
                bfa_stats(ioim->itnim, iocom_hostabrts);
                if (rsp->abort_tag != ioim->abort_tag) {
                        bfa_trc(ioim->bfa, rsp->abort_tag);
                        bfa_trc(ioim->bfa, ioim->abort_tag);
                        return;
                }

                if (rsp->reuse_io_tag)
                        evt = BFA_IOIM_SM_ABORT_COMP;
                else
                        evt = BFA_IOIM_SM_ABORT_DONE;
                break;

        case BFI_IOIM_STS_UTAG:
                bfa_stats(ioim->itnim, iocom_utags);
                evt = BFA_IOIM_SM_COMP_UTAG;
                break;

        default:
                WARN_ON(1);
        }

        bfa_sm_send_event(ioim, evt);
}

void
bfa_ioim_good_comp_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct bfi_ioim_rsp_s *rsp = (struct bfi_ioim_rsp_s *) m;
        struct bfa_ioim_s *ioim;
        u16     iotag;

        iotag = be16_to_cpu(rsp->io_tag);

        ioim = BFA_IOIM_FROM_TAG(fcpim, iotag);
        WARN_ON(ioim->iotag != iotag);

        bfa_ioim_cb_profile_comp(fcpim, ioim);

        bfa_sm_send_event(ioim, BFA_IOIM_SM_COMP_GOOD);
}

/*
 * Called by itnim to clean up IO while going offline.
 */
void
bfa_ioim_cleanup(struct bfa_ioim_s *ioim)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_stats(ioim->itnim, io_cleanups);

        ioim->iosp->tskim = NULL;
        bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}

void
bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim, struct bfa_tskim_s *tskim)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_stats(ioim->itnim, io_tmaborts);

        ioim->iosp->tskim = tskim;
        bfa_sm_send_event(ioim, BFA_IOIM_SM_CLEANUP);
}

/*
 * IOC failure handling.
 */
void
bfa_ioim_iocdisable(struct bfa_ioim_s *ioim)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_stats(ioim->itnim, io_iocdowns);
        bfa_sm_send_event(ioim, BFA_IOIM_SM_HWFAIL);
}

/*
 * IO offline TOV popped. Fail the pending IO.
 */
void
bfa_ioim_tov(struct bfa_ioim_s *ioim)
{
        bfa_trc(ioim->bfa, ioim->iotag);
        bfa_sm_send_event(ioim, BFA_IOIM_SM_IOTOV);
}


/*
 * Allocate IOIM resource for initiator mode I/O request.
 */
struct bfa_ioim_s *
bfa_ioim_alloc(struct bfa_s *bfa, struct bfad_ioim_s *dio,
                struct bfa_itnim_s *itnim, u16 nsges)
{
        struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
        struct bfa_ioim_s *ioim;
        struct bfa_iotag_s *iotag = NULL;

        /*
         * alocate IOIM resource
         */
        bfa_q_deq(&fcpim->fcp->iotag_ioim_free_q, &iotag);
        if (!iotag) {
                bfa_stats(itnim, no_iotags);
                return NULL;
        }

        ioim = BFA_IOIM_FROM_TAG(fcpim, iotag->tag);

        ioim->dio = dio;
        ioim->itnim = itnim;
        ioim->nsges = nsges;
        ioim->nsgpgs = 0;

        bfa_stats(itnim, total_ios);
        fcpim->ios_active++;

        list_add_tail(&ioim->qe, &itnim->io_q);

        return ioim;
}

void
bfa_ioim_free(struct bfa_ioim_s *ioim)
{
        struct bfa_fcpim_s *fcpim = ioim->fcpim;
        struct bfa_iotag_s *iotag;

        if (ioim->nsgpgs > 0)
                bfa_sgpg_mfree(ioim->bfa, &ioim->sgpg_q, ioim->nsgpgs);

        bfa_stats(ioim->itnim, io_comps);
        fcpim->ios_active--;

        ioim->iotag &= BFA_IOIM_IOTAG_MASK;

        WARN_ON(!(ioim->iotag <
                (fcpim->fcp->num_ioim_reqs + fcpim->fcp->num_fwtio_reqs)));
        iotag = BFA_IOTAG_FROM_TAG(fcpim->fcp, ioim->iotag);

        if (ioim->iotag < fcpim->fcp->num_ioim_reqs)
                list_add_tail(&iotag->qe, &fcpim->fcp->iotag_ioim_free_q);
        else
                list_add_tail(&iotag->qe, &fcpim->fcp->iotag_tio_free_q);

        list_del(&ioim->qe);
}

void
bfa_ioim_start(struct bfa_ioim_s *ioim)