bfa_fcpim.c

Go to the documentation of this file.

/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade 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(BFA_IOIM_TAG_2_ID(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)
{
    bfa_ioim_cb_profile_start(ioim->fcpim, ioim);

    /*
     * Obtain the queue over which this request has to be issued
     */
    ioim->reqq = bfa_fcpim_ioredirect_enabled(ioim->bfa) ?
            BFA_FALSE : bfa_itnim_get_reqq(ioim);

    bfa_sm_send_event(ioim, BFA_IOIM_SM_START);
}

/*
 * Driver I/O abort request.
 */
bfa_status_t
bfa_ioim_abort(struct bfa_ioim_s *ioim)
{

    bfa_trc(ioim->bfa, ioim->iotag);

    if (!bfa_ioim_is_abortable(ioim))
        return BFA_STATUS_FAILED;

    bfa_stats(ioim->itnim, io_aborts);
    bfa_sm_send_event(ioim, BFA_IOIM_SM_ABORT);

    return BFA_STATUS_OK;
}

/*
 *  BFA TSKIM state machine functions
 */

/*
 * Task management command beginning state.
 */
static void
bfa_tskim_sm_uninit(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_START:
        bfa_sm_set_state(tskim, bfa_tskim_sm_active);
        bfa_tskim_gather_ios(tskim);

        /*
         * If device is offline, do not send TM on wire. Just cleanup
         * any pending IO requests and complete TM request.
         */
        if (!bfa_itnim_is_online(tskim->itnim)) {
            bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
            tskim->tsk_status = BFI_TSKIM_STS_OK;
            bfa_tskim_cleanup_ios(tskim);
            return;
        }

        if (!bfa_tskim_send(tskim)) {
            bfa_sm_set_state(tskim, bfa_tskim_sm_qfull);
            bfa_stats(tskim->itnim, tm_qwait);
            bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
                      &tskim->reqq_wait);
        }
        break;

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

/*
 * TM command is active, awaiting completion from firmware to
 * cleanup IO requests in TM scope.
 */
static void
bfa_tskim_sm_active(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_DONE:
        bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
        bfa_tskim_cleanup_ios(tskim);
        break;

    case BFA_TSKIM_SM_CLEANUP:
        bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
        if (!bfa_tskim_send_abort(tskim)) {
            bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup_qfull);
            bfa_stats(tskim->itnim, tm_qwait);
            bfa_reqq_wait(tskim->bfa, tskim->itnim->reqq,
                &tskim->reqq_wait);
        }
        break;

    case BFA_TSKIM_SM_HWFAIL:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_tskim_iocdisable_ios(tskim);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
        break;

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

/*
 * An active TM is being cleaned up since ITN is offline. Awaiting cleanup
 * completion event from firmware.
 */
static void
bfa_tskim_sm_cleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_DONE:
        /*
         * Ignore and wait for ABORT completion from firmware.
         */
        break;

    case BFA_TSKIM_SM_UTAG:
    case BFA_TSKIM_SM_CLEANUP_DONE:
        bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
        bfa_tskim_cleanup_ios(tskim);
        break;

    case BFA_TSKIM_SM_HWFAIL:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_tskim_iocdisable_ios(tskim);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
        break;

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

static void
bfa_tskim_sm_iocleanup(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_IOS_DONE:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_done);
        break;

    case BFA_TSKIM_SM_CLEANUP:
        /*
         * Ignore, TM command completed on wire.
         * Notify TM conmpletion on IO cleanup completion.
         */
        break;

    case BFA_TSKIM_SM_HWFAIL:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_tskim_iocdisable_ios(tskim);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
        break;

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

/*
 * Task management command is waiting for room in request CQ
 */
static void
bfa_tskim_sm_qfull(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_QRESUME:
        bfa_sm_set_state(tskim, bfa_tskim_sm_active);
        bfa_tskim_send(tskim);
        break;

    case BFA_TSKIM_SM_CLEANUP:
        /*
         * No need to send TM on wire since ITN is offline.
         */
        bfa_sm_set_state(tskim, bfa_tskim_sm_iocleanup);
        bfa_reqq_wcancel(&tskim->reqq_wait);
        bfa_tskim_cleanup_ios(tskim);
        break;

    case BFA_TSKIM_SM_HWFAIL:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_reqq_wcancel(&tskim->reqq_wait);
        bfa_tskim_iocdisable_ios(tskim);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
        break;

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

/*
 * Task management command is active, awaiting for room in request CQ
 * to send clean up request.
 */
static void
bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
        enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_DONE:
        bfa_reqq_wcancel(&tskim->reqq_wait);
        /*
         * Fall through !!!
         */
    case BFA_TSKIM_SM_QRESUME:
        bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
        bfa_tskim_send_abort(tskim);
        break;

    case BFA_TSKIM_SM_HWFAIL:
        bfa_sm_set_state(tskim, bfa_tskim_sm_hcb);
        bfa_reqq_wcancel(&tskim->reqq_wait);
        bfa_tskim_iocdisable_ios(tskim);
        bfa_tskim_qcomp(tskim, __bfa_cb_tskim_failed);
        break;

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

/*
 * BFA callback is pending
 */
static void
bfa_tskim_sm_hcb(struct bfa_tskim_s *tskim, enum bfa_tskim_event event)
{
    bfa_trc(tskim->bfa, tskim->tsk_tag << 16 | event);

    switch (event) {
    case BFA_TSKIM_SM_HCB:
        bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);
        bfa_tskim_free(tskim);
        break;

    case BFA_TSKIM_SM_CLEANUP:
        bfa_tskim_notify_comp(tskim);
        break;

    case BFA_TSKIM_SM_HWFAIL:
        break;

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

static void
__bfa_cb_tskim_done(void *cbarg, bfa_boolean_t complete)
{
    struct bfa_tskim_s *tskim = cbarg;

    if (!complete) {
        bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
        return;
    }

    bfa_stats(tskim->itnim, tm_success);
    bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk, tskim->tsk_status);
}

static void
__bfa_cb_tskim_failed(void *cbarg, bfa_boolean_t complete)
{
    struct bfa_tskim_s *tskim = cbarg;

    if (!complete) {
        bfa_sm_send_event(tskim, BFA_TSKIM_SM_HCB);
        return;
    }

    bfa_stats(tskim->itnim, tm_failures);
    bfa_cb_tskim_done(tskim->bfa->bfad, tskim->dtsk,
                BFI_TSKIM_STS_FAILED);
}

static bfa_boolean_t
bfa_tskim_match_scope(struct bfa_tskim_s *tskim, struct scsi_lun lun)
{
    switch (tskim->tm_cmnd) {
    case FCP_TM_TARGET_RESET:
        return BFA_TRUE;

    case FCP_TM_ABORT_TASK_SET:
    case FCP_TM_CLEAR_TASK_SET:
    case FCP_TM_LUN_RESET:
    case FCP_TM_CLEAR_ACA:
        return !memcmp(&tskim->lun, &lun, sizeof(lun));

    default:
        WARN_ON(1);
    }

    return BFA_FALSE;
}

/*
 * Gather affected IO requests and task management commands.
 */
static void
bfa_tskim_gather_ios(struct bfa_tskim_s *tskim)
{
    struct bfa_itnim_s *itnim = tskim->itnim;
    struct bfa_ioim_s *ioim;
    struct list_head *qe, *qen;
    struct scsi_cmnd *cmnd;
    struct scsi_lun scsilun;

    INIT_LIST_HEAD(&tskim->io_q);

    /*
     * Gather any active IO requests first.
     */
    list_for_each_safe(qe, qen, &itnim->io_q) {
        ioim = (struct bfa_ioim_s *) qe;
        cmnd = (struct scsi_cmnd *) ioim->dio;
        int_to_scsilun(cmnd->device->lun, &scsilun);
        if (bfa_tskim_match_scope(tskim, scsilun)) {
            list_del(&ioim->qe);
            list_add_tail(&ioim->qe, &tskim->io_q);
        }
    }

    /*
     * Failback any pending IO requests immediately.
     */
    list_for_each_safe(qe, qen, &itnim->pending_q) {
        ioim = (struct bfa_ioim_s *) qe;
        cmnd = (struct scsi_cmnd *) ioim->dio;
        int_to_scsilun(cmnd->device->lun, &scsilun);
        if (bfa_tskim_match_scope(tskim, scsilun)) {
            list_del(&ioim->qe);
            list_add_tail(&ioim->qe, &ioim->fcpim->ioim_comp_q);
            bfa_ioim_tov(ioim);
        }
    }
}

/*
 * IO cleanup completion
 */
static void
bfa_tskim_cleanp_comp(void *tskim_cbarg)
{
    struct bfa_tskim_s *tskim = tskim_cbarg;

    bfa_stats(tskim->itnim, tm_io_comps);
    bfa_sm_send_event(tskim, BFA_TSKIM_SM_IOS_DONE);
}

/*
 * Gather affected IO requests and task management commands.
 */
static void
bfa_tskim_cleanup_ios(struct bfa_tskim_s *tskim)
{
    struct bfa_ioim_s *ioim;
    struct list_head    *qe, *qen;

    bfa_wc_init(&tskim->wc, bfa_tskim_cleanp_comp, tskim);

    list_for_each_safe(qe, qen, &tskim->io_q) {
        ioim = (struct bfa_ioim_s *) qe;
        bfa_wc_up(&tskim->wc);
        bfa_ioim_cleanup_tm(ioim, tskim);
    }

    bfa_wc_wait(&tskim->wc);
}

/*
 * Send task management request to firmware.
 */
static bfa_boolean_t
bfa_tskim_send(struct bfa_tskim_s *tskim)
{
    struct bfa_itnim_s *itnim = tskim->itnim;
    struct bfi_tskim_req_s *m;

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

    /*
     * build i/o request message next
     */
    bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_TM_REQ,
            bfa_fn_lpu(tskim->bfa));

    m->tsk_tag = cpu_to_be16(tskim->tsk_tag);
    m->itn_fhdl = tskim->itnim->rport->fw_handle;
    m->t_secs = tskim->tsecs;
    m->lun = tskim->lun;
    m->tm_flags = tskim->tm_cmnd;

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

/*
 * Send abort request to cleanup an active TM to firmware.
 */
static bfa_boolean_t
bfa_tskim_send_abort(struct bfa_tskim_s *tskim)
{
    struct bfa_itnim_s  *itnim = tskim->itnim;
    struct bfi_tskim_abortreq_s *m;

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

    /*
     * build i/o request message next
     */
    bfi_h2i_set(m->mh, BFI_MC_TSKIM, BFI_TSKIM_H2I_ABORT_REQ,
            bfa_fn_lpu(tskim->bfa));

    m->tsk_tag  = cpu_to_be16(tskim->tsk_tag);

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

/*
 * Call to resume task management cmnd waiting for room in request queue.
 */
static void
bfa_tskim_qresume(void *cbarg)
{
    struct bfa_tskim_s *tskim = cbarg;

    bfa_stats(tskim->itnim, tm_qresumes);
    bfa_sm_send_event(tskim, BFA_TSKIM_SM_QRESUME);
}

/*
 * Cleanup IOs associated with a task mangement command on IOC failures.
 */
static void
bfa_tskim_iocdisable_ios(struct bfa_tskim_s *tskim)
{
    struct bfa_ioim_s *ioim;
    struct list_head    *qe, *qen;

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

/*
 * Notification on completions from related ioim.
 */
void
bfa_tskim_iodone(struct bfa_tskim_s *tskim)
{
    bfa_wc_down(&tskim->wc);
}

/*
 * Handle IOC h/w failure notification from itnim.
 */
void
bfa_tskim_iocdisable(struct bfa_tskim_s *tskim)
{
    tskim->notify = BFA_FALSE;
    bfa_stats(tskim->itnim, tm_iocdowns);
    bfa_sm_send_event(tskim, BFA_TSKIM_SM_HWFAIL);
}

/*
 * Cleanup TM command and associated IOs as part of ITNIM offline.
 */
void
bfa_tskim_cleanup(struct bfa_tskim_s *tskim)
{
    tskim->notify = BFA_TRUE;
    bfa_stats(tskim->itnim, tm_cleanups);
    bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP);
}

/*
 * Memory allocation and initialization.
 */
void
bfa_tskim_attach(struct bfa_fcpim_s *fcpim)
{
    struct bfa_tskim_s *tskim;
    struct bfa_fcp_mod_s    *fcp = fcpim->fcp;
    u16 i;

    INIT_LIST_HEAD(&fcpim->tskim_free_q);
    INIT_LIST_HEAD(&fcpim->tskim_unused_q);

    tskim = (struct bfa_tskim_s *) bfa_mem_kva_curp(fcp);
    fcpim->tskim_arr = tskim;

    for (i = 0; i < fcpim->num_tskim_reqs; i++, tskim++) {
        /*
         * initialize TSKIM
         */
        memset(tskim, 0, sizeof(struct bfa_tskim_s));
        tskim->tsk_tag = i;
        tskim->bfa  = fcpim->bfa;
        tskim->fcpim    = fcpim;
        tskim->notify  = BFA_FALSE;
        bfa_reqq_winit(&tskim->reqq_wait, bfa_tskim_qresume,
                    tskim);
        bfa_sm_set_state(tskim, bfa_tskim_sm_uninit);

        list_add_tail(&tskim->qe, &fcpim->tskim_free_q);
    }

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

void
bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
    struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
    struct bfi_tskim_rsp_s *rsp = (struct bfi_tskim_rsp_s *) m;
    struct bfa_tskim_s *tskim;
    u16 tsk_tag = be16_to_cpu(rsp->tsk_tag);

    tskim = BFA_TSKIM_FROM_TAG(fcpim, tsk_tag);
    WARN_ON(tskim->tsk_tag != tsk_tag);

    tskim->tsk_status = rsp->tsk_status;

    /*
     * Firmware sends BFI_TSKIM_STS_ABORTED status for abort
     * requests. All other statuses are for normal completions.
     */
    if (rsp->tsk_status == BFI_TSKIM_STS_ABORTED) {
        bfa_stats(tskim->itnim, tm_cleanup_comps);
        bfa_sm_send_event(tskim, BFA_TSKIM_SM_CLEANUP_DONE);
    } else if (rsp->tsk_status == BFI_TSKIM_STS_UTAG) {
        bfa_sm_send_event(tskim, BFA_TSKIM_SM_UTAG);
    } else {
        bfa_stats(tskim->itnim, tm_fw_rsps);
        bfa_sm_send_event(tskim, BFA_TSKIM_SM_DONE);
    }
}


struct bfa_tskim_s *
bfa_tskim_alloc(struct bfa_s *bfa, struct bfad_tskim_s *dtsk)
{
    struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
    struct bfa_tskim_s *tskim;

    bfa_q_deq(&fcpim->tskim_free_q, &tskim);

    if (tskim)
        tskim->dtsk = dtsk;

    return tskim;
}

void
bfa_tskim_free(struct bfa_tskim_s *tskim)
{
    WARN_ON(!bfa_q_is_on_q_func(&tskim->itnim->tsk_q, &tskim->qe));
    list_del(&tskim->qe);
    list_add_tail(&tskim->qe, &tskim->fcpim->tskim_free_q);
}

/*
 * Start a task management command.
 *
 * @param[in]   tskim   BFA task management command instance
 * @param[in]   itnim   i-t nexus for the task management command
 * @param[in]   lun lun, if applicable
 * @param[in]   tm_cmnd Task management command code.
 * @param[in]   t_secs  Timeout in seconds
 *
 * @return None.
 */
void
bfa_tskim_start(struct bfa_tskim_s *tskim, struct bfa_itnim_s *itnim,
            struct scsi_lun lun,
            enum fcp_tm_cmnd tm_cmnd, u8 tsecs)
{
    tskim->itnim    = itnim;
    tskim->lun  = lun;
    tskim->tm_cmnd = tm_cmnd;
    tskim->tsecs    = tsecs;
    tskim->notify  = BFA_FALSE;
    bfa_stats(itnim, tm_cmnds);

    list_add_tail(&tskim->qe, &itnim->tsk_q);
    bfa_sm_send_event(tskim, BFA_TSKIM_SM_START);
}

void
bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw)
{
    struct bfa_fcpim_s  *fcpim = BFA_FCPIM(bfa);
    struct list_head    *qe;
    int i;

    for (i = 0; i < (fcpim->num_tskim_reqs - num_tskim_fw); i++) {
        bfa_q_deq_tail(&fcpim->tskim_free_q, &qe);
        list_add_tail(qe, &fcpim->tskim_unused_q);
    }
}

/* BFA FCP module - parent module for fcpim */

BFA_MODULE(fcp);

static void
bfa_fcp_meminfo(struct bfa_iocfc_cfg_s *cfg, struct bfa_meminfo_s *minfo,
        struct bfa_s *bfa)
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
    struct bfa_mem_kva_s *fcp_kva = BFA_MEM_FCP_KVA(bfa);
    struct bfa_mem_dma_s *seg_ptr;
    u16 nsegs, idx, per_seg_ios, num_io_req;
    u32 km_len = 0;

    /*
     * ZERO for num_ioim_reqs and num_fwtio_reqs is allowed config value.
     * So if the values are non zero, adjust them appropriately.
     */
    if (cfg->fwcfg.num_ioim_reqs &&
        cfg->fwcfg.num_ioim_reqs < BFA_IOIM_MIN)
        cfg->fwcfg.num_ioim_reqs = BFA_IOIM_MIN;
    else if (cfg->fwcfg.num_ioim_reqs > BFA_IOIM_MAX)
        cfg->fwcfg.num_ioim_reqs = BFA_IOIM_MAX;

    if (cfg->fwcfg.num_fwtio_reqs > BFA_FWTIO_MAX)
        cfg->fwcfg.num_fwtio_reqs = BFA_FWTIO_MAX;

    num_io_req = (cfg->fwcfg.num_ioim_reqs + cfg->fwcfg.num_fwtio_reqs);
    if (num_io_req > BFA_IO_MAX) {
        if (cfg->fwcfg.num_ioim_reqs && cfg->fwcfg.num_fwtio_reqs) {
            cfg->fwcfg.num_ioim_reqs = BFA_IO_MAX/2;
            cfg->fwcfg.num_fwtio_reqs = BFA_IO_MAX/2;
        } else if (cfg->fwcfg.num_fwtio_reqs)
            cfg->fwcfg.num_fwtio_reqs = BFA_FWTIO_MAX;
        else
            cfg->fwcfg.num_ioim_reqs = BFA_IOIM_MAX;
    }

    bfa_fcpim_meminfo(cfg, &km_len);

    num_io_req = (cfg->fwcfg.num_ioim_reqs + cfg->fwcfg.num_fwtio_reqs);
    km_len += num_io_req * sizeof(struct bfa_iotag_s);
    km_len += cfg->fwcfg.num_rports * sizeof(struct bfa_itn_s);

    /* dma memory */
    nsegs = BFI_MEM_DMA_NSEGS(num_io_req, BFI_IOIM_SNSLEN);
    per_seg_ios = BFI_MEM_NREQS_SEG(BFI_IOIM_SNSLEN);

    bfa_mem_dma_seg_iter(fcp, seg_ptr, nsegs, idx) {
        if (num_io_req >= per_seg_ios) {
            num_io_req -= per_seg_ios;
            bfa_mem_dma_setup(minfo, seg_ptr,
                per_seg_ios * BFI_IOIM_SNSLEN);
        } else
            bfa_mem_dma_setup(minfo, seg_ptr,
                num_io_req * BFI_IOIM_SNSLEN);
    }

    /* kva memory */
    bfa_mem_kva_setup(minfo, fcp_kva, km_len);
}

static void
bfa_fcp_attach(struct bfa_s *bfa, void *bfad, struct bfa_iocfc_cfg_s *cfg,
        struct bfa_pcidev_s *pcidev)
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
    struct bfa_mem_dma_s *seg_ptr;
    u16 idx, nsegs, num_io_req;

    fcp->max_ioim_reqs = cfg->fwcfg.num_ioim_reqs;
    fcp->num_ioim_reqs = cfg->fwcfg.num_ioim_reqs;
    fcp->num_fwtio_reqs  = cfg->fwcfg.num_fwtio_reqs;
    fcp->num_itns   = cfg->fwcfg.num_rports;
    fcp->bfa = bfa;

    /*
     * Setup the pool of snsbase addr's, that is passed to fw as
     * part of bfi_iocfc_cfg_s.
     */
    num_io_req = (cfg->fwcfg.num_ioim_reqs + cfg->fwcfg.num_fwtio_reqs);
    nsegs = BFI_MEM_DMA_NSEGS(num_io_req, BFI_IOIM_SNSLEN);

    bfa_mem_dma_seg_iter(fcp, seg_ptr, nsegs, idx) {

        if (!bfa_mem_dma_virt(seg_ptr))
            break;

        fcp->snsbase[idx].pa = bfa_mem_dma_phys(seg_ptr);
        fcp->snsbase[idx].kva = bfa_mem_dma_virt(seg_ptr);
        bfa_iocfc_set_snsbase(bfa, idx, fcp->snsbase[idx].pa);
    }

    fcp->throttle_update_required = 1;
    bfa_fcpim_attach(fcp, bfad, cfg, pcidev);

    bfa_iotag_attach(fcp);

    fcp->itn_arr = (struct bfa_itn_s *) bfa_mem_kva_curp(fcp);
    bfa_mem_kva_curp(fcp) = (u8 *)fcp->itn_arr +
            (fcp->num_itns * sizeof(struct bfa_itn_s));
    memset(fcp->itn_arr, 0,
            (fcp->num_itns * sizeof(struct bfa_itn_s)));
}

static void
bfa_fcp_detach(struct bfa_s *bfa)
{
}

static void
bfa_fcp_start(struct bfa_s *bfa)
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);

    /*
     * bfa_init() with flash read is complete. now invalidate the stale
     * content of lun mask like unit attention, rp tag and lp tag.
     */
    bfa_ioim_lm_init(fcp->bfa);
}

static void
bfa_fcp_stop(struct bfa_s *bfa)
{
}

static void
bfa_fcp_iocdisable(struct bfa_s *bfa)
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);

    bfa_fcpim_iocdisable(fcp);
}

void
bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw, u16 max_ioim_fw)
{
    struct bfa_fcp_mod_s    *mod = BFA_FCP_MOD(bfa);
    struct list_head    *qe;
    int i;

    /* Update io throttle value only once during driver load time */
    if (!mod->throttle_update_required)
        return;

    for (i = 0; i < (mod->num_ioim_reqs - num_ioim_fw); i++) {
        bfa_q_deq_tail(&mod->iotag_ioim_free_q, &qe);
        list_add_tail(qe, &mod->iotag_unused_q);
    }

    if (mod->num_ioim_reqs != num_ioim_fw) {
        bfa_trc(bfa, mod->num_ioim_reqs);
        bfa_trc(bfa, num_ioim_fw);
    }

    mod->max_ioim_reqs = max_ioim_fw;
    mod->num_ioim_reqs = num_ioim_fw;
    mod->throttle_update_required = 0;
}

void
bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport,
        void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m))
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
    struct bfa_itn_s *itn;

    itn =  BFA_ITN_FROM_TAG(fcp, rport->rport_tag);
    itn->isr = isr;
}

/*
 * Itn interrupt processing.
 */
void
bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
{
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);
    union bfi_itn_i2h_msg_u msg;
    struct bfa_itn_s *itn;

    msg.msg = m;
    itn =  BFA_ITN_FROM_TAG(fcp, msg.create_rsp->bfa_handle);

    if (itn->isr)
        itn->isr(bfa, m);
    else
        WARN_ON(1);
}

void
bfa_iotag_attach(struct bfa_fcp_mod_s *fcp)
{
    struct bfa_iotag_s *iotag;
    u16 num_io_req, i;

    iotag = (struct bfa_iotag_s *) bfa_mem_kva_curp(fcp);
    fcp->iotag_arr = iotag;

    INIT_LIST_HEAD(&fcp->iotag_ioim_free_q);
    INIT_LIST_HEAD(&fcp->iotag_tio_free_q);
    INIT_LIST_HEAD(&fcp->iotag_unused_q);

    num_io_req = fcp->num_ioim_reqs + fcp->num_fwtio_reqs;
    for (i = 0; i < num_io_req; i++, iotag++) {
        memset(iotag, 0, sizeof(struct bfa_iotag_s));
        iotag->tag = i;
        if (i < fcp->num_ioim_reqs)
            list_add_tail(&iotag->qe, &fcp->iotag_ioim_free_q);
        else
            list_add_tail(&iotag->qe, &fcp->iotag_tio_free_q);
    }

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


u16
bfa_fcpim_get_throttle_cfg(struct bfa_s *bfa, u16 drv_cfg_param)
{
    u16 tmp;
    struct bfa_fcp_mod_s *fcp = BFA_FCP_MOD(bfa);

    /*
     * If throttle value from flash is already in effect after driver is
     * loaded then until next load, always return current value instead
     * of actual flash value
     */
    if (!fcp->throttle_update_required)
        return (u16)fcp->num_ioim_reqs;

    tmp = bfa_dconf_read_data_valid(bfa) ? bfa_fcpim_read_throttle(bfa) : 0;
    if (!tmp || (tmp > drv_cfg_param))
        tmp = drv_cfg_param;

    return tmp;
}

bfa_status_t
bfa_fcpim_write_throttle(struct bfa_s *bfa, u16 value)
{
    if (!bfa_dconf_get_min_cfg(bfa)) {
        BFA_DCONF_MOD(bfa)->dconf->throttle_cfg.value = value;
        BFA_DCONF_MOD(bfa)->dconf->throttle_cfg.is_valid = 1;
        return BFA_STATUS_OK;
    }

    return BFA_STATUS_FAILED;
}

u16
bfa_fcpim_read_throttle(struct bfa_s *bfa)
{
    struct bfa_throttle_cfg_s *throttle_cfg =
            &(BFA_DCONF_MOD(bfa)->dconf->throttle_cfg);

    return ((!bfa_dconf_get_min_cfg(bfa)) ?
           ((throttle_cfg->is_valid == 1) ? (throttle_cfg->value) : 0) : 0);
}

bfa_status_t
bfa_fcpim_throttle_set(struct bfa_s *bfa, u16 value)
{
    /* in min cfg no commands should run. */
    if ((bfa_dconf_get_min_cfg(bfa) == BFA_TRUE) ||
        (!bfa_dconf_read_data_valid(bfa)))
        return BFA_STATUS_FAILED;

    bfa_fcpim_write_throttle(bfa, value);

    return bfa_dconf_update(bfa);
}

bfa_status_t
bfa_fcpim_throttle_get(struct bfa_s *bfa, void *buf)
{
    struct bfa_fcpim_s *fcpim = BFA_FCPIM(bfa);
    struct bfa_defs_fcpim_throttle_s throttle;

    if ((bfa_dconf_get_min_cfg(bfa) == BFA_TRUE) ||
        (!bfa_dconf_read_data_valid(bfa)))
        return BFA_STATUS_FAILED;

    memset(&throttle, 0, sizeof(struct bfa_defs_fcpim_throttle_s));

    throttle.cur_value = (u16)(fcpim->fcp->num_ioim_reqs);
    throttle.cfg_value = bfa_fcpim_read_throttle(bfa);
    if (!throttle.cfg_value)
        throttle.cfg_value = throttle.cur_value;
    throttle.max_value = (u16)(fcpim->fcp->max_ioim_reqs);
    memcpy(buf, &throttle, sizeof(struct bfa_defs_fcpim_throttle_s));

    return BFA_STATUS_OK;
}