// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
 * Copyright (c) 2014- QLogic Corporation.
 * All rights reserved
 * www.qlogic.com
 *
 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
 */

/*
 *  fcpim.c - FCP initiator mode i-t nexus state machine
 */

#include "bfad_drv.h"
#include "bfa_fcs.h"
#include "bfa_fcbuild.h"
#include "bfad_im.h"
#include "bfa_fcpim.h"

BFA_TRC_FILE(FCS, FCPIM);

/*
 * forward declarations
 */
static void     bfa_fcs_itnim_timeout(void *arg);
static void     bfa_fcs_itnim_free(struct bfa_fcs_itnim_s *itnim);
static void     bfa_fcs_itnim_send_prli(void *itnim_cbarg,
                                        struct bfa_fcxp_s *fcxp_alloced);
static void     bfa_fcs_itnim_prli_response(void *fcsarg,
                         struct bfa_fcxp_s *fcxp, void *cbarg,
                            bfa_status_t req_status, u32 rsp_len,
                            u32 resid_len, struct fchs_s *rsp_fchs);
static void     bfa_fcs_itnim_aen_post(struct bfa_fcs_itnim_s *itnim,
                        enum bfa_itnim_aen_event event);

static void     bfa_fcs_itnim_sm_offline(struct bfa_fcs_itnim_s *itnim,
                                         enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_prli_send(struct bfa_fcs_itnim_s *itnim,
                                           enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_prli(struct bfa_fcs_itnim_s *itnim,
                                      enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_prli_retry(struct bfa_fcs_itnim_s *itnim,
                                            enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_hcb_online(struct bfa_fcs_itnim_s *itnim,
                                            enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_hal_rport_online(struct bfa_fcs_itnim_s *itnim,
                                        enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_online(struct bfa_fcs_itnim_s *itnim,
                                        enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_hcb_offline(struct bfa_fcs_itnim_s *itnim,
                                             enum bfa_fcs_itnim_event event);
static void     bfa_fcs_itnim_sm_initiator(struct bfa_fcs_itnim_s *itnim,
                                           enum bfa_fcs_itnim_event event);

struct bfa_fcs_itnim_sm_table_s {
        bfa_fcs_itnim_sm_t sm;          /*  state machine function      */
        enum bfa_itnim_state state;     /*  state machine encoding      */
        char            *name;          /*  state name for display      */
};

static inline enum bfa_itnim_state
bfa_fcs_itnim_sm_to_state(struct bfa_fcs_itnim_sm_table_s *smt, bfa_fcs_itnim_sm_t sm)
{
        int i = 0;

        while (smt[i].sm && smt[i].sm != sm)
                i++;
        return smt[i].state;
}

static struct bfa_fcs_itnim_sm_table_s itnim_sm_table[] = {
        {BFA_SM(bfa_fcs_itnim_sm_offline), BFA_ITNIM_OFFLINE},
        {BFA_SM(bfa_fcs_itnim_sm_prli_send), BFA_ITNIM_PRLI_SEND},
        {BFA_SM(bfa_fcs_itnim_sm_prli), BFA_ITNIM_PRLI_SENT},
        {BFA_SM(bfa_fcs_itnim_sm_prli_retry), BFA_ITNIM_PRLI_RETRY},
        {BFA_SM(bfa_fcs_itnim_sm_hcb_online), BFA_ITNIM_HCB_ONLINE},
        {BFA_SM(bfa_fcs_itnim_sm_online), BFA_ITNIM_ONLINE},
        {BFA_SM(bfa_fcs_itnim_sm_hcb_offline), BFA_ITNIM_HCB_OFFLINE},
        {BFA_SM(bfa_fcs_itnim_sm_initiator), BFA_ITNIM_INITIATIOR},
};

/*
 *  fcs_itnim_sm FCS itnim state machine
 */

static void
bfa_fcs_itnim_sm_offline(struct bfa_fcs_itnim_s *itnim,
                 enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_FCS_ONLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_send);
                itnim->prli_retries = 0;
                bfa_fcs_itnim_send_prli(itnim, NULL);
                break;

        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_INITIATOR:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_fcs_itnim_free(itnim);
                break;

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

}

static void
bfa_fcs_itnim_sm_prli_send(struct bfa_fcs_itnim_s *itnim,
                 enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_FRMSENT:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli);
                break;

        case BFA_FCS_ITNIM_SM_INITIATOR:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
                bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_FCS_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcxp_walloc_cancel(itnim->fcs->bfa, &itnim->fcxp_wqe);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_prli(struct bfa_fcs_itnim_s *itnim,
                 enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_RSP_OK:
                if (itnim->rport->scsi_function == BFA_RPORT_INITIATOR)
                        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
                else
                        bfa_sm_set_state(itnim,
                                bfa_fcs_itnim_sm_hal_rport_online);

                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_FCS_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_RSP_ERROR:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_retry);
                bfa_timer_start(itnim->fcs->bfa, &itnim->timer,
                                bfa_fcs_itnim_timeout, itnim,
                                BFA_FCS_RETRY_TIMEOUT);
                break;

        case BFA_FCS_ITNIM_SM_RSP_NOT_SUPP:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                break;

        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcxp_discard(itnim->fcxp);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_INITIATOR:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
                bfa_fcxp_discard(itnim->fcxp);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_FCS_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcxp_discard(itnim->fcxp);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_hal_rport_online(struct bfa_fcs_itnim_s *itnim,
                                enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_HAL_ONLINE:
                if (!itnim->bfa_itnim)
                        itnim->bfa_itnim = bfa_itnim_create(itnim->fcs->bfa,
                                        itnim->rport->bfa_rport, itnim);

                if (itnim->bfa_itnim) {
                        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_hcb_online);
                        bfa_itnim_online(itnim->bfa_itnim, itnim->seq_rec);
                } else {
                        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                        bfa_sm_send_event(itnim->rport, RPSM_EVENT_DELETE);
                }

                break;

        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_prli_retry(struct bfa_fcs_itnim_s *itnim,
                            enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_TIMEOUT:
                if (itnim->prli_retries < BFA_FCS_RPORT_MAX_RETRIES) {
                        itnim->prli_retries++;
                        bfa_trc(itnim->fcs, itnim->prli_retries);
                        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_prli_send);
                        bfa_fcs_itnim_send_prli(itnim, NULL);
                } else {
                        /* invoke target offline */
                        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                        bfa_sm_send_event(itnim->rport, RPSM_EVENT_LOGO_IMP);
                }
                break;


        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_timer_stop(&itnim->timer);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_INITIATOR:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_initiator);
                bfa_timer_stop(&itnim->timer);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_FCS_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_timer_stop(&itnim->timer);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_hcb_online(struct bfa_fcs_itnim_s *itnim,
                            enum bfa_fcs_itnim_event event)
{
        struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
        char    lpwwn_buf[BFA_STRING_32];
        char    rpwwn_buf[BFA_STRING_32];

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_HCB_ONLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_online);
                bfa_fcb_itnim_online(itnim->itnim_drv);
                wwn2str(lpwwn_buf, bfa_fcs_lport_get_pwwn(itnim->rport->port));
                wwn2str(rpwwn_buf, itnim->rport->pwwn);
                BFA_LOG(KERN_INFO, bfad, bfa_log_level,
                "Target (WWN = %s) is online for initiator (WWN = %s)\n",
                rpwwn_buf, lpwwn_buf);
                bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_hcb_offline);
                bfa_itnim_offline(itnim->bfa_itnim);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_online(struct bfa_fcs_itnim_s *itnim,
                 enum bfa_fcs_itnim_event event)
{
        struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
        char    lpwwn_buf[BFA_STRING_32];
        char    rpwwn_buf[BFA_STRING_32];

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_hcb_offline);
                bfa_fcb_itnim_offline(itnim->itnim_drv);
                bfa_itnim_offline(itnim->bfa_itnim);
                wwn2str(lpwwn_buf, bfa_fcs_lport_get_pwwn(itnim->rport->port));
                wwn2str(rpwwn_buf, itnim->rport->pwwn);
                if (bfa_fcs_lport_is_online(itnim->rport->port) == BFA_TRUE) {
                        BFA_LOG(KERN_ERR, bfad, bfa_log_level,
                        "Target (WWN = %s) connectivity lost for "
                        "initiator (WWN = %s)\n", rpwwn_buf, lpwwn_buf);
                        bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_DISCONNECT);
                } else {
                        BFA_LOG(KERN_INFO, bfad, bfa_log_level,
                        "Target (WWN = %s) offlined by initiator (WWN = %s)\n",
                        rpwwn_buf, lpwwn_buf);
                        bfa_fcs_itnim_aen_post(itnim, BFA_ITNIM_AEN_OFFLINE);
                }
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_sm_hcb_offline(struct bfa_fcs_itnim_s *itnim,
                             enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_HCB_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcs_itnim_free(itnim);
                break;

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

/*
 * This state is set when a discovered rport is also in intiator mode.
 * This ITN is marked as no_op and is not active and will not be truned into
 * online state.
 */
static void
bfa_fcs_itnim_sm_initiator(struct bfa_fcs_itnim_s *itnim,
                 enum bfa_fcs_itnim_event event)
{
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_trc(itnim->fcs, event);

        switch (event) {
        case BFA_FCS_ITNIM_SM_OFFLINE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_OFFLINE);
                break;

        /*
         * fcs_online is expected here for well known initiator ports
         */
        case BFA_FCS_ITNIM_SM_FCS_ONLINE:
                bfa_sm_send_event(itnim->rport, RPSM_EVENT_FC4_FCS_ONLINE);
                break;

        case BFA_FCS_ITNIM_SM_RSP_ERROR:
        case BFA_FCS_ITNIM_SM_INITIATOR:
                break;

        case BFA_FCS_ITNIM_SM_DELETE:
                bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);
                bfa_fcs_itnim_free(itnim);
                break;

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

static void
bfa_fcs_itnim_aen_post(struct bfa_fcs_itnim_s *itnim,
                        enum bfa_itnim_aen_event event)
{
        struct bfa_fcs_rport_s *rport = itnim->rport;
        struct bfad_s *bfad = (struct bfad_s *)itnim->fcs->bfad;
        struct bfa_aen_entry_s  *aen_entry;

        /* Don't post events for well known addresses */
        if (BFA_FCS_PID_IS_WKA(rport->pid))
                return;

        bfad_get_aen_entry(bfad, aen_entry);
        if (!aen_entry)
                return;

        aen_entry->aen_data.itnim.vf_id = rport->port->fabric->vf_id;
        aen_entry->aen_data.itnim.ppwwn = bfa_fcs_lport_get_pwwn(
                                        bfa_fcs_get_base_port(itnim->fcs));
        aen_entry->aen_data.itnim.lpwwn = bfa_fcs_lport_get_pwwn(rport->port);
        aen_entry->aen_data.itnim.rpwwn = rport->pwwn;

        /* Send the AEN notification */
        bfad_im_post_vendor_event(aen_entry, bfad, ++rport->fcs->fcs_aen_seq,
                                  BFA_AEN_CAT_ITNIM, event);
}

static void
bfa_fcs_itnim_send_prli(void *itnim_cbarg, struct bfa_fcxp_s *fcxp_alloced)
{
        struct bfa_fcs_itnim_s *itnim = itnim_cbarg;
        struct bfa_fcs_rport_s *rport = itnim->rport;
        struct bfa_fcs_lport_s *port = rport->port;
        struct fchs_s   fchs;
        struct bfa_fcxp_s *fcxp;
        int             len;

        bfa_trc(itnim->fcs, itnim->rport->pwwn);

        fcxp = fcxp_alloced ? fcxp_alloced :
               bfa_fcs_fcxp_alloc(port->fcs, BFA_TRUE);
        if (!fcxp) {
                itnim->stats.fcxp_alloc_wait++;
                bfa_fcs_fcxp_alloc_wait(port->fcs->bfa, &itnim->fcxp_wqe,
                                bfa_fcs_itnim_send_prli, itnim, BFA_TRUE);
                return;
        }
        itnim->fcxp = fcxp;

        len = fc_prli_build(&fchs, bfa_fcxp_get_reqbuf(fcxp),
                            itnim->rport->pid, bfa_fcs_lport_get_fcid(port), 0);

        bfa_fcxp_send(fcxp, rport->bfa_rport, port->fabric->vf_id, port->lp_tag,
                      BFA_FALSE, FC_CLASS_3, len, &fchs,
                      bfa_fcs_itnim_prli_response, (void *)itnim,
                      FC_MAX_PDUSZ, FC_ELS_TOV);

        itnim->stats.prli_sent++;
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_FRMSENT);
}

static void
bfa_fcs_itnim_prli_response(void *fcsarg, struct bfa_fcxp_s *fcxp, void *cbarg,
                            bfa_status_t req_status, u32 rsp_len,
                            u32 resid_len, struct fchs_s *rsp_fchs)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cbarg;
        struct fc_els_cmd_s *els_cmd;
        struct fc_prli_s *prli_resp;
        struct fc_ls_rjt_s *ls_rjt;
        struct fc_prli_params_s *sparams;

        bfa_trc(itnim->fcs, req_status);

        /*
         * Sanity Checks
         */
        if (req_status != BFA_STATUS_OK) {
                itnim->stats.prli_rsp_err++;
                bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_ERROR);
                return;
        }

        els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);

        if (els_cmd->els_code == FC_ELS_ACC) {
                prli_resp = (struct fc_prli_s *) els_cmd;

                if (fc_prli_rsp_parse(prli_resp, rsp_len) != FC_PARSE_OK) {
                        bfa_trc(itnim->fcs, rsp_len);
                        /*
                         * Check if this  r-port is also in Initiator mode.
                         * If so, we need to set this ITN as a no-op.
                         */
                        if (prli_resp->parampage.servparams.initiator) {
                                bfa_trc(itnim->fcs, prli_resp->parampage.type);
                                itnim->rport->scsi_function =
                                                BFA_RPORT_INITIATOR;
                                itnim->stats.prli_rsp_acc++;
                                itnim->stats.initiator++;
                                bfa_sm_send_event(itnim,
                                                  BFA_FCS_ITNIM_SM_RSP_OK);
                                return;
                        }

                        itnim->stats.prli_rsp_parse_err++;
                        return;
                }
                itnim->rport->scsi_function = BFA_RPORT_TARGET;

                sparams = &prli_resp->parampage.servparams;
                itnim->seq_rec       = sparams->retry;
                itnim->rec_support   = sparams->rec_support;
                itnim->task_retry_id = sparams->task_retry_id;
                itnim->conf_comp     = sparams->confirm;

                itnim->stats.prli_rsp_acc++;
                bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_OK);
        } else {
                ls_rjt = (struct fc_ls_rjt_s *) BFA_FCXP_RSP_PLD(fcxp);

                bfa_trc(itnim->fcs, ls_rjt->reason_code);
                bfa_trc(itnim->fcs, ls_rjt->reason_code_expl);

                itnim->stats.prli_rsp_rjt++;
                if (ls_rjt->reason_code == FC_LS_RJT_RSN_CMD_NOT_SUPP) {
                        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_NOT_SUPP);
                        return;
                }
                bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_RSP_ERROR);
        }
}

static void
bfa_fcs_itnim_timeout(void *arg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) arg;

        itnim->stats.timeout++;
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_TIMEOUT);
}

static void
bfa_fcs_itnim_free(struct bfa_fcs_itnim_s *itnim)
{
        if (itnim->bfa_itnim) {
                bfa_itnim_delete(itnim->bfa_itnim);
                itnim->bfa_itnim = NULL;
        }

        bfa_fcb_itnim_free(itnim->fcs->bfad, itnim->itnim_drv);
}



/*
 *  itnim_public FCS ITNIM public interfaces
 */

/*
 *      Called by rport when a new rport is created.
 *
 * @param[in] rport     -  remote port.
 */
struct bfa_fcs_itnim_s *
bfa_fcs_itnim_create(struct bfa_fcs_rport_s *rport)
{
        struct bfa_fcs_lport_s *port = rport->port;
        struct bfa_fcs_itnim_s *itnim;
        struct bfad_itnim_s   *itnim_drv;
        int ret;

        /*
         * call bfad to allocate the itnim
         */
        ret = bfa_fcb_itnim_alloc(port->fcs->bfad, &itnim, &itnim_drv);
        if (ret) {
                bfa_trc(port->fcs, rport->pwwn);
                return NULL;
        }

        /*
         * Initialize itnim
         */
        itnim->rport = rport;
        itnim->fcs = rport->fcs;
        itnim->itnim_drv = itnim_drv;

        itnim->bfa_itnim     = NULL;
        itnim->seq_rec       = BFA_FALSE;
        itnim->rec_support   = BFA_FALSE;
        itnim->conf_comp     = BFA_FALSE;
        itnim->task_retry_id = BFA_FALSE;

        /*
         * Set State machine
         */
        bfa_sm_set_state(itnim, bfa_fcs_itnim_sm_offline);

        return itnim;
}

/*
 *      Called by rport to delete  the instance of FCPIM.
 *
 * @param[in] rport     -  remote port.
 */
void
bfa_fcs_itnim_delete(struct bfa_fcs_itnim_s *itnim)
{
        bfa_trc(itnim->fcs, itnim->rport->pid);
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_DELETE);
}

/*
 * Notification from rport that PLOGI is complete to initiate FC-4 session.
 */
void
bfa_fcs_itnim_brp_online(struct bfa_fcs_itnim_s *itnim)
{
        itnim->stats.onlines++;

        if (!BFA_FCS_PID_IS_WKA(itnim->rport->pid))
                bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_HAL_ONLINE);
}

/*
 * Called by rport to handle a remote device offline.
 */
void
bfa_fcs_itnim_rport_offline(struct bfa_fcs_itnim_s *itnim)
{
        itnim->stats.offlines++;
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_OFFLINE);
}

/*
 * Called by rport when remote port is known to be an initiator from
 * PRLI received.
 */
void
bfa_fcs_itnim_is_initiator(struct bfa_fcs_itnim_s *itnim)
{
        bfa_trc(itnim->fcs, itnim->rport->pid);
        itnim->stats.initiator++;
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_INITIATOR);
}

/*
 * Called by rport to check if the itnim is online.
 */
bfa_status_t
bfa_fcs_itnim_get_online_state(struct bfa_fcs_itnim_s *itnim)
{
        bfa_trc(itnim->fcs, itnim->rport->pid);
        switch (bfa_fcs_itnim_sm_to_state(itnim_sm_table, itnim->sm)) {
        case BFA_ITNIM_ONLINE:
        case BFA_ITNIM_INITIATIOR:
                return BFA_STATUS_OK;

        default:
                return BFA_STATUS_NO_FCPIM_NEXUS;
        }
}

/*
 * BFA completion callback for bfa_itnim_online().
 */
void
bfa_cb_itnim_online(void *cbarg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cbarg;

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_HCB_ONLINE);
}

/*
 * BFA completion callback for bfa_itnim_offline().
 */
void
bfa_cb_itnim_offline(void *cb_arg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_sm_send_event(itnim, BFA_FCS_ITNIM_SM_HCB_OFFLINE);
}

/*
 * Mark the beginning of PATH TOV handling. IO completion callbacks
 * are still pending.
 */
void
bfa_cb_itnim_tov_begin(void *cb_arg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
}

/*
 * Mark the end of PATH TOV handling. All pending IOs are already cleaned up.
 */
void
bfa_cb_itnim_tov(void *cb_arg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;
        struct bfad_itnim_s *itnim_drv = itnim->itnim_drv;

        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        itnim_drv->state = ITNIM_STATE_TIMEOUT;
}

/*
 *              BFA notification to FCS/driver for second level error recovery.
 *
 * Atleast one I/O request has timedout and target is unresponsive to
 * repeated abort requests. Second level error recovery should be initiated
 * by starting implicit logout and recovery procedures.
 */
void
bfa_cb_itnim_sler(void *cb_arg)
{
        struct bfa_fcs_itnim_s *itnim = (struct bfa_fcs_itnim_s *) cb_arg;

        itnim->stats.sler++;
        bfa_trc(itnim->fcs, itnim->rport->pwwn);
        bfa_sm_send_event(itnim->rport, RPSM_EVENT_LOGO_IMP);
}

struct bfa_fcs_itnim_s *
bfa_fcs_itnim_lookup(struct bfa_fcs_lport_s *port, wwn_t rpwwn)
{
        struct bfa_fcs_rport_s *rport;
        rport = bfa_fcs_rport_lookup(port, rpwwn);

        if (!rport)
                return NULL;

        WARN_ON(rport->itnim == NULL);
        return rport->itnim;
}

bfa_status_t
bfa_fcs_itnim_attr_get(struct bfa_fcs_lport_s *port, wwn_t rpwwn,
                       struct bfa_itnim_attr_s *attr)
{
        struct bfa_fcs_itnim_s *itnim = NULL;

        itnim = bfa_fcs_itnim_lookup(port, rpwwn);

        if (itnim == NULL)
                return BFA_STATUS_NO_FCPIM_NEXUS;

        attr->state         = bfa_fcs_itnim_sm_to_state(itnim_sm_table, itnim->sm);
        attr->retry         = itnim->seq_rec;
        attr->rec_support   = itnim->rec_support;
        attr->conf_comp     = itnim->conf_comp;
        attr->task_retry_id = itnim->task_retry_id;
        return BFA_STATUS_OK;
}

bfa_status_t
bfa_fcs_itnim_stats_get(struct bfa_fcs_lport_s *port, wwn_t rpwwn,
                        struct bfa_itnim_stats_s *stats)
{
        struct bfa_fcs_itnim_s *itnim = NULL;

        WARN_ON(port == NULL);

        itnim = bfa_fcs_itnim_lookup(port, rpwwn);

        if (itnim == NULL)
                return BFA_STATUS_NO_FCPIM_NEXUS;

        memcpy(stats, &itnim->stats, sizeof(struct bfa_itnim_stats_s));

        return BFA_STATUS_OK;
}

bfa_status_t
bfa_fcs_itnim_stats_clear(struct bfa_fcs_lport_s *port, wwn_t rpwwn)
{
        struct bfa_fcs_itnim_s *itnim = NULL;

        WARN_ON(port == NULL);

        itnim = bfa_fcs_itnim_lookup(port, rpwwn);

        if (itnim == NULL)
                return BFA_STATUS_NO_FCPIM_NEXUS;

        memset(&itnim->stats, 0, sizeof(struct bfa_itnim_stats_s));
        return BFA_STATUS_OK;
}

void
bfa_fcs_fcpim_uf_recv(struct bfa_fcs_itnim_s *itnim,
                        struct fchs_s *fchs, u16 len)
{
        struct fc_els_cmd_s *els_cmd;

        bfa_trc(itnim->fcs, fchs->type);

        if (fchs->type != FC_TYPE_ELS)
                return;

        els_cmd = (struct fc_els_cmd_s *) (fchs + 1);

        bfa_trc(itnim->fcs, els_cmd->els_code);

        switch (els_cmd->els_code) {
        case FC_ELS_PRLO:
                bfa_fcs_rport_prlo(itnim->rport, fchs->ox_id);
                break;

        default:
                WARN_ON(1);
        }
}