/*
 * 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.
 */

/*
 *  bfa_fcs.c BFA FCS main
 */

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

BFA_TRC_FILE(FCS, FCS);

/*
 * FCS sub-modules
 */
struct bfa_fcs_mod_s {
        void            (*attach) (struct bfa_fcs_s *fcs);
        void            (*modinit) (struct bfa_fcs_s *fcs);
        void            (*modexit) (struct bfa_fcs_s *fcs);
};

#define BFA_FCS_MODULE(_mod) { _mod ## _modinit, _mod ## _modexit }

static struct bfa_fcs_mod_s fcs_modules[] = {
        { bfa_fcs_port_attach, NULL, NULL },
        { bfa_fcs_uf_attach, NULL, NULL },
        { bfa_fcs_fabric_attach, bfa_fcs_fabric_modinit,
          bfa_fcs_fabric_modexit },
};

/*
 *  fcs_api BFA FCS API
 */

static void
bfa_fcs_exit_comp(void *fcs_cbarg)
{
        struct bfa_fcs_s      *fcs = fcs_cbarg;
        struct bfad_s         *bfad = fcs->bfad;

        complete(&bfad->comp);
}



/*
 *  fcs_api BFA FCS API
 */

/*
 * fcs attach -- called once to initialize data structures at driver attach time
 */
void
bfa_fcs_attach(struct bfa_fcs_s *fcs, struct bfa_s *bfa, struct bfad_s *bfad,
               bfa_boolean_t min_cfg)
{
        int             i;
        struct bfa_fcs_mod_s  *mod;

        fcs->bfa = bfa;
        fcs->bfad = bfad;
        fcs->min_cfg = min_cfg;
        fcs->num_rport_logins = 0;

        bfa->fcs = BFA_TRUE;
        fcbuild_init();

        for (i = 0; i < sizeof(fcs_modules) / sizeof(fcs_modules[0]); i++) {
                mod = &fcs_modules[i];
                if (mod->attach)
                        mod->attach(fcs);
        }
}

/*
 * fcs initialization, called once after bfa initialization is complete
 */
void
bfa_fcs_init(struct bfa_fcs_s *fcs)
{
        int     i;
        struct bfa_fcs_mod_s  *mod;

        for (i = 0; i < sizeof(fcs_modules) / sizeof(fcs_modules[0]); i++) {
                mod = &fcs_modules[i];
                if (mod->modinit)
                        mod->modinit(fcs);
        }
}

/*
 * FCS update cfg - reset the pwwn/nwwn of fabric base logical port
 * with values learned during bfa_init firmware GETATTR REQ.
 */
void
bfa_fcs_update_cfg(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_fabric_s *fabric = &fcs->fabric;
        struct bfa_lport_cfg_s *port_cfg = &fabric->bport.port_cfg;
        struct bfa_ioc_s *ioc = &fabric->fcs->bfa->ioc;

        port_cfg->nwwn = ioc->attr->nwwn;
        port_cfg->pwwn = ioc->attr->pwwn;
}

/*
 * Stop FCS operations.
 */
void
bfa_fcs_stop(struct bfa_fcs_s *fcs)
{
        bfa_wc_init(&fcs->wc, bfa_fcs_exit_comp, fcs);
        bfa_wc_up(&fcs->wc);
        bfa_fcs_fabric_modstop(fcs);
        bfa_wc_wait(&fcs->wc);
}

/*
 * fcs pbc vport initialization
 */
void
bfa_fcs_pbc_vport_init(struct bfa_fcs_s *fcs)
{
        int i, npbc_vports;
        struct bfi_pbc_vport_s pbc_vports[BFI_PBC_MAX_VPORTS];

        /* Initialize pbc vports */
        if (!fcs->min_cfg) {
                npbc_vports =
                        bfa_iocfc_get_pbc_vports(fcs->bfa, pbc_vports);
                for (i = 0; i < npbc_vports; i++)
                        bfa_fcb_pbc_vport_create(fcs->bfa->bfad, pbc_vports[i]);
        }
}

/*
 *      brief
 *              FCS driver details initialization.
 *
 *      param[in]               fcs             FCS instance
 *      param[in]               driver_info     Driver Details
 *
 *      return None
 */
void
bfa_fcs_driver_info_init(struct bfa_fcs_s *fcs,
                        struct bfa_fcs_driver_info_s *driver_info)
{

        fcs->driver_info = *driver_info;

        bfa_fcs_fabric_psymb_init(&fcs->fabric);
        bfa_fcs_fabric_nsymb_init(&fcs->fabric);
}

/*
 *      brief
 *              FCS instance cleanup and exit.
 *
 *      param[in]               fcs                     FCS instance
 *      return None
 */
void
bfa_fcs_exit(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_mod_s  *mod;
        int             nmods, i;

        bfa_wc_init(&fcs->wc, bfa_fcs_exit_comp, fcs);

        nmods = sizeof(fcs_modules) / sizeof(fcs_modules[0]);

        for (i = 0; i < nmods; i++) {

                mod = &fcs_modules[i];
                if (mod->modexit) {
                        bfa_wc_up(&fcs->wc);
                        mod->modexit(fcs);
                }
        }

        bfa_wc_wait(&fcs->wc);
}


/*
 * Fabric module implementation.
 */

#define BFA_FCS_FABRIC_RETRY_DELAY      (2000)  /* Milliseconds */
#define BFA_FCS_FABRIC_CLEANUP_DELAY    (10000) /* Milliseconds */

#define bfa_fcs_fabric_set_opertype(__fabric) do {                      \
        if (bfa_fcport_get_topology((__fabric)->fcs->bfa)               \
                                == BFA_PORT_TOPOLOGY_P2P) {             \
                if (fabric->fab_type == BFA_FCS_FABRIC_SWITCHED)        \
                        (__fabric)->oper_type = BFA_PORT_TYPE_NPORT;    \
                else                                                    \
                        (__fabric)->oper_type = BFA_PORT_TYPE_P2P;      \
        } else                                                          \
                (__fabric)->oper_type = BFA_PORT_TYPE_NLPORT;           \
} while (0)

/*
 * forward declarations
 */
static void bfa_fcs_fabric_init(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_login(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_notify_online(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_notify_offline(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_delay(void *cbarg);
static void bfa_fcs_fabric_delete(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_delete_comp(void *cbarg);
static void bfa_fcs_fabric_stop(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_stop_comp(void *cbarg);
static void bfa_fcs_fabric_process_uf(struct bfa_fcs_fabric_s *fabric,
                                      struct fchs_s *fchs, u16 len);
static void bfa_fcs_fabric_process_flogi(struct bfa_fcs_fabric_s *fabric,
                                         struct fchs_s *fchs, u16 len);
static void bfa_fcs_fabric_send_flogi_acc(struct bfa_fcs_fabric_s *fabric);
static void bfa_fcs_fabric_flogiacc_comp(void *fcsarg,
                                         struct bfa_fcxp_s *fcxp, void *cbarg,
                                         bfa_status_t status,
                                         u32 rsp_len,
                                         u32 resid_len,
                                         struct fchs_s *rspfchs);
static u8 bfa_fcs_fabric_oper_bbscn(struct bfa_fcs_fabric_s *fabric);
static bfa_boolean_t bfa_fcs_fabric_is_bbscn_enabled(
                                struct bfa_fcs_fabric_s *fabric);

static void     bfa_fcs_fabric_sm_uninit(struct bfa_fcs_fabric_s *fabric,
                                         enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_created(struct bfa_fcs_fabric_s *fabric,
                                          enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_linkdown(struct bfa_fcs_fabric_s *fabric,
                                           enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_flogi(struct bfa_fcs_fabric_s *fabric,
                                        enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_flogi_retry(struct bfa_fcs_fabric_s *fabric,
                                              enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_auth(struct bfa_fcs_fabric_s *fabric,
                                       enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_nofabric(struct bfa_fcs_fabric_s *fabric,
                                           enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_evfp(struct bfa_fcs_fabric_s *fabric,
                                       enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_evfp_done(struct bfa_fcs_fabric_s *fabric,
                                            enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_isolated(struct bfa_fcs_fabric_s *fabric,
                                           enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_deleting(struct bfa_fcs_fabric_s *fabric,
                                           enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_stopping(struct bfa_fcs_fabric_s *fabric,
                                           enum bfa_fcs_fabric_event event);
static void     bfa_fcs_fabric_sm_cleanup(struct bfa_fcs_fabric_s *fabric,
                                          enum bfa_fcs_fabric_event event);
/*
 *   Beginning state before fabric creation.
 */
static void
bfa_fcs_fabric_sm_uninit(struct bfa_fcs_fabric_s *fabric,
                         enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_CREATE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_created);
                bfa_fcs_fabric_init(fabric);
                bfa_fcs_lport_init(&fabric->bport, &fabric->bport.port_cfg);
                break;

        case BFA_FCS_FABRIC_SM_LINK_UP:
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                break;

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

/*
 *   Beginning state before fabric creation.
 */
static void
bfa_fcs_fabric_sm_created(struct bfa_fcs_fabric_s *fabric,
                          enum bfa_fcs_fabric_event event)
{
        struct bfa_s    *bfa = fabric->fcs->bfa;

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_START:
                if (!bfa_fcport_is_linkup(fabric->fcs->bfa)) {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                        break;
                }
                if (bfa_fcport_get_topology(bfa) ==
                                BFA_PORT_TOPOLOGY_LOOP) {
                        fabric->fab_type = BFA_FCS_FABRIC_LOOP;
                        fabric->bport.pid = bfa_fcport_get_myalpa(bfa);
                        fabric->bport.pid = bfa_hton3b(fabric->bport.pid);
                        bfa_sm_set_state(fabric,
                                        bfa_fcs_fabric_sm_online);
                        bfa_fcs_fabric_set_opertype(fabric);
                        bfa_fcs_lport_online(&fabric->bport);
                } else {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_flogi);
                        bfa_fcs_fabric_login(fabric);
                }
                break;

        case BFA_FCS_FABRIC_SM_LINK_UP:
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

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

/*
 *   Link is down, awaiting LINK UP event from port. This is also the
 *   first state at fabric creation.
 */
static void
bfa_fcs_fabric_sm_linkdown(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        struct bfa_s    *bfa = fabric->fcs->bfa;

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_LINK_UP:
                if (bfa_fcport_get_topology(bfa) != BFA_PORT_TOPOLOGY_LOOP) {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_flogi);
                        bfa_fcs_fabric_login(fabric);
                        break;
                }
                fabric->fab_type = BFA_FCS_FABRIC_LOOP;
                fabric->bport.pid = bfa_fcport_get_myalpa(bfa);
                fabric->bport.pid = bfa_hton3b(fabric->bport.pid);
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_online);
                bfa_fcs_fabric_set_opertype(fabric);
                bfa_fcs_lport_online(&fabric->bport);
                break;

        case BFA_FCS_FABRIC_SM_RETRY_OP:
        case BFA_FCS_FABRIC_SM_LOOPBACK:
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

        case BFA_FCS_FABRIC_SM_STOP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
                bfa_fcs_fabric_stop(fabric);
                break;

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

/*
 *   FLOGI is in progress, awaiting FLOGI reply.
 */
static void
bfa_fcs_fabric_sm_flogi(struct bfa_fcs_fabric_s *fabric,
                        enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_CONT_OP:

                bfa_fcport_set_tx_bbcredit(fabric->fcs->bfa,
                                           fabric->bb_credit,
                                           bfa_fcs_fabric_oper_bbscn(fabric));
                fabric->fab_type = BFA_FCS_FABRIC_SWITCHED;

                if (fabric->auth_reqd && fabric->is_auth) {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_auth);
                        bfa_trc(fabric->fcs, event);
                } else {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_online);
                        bfa_fcs_fabric_notify_online(fabric);
                }
                break;

        case BFA_FCS_FABRIC_SM_RETRY_OP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_flogi_retry);
                bfa_timer_start(fabric->fcs->bfa, &fabric->delay_timer,
                                bfa_fcs_fabric_delay, fabric,
                                BFA_FCS_FABRIC_RETRY_DELAY);
                break;

        case BFA_FCS_FABRIC_SM_LOOPBACK:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_loopback);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                bfa_fcs_fabric_set_opertype(fabric);
                break;

        case BFA_FCS_FABRIC_SM_NO_FABRIC:
                fabric->fab_type = BFA_FCS_FABRIC_N2N;
                bfa_fcport_set_tx_bbcredit(fabric->fcs->bfa,
                                           fabric->bb_credit,
                                           bfa_fcs_fabric_oper_bbscn(fabric));
                bfa_fcs_fabric_notify_online(fabric);
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_nofabric);
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                bfa_fcs_fabric_delete(fabric);
                break;

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


static void
bfa_fcs_fabric_sm_flogi_retry(struct bfa_fcs_fabric_s *fabric,
                              enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_DELAYED:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_flogi);
                bfa_fcs_fabric_login(fabric);
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_timer_stop(&fabric->delay_timer);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_timer_stop(&fabric->delay_timer);
                bfa_fcs_fabric_delete(fabric);
                break;

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

/*
 *   Authentication is in progress, awaiting authentication results.
 */
static void
bfa_fcs_fabric_sm_auth(struct bfa_fcs_fabric_s *fabric,
                       enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_AUTH_FAILED:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_auth_failed);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                break;

        case BFA_FCS_FABRIC_SM_AUTH_SUCCESS:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_online);
                bfa_fcs_fabric_notify_online(fabric);
                break;

        case BFA_FCS_FABRIC_SM_PERF_EVFP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_evfp);
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

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

/*
 *   Authentication failed
 */
void
bfa_fcs_fabric_sm_auth_failed(struct bfa_fcs_fabric_s *fabric,
                              enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_fcs_fabric_notify_offline(fabric);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

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

/*
 *   Port is in loopback mode.
 */
void
bfa_fcs_fabric_sm_loopback(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_fcs_fabric_notify_offline(fabric);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

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

/*
 *   There is no attached fabric - private loop or NPort-to-NPort topology.
 */
static void
bfa_fcs_fabric_sm_nofabric(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                bfa_fcs_fabric_notify_offline(fabric);
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

        case BFA_FCS_FABRIC_SM_NO_FABRIC:
                bfa_trc(fabric->fcs, fabric->bb_credit);
                bfa_fcport_set_tx_bbcredit(fabric->fcs->bfa,
                                           fabric->bb_credit,
                                           bfa_fcs_fabric_oper_bbscn(fabric));
                break;

        case BFA_FCS_FABRIC_SM_RETRY_OP:
                break;

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

/*
 *   Fabric is online - normal operating state.
 */
void
bfa_fcs_fabric_sm_online(struct bfa_fcs_fabric_s *fabric,
                         enum bfa_fcs_fabric_event event)
{
        struct bfa_s    *bfa = fabric->fcs->bfa;

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_linkdown);
                if (bfa_fcport_get_topology(bfa) == BFA_PORT_TOPOLOGY_LOOP) {
                        bfa_fcs_lport_offline(&fabric->bport);
                } else {
                        bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                        bfa_fcs_fabric_notify_offline(fabric);
                }
                break;

        case BFA_FCS_FABRIC_SM_DELETE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_deleting);
                bfa_fcs_fabric_delete(fabric);
                break;

        case BFA_FCS_FABRIC_SM_STOP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_stopping);
                bfa_fcs_fabric_stop(fabric);
                break;

        case BFA_FCS_FABRIC_SM_AUTH_FAILED:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_auth_failed);
                bfa_sm_send_event(fabric->lps, BFA_LPS_SM_OFFLINE);
                break;

        case BFA_FCS_FABRIC_SM_AUTH_SUCCESS:
                break;

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

/*
 *   Exchanging virtual fabric parameters.
 */
static void
bfa_fcs_fabric_sm_evfp(struct bfa_fcs_fabric_s *fabric,
                       enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_CONT_OP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_evfp_done);
                break;

        case BFA_FCS_FABRIC_SM_ISOLATE:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_isolated);
                break;

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

/*
 *   EVFP exchange complete and VFT tagging is enabled.
 */
static void
bfa_fcs_fabric_sm_evfp_done(struct bfa_fcs_fabric_s *fabric,
                            enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);
}

/*
 *   Port is isolated after EVFP exchange due to VF_ID mismatch (N and F).
 */
static void
bfa_fcs_fabric_sm_isolated(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        struct bfad_s *bfad = (struct bfad_s *)fabric->fcs->bfad;
        char    pwwn_ptr[BFA_STRING_32];

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);
        wwn2str(pwwn_ptr, fabric->bport.port_cfg.pwwn);

        BFA_LOG(KERN_INFO, bfad, bfa_log_level,
                "Port is isolated due to VF_ID mismatch. "
                "PWWN: %s Port VF_ID: %04x switch port VF_ID: %04x.",
                pwwn_ptr, fabric->fcs->port_vfid,
                fabric->event_arg.swp_vfid);
}

/*
 *   Fabric is being deleted, awaiting vport delete completions.
 */
static void
bfa_fcs_fabric_sm_deleting(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_DELCOMP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_uninit);
                bfa_wc_down(&fabric->fcs->wc);
                break;

        case BFA_FCS_FABRIC_SM_LINK_UP:
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                bfa_fcs_fabric_notify_offline(fabric);
                break;

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

/*
 * Fabric is being stopped, awaiting vport stop completions.
 */
static void
bfa_fcs_fabric_sm_stopping(struct bfa_fcs_fabric_s *fabric,
                           enum bfa_fcs_fabric_event event)
{
        struct bfa_s    *bfa = fabric->fcs->bfa;

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_STOPCOMP:
                if (bfa_fcport_get_topology(bfa) == BFA_PORT_TOPOLOGY_LOOP) {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_created);
                } else {
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
                        bfa_sm_send_event(fabric->lps, BFA_LPS_SM_LOGOUT);
                }
                break;

        case BFA_FCS_FABRIC_SM_LINK_UP:
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                if (bfa_fcport_get_topology(bfa) == BFA_PORT_TOPOLOGY_LOOP)
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_created);
                else
                        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_cleanup);
                break;

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

/*
 * Fabric is being stopped, cleanup without FLOGO
 */
static void
bfa_fcs_fabric_sm_cleanup(struct bfa_fcs_fabric_s *fabric,
                          enum bfa_fcs_fabric_event event)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, event);

        switch (event) {
        case BFA_FCS_FABRIC_SM_STOPCOMP:
        case BFA_FCS_FABRIC_SM_LOGOCOMP:
                bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_created);
                bfa_wc_down(&(fabric->fcs)->wc);
                break;

        case BFA_FCS_FABRIC_SM_LINK_DOWN:
                /*
                 * Ignore - can get this event if we get notified about IOC down
                 * before the fabric completion callbk is done.
                 */
                break;

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

/*
 *  fcs_fabric_private fabric private functions
 */

static void
bfa_fcs_fabric_init(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_lport_cfg_s *port_cfg = &fabric->bport.port_cfg;

        port_cfg->roles = BFA_LPORT_ROLE_FCP_IM;
        port_cfg->nwwn = fabric->fcs->bfa->ioc.attr->nwwn;
        port_cfg->pwwn = fabric->fcs->bfa->ioc.attr->pwwn;
}

/*
 * Port Symbolic Name Creation for base port.
 */
void
bfa_fcs_fabric_psymb_init(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_lport_cfg_s *port_cfg = &fabric->bport.port_cfg;
        char model[BFA_ADAPTER_MODEL_NAME_LEN] = {0};
        struct bfa_fcs_driver_info_s *driver_info = &fabric->fcs->driver_info;

        bfa_ioc_get_adapter_model(&fabric->fcs->bfa->ioc, model);

        /* Model name/number */
        strncpy((char *)&port_cfg->sym_name, model,
                BFA_FCS_PORT_SYMBNAME_MODEL_SZ);
        strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /* Driver Version */
        strncat((char *)&port_cfg->sym_name, (char *)driver_info->version,
                BFA_FCS_PORT_SYMBNAME_VERSION_SZ);
        strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /* Host machine name */
        strncat((char *)&port_cfg->sym_name,
                (char *)driver_info->host_machine_name,
                BFA_FCS_PORT_SYMBNAME_MACHINENAME_SZ);
        strncat((char *)&port_cfg->sym_name, BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /*
         * Host OS Info :
         * If OS Patch Info is not there, do not truncate any bytes from the
         * OS name string and instead copy the entire OS info string (64 bytes).
         */
        if (driver_info->host_os_patch[0] == '\0') {
                strncat((char *)&port_cfg->sym_name,
                        (char *)driver_info->host_os_name,
                        BFA_FCS_OS_STR_LEN);
                strncat((char *)&port_cfg->sym_name,
                        BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                        sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));
        } else {
                strncat((char *)&port_cfg->sym_name,
                        (char *)driver_info->host_os_name,
                        BFA_FCS_PORT_SYMBNAME_OSINFO_SZ);
                strncat((char *)&port_cfg->sym_name,
                        BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                        sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

                /* Append host OS Patch Info */
                strncat((char *)&port_cfg->sym_name,
                        (char *)driver_info->host_os_patch,
                        BFA_FCS_PORT_SYMBNAME_OSPATCH_SZ);
        }

        /* null terminate */
        port_cfg->sym_name.symname[BFA_SYMNAME_MAXLEN - 1] = 0;
}

/*
 * Node Symbolic Name Creation for base port and all vports
 */
void
bfa_fcs_fabric_nsymb_init(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_lport_cfg_s *port_cfg = &fabric->bport.port_cfg;
        char model[BFA_ADAPTER_MODEL_NAME_LEN] = {0};
        struct bfa_fcs_driver_info_s *driver_info = &fabric->fcs->driver_info;

        bfa_ioc_get_adapter_model(&fabric->fcs->bfa->ioc, model);

        /* Model name/number */
        strncpy((char *)&port_cfg->node_sym_name, model,
                BFA_FCS_PORT_SYMBNAME_MODEL_SZ);
        strncat((char *)&port_cfg->node_sym_name,
                        BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                        sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /* Driver Version */
        strncat((char *)&port_cfg->node_sym_name, (char *)driver_info->version,
                BFA_FCS_PORT_SYMBNAME_VERSION_SZ);
        strncat((char *)&port_cfg->node_sym_name,
                        BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                        sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /* Host machine name */
        strncat((char *)&port_cfg->node_sym_name,
                (char *)driver_info->host_machine_name,
                BFA_FCS_PORT_SYMBNAME_MACHINENAME_SZ);
        strncat((char *)&port_cfg->node_sym_name,
                        BFA_FCS_PORT_SYMBNAME_SEPARATOR,
                        sizeof(BFA_FCS_PORT_SYMBNAME_SEPARATOR));

        /* null terminate */
        port_cfg->node_sym_name.symname[BFA_SYMNAME_MAXLEN - 1] = 0;
}

/*
 * bfa lps login completion callback
 */
void
bfa_cb_lps_flogi_comp(void *bfad, void *uarg, bfa_status_t status)
{
        struct bfa_fcs_fabric_s *fabric = uarg;

        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_trc(fabric->fcs, status);

        switch (status) {
        case BFA_STATUS_OK:
                fabric->stats.flogi_accepts++;
                break;

        case BFA_STATUS_INVALID_MAC:
                /* Only for CNA */
                fabric->stats.flogi_acc_err++;
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_RETRY_OP);

                return;

        case BFA_STATUS_EPROTOCOL:
                switch (fabric->lps->ext_status) {
                case BFA_EPROTO_BAD_ACCEPT:
                        fabric->stats.flogi_acc_err++;
                        break;

                case BFA_EPROTO_UNKNOWN_RSP:
                        fabric->stats.flogi_unknown_rsp++;
                        break;

                default:
                        break;
                }
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_RETRY_OP);

                return;

        case BFA_STATUS_FABRIC_RJT:
                fabric->stats.flogi_rejects++;
                if (fabric->lps->lsrjt_rsn == FC_LS_RJT_RSN_LOGICAL_ERROR &&
                    fabric->lps->lsrjt_expl == FC_LS_RJT_EXP_NO_ADDL_INFO)
                        fabric->fcs->bbscn_flogi_rjt = BFA_TRUE;

                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_RETRY_OP);
                return;

        default:
                fabric->stats.flogi_rsp_err++;
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_RETRY_OP);
                return;
        }

        fabric->bb_credit = fabric->lps->pr_bbcred;
        bfa_trc(fabric->fcs, fabric->bb_credit);

        if (!(fabric->lps->brcd_switch))
                fabric->fabric_name =  fabric->lps->pr_nwwn;

        /*
         * Check port type. It should be 1 = F-port.
         */
        if (fabric->lps->fport) {
                fabric->bport.pid = fabric->lps->lp_pid;
                fabric->is_npiv = fabric->lps->npiv_en;
                fabric->is_auth = fabric->lps->auth_req;
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_CONT_OP);
        } else {
                /*
                 * Nport-2-Nport direct attached
                 */
                fabric->bport.port_topo.pn2n.rem_port_wwn =
                        fabric->lps->pr_pwwn;

                fabric->fab_type = BFA_FCS_FABRIC_N2N;
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_NO_FABRIC);
        }

        bfa_trc(fabric->fcs, fabric->bport.pid);
        bfa_trc(fabric->fcs, fabric->is_npiv);
        bfa_trc(fabric->fcs, fabric->is_auth);
}
/*
 *              Allocate and send FLOGI.
 */
static void
bfa_fcs_fabric_login(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_s            *bfa = fabric->fcs->bfa;
        struct bfa_lport_cfg_s  *pcfg = &fabric->bport.port_cfg;
        u8                      alpa = 0, bb_scn = 0;

        if (bfa_fcs_fabric_is_bbscn_enabled(fabric) &&
            (!fabric->fcs->bbscn_flogi_rjt))
                bb_scn = BFA_FCS_PORT_DEF_BB_SCN;

        bfa_lps_flogi(fabric->lps, fabric, alpa, bfa_fcport_get_maxfrsize(bfa),
                      pcfg->pwwn, pcfg->nwwn, fabric->auth_reqd, bb_scn);

        fabric->stats.flogi_sent++;
}

static void
bfa_fcs_fabric_notify_online(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_fcs_vport_s *vport;
        struct list_head              *qe, *qen;

        bfa_trc(fabric->fcs, fabric->fabric_name);

        bfa_fcs_fabric_set_opertype(fabric);
        fabric->stats.fabric_onlines++;

        /*
         * notify online event to base and then virtual ports
         */
        bfa_fcs_lport_online(&fabric->bport);

        list_for_each_safe(qe, qen, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                bfa_fcs_vport_online(vport);
        }
}

static void
bfa_fcs_fabric_notify_offline(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_fcs_vport_s *vport;
        struct list_head              *qe, *qen;

        bfa_trc(fabric->fcs, fabric->fabric_name);
        fabric->stats.fabric_offlines++;

        /*
         * notify offline event first to vports and then base port.
         */
        list_for_each_safe(qe, qen, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                bfa_fcs_vport_offline(vport);
        }

        bfa_fcs_lport_offline(&fabric->bport);

        fabric->fabric_name = 0;
        fabric->fabric_ip_addr[0] = 0;
}

static void
bfa_fcs_fabric_delay(void *cbarg)
{
        struct bfa_fcs_fabric_s *fabric = cbarg;

        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_DELAYED);
}

/*
 * Stop all vports and wait for vport stop completions.
 */
static void
bfa_fcs_fabric_stop(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_fcs_vport_s *vport;
        struct list_head        *qe, *qen;

        bfa_wc_init(&fabric->stop_wc, bfa_fcs_fabric_stop_comp, fabric);

        list_for_each_safe(qe, qen, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                bfa_wc_up(&fabric->stop_wc);
                bfa_fcs_vport_fcs_stop(vport);
        }

        bfa_wc_up(&fabric->stop_wc);
        bfa_fcs_lport_stop(&fabric->bport);
        bfa_wc_wait(&fabric->stop_wc);
}

/*
 * Computes operating BB_SCN value
 */
static u8
bfa_fcs_fabric_oper_bbscn(struct bfa_fcs_fabric_s *fabric)
{
        u8      pr_bbscn = fabric->lps->pr_bbscn;
        struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(fabric->fcs->bfa);

        if (!(fcport->cfg.bb_scn_state && pr_bbscn))
                return 0;

        /* return max of local/remote bb_scn values */
        return ((pr_bbscn > BFA_FCS_PORT_DEF_BB_SCN) ?
                pr_bbscn : BFA_FCS_PORT_DEF_BB_SCN);
}

/*
 * Check if BB_SCN can be enabled.
 */
static bfa_boolean_t
bfa_fcs_fabric_is_bbscn_enabled(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(fabric->fcs->bfa);

        if (bfa_ioc_get_fcmode(&fabric->fcs->bfa->ioc) &&
                        fcport->cfg.bb_scn_state &&
                        !bfa_fcport_is_qos_enabled(fabric->fcs->bfa) &&
                        !bfa_fcport_is_trunk_enabled(fabric->fcs->bfa))
                return BFA_TRUE;
        else
                return BFA_FALSE;
}

/*
 * Delete all vports and wait for vport delete completions.
 */
static void
bfa_fcs_fabric_delete(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_fcs_vport_s *vport;
        struct list_head              *qe, *qen;

        list_for_each_safe(qe, qen, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                bfa_fcs_vport_fcs_delete(vport);
        }

        bfa_fcs_lport_delete(&fabric->bport);
        bfa_wc_wait(&fabric->wc);
}

static void
bfa_fcs_fabric_delete_comp(void *cbarg)
{
        struct bfa_fcs_fabric_s *fabric = cbarg;

        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_DELCOMP);
}

static void
bfa_fcs_fabric_stop_comp(void *cbarg)
{
        struct bfa_fcs_fabric_s *fabric = cbarg;

        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_STOPCOMP);
}

/*
 *  fcs_fabric_public fabric public functions
 */

/*
 * Attach time initialization.
 */
void
bfa_fcs_fabric_attach(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_fabric_s *fabric;

        fabric = &fcs->fabric;
        memset(fabric, 0, sizeof(struct bfa_fcs_fabric_s));

        /*
         * Initialize base fabric.
         */
        fabric->fcs = fcs;
        INIT_LIST_HEAD(&fabric->vport_q);
        INIT_LIST_HEAD(&fabric->vf_q);
        fabric->lps = bfa_lps_alloc(fcs->bfa);
        WARN_ON(!fabric->lps);

        /*
         * Initialize fabric delete completion handler. Fabric deletion is
         * complete when the last vport delete is complete.
         */
        bfa_wc_init(&fabric->wc, bfa_fcs_fabric_delete_comp, fabric);
        bfa_wc_up(&fabric->wc); /* For the base port */

        bfa_sm_set_state(fabric, bfa_fcs_fabric_sm_uninit);
        bfa_fcs_lport_attach(&fabric->bport, fabric->fcs, FC_VF_ID_NULL, NULL);
}

void
bfa_fcs_fabric_modinit(struct bfa_fcs_s *fcs)
{
        bfa_sm_send_event(&fcs->fabric, BFA_FCS_FABRIC_SM_CREATE);
        bfa_trc(fcs, 0);
}

/*
 *   Module cleanup
 */
void
bfa_fcs_fabric_modexit(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_fabric_s *fabric;

        bfa_trc(fcs, 0);

        /*
         * Cleanup base fabric.
         */
        fabric = &fcs->fabric;
        bfa_lps_delete(fabric->lps);
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_DELETE);
}

/*
 * Fabric module stop -- stop FCS actions
 */
void
bfa_fcs_fabric_modstop(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_fabric_s *fabric;

        bfa_trc(fcs, 0);
        fabric = &fcs->fabric;
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_STOP);
}

/*
 * Fabric module start -- kick starts FCS actions
 */
void
bfa_fcs_fabric_modstart(struct bfa_fcs_s *fcs)
{
        struct bfa_fcs_fabric_s *fabric;

        bfa_trc(fcs, 0);
        fabric = &fcs->fabric;
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_START);
}


/*
 *   Link up notification from BFA physical port module.
 */
void
bfa_fcs_fabric_link_up(struct bfa_fcs_fabric_s *fabric)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_LINK_UP);
}

/*
 *   Link down notification from BFA physical port module.
 */
void
bfa_fcs_fabric_link_down(struct bfa_fcs_fabric_s *fabric)
{
        bfa_trc(fabric->fcs, fabric->bport.port_cfg.pwwn);
        fabric->fcs->bbscn_flogi_rjt = BFA_FALSE;
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_LINK_DOWN);
}

/*
 *   A child vport is being created in the fabric.
 *
 *   Call from vport module at vport creation. A list of base port and vports
 *   belonging to a fabric is maintained to propagate link events.
 *
 *   param[in] fabric - Fabric instance. This can be a base fabric or vf.
 *   param[in] vport  - Vport being created.
 *
 *   @return None (always succeeds)
 */
void
bfa_fcs_fabric_addvport(struct bfa_fcs_fabric_s *fabric,
                        struct bfa_fcs_vport_s *vport)
{
        /*
         * - add vport to fabric's vport_q
         */
        bfa_trc(fabric->fcs, fabric->vf_id);

        list_add_tail(&vport->qe, &fabric->vport_q);
        fabric->num_vports++;
        bfa_wc_up(&fabric->wc);
}

/*
 *   A child vport is being deleted from fabric.
 *
 *   Vport is being deleted.
 */
void
bfa_fcs_fabric_delvport(struct bfa_fcs_fabric_s *fabric,
                        struct bfa_fcs_vport_s *vport)
{
        list_del(&vport->qe);
        fabric->num_vports--;
        bfa_wc_down(&fabric->wc);
}


/*
 * Lookup for a vport within a fabric given its pwwn
 */
struct bfa_fcs_vport_s *
bfa_fcs_fabric_vport_lookup(struct bfa_fcs_fabric_s *fabric, wwn_t pwwn)
{
        struct bfa_fcs_vport_s *vport;
        struct list_head              *qe;

        list_for_each(qe, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                if (bfa_fcs_lport_get_pwwn(&vport->lport) == pwwn)
                        return vport;
        }

        return NULL;
}


/*
 *  Get OUI of the attached switch.
 *
 *  Note : Use of this function should be avoided as much as possible.
 *         This function should be used only if there is any requirement
*          to check for FOS version below 6.3.
 *         To check if the attached fabric is a brocade fabric, use
 *         bfa_lps_is_brcd_fabric() which works for FOS versions 6.3
 *         or above only.
 */

u16
bfa_fcs_fabric_get_switch_oui(struct bfa_fcs_fabric_s *fabric)
{
        wwn_t fab_nwwn;
        u8 *tmp;
        u16 oui;

        fab_nwwn = fabric->lps->pr_nwwn;

        tmp = (u8 *)&fab_nwwn;
        oui = (tmp[3] << 8) | tmp[4];

        return oui;
}
/*
 *              Unsolicited frame receive handling.
 */
void
bfa_fcs_fabric_uf_recv(struct bfa_fcs_fabric_s *fabric, struct fchs_s *fchs,
                       u16 len)
{
        u32     pid = fchs->d_id;
        struct bfa_fcs_vport_s *vport;
        struct list_head              *qe;
        struct fc_els_cmd_s *els_cmd = (struct fc_els_cmd_s *) (fchs + 1);
        struct fc_logi_s *flogi = (struct fc_logi_s *) els_cmd;

        bfa_trc(fabric->fcs, len);
        bfa_trc(fabric->fcs, pid);

        /*
         * Look for our own FLOGI frames being looped back. This means an
         * external loopback cable is in place. Our own FLOGI frames are
         * sometimes looped back when switch port gets temporarily bypassed.
         */
        if ((pid == bfa_ntoh3b(FC_FABRIC_PORT)) &&
            (els_cmd->els_code == FC_ELS_FLOGI) &&
            (flogi->port_name == bfa_fcs_lport_get_pwwn(&fabric->bport))) {
                bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_LOOPBACK);
                return;
        }

        /*
         * FLOGI/EVFP exchanges should be consumed by base fabric.
         */
        if (fchs->d_id == bfa_hton3b(FC_FABRIC_PORT)) {
                bfa_trc(fabric->fcs, pid);
                bfa_fcs_fabric_process_uf(fabric, fchs, len);
                return;
        }

        if (fabric->bport.pid == pid) {
                /*
                 * All authentication frames should be routed to auth
                 */
                bfa_trc(fabric->fcs, els_cmd->els_code);
                if (els_cmd->els_code == FC_ELS_AUTH) {
                        bfa_trc(fabric->fcs, els_cmd->els_code);
                        return;
                }

                bfa_trc(fabric->fcs, *(u8 *) ((u8 *) fchs));
                bfa_fcs_lport_uf_recv(&fabric->bport, fchs, len);
                return;
        }

        /*
         * look for a matching local port ID
         */
        list_for_each(qe, &fabric->vport_q) {
                vport = (struct bfa_fcs_vport_s *) qe;
                if (vport->lport.pid == pid) {
                        bfa_fcs_lport_uf_recv(&vport->lport, fchs, len);
                        return;
                }
        }

        if (!bfa_fcs_fabric_is_switched(fabric))
                bfa_fcs_lport_uf_recv(&fabric->bport, fchs, len);

        bfa_trc(fabric->fcs, fchs->type);
}

/*
 *              Unsolicited frames to be processed by fabric.
 */
static void
bfa_fcs_fabric_process_uf(struct bfa_fcs_fabric_s *fabric, struct fchs_s *fchs,
                          u16 len)
{
        struct fc_els_cmd_s *els_cmd = (struct fc_els_cmd_s *) (fchs + 1);

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

        switch (els_cmd->els_code) {
        case FC_ELS_FLOGI:
                bfa_fcs_fabric_process_flogi(fabric, fchs, len);
                break;

        default:
                /*
                 * need to generate a LS_RJT
                 */
                break;
        }
}

/*
 *      Process incoming FLOGI
 */
static void
bfa_fcs_fabric_process_flogi(struct bfa_fcs_fabric_s *fabric,
                        struct fchs_s *fchs, u16 len)
{
        struct fc_logi_s *flogi = (struct fc_logi_s *) (fchs + 1);
        struct bfa_fcs_lport_s *bport = &fabric->bport;

        bfa_trc(fabric->fcs, fchs->s_id);

        fabric->stats.flogi_rcvd++;
        /*
         * Check port type. It should be 0 = n-port.
         */
        if (flogi->csp.port_type) {
                /*
                 * @todo: may need to send a LS_RJT
                 */
                bfa_trc(fabric->fcs, flogi->port_name);
                fabric->stats.flogi_rejected++;
                return;
        }

        fabric->bb_credit = be16_to_cpu(flogi->csp.bbcred);
        fabric->lps->pr_bbscn = (be16_to_cpu(flogi->csp.rxsz) >> 12);
        bport->port_topo.pn2n.rem_port_wwn = flogi->port_name;
        bport->port_topo.pn2n.reply_oxid = fchs->ox_id;

        /*
         * Send a Flogi Acc
         */
        bfa_fcs_fabric_send_flogi_acc(fabric);
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_NO_FABRIC);
}

static void
bfa_fcs_fabric_send_flogi_acc(struct bfa_fcs_fabric_s *fabric)
{
        struct bfa_lport_cfg_s *pcfg = &fabric->bport.port_cfg;
        struct bfa_fcs_lport_n2n_s *n2n_port = &fabric->bport.port_topo.pn2n;
        struct bfa_s      *bfa = fabric->fcs->bfa;
        struct bfa_fcxp_s *fcxp;
        u16     reqlen;
        struct fchs_s   fchs;

        fcxp = bfa_fcs_fcxp_alloc(fabric->fcs, BFA_FALSE);
        /*
         * Do not expect this failure -- expect remote node to retry
         */
        if (!fcxp)
                return;

        reqlen = fc_flogi_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp),
                                    bfa_hton3b(FC_FABRIC_PORT),
                                    n2n_port->reply_oxid, pcfg->pwwn,
                                    pcfg->nwwn,
                                    bfa_fcport_get_maxfrsize(bfa),
                                    bfa_fcport_get_rx_bbcredit(bfa),
                                    bfa_fcs_fabric_oper_bbscn(fabric));

        bfa_fcxp_send(fcxp, NULL, fabric->vf_id, fabric->lps->bfa_tag,
                      BFA_FALSE, FC_CLASS_3,
                      reqlen, &fchs, bfa_fcs_fabric_flogiacc_comp, fabric,
                      FC_MAX_PDUSZ, 0);
}

/*
 *   Flogi Acc completion callback.
 */
static void
bfa_fcs_fabric_flogiacc_comp(void *fcsarg, struct bfa_fcxp_s *fcxp, void *cbarg,
                             bfa_status_t status, u32 rsp_len,
                             u32 resid_len, struct fchs_s *rspfchs)
{
        struct bfa_fcs_fabric_s *fabric = cbarg;

        bfa_trc(fabric->fcs, status);
}


/*
 * Send AEN notification
 */
static void
bfa_fcs_fabric_aen_post(struct bfa_fcs_lport_s *port,
                        enum bfa_port_aen_event event)
{
        struct bfad_s *bfad = (struct bfad_s *)port->fabric->fcs->bfad;
        struct bfa_aen_entry_s  *aen_entry;

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

        aen_entry->aen_data.port.pwwn = bfa_fcs_lport_get_pwwn(port);
        aen_entry->aen_data.port.fwwn = bfa_fcs_lport_get_fabric_name(port);

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

/*
 *
 * @param[in] fabric - fabric
 * @param[in] wwn_t - new fabric name
 *
 * @return - none
 */
void
bfa_fcs_fabric_set_fabric_name(struct bfa_fcs_fabric_s *fabric,
                               wwn_t fabric_name)
{
        struct bfad_s *bfad = (struct bfad_s *)fabric->fcs->bfad;
        char    pwwn_ptr[BFA_STRING_32];
        char    fwwn_ptr[BFA_STRING_32];

        bfa_trc(fabric->fcs, fabric_name);

        if (fabric->fabric_name == 0) {
                /*
                 * With BRCD switches, we don't get Fabric Name in FLOGI.
                 * Don't generate a fabric name change event in this case.
                 */
                fabric->fabric_name = fabric_name;
        } else {
                fabric->fabric_name = fabric_name;
                wwn2str(pwwn_ptr, bfa_fcs_lport_get_pwwn(&fabric->bport));
                wwn2str(fwwn_ptr,
                        bfa_fcs_lport_get_fabric_name(&fabric->bport));
                BFA_LOG(KERN_WARNING, bfad, bfa_log_level,
                        "Base port WWN = %s Fabric WWN = %s\n",
                        pwwn_ptr, fwwn_ptr);
                bfa_fcs_fabric_aen_post(&fabric->bport,
                                BFA_PORT_AEN_FABRIC_NAME_CHANGE);
        }
}

void
bfa_cb_lps_flogo_comp(void *bfad, void *uarg)
{
        struct bfa_fcs_fabric_s *fabric = uarg;
        bfa_sm_send_event(fabric, BFA_FCS_FABRIC_SM_LOGOCOMP);
}

/*
 *      Returns FCS vf structure for a given vf_id.
 *
 *      param[in]       vf_id - VF_ID
 *
 *      return
 *      If lookup succeeds, retuns fcs vf object, otherwise returns NULL
 */
bfa_fcs_vf_t   *
bfa_fcs_vf_lookup(struct bfa_fcs_s *fcs, u16 vf_id)
{
        bfa_trc(fcs, vf_id);
        if (vf_id == FC_VF_ID_NULL)
                return &fcs->fabric;

        return NULL;
}

/*
 *      Return the list of local logical ports present in the given VF.
 *
 *      @param[in]      vf      vf for which logical ports are returned
 *      @param[out]     lpwwn   returned logical port wwn list
 *      @param[in,out]  nlports in:size of lpwwn list;
 *                              out:total elements present,
 *                              actual elements returned is limited by the size
 */
void
bfa_fcs_vf_get_ports(bfa_fcs_vf_t *vf, wwn_t lpwwn[], int *nlports)
{
        struct list_head *qe;
        struct bfa_fcs_vport_s *vport;
        int     i = 0;
        struct bfa_fcs_s        *fcs;

        if (vf == NULL || lpwwn == NULL || *nlports == 0)
                return;

        fcs = vf->fcs;

        bfa_trc(fcs, vf->vf_id);
        bfa_trc(fcs, (uint32_t) *nlports);

        lpwwn[i++] = vf->bport.port_cfg.pwwn;

        list_for_each(qe, &vf->vport_q) {
                if (i >= *nlports)
                        break;

                vport = (struct bfa_fcs_vport_s *) qe;
                lpwwn[i++] = vport->lport.port_cfg.pwwn;
        }

        bfa_trc(fcs, i);
        *nlports = i;
}

/*
 * BFA FCS PPORT ( physical port)
 */
static void
bfa_fcs_port_event_handler(void *cbarg, enum bfa_port_linkstate event)
{
        struct bfa_fcs_s      *fcs = cbarg;

        bfa_trc(fcs, event);

        switch (event) {
        case BFA_PORT_LINKUP:
                bfa_fcs_fabric_link_up(&fcs->fabric);
                break;

        case BFA_PORT_LINKDOWN:
                bfa_fcs_fabric_link_down(&fcs->fabric);
                break;

        default:
                WARN_ON(1);
        }
}

void
bfa_fcs_port_attach(struct bfa_fcs_s *fcs)
{
        bfa_fcport_event_register(fcs->bfa, bfa_fcs_port_event_handler, fcs);
}

/*
 * BFA FCS UF ( Unsolicited Frames)
 */

/*
 *              BFA callback for unsolicited frame receive handler.
 *
 * @param[in]           cbarg           callback arg for receive handler
 * @param[in]           uf              unsolicited frame descriptor
 *
 * @return None
 */
static void
bfa_fcs_uf_recv(void *cbarg, struct bfa_uf_s *uf)
{
        struct bfa_fcs_s        *fcs = (struct bfa_fcs_s *) cbarg;
        struct fchs_s   *fchs = bfa_uf_get_frmbuf(uf);
        u16     len = bfa_uf_get_frmlen(uf);
        struct fc_vft_s *vft;
        struct bfa_fcs_fabric_s *fabric;

        /*
         * check for VFT header
         */
        if (fchs->routing == FC_RTG_EXT_HDR &&
            fchs->cat_info == FC_CAT_VFT_HDR) {
                bfa_stats(fcs, uf.tagged);
                vft = bfa_uf_get_frmbuf(uf);
                if (fcs->port_vfid == vft->vf_id)
                        fabric = &fcs->fabric;
                else
                        fabric = bfa_fcs_vf_lookup(fcs, (u16) vft->vf_id);

                /*
                 * drop frame if vfid is unknown
                 */
                if (!fabric) {
                        WARN_ON(1);
                        bfa_stats(fcs, uf.vfid_unknown);
                        bfa_uf_free(uf);
                        return;
                }

                /*
                 * skip vft header
                 */
                fchs = (struct fchs_s *) (vft + 1);
                len -= sizeof(struct fc_vft_s);

                bfa_trc(fcs, vft->vf_id);
        } else {
                bfa_stats(fcs, uf.untagged);
                fabric = &fcs->fabric;
        }

        bfa_trc(fcs, ((u32 *) fchs)[0]);
        bfa_trc(fcs, ((u32 *) fchs)[1]);
        bfa_trc(fcs, ((u32 *) fchs)[2]);
        bfa_trc(fcs, ((u32 *) fchs)[3]);
        bfa_trc(fcs, ((u32 *) fchs)[4]);
        bfa_trc(fcs, ((u32 *) fchs)[5]);
        bfa_trc(fcs, len);

        bfa_fcs_fabric_uf_recv(fabric, fchs, len);
        bfa_uf_free(uf);
}

void
bfa_fcs_uf_attach(struct bfa_fcs_s *fcs)
{
        bfa_uf_recv_register(fcs->bfa, bfa_fcs_uf_recv, fcs);
}