/*
 * 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_ioc.h"
#include "bfi_ctreg.h"
#include "bfa_defs.h"
#include "bfa_defs_svc.h"

BFA_TRC_FILE(CNA, IOC);

/*
 * IOC local definitions
 */
#define BFA_IOC_TOV             3000    /* msecs */
#define BFA_IOC_HWSEM_TOV       500     /* msecs */
#define BFA_IOC_HB_TOV          500     /* msecs */
#define BFA_IOC_HWINIT_MAX      5
#define BFA_IOC_TOV_RECOVER      BFA_IOC_HB_TOV

#define bfa_ioc_timer_start(__ioc)                                      \
        bfa_timer_begin((__ioc)->timer_mod, &(__ioc)->ioc_timer,        \
                        bfa_ioc_timeout, (__ioc), BFA_IOC_TOV)
#define bfa_ioc_timer_stop(__ioc)   bfa_timer_stop(&(__ioc)->ioc_timer)

#define bfa_hb_timer_start(__ioc)                                       \
        bfa_timer_begin((__ioc)->timer_mod, &(__ioc)->hb_timer,         \
                        bfa_ioc_hb_check, (__ioc), BFA_IOC_HB_TOV)
#define bfa_hb_timer_stop(__ioc)        bfa_timer_stop(&(__ioc)->hb_timer)

#define BFA_DBG_FWTRC_OFF(_fn)  (BFI_IOC_TRC_OFF + BFA_DBG_FWTRC_LEN * (_fn))

/*
 * Asic specific macros : see bfa_hw_cb.c and bfa_hw_ct.c for details.
 */

#define bfa_ioc_firmware_lock(__ioc)                    \
                        ((__ioc)->ioc_hwif->ioc_firmware_lock(__ioc))
#define bfa_ioc_firmware_unlock(__ioc)                  \
                        ((__ioc)->ioc_hwif->ioc_firmware_unlock(__ioc))
#define bfa_ioc_reg_init(__ioc) ((__ioc)->ioc_hwif->ioc_reg_init(__ioc))
#define bfa_ioc_map_port(__ioc) ((__ioc)->ioc_hwif->ioc_map_port(__ioc))
#define bfa_ioc_notify_fail(__ioc)              \
                        ((__ioc)->ioc_hwif->ioc_notify_fail(__ioc))
#define bfa_ioc_sync_join(__ioc)                \
                        ((__ioc)->ioc_hwif->ioc_sync_join(__ioc))
#define bfa_ioc_sync_leave(__ioc)               \
                        ((__ioc)->ioc_hwif->ioc_sync_leave(__ioc))
#define bfa_ioc_sync_ack(__ioc)                 \
                        ((__ioc)->ioc_hwif->ioc_sync_ack(__ioc))
#define bfa_ioc_sync_complete(__ioc)            \
                        ((__ioc)->ioc_hwif->ioc_sync_complete(__ioc))

#define bfa_ioc_mbox_cmd_pending(__ioc)         \
                        (!list_empty(&((__ioc)->mbox_mod.cmd_q)) || \
                        readl((__ioc)->ioc_regs.hfn_mbox_cmd))

bfa_boolean_t bfa_auto_recover = BFA_TRUE;

/*
 * forward declarations
 */
static void bfa_ioc_hw_sem_get(struct bfa_ioc_s *ioc);
static void bfa_ioc_hwinit(struct bfa_ioc_s *ioc, bfa_boolean_t force);
static void bfa_ioc_timeout(void *ioc);
static void bfa_ioc_send_enable(struct bfa_ioc_s *ioc);
static void bfa_ioc_send_disable(struct bfa_ioc_s *ioc);
static void bfa_ioc_send_getattr(struct bfa_ioc_s *ioc);
static void bfa_ioc_hb_monitor(struct bfa_ioc_s *ioc);
static void bfa_ioc_mbox_poll(struct bfa_ioc_s *ioc);
static void bfa_ioc_mbox_hbfail(struct bfa_ioc_s *ioc);
static void bfa_ioc_recover(struct bfa_ioc_s *ioc);
static void bfa_ioc_check_attr_wwns(struct bfa_ioc_s *ioc);
static void bfa_ioc_disable_comp(struct bfa_ioc_s *ioc);
static void bfa_ioc_lpu_stop(struct bfa_ioc_s *ioc);
static void bfa_ioc_debug_save_ftrc(struct bfa_ioc_s *ioc);
static void bfa_ioc_fail_notify(struct bfa_ioc_s *ioc);
static void bfa_ioc_pf_fwmismatch(struct bfa_ioc_s *ioc);


/*
 * IOC state machine definitions/declarations
 */
enum ioc_event {
        IOC_E_RESET             = 1,    /*  IOC reset request           */
        IOC_E_ENABLE            = 2,    /*  IOC enable request          */
        IOC_E_DISABLE           = 3,    /*  IOC disable request */
        IOC_E_DETACH            = 4,    /*  driver detach cleanup       */
        IOC_E_ENABLED           = 5,    /*  f/w enabled         */
        IOC_E_FWRSP_GETATTR     = 6,    /*  IOC get attribute response  */
        IOC_E_DISABLED          = 7,    /*  f/w disabled                */
        IOC_E_INITFAILED        = 8,    /*  failure notice by iocpf sm  */
        IOC_E_PFFAILED          = 9,    /*  failure notice by iocpf sm  */
        IOC_E_HBFAIL            = 10,   /*  heartbeat failure           */
        IOC_E_HWERROR           = 11,   /*  hardware error interrupt    */
        IOC_E_TIMEOUT           = 12,   /*  timeout                     */
};

bfa_fsm_state_decl(bfa_ioc, uninit, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, reset, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, enabling, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, getattr, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, op, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, fail_retry, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, fail, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, disabling, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, disabled, struct bfa_ioc_s, enum ioc_event);

static struct bfa_sm_table_s ioc_sm_table[] = {
        {BFA_SM(bfa_ioc_sm_uninit), BFA_IOC_UNINIT},
        {BFA_SM(bfa_ioc_sm_reset), BFA_IOC_RESET},
        {BFA_SM(bfa_ioc_sm_enabling), BFA_IOC_ENABLING},
        {BFA_SM(bfa_ioc_sm_getattr), BFA_IOC_GETATTR},
        {BFA_SM(bfa_ioc_sm_op), BFA_IOC_OPERATIONAL},
        {BFA_SM(bfa_ioc_sm_fail_retry), BFA_IOC_INITFAIL},
        {BFA_SM(bfa_ioc_sm_fail), BFA_IOC_FAIL},
        {BFA_SM(bfa_ioc_sm_disabling), BFA_IOC_DISABLING},
        {BFA_SM(bfa_ioc_sm_disabled), BFA_IOC_DISABLED},
};

/*
 * IOCPF state machine definitions/declarations
 */

#define bfa_iocpf_timer_start(__ioc)                                    \
        bfa_timer_begin((__ioc)->timer_mod, &(__ioc)->ioc_timer,        \
                        bfa_iocpf_timeout, (__ioc), BFA_IOC_TOV)
#define bfa_iocpf_timer_stop(__ioc)     bfa_timer_stop(&(__ioc)->ioc_timer)

#define bfa_iocpf_recovery_timer_start(__ioc)                           \
        bfa_timer_begin((__ioc)->timer_mod, &(__ioc)->ioc_timer,        \
                        bfa_iocpf_timeout, (__ioc), BFA_IOC_TOV_RECOVER)

#define bfa_sem_timer_start(__ioc)                                      \
        bfa_timer_begin((__ioc)->timer_mod, &(__ioc)->sem_timer,        \
                        bfa_iocpf_sem_timeout, (__ioc), BFA_IOC_HWSEM_TOV)
#define bfa_sem_timer_stop(__ioc)       bfa_timer_stop(&(__ioc)->sem_timer)

/*
 * Forward declareations for iocpf state machine
 */
static void bfa_iocpf_timeout(void *ioc_arg);
static void bfa_iocpf_sem_timeout(void *ioc_arg);

/*
 * IOCPF state machine events
 */
enum iocpf_event {
        IOCPF_E_ENABLE          = 1,    /*  IOCPF enable request        */
        IOCPF_E_DISABLE         = 2,    /*  IOCPF disable request       */
        IOCPF_E_STOP            = 3,    /*  stop on driver detach       */
        IOCPF_E_FWREADY         = 4,    /*  f/w initialization done     */
        IOCPF_E_FWRSP_ENABLE    = 5,    /*  enable f/w response */
        IOCPF_E_FWRSP_DISABLE   = 6,    /*  disable f/w response        */
        IOCPF_E_FAIL            = 7,    /*  failure notice by ioc sm    */
        IOCPF_E_INITFAIL        = 8,    /*  init fail notice by ioc sm  */
        IOCPF_E_GETATTRFAIL     = 9,    /*  init fail notice by ioc sm  */
        IOCPF_E_SEMLOCKED       = 10,   /*  h/w semaphore is locked     */
        IOCPF_E_TIMEOUT         = 11,   /*  f/w response timeout        */
};

/*
 * IOCPF states
 */
enum bfa_iocpf_state {
        BFA_IOCPF_RESET         = 1,    /*  IOC is in reset state */
        BFA_IOCPF_SEMWAIT       = 2,    /*  Waiting for IOC h/w semaphore */
        BFA_IOCPF_HWINIT        = 3,    /*  IOC h/w is being initialized */
        BFA_IOCPF_READY         = 4,    /*  IOCPF is initialized */
        BFA_IOCPF_INITFAIL      = 5,    /*  IOCPF failed */
        BFA_IOCPF_FAIL          = 6,    /*  IOCPF failed */
        BFA_IOCPF_DISABLING     = 7,    /*  IOCPF is being disabled */
        BFA_IOCPF_DISABLED      = 8,    /*  IOCPF is disabled */
        BFA_IOCPF_FWMISMATCH    = 9,    /*  IOC f/w different from drivers */
};

bfa_fsm_state_decl(bfa_iocpf, reset, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, fwcheck, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, mismatch, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, semwait, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, hwinit, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, enabling, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, ready, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, initfail_sync, struct bfa_iocpf_s,
                                                enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, initfail, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, fail_sync, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, fail, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, disabling, struct bfa_iocpf_s, enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, disabling_sync, struct bfa_iocpf_s,
                                                enum iocpf_event);
bfa_fsm_state_decl(bfa_iocpf, disabled, struct bfa_iocpf_s, enum iocpf_event);

static struct bfa_sm_table_s iocpf_sm_table[] = {
        {BFA_SM(bfa_iocpf_sm_reset), BFA_IOCPF_RESET},
        {BFA_SM(bfa_iocpf_sm_fwcheck), BFA_IOCPF_FWMISMATCH},
        {BFA_SM(bfa_iocpf_sm_mismatch), BFA_IOCPF_FWMISMATCH},
        {BFA_SM(bfa_iocpf_sm_semwait), BFA_IOCPF_SEMWAIT},
        {BFA_SM(bfa_iocpf_sm_hwinit), BFA_IOCPF_HWINIT},
        {BFA_SM(bfa_iocpf_sm_enabling), BFA_IOCPF_HWINIT},
        {BFA_SM(bfa_iocpf_sm_ready), BFA_IOCPF_READY},
        {BFA_SM(bfa_iocpf_sm_initfail_sync), BFA_IOCPF_INITFAIL},
        {BFA_SM(bfa_iocpf_sm_initfail), BFA_IOCPF_INITFAIL},
        {BFA_SM(bfa_iocpf_sm_fail_sync), BFA_IOCPF_FAIL},
        {BFA_SM(bfa_iocpf_sm_fail), BFA_IOCPF_FAIL},
        {BFA_SM(bfa_iocpf_sm_disabling), BFA_IOCPF_DISABLING},
        {BFA_SM(bfa_iocpf_sm_disabling_sync), BFA_IOCPF_DISABLING},
        {BFA_SM(bfa_iocpf_sm_disabled), BFA_IOCPF_DISABLED},
};

/*
 * IOC State Machine
 */

/*
 * Beginning state. IOC uninit state.
 */

static void
bfa_ioc_sm_uninit_entry(struct bfa_ioc_s *ioc)
{
}

/*
 * IOC is in uninit state.
 */
static void
bfa_ioc_sm_uninit(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_RESET:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_reset);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}
/*
 * Reset entry actions -- initialize state machine
 */
static void
bfa_ioc_sm_reset_entry(struct bfa_ioc_s *ioc)
{
        bfa_fsm_set_state(&ioc->iocpf, bfa_iocpf_sm_reset);
}

/*
 * IOC is in reset state.
 */
static void
bfa_ioc_sm_reset(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_ENABLE:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_enabling);
                break;

        case IOC_E_DISABLE:
                bfa_ioc_disable_comp(ioc);
                break;

        case IOC_E_DETACH:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_enabling_entry(struct bfa_ioc_s *ioc)
{
        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_ENABLE);
}

/*
 * Host IOC function is being enabled, awaiting response from firmware.
 * Semaphore is acquired.
 */
static void
bfa_ioc_sm_enabling(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_ENABLED:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_getattr);
                break;

        case IOC_E_PFFAILED:
                /* !!! fall through !!! */
        case IOC_E_HWERROR:
                ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
                bfa_fsm_set_state(ioc, bfa_ioc_sm_fail_retry);
                if (event != IOC_E_PFFAILED)
                        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_INITFAIL);
                break;

        case IOC_E_DISABLE:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
                break;

        case IOC_E_DETACH:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_STOP);
                break;

        case IOC_E_ENABLE:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_getattr_entry(struct bfa_ioc_s *ioc)
{
        bfa_ioc_timer_start(ioc);
        bfa_ioc_send_getattr(ioc);
}

/*
 * IOC configuration in progress. Timer is active.
 */
static void
bfa_ioc_sm_getattr(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_FWRSP_GETATTR:
                bfa_ioc_timer_stop(ioc);
                bfa_ioc_check_attr_wwns(ioc);
                bfa_fsm_set_state(ioc, bfa_ioc_sm_op);
                break;

                break;
        case IOC_E_PFFAILED:
        case IOC_E_HWERROR:
                bfa_ioc_timer_stop(ioc);
                /* !!! fall through !!! */
        case IOC_E_TIMEOUT:
                ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
                bfa_fsm_set_state(ioc, bfa_ioc_sm_fail_retry);
                if (event != IOC_E_PFFAILED)
                        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_GETATTRFAIL);
                break;

        case IOC_E_DISABLE:
                bfa_ioc_timer_stop(ioc);
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
                break;

        case IOC_E_ENABLE:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_op_entry(struct bfa_ioc_s *ioc)
{
        struct bfad_s *bfad = (struct bfad_s *)ioc->bfa->bfad;

        ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_OK);
        bfa_ioc_hb_monitor(ioc);
        BFA_LOG(KERN_INFO, bfad, bfa_log_level, "IOC enabled\n");
}

static void
bfa_ioc_sm_op(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_ENABLE:
                break;

        case IOC_E_DISABLE:
                bfa_hb_timer_stop(ioc);
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
                break;

        case IOC_E_PFFAILED:
        case IOC_E_HWERROR:
                bfa_hb_timer_stop(ioc);
                /* !!! fall through !!! */
        case IOC_E_HBFAIL:
                bfa_ioc_fail_notify(ioc);

                if (ioc->iocpf.auto_recover)
                        bfa_fsm_set_state(ioc, bfa_ioc_sm_fail_retry);
                else
                        bfa_fsm_set_state(ioc, bfa_ioc_sm_fail);

                if (event != IOC_E_PFFAILED)
                        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_FAIL);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_disabling_entry(struct bfa_ioc_s *ioc)
{
        struct bfad_s *bfad = (struct bfad_s *)ioc->bfa->bfad;
        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_DISABLE);
        BFA_LOG(KERN_INFO, bfad, bfa_log_level, "IOC disabled\n");
}

/*
 * IOC is being disabled
 */
static void
bfa_ioc_sm_disabling(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_DISABLED:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
                break;

        case IOC_E_HWERROR:
                /*
                 * No state change.  Will move to disabled state
                 * after iocpf sm completes failure processing and
                 * moves to disabled state.
                 */
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_FAIL);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * IOC disable completion entry.
 */
static void
bfa_ioc_sm_disabled_entry(struct bfa_ioc_s *ioc)
{
        bfa_ioc_disable_comp(ioc);
}

static void
bfa_ioc_sm_disabled(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_ENABLE:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_enabling);
                break;

        case IOC_E_DISABLE:
                ioc->cbfn->disable_cbfn(ioc->bfa);
                break;

        case IOC_E_DETACH:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_STOP);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_fail_retry_entry(struct bfa_ioc_s *ioc)
{
        bfa_trc(ioc, 0);
}

/*
 * Hardware initialization retry.
 */
static void
bfa_ioc_sm_fail_retry(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {
        case IOC_E_ENABLED:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_getattr);
                break;

        case IOC_E_PFFAILED:
        case IOC_E_HWERROR:
                /*
                 * Initialization retry failed.
                 */
                ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
                if (event != IOC_E_PFFAILED)
                        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_INITFAIL);
                break;

        case IOC_E_INITFAILED:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_fail);
                break;

        case IOC_E_ENABLE:
                break;

        case IOC_E_DISABLE:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
                break;

        case IOC_E_DETACH:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_STOP);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}


static void
bfa_ioc_sm_fail_entry(struct bfa_ioc_s *ioc)
{
        bfa_trc(ioc, 0);
}

/*
 * IOC failure.
 */
static void
bfa_ioc_sm_fail(struct bfa_ioc_s *ioc, enum ioc_event event)
{
        bfa_trc(ioc, event);

        switch (event) {

        case IOC_E_ENABLE:
                ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
                break;

        case IOC_E_DISABLE:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
                break;

        case IOC_E_DETACH:
                bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_STOP);
                break;

        case IOC_E_HWERROR:
                /*
                 * HB failure notification, ignore.
                 */
                break;
        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * IOCPF State Machine
 */

/*
 * Reset entry actions -- initialize state machine
 */
static void
bfa_iocpf_sm_reset_entry(struct bfa_iocpf_s *iocpf)
{
        iocpf->retry_count = 0;
        iocpf->auto_recover = bfa_auto_recover;
}

/*
 * Beginning state. IOC is in reset state.
 */
static void
bfa_iocpf_sm_reset(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_ENABLE:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fwcheck);
                break;

        case IOCPF_E_STOP:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * Semaphore should be acquired for version check.
 */
static void
bfa_iocpf_sm_fwcheck_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_ioc_hw_sem_get(iocpf->ioc);
}

/*
 * Awaiting h/w semaphore to continue with version check.
 */
static void
bfa_iocpf_sm_fwcheck(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_SEMLOCKED:
                if (bfa_ioc_firmware_lock(ioc)) {
                        if (bfa_ioc_sync_complete(ioc)) {
                                iocpf->retry_count = 0;
                                bfa_ioc_sync_join(ioc);
                                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_hwinit);
                        } else {
                                bfa_ioc_firmware_unlock(ioc);
                                writel(1, ioc->ioc_regs.ioc_sem_reg);
                                bfa_sem_timer_start(ioc);
                        }
                } else {
                        writel(1, ioc->ioc_regs.ioc_sem_reg);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_mismatch);
                }
                break;

        case IOCPF_E_DISABLE:
                bfa_sem_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                bfa_fsm_send_event(ioc, IOC_E_DISABLED);
                break;

        case IOCPF_E_STOP:
                bfa_sem_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * Notify enable completion callback.
 */
static void
bfa_iocpf_sm_mismatch_entry(struct bfa_iocpf_s *iocpf)
{
        /*
         * Call only the first time sm enters fwmismatch state.
         */
        if (iocpf->retry_count == 0)
                bfa_ioc_pf_fwmismatch(iocpf->ioc);

        iocpf->retry_count++;
        bfa_iocpf_timer_start(iocpf->ioc);
}

/*
 * Awaiting firmware version match.
 */
static void
bfa_iocpf_sm_mismatch(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_TIMEOUT:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fwcheck);
                break;

        case IOCPF_E_DISABLE:
                bfa_iocpf_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                bfa_fsm_send_event(ioc, IOC_E_DISABLED);
                break;

        case IOCPF_E_STOP:
                bfa_iocpf_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * Request for semaphore.
 */
static void
bfa_iocpf_sm_semwait_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_ioc_hw_sem_get(iocpf->ioc);
}

/*
 * Awaiting semaphore for h/w initialzation.
 */
static void
bfa_iocpf_sm_semwait(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_SEMLOCKED:
                if (bfa_ioc_sync_complete(ioc)) {
                        bfa_ioc_sync_join(ioc);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_hwinit);
                } else {
                        writel(1, ioc->ioc_regs.ioc_sem_reg);
                        bfa_sem_timer_start(ioc);
                }
                break;

        case IOCPF_E_DISABLE:
                bfa_sem_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_hwinit_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_iocpf_timer_start(iocpf->ioc);
        bfa_ioc_hwinit(iocpf->ioc, BFA_FALSE);
}

/*
 * Hardware is being initialized. Interrupts are enabled.
 * Holding hardware semaphore lock.
 */
static void
bfa_iocpf_sm_hwinit(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_FWREADY:
                bfa_iocpf_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_enabling);
                break;

        case IOCPF_E_INITFAIL:
                bfa_iocpf_timer_stop(ioc);
                /*
                 * !!! fall through !!!
                 */

        case IOCPF_E_TIMEOUT:
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                if (event == IOCPF_E_TIMEOUT)
                        bfa_fsm_send_event(ioc, IOC_E_PFFAILED);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail_sync);
                break;

        case IOCPF_E_DISABLE:
                bfa_iocpf_timer_stop(ioc);
                bfa_ioc_sync_leave(ioc);
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabled);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_enabling_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_iocpf_timer_start(iocpf->ioc);
        bfa_ioc_send_enable(iocpf->ioc);
}

/*
 * Host IOC function is being enabled, awaiting response from firmware.
 * Semaphore is acquired.
 */
static void
bfa_iocpf_sm_enabling(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_FWRSP_ENABLE:
                bfa_iocpf_timer_stop(ioc);
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_ready);
                break;

        case IOCPF_E_INITFAIL:
                bfa_iocpf_timer_stop(ioc);
                /*
                 * !!! fall through !!!
                 */

        case IOCPF_E_TIMEOUT:
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                if (event == IOCPF_E_TIMEOUT)
                        bfa_fsm_send_event(ioc, IOC_E_PFFAILED);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail_sync);
                break;

        case IOCPF_E_DISABLE:
                bfa_iocpf_timer_stop(ioc);
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling);
                break;

        case IOCPF_E_FWREADY:
                bfa_ioc_send_enable(ioc);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_ready_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_fsm_send_event(iocpf->ioc, IOC_E_ENABLED);
}

static void
bfa_iocpf_sm_ready(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_DISABLE:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling);
                break;

        case IOCPF_E_GETATTRFAIL:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail_sync);
                break;

        case IOCPF_E_FAIL:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fail_sync);
                break;

        case IOCPF_E_FWREADY:
                if (bfa_ioc_is_operational(ioc)) {
                        bfa_fsm_send_event(ioc, IOC_E_PFFAILED);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fail_sync);
                } else {
                        bfa_fsm_send_event(ioc, IOC_E_PFFAILED);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail_sync);
                }
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_disabling_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_iocpf_timer_start(iocpf->ioc);
        bfa_ioc_send_disable(iocpf->ioc);
}

/*
 * IOC is being disabled
 */
static void
bfa_iocpf_sm_disabling(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_FWRSP_DISABLE:
        case IOCPF_E_FWREADY:
                bfa_iocpf_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
                break;

        case IOCPF_E_FAIL:
                bfa_iocpf_timer_stop(ioc);
                /*
                 * !!! fall through !!!
                 */

        case IOCPF_E_TIMEOUT:
                writel(BFI_IOC_FAIL, ioc->ioc_regs.ioc_fwstate);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
                break;

        case IOCPF_E_FWRSP_ENABLE:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_disabling_sync_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_ioc_hw_sem_get(iocpf->ioc);
}

/*
 * IOC hb ack request is being removed.
 */
static void
bfa_iocpf_sm_disabling_sync(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_SEMLOCKED:
                bfa_ioc_sync_leave(ioc);
                writel(1, ioc->ioc_regs.ioc_sem_reg);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabled);
                break;

        case IOCPF_E_FAIL:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 * IOC disable completion entry.
 */
static void
bfa_iocpf_sm_disabled_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_fsm_send_event(iocpf->ioc, IOC_E_DISABLED);
}

static void
bfa_iocpf_sm_disabled(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_ENABLE:
                iocpf->retry_count = 0;
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_semwait);
                break;

        case IOCPF_E_STOP:
                bfa_ioc_firmware_unlock(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_initfail_sync_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_ioc_hw_sem_get(iocpf->ioc);
}

/*
 * Hardware initialization failed.
 */
static void
bfa_iocpf_sm_initfail_sync(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_SEMLOCKED:
                bfa_ioc_notify_fail(ioc);
                bfa_ioc_sync_ack(ioc);
                iocpf->retry_count++;
                if (iocpf->retry_count >= BFA_IOC_HWINIT_MAX) {
                        bfa_ioc_sync_leave(ioc);
                        writel(1, ioc->ioc_regs.ioc_sem_reg);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_initfail);
                } else {
                        if (bfa_ioc_sync_complete(ioc))
                                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_hwinit);
                        else {
                                writel(1, ioc->ioc_regs.ioc_sem_reg);
                                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_semwait);
                        }
                }
                break;

        case IOCPF_E_DISABLE:
                bfa_sem_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
                break;

        case IOCPF_E_STOP:
                bfa_sem_timer_stop(ioc);
                bfa_ioc_firmware_unlock(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                break;

        case IOCPF_E_FAIL:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_initfail_entry(struct bfa_iocpf_s *iocpf)
{
        bfa_fsm_send_event(iocpf->ioc, IOC_E_INITFAILED);
}

/*
 * Hardware initialization failed.
 */
static void
bfa_iocpf_sm_initfail(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_DISABLE:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabled);
                break;

        case IOCPF_E_STOP:
                bfa_ioc_firmware_unlock(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_reset);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_fail_sync_entry(struct bfa_iocpf_s *iocpf)
{
        /*
         * Mark IOC as failed in hardware and stop firmware.
         */
        bfa_ioc_lpu_stop(iocpf->ioc);

        /*
         * Flush any queued up mailbox requests.
         */
        bfa_ioc_mbox_hbfail(iocpf->ioc);

        bfa_ioc_hw_sem_get(iocpf->ioc);
}

static void
bfa_iocpf_sm_fail_sync(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_SEMLOCKED:
                iocpf->retry_count = 0;
                bfa_ioc_sync_ack(ioc);
                bfa_ioc_notify_fail(ioc);
                if (!iocpf->auto_recover) {
                        bfa_ioc_sync_leave(ioc);
                        writel(1, ioc->ioc_regs.ioc_sem_reg);
                        bfa_fsm_set_state(iocpf, bfa_iocpf_sm_fail);
                } else {
                        if (bfa_ioc_sync_complete(ioc))
                                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_hwinit);
                        else {
                                writel(1, ioc->ioc_regs.ioc_sem_reg);
                                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_semwait);
                        }
                }
                break;

        case IOCPF_E_DISABLE:
                bfa_sem_timer_stop(ioc);
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabling_sync);
                break;

        case IOCPF_E_FAIL:
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

static void
bfa_iocpf_sm_fail_entry(struct bfa_iocpf_s *iocpf)
{
}

/*
 * IOC is in failed state.
 */
static void
bfa_iocpf_sm_fail(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
{
        struct bfa_ioc_s *ioc = iocpf->ioc;

        bfa_trc(ioc, event);

        switch (event) {
        case IOCPF_E_DISABLE:
                bfa_fsm_set_state(iocpf, bfa_iocpf_sm_disabled);
                break;

        default:
                bfa_sm_fault(ioc, event);
        }
}

/*
 *  BFA IOC private functions
 */

static void
bfa_ioc_disable_comp(struct bfa_ioc_s *ioc)
{
        struct list_head                        *qe;
        struct bfa_ioc_hbfail_notify_s  *notify;

        ioc->cbfn->disable_cbfn(ioc->bfa);

        /*
         * Notify common modules registered for notification.
         */
        list_for_each(qe, &ioc->hb_notify_q) {
                notify = (struct bfa_ioc_hbfail_notify_s *) qe;
                notify->cbfn(notify->cbarg);
        }
}

bfa_boolean_t
bfa_ioc_sem_get(void __iomem *sem_reg)
{
        u32 r32;
        int cnt = 0;
#define BFA_SEM_SPINCNT 3000

        r32 = readl(sem_reg);

        while (r32 && (cnt < BFA_SEM_SPINCNT)) {
                cnt++;
                udelay(2);
                r32 = readl(sem_reg);
        }

        if (r32 == 0)
                return BFA_TRUE;

        WARN_ON(cnt >= BFA_SEM_SPINCNT);
        return BFA_FALSE;
}

static void
bfa_ioc_hw_sem_get(struct bfa_ioc_s *ioc)
{
        u32     r32;

        /*
         * First read to the semaphore register will return 0, subsequent reads
         * will return 1. Semaphore is released by writing 1 to the register
         */
        r32 = readl(ioc->ioc_regs.ioc_sem_reg);
        if (r32 == 0) {
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_SEMLOCKED);
                return;
        }

        bfa_sem_timer_start(ioc);
}

/*
 * Initialize LPU local memory (aka secondary memory / SRAM)
 */
static void
bfa_ioc_lmem_init(struct bfa_ioc_s *ioc)
{
        u32     pss_ctl;
        int             i;
#define PSS_LMEM_INIT_TIME  10000

        pss_ctl = readl(ioc->ioc_regs.pss_ctl_reg);
        pss_ctl &= ~__PSS_LMEM_RESET;
        pss_ctl |= __PSS_LMEM_INIT_EN;

        /*
         * i2c workaround 12.5khz clock
         */
        pss_ctl |= __PSS_I2C_CLK_DIV(3UL);
        writel(pss_ctl, ioc->ioc_regs.pss_ctl_reg);

        /*
         * wait for memory initialization to be complete
         */
        i = 0;
        do {
                pss_ctl = readl(ioc->ioc_regs.pss_ctl_reg);
                i++;
        } while (!(pss_ctl & __PSS_LMEM_INIT_DONE) && (i < PSS_LMEM_INIT_TIME));

        /*
         * If memory initialization is not successful, IOC timeout will catch
         * such failures.
         */
        WARN_ON(!(pss_ctl & __PSS_LMEM_INIT_DONE));
        bfa_trc(ioc, pss_ctl);

        pss_ctl &= ~(__PSS_LMEM_INIT_DONE | __PSS_LMEM_INIT_EN);
        writel(pss_ctl, ioc->ioc_regs.pss_ctl_reg);
}

static void
bfa_ioc_lpu_start(struct bfa_ioc_s *ioc)
{
        u32     pss_ctl;

        /*
         * Take processor out of reset.
         */
        pss_ctl = readl(ioc->ioc_regs.pss_ctl_reg);
        pss_ctl &= ~__PSS_LPU0_RESET;

        writel(pss_ctl, ioc->ioc_regs.pss_ctl_reg);
}

static void
bfa_ioc_lpu_stop(struct bfa_ioc_s *ioc)
{
        u32     pss_ctl;

        /*
         * Put processors in reset.
         */
        pss_ctl = readl(ioc->ioc_regs.pss_ctl_reg);
        pss_ctl |= (__PSS_LPU0_RESET | __PSS_LPU1_RESET);

        writel(pss_ctl, ioc->ioc_regs.pss_ctl_reg);
}

/*
 * Get driver and firmware versions.
 */
void
bfa_ioc_fwver_get(struct bfa_ioc_s *ioc, struct bfi_ioc_image_hdr_s *fwhdr)
{
        u32     pgnum, pgoff;
        u32     loff = 0;
        int             i;
        u32     *fwsig = (u32 *) fwhdr;

        pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, loff);
        pgoff = PSS_SMEM_PGOFF(loff);
        writel(pgnum, ioc->ioc_regs.host_page_num_fn);

        for (i = 0; i < (sizeof(struct bfi_ioc_image_hdr_s) / sizeof(u32));
             i++) {
                fwsig[i] =
                        bfa_mem_read(ioc->ioc_regs.smem_page_start, loff);
                loff += sizeof(u32);
        }
}

/*
 * Returns TRUE if same.
 */
bfa_boolean_t
bfa_ioc_fwver_cmp(struct bfa_ioc_s *ioc, struct bfi_ioc_image_hdr_s *fwhdr)
{
        struct bfi_ioc_image_hdr_s *drv_fwhdr;
        int i;

        drv_fwhdr = (struct bfi_ioc_image_hdr_s *)
                bfa_cb_image_get_chunk(BFA_IOC_FWIMG_TYPE(ioc), 0);

        for (i = 0; i < BFI_IOC_MD5SUM_SZ; i++) {
                if (fwhdr->md5sum[i] != drv_fwhdr->md5sum[i]) {
                        bfa_trc(ioc, i);
                        bfa_trc(ioc, fwhdr->md5sum[i]);
                        bfa_trc(ioc, drv_fwhdr->md5sum[i]);
                        return BFA_FALSE;
                }
        }

        bfa_trc(ioc, fwhdr->md5sum[0]);
        return BFA_TRUE;
}

/*
 * Return true if current running version is valid. Firmware signature and
 * execution context (driver/bios) must match.
 */
static bfa_boolean_t
bfa_ioc_fwver_valid(struct bfa_ioc_s *ioc, u32 boot_env)
{
        struct bfi_ioc_image_hdr_s fwhdr, *drv_fwhdr;

        bfa_ioc_fwver_get(ioc, &fwhdr);
        drv_fwhdr = (struct bfi_ioc_image_hdr_s *)
                bfa_cb_image_get_chunk(BFA_IOC_FWIMG_TYPE(ioc), 0);

        if (fwhdr.signature != drv_fwhdr->signature) {
                bfa_trc(ioc, fwhdr.signature);
                bfa_trc(ioc, drv_fwhdr->signature);
                return BFA_FALSE;
        }

        if (swab32(fwhdr.param) != boot_env) {
                bfa_trc(ioc, fwhdr.param);
                bfa_trc(ioc, boot_env);
                return BFA_FALSE;
        }

        return bfa_ioc_fwver_cmp(ioc, &fwhdr);
}

/*
 * Conditionally flush any pending message from firmware at start.
 */
static void
bfa_ioc_msgflush(struct bfa_ioc_s *ioc)
{
        u32     r32;

        r32 = readl(ioc->ioc_regs.lpu_mbox_cmd);
        if (r32)
                writel(1, ioc->ioc_regs.lpu_mbox_cmd);
}

static void
bfa_ioc_hwinit(struct bfa_ioc_s *ioc, bfa_boolean_t force)
{
        enum bfi_ioc_state ioc_fwstate;
        bfa_boolean_t fwvalid;
        u32 boot_type;
        u32 boot_env;

        ioc_fwstate = readl(ioc->ioc_regs.ioc_fwstate);

        if (force)
                ioc_fwstate = BFI_IOC_UNINIT;

        bfa_trc(ioc, ioc_fwstate);

        boot_type = BFI_BOOT_TYPE_NORMAL;
        boot_env = BFI_BOOT_LOADER_OS;

        /*
         * check if firmware is valid
         */
        fwvalid = (ioc_fwstate == BFI_IOC_UNINIT) ?
                BFA_FALSE : bfa_ioc_fwver_valid(ioc, boot_env);

        if (!fwvalid) {
                bfa_ioc_boot(ioc, boot_type, boot_env);
                return;
        }

        /*
         * If hardware initialization is in progress (initialized by other IOC),
         * just wait for an initialization completion interrupt.
         */
        if (ioc_fwstate == BFI_IOC_INITING) {
                ioc->cbfn->reset_cbfn(ioc->bfa);
                return;
        }

        /*
         * If IOC function is disabled and firmware version is same,
         * just re-enable IOC.
         *
         * If option rom, IOC must not be in operational state. With
         * convergence, IOC will be in operational state when 2nd driver
         * is loaded.
         */
        if (ioc_fwstate == BFI_IOC_DISABLED || ioc_fwstate == BFI_IOC_OP) {

                /*
                 * When using MSI-X any pending firmware ready event should
                 * be flushed. Otherwise MSI-X interrupts are not delivered.
                 */
                bfa_ioc_msgflush(ioc);
                ioc->cbfn->reset_cbfn(ioc->bfa);
                bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_FWREADY);
                return;
        }

        /*
         * Initialize the h/w for any other states.
         */
        bfa_ioc_boot(ioc, boot_type, boot_env);
}

static void
bfa_ioc_timeout(void *ioc_arg)
{
        struct bfa_ioc_s  *ioc = (struct bfa_ioc_s *) ioc_arg;

        bfa_trc(ioc, 0);
        bfa_fsm_send_event(ioc, IOC_E_TIMEOUT);
}

void
bfa_ioc_mbox_send(struct bfa_ioc_s *ioc, void *ioc_msg, int len)
{
        u32 *msgp = (u32 *) ioc_msg;
        u32 i;

        bfa_trc(ioc, msgp[0]);
        bfa_trc(ioc, len);

        WARN_ON(len > BFI_IOC_MSGLEN_MAX);

        /*
         * first write msg to mailbox registers
         */
        for (i = 0; i < len / sizeof(u32); i++)
                writel(cpu_to_le32(msgp[i]),
                        ioc->ioc_regs.hfn_mbox + i * sizeof(u32));

        for (; i < BFI_IOC_MSGLEN_MAX / sizeof(u32); i++)
                writel(0, ioc->ioc_regs.hfn_mbox + i * sizeof(u32));

        /*
         * write 1 to mailbox CMD to trigger LPU event
         */
        writel(1, ioc->ioc_regs.hfn_mbox_cmd);
        (void) readl(ioc->ioc_regs.hfn_mbox_cmd);
}

static void
bfa_ioc_send_enable(struct bfa_ioc_s *ioc)
{
        struct bfi_ioc_ctrl_req_s enable_req;
        struct timeval tv;

        bfi_h2i_set(enable_req.mh, BFI_MC_IOC, BFI_IOC_H2I_ENABLE_REQ,
                    bfa_ioc_portid(ioc));
        enable_req.ioc_class = ioc->ioc_mc;
        do_gettimeofday(&tv);
        enable_req.tv_sec = be32_to_cpu(tv.tv_sec);
        bfa_ioc_mbox_send(ioc, &enable_req, sizeof(struct bfi_ioc_ctrl_req_s));
}

static void
bfa_ioc_send_disable(struct bfa_ioc_s *ioc)
{
        struct bfi_ioc_ctrl_req_s disable_req;

        bfi_h2i_set(disable_req.mh, BFI_MC_IOC, BFI_IOC_H2I_DISABLE_REQ,
                    bfa_ioc_portid(ioc));
        bfa_ioc_mbox_send(ioc, &disable_req, sizeof(struct bfi_ioc_ctrl_req_s));
}

static void
bfa_ioc_send_getattr(struct bfa_ioc_s *ioc)
{
        struct bfi_ioc_getattr_req_s    attr_req;

        bfi_h2i_set(attr_req.mh, BFI_MC_IOC, BFI_IOC_H2I_GETATTR_REQ,
                    bfa_ioc_portid(ioc));
        bfa_dma_be_addr_set(attr_req.attr_addr, ioc->attr_dma.pa);
        bfa_ioc_mbox_send(ioc, &attr_req, sizeof(attr_req));
}

static void
bfa_ioc_hb_check(void *cbarg)
{
        struct bfa_ioc_s  *ioc = cbarg;
        u32     hb_count;

        hb_count = readl(ioc->ioc_regs.heartbeat);
        if (ioc->hb_count == hb_count) {
                bfa_ioc_recover(ioc);
                return;
        } else {
                ioc->hb_count = hb_count;
        }

        bfa_ioc_mbox_poll(ioc);
        bfa_hb_timer_start(ioc);
}

static void
bfa_ioc_hb_monitor(struct bfa_ioc_s *ioc)
{
        ioc->hb_count = readl(ioc->ioc_regs.heartbeat);
        bfa_hb_timer_start(ioc);
}

/*
 *      Initiate a full firmware download.
 */
static void
bfa_ioc_download_fw(struct bfa_ioc_s *ioc, u32 boot_type,
                    u32 boot_env)
{
        u32 *fwimg;
        u32 pgnum, pgoff;
        u32 loff = 0;
        u32 chunkno = 0;
        u32 i;

        /*
         * Initialize LMEM first before code download
         */
        bfa_ioc_lmem_init(ioc);

        bfa_trc(ioc, bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)));
        fwimg = bfa_cb_image_get_chunk(BFA_IOC_FWIMG_TYPE(ioc), chunkno);

        pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, loff);
        pgoff = PSS_SMEM_PGOFF(loff);

        writel(pgnum, ioc->ioc_regs.host_page_num_fn);

        for (i = 0; i < bfa_cb_image_get_size(BFA_IOC_FWIMG_TYPE(ioc)); i++) {

                if (BFA_IOC_FLASH_CHUNK_NO(i) != chunkno) {
                        chunkno = BFA_IOC_FLASH_CHUNK_NO(i);
                        fwimg = bfa_cb_image_get_chunk(BFA_IOC_FWIMG_TYPE(ioc),
                                        BFA_IOC_FLASH_CHUNK_ADDR(chunkno));
                }

                /*
                 * write smem
                 */
                bfa_mem_write(ioc->ioc_regs.smem_page_start, loff,
                              fwimg[BFA_IOC_FLASH_OFFSET_IN_CHUNK(i)]);

                loff += sizeof(u32);

                /*
                 * handle page offset wrap around
                 */
                loff = PSS_SMEM_PGOFF(loff);
                if (loff == 0) {
                        pgnum++;
                        writel(pgnum, ioc->ioc_regs.host_page_num_fn);
                }
        }

        writel(PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, 0),
                        ioc->ioc_regs.host_page_num_fn);

        /*
         * Set boot type and boot param at the end.
        */
        bfa_mem_write(ioc->ioc_regs.smem_page_start, BFI_BOOT_TYPE_OFF,
                        swab32(boot_type));
        bfa_mem_write(ioc->ioc_regs.smem_page_start, BFI_BOOT_LOADER_OFF,
                        swab32(boot_env));
}


/*
 * Update BFA configuration from firmware configuration.
 */
static void
bfa_ioc_getattr_reply(struct bfa_ioc_s *ioc)
{
        struct bfi_ioc_attr_s   *attr = ioc->attr;

        attr->adapter_prop  = be32_to_cpu(attr->adapter_prop);
        attr->card_type     = be32_to_cpu(attr->card_type);
        attr->maxfrsize     = be16_to_cpu(attr->maxfrsize);

        bfa_fsm_send_event(ioc, IOC_E_FWRSP_GETATTR);
}

/*
 * Attach time initialization of mbox logic.
 */
static void
bfa_ioc_mbox_attach(struct bfa_ioc_s *ioc)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        int     mc;

        INIT_LIST_HEAD(&mod->cmd_q);
        for (mc = 0; mc < BFI_MC_MAX; mc++) {
                mod->mbhdlr[mc].cbfn = NULL;
                mod->mbhdlr[mc].cbarg = ioc->bfa;
        }
}

/*
 * Mbox poll timer -- restarts any pending mailbox requests.
 */
static void
bfa_ioc_mbox_poll(struct bfa_ioc_s *ioc)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        struct bfa_mbox_cmd_s           *cmd;
        u32                     stat;

        /*
         * If no command pending, do nothing
         */
        if (list_empty(&mod->cmd_q))
                return;

        /*
         * If previous command is not yet fetched by firmware, do nothing
         */
        stat = readl(ioc->ioc_regs.hfn_mbox_cmd);
        if (stat)
                return;

        /*
         * Enqueue command to firmware.
         */
        bfa_q_deq(&mod->cmd_q, &cmd);
        bfa_ioc_mbox_send(ioc, cmd->msg, sizeof(cmd->msg));
}

/*
 * Cleanup any pending requests.
 */
static void
bfa_ioc_mbox_hbfail(struct bfa_ioc_s *ioc)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        struct bfa_mbox_cmd_s           *cmd;

        while (!list_empty(&mod->cmd_q))
                bfa_q_deq(&mod->cmd_q, &cmd);
}

/*
 * Read data from SMEM to host through PCI memmap
 *
 * @param[in]   ioc     memory for IOC
 * @param[in]   tbuf    app memory to store data from smem
 * @param[in]   soff    smem offset
 * @param[in]   sz      size of smem in bytes
 */
static bfa_status_t
bfa_ioc_smem_read(struct bfa_ioc_s *ioc, void *tbuf, u32 soff, u32 sz)
{
        u32 pgnum, loff;
        __be32 r32;
        int i, len;
        u32 *buf = tbuf;

        pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, soff);
        loff = PSS_SMEM_PGOFF(soff);
        bfa_trc(ioc, pgnum);
        bfa_trc(ioc, loff);
        bfa_trc(ioc, sz);

        /*
         *  Hold semaphore to serialize pll init and fwtrc.
         */
        if (BFA_FALSE == bfa_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg)) {
                bfa_trc(ioc, 0);
                return BFA_STATUS_FAILED;
        }

        writel(pgnum, ioc->ioc_regs.host_page_num_fn);

        len = sz/sizeof(u32);
        bfa_trc(ioc, len);
        for (i = 0; i < len; i++) {
                r32 = bfa_mem_read(ioc->ioc_regs.smem_page_start, loff);
                buf[i] = be32_to_cpu(r32);
                loff += sizeof(u32);

                /*
                 * handle page offset wrap around
                 */
                loff = PSS_SMEM_PGOFF(loff);
                if (loff == 0) {
                        pgnum++;
                        writel(pgnum, ioc->ioc_regs.host_page_num_fn);
                }
        }
        writel(PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, 0),
                        ioc->ioc_regs.host_page_num_fn);
        /*
         *  release semaphore.
         */
        writel(1, ioc->ioc_regs.ioc_init_sem_reg);

        bfa_trc(ioc, pgnum);
        return BFA_STATUS_OK;
}

/*
 * Clear SMEM data from host through PCI memmap
 *
 * @param[in]   ioc     memory for IOC
 * @param[in]   soff    smem offset
 * @param[in]   sz      size of smem in bytes
 */
static bfa_status_t
bfa_ioc_smem_clr(struct bfa_ioc_s *ioc, u32 soff, u32 sz)
{
        int i, len;
        u32 pgnum, loff;

        pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, soff);
        loff = PSS_SMEM_PGOFF(soff);
        bfa_trc(ioc, pgnum);
        bfa_trc(ioc, loff);
        bfa_trc(ioc, sz);

        /*
         *  Hold semaphore to serialize pll init and fwtrc.
         */
        if (BFA_FALSE == bfa_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg)) {
                bfa_trc(ioc, 0);
                return BFA_STATUS_FAILED;
        }

        writel(pgnum, ioc->ioc_regs.host_page_num_fn);

        len = sz/sizeof(u32); /* len in words */
        bfa_trc(ioc, len);
        for (i = 0; i < len; i++) {
                bfa_mem_write(ioc->ioc_regs.smem_page_start, loff, 0);
                loff += sizeof(u32);

                /*
                 * handle page offset wrap around
                 */
                loff = PSS_SMEM_PGOFF(loff);
                if (loff == 0) {
                        pgnum++;
                        writel(pgnum, ioc->ioc_regs.host_page_num_fn);
                }
        }
        writel(PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, 0),
                        ioc->ioc_regs.host_page_num_fn);

        /*
         *  release semaphore.
         */
        writel(1, ioc->ioc_regs.ioc_init_sem_reg);
        bfa_trc(ioc, pgnum);
        return BFA_STATUS_OK;
}

static void
bfa_ioc_fail_notify(struct bfa_ioc_s *ioc)
{
        struct list_head                *qe;
        struct bfa_ioc_hbfail_notify_s  *notify;
        struct bfad_s *bfad = (struct bfad_s *)ioc->bfa->bfad;

        /*
         * Notify driver and common modules registered for notification.
         */
        ioc->cbfn->hbfail_cbfn(ioc->bfa);
        list_for_each(qe, &ioc->hb_notify_q) {
                notify = (struct bfa_ioc_hbfail_notify_s *) qe;
                notify->cbfn(notify->cbarg);
        }

        bfa_ioc_debug_save_ftrc(ioc);

        BFA_LOG(KERN_CRIT, bfad, bfa_log_level,
                "Heart Beat of IOC has failed\n");

}

static void
bfa_ioc_pf_fwmismatch(struct bfa_ioc_s *ioc)
{
        struct bfad_s *bfad = (struct bfad_s *)ioc->bfa->bfad;
        /*
         * Provide enable completion callback.
         */
        ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
        BFA_LOG(KERN_WARNING, bfad, bfa_log_level,
                "Running firmware version is incompatible "
                "with the driver version\n");
}

bfa_status_t
bfa_ioc_pll_init(struct bfa_ioc_s *ioc)
{

        /*
         *  Hold semaphore so that nobody can access the chip during init.
         */
        bfa_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg);

        bfa_ioc_pll_init_asic(ioc);

        ioc->pllinit = BFA_TRUE;
        /*
         *  release semaphore.
         */
        writel(1, ioc->ioc_regs.ioc_init_sem_reg);

        return BFA_STATUS_OK;
}

/*
 * Interface used by diag module to do firmware boot with memory test
 * as the entry vector.
 */
void
bfa_ioc_boot(struct bfa_ioc_s *ioc, u32 boot_type, u32 boot_env)
{
        void __iomem *rb;

        bfa_ioc_stats(ioc, ioc_boots);

        if (bfa_ioc_pll_init(ioc) != BFA_STATUS_OK)
                return;

        /*
         * Initialize IOC state of all functions on a chip reset.
         */
        rb = ioc->pcidev.pci_bar_kva;
        if (boot_type == BFI_BOOT_TYPE_MEMTEST) {
                writel(BFI_IOC_MEMTEST, (rb + BFA_IOC0_STATE_REG));
                writel(BFI_IOC_MEMTEST, (rb + BFA_IOC1_STATE_REG));
        } else {
                writel(BFI_IOC_INITING, (rb + BFA_IOC0_STATE_REG));
                writel(BFI_IOC_INITING, (rb + BFA_IOC1_STATE_REG));
        }

        bfa_ioc_msgflush(ioc);
        bfa_ioc_download_fw(ioc, boot_type, boot_env);

        /*
         * Enable interrupts just before starting LPU
         */
        ioc->cbfn->reset_cbfn(ioc->bfa);
        bfa_ioc_lpu_start(ioc);
}

/*
 * Enable/disable IOC failure auto recovery.
 */
void
bfa_ioc_auto_recover(bfa_boolean_t auto_recover)
{
        bfa_auto_recover = auto_recover;
}



bfa_boolean_t
bfa_ioc_is_operational(struct bfa_ioc_s *ioc)
{
        return bfa_fsm_cmp_state(ioc, bfa_ioc_sm_op);
}

bfa_boolean_t
bfa_ioc_is_initialized(struct bfa_ioc_s *ioc)
{
        u32 r32 = readl(ioc->ioc_regs.ioc_fwstate);

        return ((r32 != BFI_IOC_UNINIT) &&
                (r32 != BFI_IOC_INITING) &&
                (r32 != BFI_IOC_MEMTEST));
}

void
bfa_ioc_msgget(struct bfa_ioc_s *ioc, void *mbmsg)
{
        __be32  *msgp = mbmsg;
        u32     r32;
        int             i;

        /*
         * read the MBOX msg
         */
        for (i = 0; i < (sizeof(union bfi_ioc_i2h_msg_u) / sizeof(u32));
             i++) {
                r32 = readl(ioc->ioc_regs.lpu_mbox +
                                   i * sizeof(u32));
                msgp[i] = cpu_to_be32(r32);
        }

        /*
         * turn off mailbox interrupt by clearing mailbox status
         */
        writel(1, ioc->ioc_regs.lpu_mbox_cmd);
        readl(ioc->ioc_regs.lpu_mbox_cmd);
}

void
bfa_ioc_isr(struct bfa_ioc_s *ioc, struct bfi_mbmsg_s *m)
{
        union bfi_ioc_i2h_msg_u *msg;
        struct bfa_iocpf_s *iocpf = &ioc->iocpf;

        msg = (union bfi_ioc_i2h_msg_u *) m;

        bfa_ioc_stats(ioc, ioc_isrs);

        switch (msg->mh.msg_id) {
        case BFI_IOC_I2H_HBEAT:
                break;

        case BFI_IOC_I2H_READY_EVENT:
                bfa_fsm_send_event(iocpf, IOCPF_E_FWREADY);
                break;

        case BFI_IOC_I2H_ENABLE_REPLY:
                bfa_fsm_send_event(iocpf, IOCPF_E_FWRSP_ENABLE);
                break;

        case BFI_IOC_I2H_DISABLE_REPLY:
                bfa_fsm_send_event(iocpf, IOCPF_E_FWRSP_DISABLE);
                break;

        case BFI_IOC_I2H_GETATTR_REPLY:
                bfa_ioc_getattr_reply(ioc);
                break;

        default:
                bfa_trc(ioc, msg->mh.msg_id);
                WARN_ON(1);
        }
}

/*
 * IOC attach time initialization and setup.
 *
 * @param[in]   ioc     memory for IOC
 * @param[in]   bfa     driver instance structure
 */
void
bfa_ioc_attach(struct bfa_ioc_s *ioc, void *bfa, struct bfa_ioc_cbfn_s *cbfn,

               struct bfa_timer_mod_s *timer_mod)
{
        ioc->bfa        = bfa;
        ioc->cbfn       = cbfn;
        ioc->timer_mod  = timer_mod;
        ioc->fcmode     = BFA_FALSE;
        ioc->pllinit    = BFA_FALSE;
        ioc->dbg_fwsave_once = BFA_TRUE;
        ioc->iocpf.ioc  = ioc;

        bfa_ioc_mbox_attach(ioc);
        INIT_LIST_HEAD(&ioc->hb_notify_q);

        bfa_fsm_set_state(ioc, bfa_ioc_sm_uninit);
        bfa_fsm_send_event(ioc, IOC_E_RESET);
}

/*
 * Driver detach time IOC cleanup.
 */
void
bfa_ioc_detach(struct bfa_ioc_s *ioc)
{
        bfa_fsm_send_event(ioc, IOC_E_DETACH);
}

/*
 * Setup IOC PCI properties.
 *
 * @param[in]   pcidev  PCI device information for this IOC
 */
void
bfa_ioc_pci_init(struct bfa_ioc_s *ioc, struct bfa_pcidev_s *pcidev,
                 enum bfi_mclass mc)
{
        ioc->ioc_mc     = mc;
        ioc->pcidev     = *pcidev;
        ioc->ctdev      = bfa_asic_id_ct(ioc->pcidev.device_id);
        ioc->cna        = ioc->ctdev && !ioc->fcmode;

        /*
         * Set asic specific interfaces. See bfa_ioc_cb.c and bfa_ioc_ct.c
         */
        if (ioc->ctdev)
                bfa_ioc_set_ct_hwif(ioc);
        else
                bfa_ioc_set_cb_hwif(ioc);

        bfa_ioc_map_port(ioc);
        bfa_ioc_reg_init(ioc);
}

/*
 * Initialize IOC dma memory
 *
 * @param[in]   dm_kva  kernel virtual address of IOC dma memory
 * @param[in]   dm_pa   physical address of IOC dma memory
 */
void
bfa_ioc_mem_claim(struct bfa_ioc_s *ioc,  u8 *dm_kva, u64 dm_pa)
{
        /*
         * dma memory for firmware attribute
         */
        ioc->attr_dma.kva = dm_kva;
        ioc->attr_dma.pa = dm_pa;
        ioc->attr = (struct bfi_ioc_attr_s *) dm_kva;
}

void
bfa_ioc_enable(struct bfa_ioc_s *ioc)
{
        bfa_ioc_stats(ioc, ioc_enables);
        ioc->dbg_fwsave_once = BFA_TRUE;

        bfa_fsm_send_event(ioc, IOC_E_ENABLE);
}

void
bfa_ioc_disable(struct bfa_ioc_s *ioc)
{
        bfa_ioc_stats(ioc, ioc_disables);
        bfa_fsm_send_event(ioc, IOC_E_DISABLE);
}


/*
 * Initialize memory for saving firmware trace. Driver must initialize
 * trace memory before call bfa_ioc_enable().
 */
void
bfa_ioc_debug_memclaim(struct bfa_ioc_s *ioc, void *dbg_fwsave)
{
        ioc->dbg_fwsave     = dbg_fwsave;
        ioc->dbg_fwsave_len = (ioc->iocpf.auto_recover) ? BFA_DBG_FWTRC_LEN : 0;
}

/*
 * Register mailbox message handler functions
 *
 * @param[in]   ioc             IOC instance
 * @param[in]   mcfuncs         message class handler functions
 */
void
bfa_ioc_mbox_register(struct bfa_ioc_s *ioc, bfa_ioc_mbox_mcfunc_t *mcfuncs)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        int                             mc;

        for (mc = 0; mc < BFI_MC_MAX; mc++)
                mod->mbhdlr[mc].cbfn = mcfuncs[mc];
}

/*
 * Register mailbox message handler function, to be called by common modules
 */
void
bfa_ioc_mbox_regisr(struct bfa_ioc_s *ioc, enum bfi_mclass mc,
                    bfa_ioc_mbox_mcfunc_t cbfn, void *cbarg)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;

        mod->mbhdlr[mc].cbfn    = cbfn;
        mod->mbhdlr[mc].cbarg   = cbarg;
}

/*
 * Queue a mailbox command request to firmware. Waits if mailbox is busy.
 * Responsibility of caller to serialize
 *
 * @param[in]   ioc     IOC instance
 * @param[i]    cmd     Mailbox command
 */
void
bfa_ioc_mbox_queue(struct bfa_ioc_s *ioc, struct bfa_mbox_cmd_s *cmd)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        u32                     stat;

        /*
         * If a previous command is pending, queue new command
         */
        if (!list_empty(&mod->cmd_q)) {
                list_add_tail(&cmd->qe, &mod->cmd_q);
                return;
        }

        /*
         * If mailbox is busy, queue command for poll timer
         */
        stat = readl(ioc->ioc_regs.hfn_mbox_cmd);
        if (stat) {
                list_add_tail(&cmd->qe, &mod->cmd_q);
                return;
        }

        /*
         * mailbox is free -- queue command to firmware
         */
        bfa_ioc_mbox_send(ioc, cmd->msg, sizeof(cmd->msg));
}

/*
 * Handle mailbox interrupts
 */
void
bfa_ioc_mbox_isr(struct bfa_ioc_s *ioc)
{
        struct bfa_ioc_mbox_mod_s       *mod = &ioc->mbox_mod;
        struct bfi_mbmsg_s              m;
        int                             mc;

        bfa_ioc_msgget(ioc, &m);

        /*
         * Treat IOC message class as special.
         */
        mc = m.mh.msg_class;
        if (mc == BFI_MC_IOC) {
                bfa_ioc_isr(ioc, &m);
                return;
        }

        if ((mc > BFI_MC_MAX) || (mod->mbhdlr[mc].cbfn == NULL))
                return;

        mod->mbhdlr[mc].cbfn(mod->mbhdlr[mc].cbarg, &m);
}

void
bfa_ioc_error_isr(struct bfa_ioc_s *ioc)
{
        bfa_fsm_send_event(ioc, IOC_E_HWERROR);
}

void
bfa_ioc_set_fcmode(struct bfa_ioc_s *ioc)
{
        ioc->fcmode  = BFA_TRUE;
        ioc->port_id = bfa_ioc_pcifn(ioc);
}

/*
 * return true if IOC is disabled
 */
bfa_boolean_t
bfa_ioc_is_disabled(struct bfa_ioc_s *ioc)
{
        return bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabling) ||
                bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabled);
}

/*
 * return true if IOC firmware is different.
 */
bfa_boolean_t
bfa_ioc_fw_mismatch(struct bfa_ioc_s *ioc)
{
        return bfa_fsm_cmp_state(ioc, bfa_ioc_sm_reset) ||
                bfa_fsm_cmp_state(&ioc->iocpf, bfa_iocpf_sm_fwcheck) ||
                bfa_fsm_cmp_state(&ioc->iocpf, bfa_iocpf_sm_mismatch);
}

#define bfa_ioc_state_disabled(__sm)            \
        (((__sm) == BFI_IOC_UNINIT) ||          \
         ((__sm) == BFI_IOC_INITING) ||         \
         ((__sm) == BFI_IOC_HWINIT) ||          \
         ((__sm) == BFI_IOC_DISABLED) ||        \
         ((__sm) == BFI_IOC_FAIL) ||            \
         ((__sm) == BFI_IOC_CFG_DISABLED))

/*
 * Check if adapter is disabled -- both IOCs should be in a disabled
 * state.
 */
bfa_boolean_t
bfa_ioc_adapter_is_disabled(struct bfa_ioc_s *ioc)
{
        u32     ioc_state;
        void __iomem *rb = ioc->pcidev.pci_bar_kva;

        if (!bfa_fsm_cmp_state(ioc, bfa_ioc_sm_disabled))
                return BFA_FALSE;

        ioc_state = readl(rb + BFA_IOC0_STATE_REG);
        if (!bfa_ioc_state_disabled(ioc_state))
                return BFA_FALSE;

        if (ioc->pcidev.device_id != BFA_PCI_DEVICE_ID_FC_8G1P) {
                ioc_state = readl(rb + BFA_IOC1_STATE_REG);
                if (!bfa_ioc_state_disabled(ioc_state))
                        return BFA_FALSE;
        }

        return BFA_TRUE;
}

/*
 * Reset IOC fwstate registers.
 */
void
bfa_ioc_reset_fwstate(struct bfa_ioc_s *ioc)
{
        writel(BFI_IOC_UNINIT, ioc->ioc_regs.ioc_fwstate);
        writel(BFI_IOC_UNINIT, ioc->ioc_regs.alt_ioc_fwstate);
}

#define BFA_MFG_NAME "Brocade"
void
bfa_ioc_get_adapter_attr(struct bfa_ioc_s *ioc,
                         struct bfa_adapter_attr_s *ad_attr)
{
        struct bfi_ioc_attr_s   *ioc_attr;

        ioc_attr = ioc->attr;

        bfa_ioc_get_adapter_serial_num(ioc, ad_attr->serial_num);
        bfa_ioc_get_adapter_fw_ver(ioc, ad_attr->fw_ver);
        bfa_ioc_get_adapter_optrom_ver(ioc, ad_attr->optrom_ver);
        bfa_ioc_get_adapter_manufacturer(ioc, ad_attr->manufacturer);
        memcpy(&ad_attr->vpd, &ioc_attr->vpd,
                      sizeof(struct bfa_mfg_vpd_s));

        ad_attr->nports = bfa_ioc_get_nports(ioc);
        ad_attr->max_speed = bfa_ioc_speed_sup(ioc);

        bfa_ioc_get_adapter_model(ioc, ad_attr->model);
        /* For now, model descr uses same model string */
        bfa_ioc_get_adapter_model(ioc, ad_attr->model_descr);

        ad_attr->card_type = ioc_attr->card_type;
        ad_attr->is_mezz = bfa_mfg_is_mezz(ioc_attr->card_type);

        if (BFI_ADAPTER_IS_SPECIAL(ioc_attr->adapter_prop))
                ad_attr->prototype = 1;
        else
                ad_attr->prototype = 0;

        ad_attr->pwwn = ioc->attr->pwwn;
        ad_attr->mac  = bfa_ioc_get_mac(ioc);

        ad_attr->pcie_gen = ioc_attr->pcie_gen;
        ad_attr->pcie_lanes = ioc_attr->pcie_lanes;
        ad_attr->pcie_lanes_orig = ioc_attr->pcie_lanes_orig;
        ad_attr->asic_rev = ioc_attr->asic_rev;

        bfa_ioc_get_pci_chip_rev(ioc, ad_attr->hw_ver);

        ad_attr->cna_capable = ioc->cna;
        ad_attr->trunk_capable = (ad_attr->nports > 1) && !ioc->cna &&
                                !ad_attr->is_mezz;
}

enum bfa_ioc_type_e
bfa_ioc_get_type(struct bfa_ioc_s *ioc)
{
        if (!ioc->ctdev || ioc->fcmode)
                return BFA_IOC_TYPE_FC;
        else if (ioc->ioc_mc == BFI_MC_IOCFC)
                return BFA_IOC_TYPE_FCoE;
        else if (ioc->ioc_mc == BFI_MC_LL)
                return BFA_IOC_TYPE_LL;
        else {
                WARN_ON(ioc->ioc_mc != BFI_MC_LL);
                return BFA_IOC_TYPE_LL;
        }
}

void
bfa_ioc_get_adapter_serial_num(struct bfa_ioc_s *ioc, char *serial_num)
{
        memset((void *)serial_num, 0, BFA_ADAPTER_SERIAL_NUM_LEN);
        memcpy((void *)serial_num,
                        (void *)ioc->attr->brcd_serialnum,
                        BFA_ADAPTER_SERIAL_NUM_LEN);
}

void
bfa_ioc_get_adapter_fw_ver(struct bfa_ioc_s *ioc, char *fw_ver)
{
        memset((void *)fw_ver, 0, BFA_VERSION_LEN);
        memcpy(fw_ver, ioc->attr->fw_version, BFA_VERSION_LEN);
}

void
bfa_ioc_get_pci_chip_rev(struct bfa_ioc_s *ioc, char *chip_rev)
{
        WARN_ON(!chip_rev);

        memset((void *)chip_rev, 0, BFA_IOC_CHIP_REV_LEN);

        chip_rev[0] = 'R';
        chip_rev[1] = 'e';
        chip_rev[2] = 'v';
        chip_rev[3] = '-';
        chip_rev[4] = ioc->attr->asic_rev;
        chip_rev[5] = '\0';
}

void
bfa_ioc_get_adapter_optrom_ver(struct bfa_ioc_s *ioc, char *optrom_ver)
{
        memset((void *)optrom_ver, 0, BFA_VERSION_LEN);
        memcpy(optrom_ver, ioc->attr->optrom_version,
                      BFA_VERSION_LEN);
}

void
bfa_ioc_get_adapter_manufacturer(struct bfa_ioc_s *ioc, char *manufacturer)
{
        memset((void *)manufacturer, 0, BFA_ADAPTER_MFG_NAME_LEN);
        memcpy(manufacturer, BFA_MFG_NAME, BFA_ADAPTER_MFG_NAME_LEN);
}

void
bfa_ioc_get_adapter_model(struct bfa_ioc_s *ioc, char *model)
{
        struct bfi_ioc_attr_s   *ioc_attr;

        WARN_ON(!model);
        memset((void *)model, 0, BFA_ADAPTER_MODEL_NAME_LEN);

        ioc_attr = ioc->attr;

        /*
         * model name
         */
        snprintf(model, BFA_ADAPTER_MODEL_NAME_LEN, "%s-%u",
                BFA_MFG_NAME, ioc_attr->card_type);
}

enum bfa_ioc_state
bfa_ioc_get_state(struct bfa_ioc_s *ioc)
{
        enum bfa_iocpf_state iocpf_st;
        enum bfa_ioc_state ioc_st = bfa_sm_to_state(ioc_sm_table, ioc->fsm);

        if (ioc_st == BFA_IOC_ENABLING ||
                ioc_st == BFA_IOC_FAIL || ioc_st == BFA_IOC_INITFAIL) {

                iocpf_st = bfa_sm_to_state(iocpf_sm_table, ioc->iocpf.fsm);

                switch (iocpf_st) {
                case BFA_IOCPF_SEMWAIT:
                        ioc_st = BFA_IOC_SEMWAIT;
                        break;

                case BFA_IOCPF_HWINIT:
                        ioc_st = BFA_IOC_HWINIT;
                        break;

                case BFA_IOCPF_FWMISMATCH:
                        ioc_st = BFA_IOC_FWMISMATCH;
                        break;

                case BFA_IOCPF_FAIL:
                        ioc_st = BFA_IOC_FAIL;
                        break;

                case BFA_IOCPF_INITFAIL:
                        ioc_st = BFA_IOC_INITFAIL;
                        break;

                default:
                        break;
                }
        }

        return ioc_st;
}

void
bfa_ioc_get_attr(struct bfa_ioc_s *ioc, struct bfa_ioc_attr_s *ioc_attr)
{
        memset((void *)ioc_attr, 0, sizeof(struct bfa_ioc_attr_s));

        ioc_attr->state = bfa_ioc_get_state(ioc);
        ioc_attr->port_id = ioc->port_id;

        ioc_attr->ioc_type = bfa_ioc_get_type(ioc);

        bfa_ioc_get_adapter_attr(ioc, &ioc_attr->adapter_attr);

        ioc_attr->pci_attr.device_id = ioc->pcidev.device_id;
        ioc_attr->pci_attr.pcifn = ioc->pcidev.pci_func;
        bfa_ioc_get_pci_chip_rev(ioc, ioc_attr->pci_attr.chip_rev);
}

mac_t
bfa_ioc_get_mac(struct bfa_ioc_s *ioc)
{
        /*
         * Check the IOC type and return the appropriate MAC
         */
        if (bfa_ioc_get_type(ioc) == BFA_IOC_TYPE_FCoE)
                return ioc->attr->fcoe_mac;
        else
                return ioc->attr->mac;
}

mac_t
bfa_ioc_get_mfg_mac(struct bfa_ioc_s *ioc)
{
        mac_t   m;

        m = ioc->attr->mfg_mac;
        if (bfa_mfg_is_old_wwn_mac_model(ioc->attr->card_type))
                m.mac[MAC_ADDRLEN - 1] += bfa_ioc_pcifn(ioc);
        else
                bfa_mfg_increment_wwn_mac(&(m.mac[MAC_ADDRLEN-3]),
                        bfa_ioc_pcifn(ioc));

        return m;
}

bfa_boolean_t
bfa_ioc_get_fcmode(struct bfa_ioc_s *ioc)
{
        return ioc->fcmode || !bfa_asic_id_ct(ioc->pcidev.device_id);
}

/*
 * Retrieve saved firmware trace from a prior IOC failure.
 */
bfa_status_t
bfa_ioc_debug_fwsave(struct bfa_ioc_s *ioc, void *trcdata, int *trclen)
{
        int     tlen;

        if (ioc->dbg_fwsave_len == 0)
                return BFA_STATUS_ENOFSAVE;

        tlen = *trclen;
        if (tlen > ioc->dbg_fwsave_len)
                tlen = ioc->dbg_fwsave_len;

        memcpy(trcdata, ioc->dbg_fwsave, tlen);
        *trclen = tlen;
        return BFA_STATUS_OK;
}


/*
 * Retrieve saved firmware trace from a prior IOC failure.
 */
bfa_status_t
bfa_ioc_debug_fwtrc(struct bfa_ioc_s *ioc, void *trcdata, int *trclen)
{
        u32 loff = BFA_DBG_FWTRC_OFF(bfa_ioc_portid(ioc));
        int tlen;
        bfa_status_t status;

        bfa_trc(ioc, *trclen);

        tlen = *trclen;
        if (tlen > BFA_DBG_FWTRC_LEN)
                tlen = BFA_DBG_FWTRC_LEN;

        status = bfa_ioc_smem_read(ioc, trcdata, loff, tlen);
        *trclen = tlen;
        return status;
}

static void
bfa_ioc_send_fwsync(struct bfa_ioc_s *ioc)
{
        struct bfa_mbox_cmd_s cmd;
        struct bfi_ioc_ctrl_req_s *req = (struct bfi_ioc_ctrl_req_s *) cmd.msg;

        bfi_h2i_set(req->mh, BFI_MC_IOC, BFI_IOC_H2I_DBG_SYNC,
                    bfa_ioc_portid(ioc));
        req->ioc_class = ioc->ioc_mc;
        bfa_ioc_mbox_queue(ioc, &cmd);
}

static void
bfa_ioc_fwsync(struct bfa_ioc_s *ioc)
{
        u32 fwsync_iter = 1000;

        bfa_ioc_send_fwsync(ioc);

        /*
         * After sending a fw sync mbox command wait for it to
         * take effect.  We will not wait for a response because
         *    1. fw_sync mbox cmd doesn't have a response.
         *    2. Even if we implement that,  interrupts might not
         *       be enabled when we call this function.
         * So, just keep checking if any mbox cmd is pending, and
         * after waiting for a reasonable amount of time, go ahead.
         * It is possible that fw has crashed and the mbox command
         * is never acknowledged.
         */
        while (bfa_ioc_mbox_cmd_pending(ioc) && fwsync_iter > 0)
                fwsync_iter--;
}

/*
 * Dump firmware smem
 */
bfa_status_t
bfa_ioc_debug_fwcore(struct bfa_ioc_s *ioc, void *buf,
                                u32 *offset, int *buflen)
{
        u32 loff;
        int dlen;
        bfa_status_t status;
        u32 smem_len = BFA_IOC_FW_SMEM_SIZE(ioc);

        if (*offset >= smem_len) {
                *offset = *buflen = 0;
                return BFA_STATUS_EINVAL;
        }

        loff = *offset;
        dlen = *buflen;

        /*
         * First smem read, sync smem before proceeding
         * No need to sync before reading every chunk.
         */
        if (loff == 0)
                bfa_ioc_fwsync(ioc);

        if ((loff + dlen) >= smem_len)
                dlen = smem_len - loff;

        status = bfa_ioc_smem_read(ioc, buf, loff, dlen);

        if (status != BFA_STATUS_OK) {
                *offset = *buflen = 0;
                return status;
        }

        *offset += dlen;

        if (*offset >= smem_len)
                *offset = 0;

        *buflen = dlen;

        return status;
}

/*
 * Firmware statistics
 */
bfa_status_t
bfa_ioc_fw_stats_get(struct bfa_ioc_s *ioc, void *stats)
{
        u32 loff = BFI_IOC_FWSTATS_OFF + \
                BFI_IOC_FWSTATS_SZ * (bfa_ioc_portid(ioc));
        int tlen;
        bfa_status_t status;

        if (ioc->stats_busy) {
                bfa_trc(ioc, ioc->stats_busy);
                return BFA_STATUS_DEVBUSY;
        }
        ioc->stats_busy = BFA_TRUE;

        tlen = sizeof(struct bfa_fw_stats_s);
        status = bfa_ioc_smem_read(ioc, stats, loff, tlen);

        ioc->stats_busy = BFA_FALSE;
        return status;
}

bfa_status_t
bfa_ioc_fw_stats_clear(struct bfa_ioc_s *ioc)
{
        u32 loff = BFI_IOC_FWSTATS_OFF + \
                BFI_IOC_FWSTATS_SZ * (bfa_ioc_portid(ioc));
        int tlen;
        bfa_status_t status;

        if (ioc->stats_busy) {
                bfa_trc(ioc, ioc->stats_busy);
                return BFA_STATUS_DEVBUSY;
        }
        ioc->stats_busy = BFA_TRUE;

        tlen = sizeof(struct bfa_fw_stats_s);
        status = bfa_ioc_smem_clr(ioc, loff, tlen);

        ioc->stats_busy = BFA_FALSE;
        return status;
}

/*
 * Save firmware trace if configured.
 */
static void
bfa_ioc_debug_save_ftrc(struct bfa_ioc_s *ioc)
{
        int             tlen;

        if (ioc->dbg_fwsave_once) {
                ioc->dbg_fwsave_once = BFA_FALSE;
                if (ioc->dbg_fwsave_len) {
                        tlen = ioc->dbg_fwsave_len;
                        bfa_ioc_debug_fwtrc(ioc, ioc->dbg_fwsave, &tlen);
                }
        }
}

/*
 * Firmware failure detected. Start recovery actions.
 */
static void
bfa_ioc_recover(struct bfa_ioc_s *ioc)
{
        bfa_ioc_stats(ioc, ioc_hbfails);
        bfa_fsm_send_event(ioc, IOC_E_HBFAIL);
}

static void
bfa_ioc_check_attr_wwns(struct bfa_ioc_s *ioc)
{
        if (bfa_ioc_get_type(ioc) == BFA_IOC_TYPE_LL)
                return;
}

/*
 *  BFA IOC PF private functions
 */
static void
bfa_iocpf_timeout(void *ioc_arg)
{
        struct bfa_ioc_s  *ioc = (struct bfa_ioc_s *) ioc_arg;

        bfa_trc(ioc, 0);
        bfa_fsm_send_event(&ioc->iocpf, IOCPF_E_TIMEOUT);
}

static void
bfa_iocpf_sem_timeout(void *ioc_arg)
{
        struct bfa_ioc_s  *ioc = (struct bfa_ioc_s *) ioc_arg;

        bfa_ioc_hw_sem_get(ioc);
}

/*
 *  bfa timer function
 */
void
bfa_timer_beat(struct bfa_timer_mod_s *mod)
{
        struct list_head *qh = &mod->timer_q;
        struct list_head *qe, *qe_next;
        struct bfa_timer_s *elem;
        struct list_head timedout_q;

        INIT_LIST_HEAD(&timedout_q);

        qe = bfa_q_next(qh);

        while (qe != qh) {
                qe_next = bfa_q_next(qe);

                elem = (struct bfa_timer_s *) qe;
                if (elem->timeout <= BFA_TIMER_FREQ) {
                        elem->timeout = 0;
                        list_del(&elem->qe);
                        list_add_tail(&elem->qe, &timedout_q);
                } else {
                        elem->timeout -= BFA_TIMER_FREQ;
                }

                qe = qe_next;   /* go to next elem */
        }

        /*
         * Pop all the timeout entries
         */
        while (!list_empty(&timedout_q)) {
                bfa_q_deq(&timedout_q, &elem);
                elem->timercb(elem->arg);
        }
}

/*
 * Should be called with lock protection
 */
void
bfa_timer_begin(struct bfa_timer_mod_s *mod, struct bfa_timer_s *timer,
                    void (*timercb) (void *), void *arg, unsigned int timeout)
{

        WARN_ON(timercb == NULL);
        WARN_ON(bfa_q_is_on_q(&mod->timer_q, timer));

        timer->timeout = timeout;
        timer->timercb = timercb;
        timer->arg = arg;

        list_add_tail(&timer->qe, &mod->timer_q);
}

/*
 * Should be called with lock protection
 */
void
bfa_timer_stop(struct bfa_timer_s *timer)
{
        WARN_ON(list_empty(&timer->qe));

        list_del(&timer->qe);
}