linux-vybrid_public/drivers/scsi/bfa/bfa_ioc.c

/*
 * Copyright (c) 2005-2009 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 <bfa.h>
#include <bfa_ioc.h>
#include <bfa_fwimg_priv.h>
#include <cna/bfa_cna_trcmod.h>
#include <cs/bfa_debug.h>
#include <bfi/bfi_ioc.h>
#include <bfi/bfi_ctreg.h>
#include <aen/bfa_aen_ioc.h>
#include <aen/bfa_aen.h>
#include <log/bfa_log_hal.h>
#include <defs/bfa_defs_pci.h>

BFA_TRC_FILE(CNA, IOC);

/**
 * IOC local definitions
 */
#define BFA_IOC_TOV		2000	/* msecs */
#define BFA_IOC_HWSEM_TOV       500     /* msecs */
#define BFA_IOC_HB_TOV          500     /* msecs */
#define BFA_IOC_HWINIT_MAX      2
#define BFA_IOC_FWIMG_MINSZ     (16 * 1024)
#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_DBG_FWTRC_ENTS	(BFI_IOC_TRC_ENTS)
#define BFA_DBG_FWTRC_LEN					\
	(BFA_DBG_FWTRC_ENTS * sizeof(struct bfa_trc_s) +	\
	 (sizeof(struct bfa_trc_mod_s) -			\
	  BFA_TRC_MAX * sizeof(struct bfa_trc_s)))
#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_fwimg_get_chunk(__ioc, __off)           \
			((__ioc)->ioc_hwif->ioc_fwimg_get_chunk(__ioc, __off))
#define bfa_ioc_fwimg_get_size(__ioc)                   \
			((__ioc)->ioc_hwif->ioc_fwimg_get_size(__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_hbfail(__ioc)                    \
			((__ioc)->ioc_hwif->ioc_notify_hbfail(__ioc))

bfa_boolean_t   bfa_auto_recover = BFA_TRUE;

/*
 * forward declarations
 */
static void     bfa_ioc_aen_post(struct bfa_ioc_s *bfa,
				 enum bfa_ioc_aen_event event);
static void     bfa_ioc_hw_sem_get(struct bfa_ioc_s *ioc);
static void     bfa_ioc_hw_sem_get_cancel(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_hb_stop(struct bfa_ioc_s *ioc);
static void     bfa_ioc_reset(struct bfa_ioc_s *ioc, bfa_boolean_t force);
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_disable_comp(struct bfa_ioc_s *ioc);
static void     bfa_ioc_lpu_stop(struct bfa_ioc_s *ioc);

/**
 *  bfa_ioc_sm
 */

/**
 * IOC state machine events
 */
enum ioc_event {
	IOC_E_ENABLE = 1,	/*  IOC enable request */
	IOC_E_DISABLE = 2,	/*  IOC disable request */
	IOC_E_TIMEOUT = 3,	/*  f/w response timeout */
	IOC_E_FWREADY = 4,	/*  f/w initialization done */
	IOC_E_FWRSP_GETATTR = 5,	/*  IOC get attribute response */
	IOC_E_FWRSP_ENABLE = 6,	/*  enable f/w response */
	IOC_E_FWRSP_DISABLE = 7,	/*  disable f/w response */
	IOC_E_HBFAIL = 8,	/*  heartbeat failure */
	IOC_E_HWERROR = 9,	/*  hardware error interrupt */
	IOC_E_SEMLOCKED = 10,	/*  h/w semaphore is locked */
	IOC_E_DETACH = 11,	/*  driver detach cleanup */
};

bfa_fsm_state_decl(bfa_ioc, reset, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, fwcheck, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, mismatch, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, semwait, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, hwinit, 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, initfail, struct bfa_ioc_s, enum ioc_event);
bfa_fsm_state_decl(bfa_ioc, hbfail, 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_reset), BFA_IOC_RESET},
	{BFA_SM(bfa_ioc_sm_fwcheck), BFA_IOC_FWMISMATCH},
	{BFA_SM(bfa_ioc_sm_mismatch), BFA_IOC_FWMISMATCH},
	{BFA_SM(bfa_ioc_sm_semwait), BFA_IOC_SEMWAIT},
	{BFA_SM(bfa_ioc_sm_hwinit), BFA_IOC_HWINIT},
	{BFA_SM(bfa_ioc_sm_enabling), BFA_IOC_HWINIT},
	{BFA_SM(bfa_ioc_sm_getattr), BFA_IOC_GETATTR},
	{BFA_SM(bfa_ioc_sm_op), BFA_IOC_OPERATIONAL},
	{BFA_SM(bfa_ioc_sm_initfail), BFA_IOC_INITFAIL},
	{BFA_SM(bfa_ioc_sm_hbfail), BFA_IOC_HBFAIL},
	{BFA_SM(bfa_ioc_sm_disabling), BFA_IOC_DISABLING},
	{BFA_SM(bfa_ioc_sm_disabled), BFA_IOC_DISABLED},
};

/**
 * Reset entry actions -- initialize state machine
 */
static void
bfa_ioc_sm_reset_entry(struct bfa_ioc_s *ioc)
{
	ioc->retry_count = 0;
	ioc->auto_recover = bfa_auto_recover;
}

/**
 * Beginning state. 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_fwcheck);
		break;

	case IOC_E_DISABLE:
		bfa_ioc_disable_comp(ioc);
		break;

	case IOC_E_DETACH:
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}

/**
 * Semaphore should be acquired for version check.
 */
static void
bfa_ioc_sm_fwcheck_entry(struct bfa_ioc_s *ioc)
{
	bfa_ioc_hw_sem_get(ioc);
}

/**
 * Awaiting h/w semaphore to continue with version check.
 */
static void
bfa_ioc_sm_fwcheck(struct bfa_ioc_s *ioc, enum ioc_event event)
{
	bfa_trc(ioc, event);

	switch (event) {
	case IOC_E_SEMLOCKED:
		if (bfa_ioc_firmware_lock(ioc)) {
			ioc->retry_count = 0;
			bfa_fsm_set_state(ioc, bfa_ioc_sm_hwinit);
		} else {
			bfa_ioc_hw_sem_release(ioc);
			bfa_fsm_set_state(ioc, bfa_ioc_sm_mismatch);
		}
		break;

	case IOC_E_DISABLE:
		bfa_ioc_disable_comp(ioc);
		/*
		 * fall through
		 */

	case IOC_E_DETACH:
		bfa_ioc_hw_sem_get_cancel(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_reset);
		break;

	case IOC_E_FWREADY:
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}

/**
 * Notify enable completion callback and generate mismatch AEN.
 */
static void
bfa_ioc_sm_mismatch_entry(struct bfa_ioc_s *ioc)
{
	/**
	 * Provide enable completion callback and AEN notification only once.
	 */
	if (ioc->retry_count == 0) {
		ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
		bfa_ioc_aen_post(ioc, BFA_IOC_AEN_FWMISMATCH);
	}
	ioc->retry_count++;
	bfa_ioc_timer_start(ioc);
}

/**
 * Awaiting firmware version match.
 */
static void
bfa_ioc_sm_mismatch(struct bfa_ioc_s *ioc, enum ioc_event event)
{
	bfa_trc(ioc, event);

	switch (event) {
	case IOC_E_TIMEOUT:
		bfa_fsm_set_state(ioc, bfa_ioc_sm_fwcheck);
		break;

	case IOC_E_DISABLE:
		bfa_ioc_disable_comp(ioc);
		/*
		 * fall through
		 */

	case IOC_E_DETACH:
		bfa_ioc_timer_stop(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_reset);
		break;

	case IOC_E_FWREADY:
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}

/**
 * Request for semaphore.
 */
static void
bfa_ioc_sm_semwait_entry(struct bfa_ioc_s *ioc)
{
	bfa_ioc_hw_sem_get(ioc);
}

/**
 * Awaiting semaphore for h/w initialzation.
 */
static void
bfa_ioc_sm_semwait(struct bfa_ioc_s *ioc, enum ioc_event event)
{
	bfa_trc(ioc, event);

	switch (event) {
	case IOC_E_SEMLOCKED:
		ioc->retry_count = 0;
		bfa_fsm_set_state(ioc, bfa_ioc_sm_hwinit);
		break;

	case IOC_E_DISABLE:
		bfa_ioc_hw_sem_get_cancel(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}


static void
bfa_ioc_sm_hwinit_entry(struct bfa_ioc_s *ioc)
{
	bfa_ioc_timer_start(ioc);
	bfa_ioc_reset(ioc, BFA_FALSE);
}

/**
 * Hardware is being initialized. Interrupts are enabled.
 * Holding hardware semaphore lock.
 */
static void
bfa_ioc_sm_hwinit(struct bfa_ioc_s *ioc, enum ioc_event event)
{
	bfa_trc(ioc, event);

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

	case IOC_E_HWERROR:
		bfa_ioc_timer_stop(ioc);
		/*
		 * fall through
		 */

	case IOC_E_TIMEOUT:
		ioc->retry_count++;
		if (ioc->retry_count < BFA_IOC_HWINIT_MAX) {
			bfa_ioc_timer_start(ioc);
			bfa_ioc_reset(ioc, BFA_TRUE);
			break;
		}

		bfa_ioc_hw_sem_release(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_initfail);
		break;

	case IOC_E_DISABLE:
		bfa_ioc_hw_sem_release(ioc);
		bfa_ioc_timer_stop(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}


static void
bfa_ioc_sm_enabling_entry(struct bfa_ioc_s *ioc)
{
	bfa_ioc_timer_start(ioc);
	bfa_ioc_send_enable(ioc);
}

/**
 * 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_FWRSP_ENABLE:
		bfa_ioc_timer_stop(ioc);
		bfa_ioc_hw_sem_release(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_getattr);
		break;

	case IOC_E_HWERROR:
		bfa_ioc_timer_stop(ioc);
		/*
		 * fall through
		 */

	case IOC_E_TIMEOUT:
		ioc->retry_count++;
		if (ioc->retry_count < BFA_IOC_HWINIT_MAX) {
			bfa_reg_write(ioc->ioc_regs.ioc_fwstate,
				      BFI_IOC_UNINIT);
			bfa_fsm_set_state(ioc, bfa_ioc_sm_hwinit);
			break;
		}

		bfa_ioc_hw_sem_release(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_initfail);
		break;

	case IOC_E_DISABLE:
		bfa_ioc_timer_stop(ioc);
		bfa_ioc_hw_sem_release(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		break;

	case IOC_E_FWREADY:
		bfa_ioc_send_enable(ioc);
		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_fsm_set_state(ioc, bfa_ioc_sm_op);
		break;

	case IOC_E_HWERROR:
		bfa_ioc_timer_stop(ioc);
		/*
		 * fall through
		 */

	case IOC_E_TIMEOUT:
		bfa_fsm_set_state(ioc, bfa_ioc_sm_initfail);
		break;

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

	default:
		bfa_sm_fault(ioc, event);
	}
}


static void
bfa_ioc_sm_op_entry(struct bfa_ioc_s *ioc)
{
	ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_OK);
	bfa_ioc_hb_monitor(ioc);
	bfa_ioc_aen_post(ioc, BFA_IOC_AEN_ENABLE);
}

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_ioc_hb_stop(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabling);
		break;

	case IOC_E_HWERROR:
	case IOC_E_FWREADY:
		/**
		 * Hard error or IOC recovery by other function.
		 * Treat it same as heartbeat failure.
		 */
		bfa_ioc_hb_stop(ioc);
		/*
		 * !!! fall through !!!
		 */

	case IOC_E_HBFAIL:
		bfa_fsm_set_state(ioc, bfa_ioc_sm_hbfail);
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}


static void
bfa_ioc_sm_disabling_entry(struct bfa_ioc_s *ioc)
{
	bfa_ioc_aen_post(ioc, BFA_IOC_AEN_DISABLE);
	bfa_ioc_timer_start(ioc);
	bfa_ioc_send_disable(ioc);
}

/**
 * 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_FWRSP_DISABLE:
		bfa_ioc_timer_stop(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		break;

	case IOC_E_HWERROR:
		bfa_ioc_timer_stop(ioc);
		/*
		 * !!! fall through !!!
		 */

	case IOC_E_TIMEOUT:
		bfa_reg_write(ioc->ioc_regs.ioc_fwstate, BFI_IOC_FAIL);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		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_semwait);
		break;

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

	case IOC_E_FWREADY:
		break;

	case IOC_E_DETACH:
		bfa_ioc_firmware_unlock(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_reset);
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}


static void
bfa_ioc_sm_initfail_entry(struct bfa_ioc_s *ioc)
{
	ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
	bfa_ioc_timer_start(ioc);
}

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

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

	case IOC_E_DETACH:
		bfa_ioc_timer_stop(ioc);
		bfa_ioc_firmware_unlock(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_reset);
		break;

	case IOC_E_TIMEOUT:
		bfa_fsm_set_state(ioc, bfa_ioc_sm_semwait);
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}


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

	/**
	 * Mark IOC as failed in hardware and stop firmware.
	 */
	bfa_ioc_lpu_stop(ioc);
	bfa_reg_write(ioc->ioc_regs.ioc_fwstate, BFI_IOC_FAIL);

	/**
	 * Notify other functions on HB failure.
	 */
	bfa_ioc_notify_hbfail(ioc);

	/**
	 * 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);
	}

	/**
	 * Flush any queued up mailbox requests.
	 */
	bfa_ioc_mbox_hbfail(ioc);
	bfa_ioc_aen_post(ioc, BFA_IOC_AEN_HBFAIL);

	/**
	 * Trigger auto-recovery after a delay.
	 */
	if (ioc->auto_recover) {
		bfa_timer_begin(ioc->timer_mod, &ioc->ioc_timer,
				bfa_ioc_timeout, ioc, BFA_IOC_TOV_RECOVER);
	}
}

/**
 * IOC heartbeat failure.
 */
static void
bfa_ioc_sm_hbfail(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:
		if (ioc->auto_recover)
			bfa_ioc_timer_stop(ioc);
		bfa_fsm_set_state(ioc, bfa_ioc_sm_disabled);
		break;

	case IOC_E_TIMEOUT:
		bfa_fsm_set_state(ioc, bfa_ioc_sm_semwait);
		break;

	case IOC_E_FWREADY:
		/**
		 * Recovery is already initiated by other function.
		 */
		break;

	case IOC_E_HWERROR:
		/*
		 * HB failure notification, ignore.
		 */
		break;

	default:
		bfa_sm_fault(ioc, event);
	}
}



/**
 *  bfa_ioc_pvt 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);
	}
}

void
bfa_ioc_sem_timeout(void *ioc_arg)
{
	struct bfa_ioc_s *ioc = (struct bfa_ioc_s *)ioc_arg;

	bfa_ioc_hw_sem_get(ioc);
}

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

	r32 = bfa_reg_read(sem_reg);

	while (r32 && (cnt < BFA_SEM_SPINCNT)) {
		cnt++;
		bfa_os_udelay(2);
		r32 = bfa_reg_read(sem_reg);
	}

	if (r32 == 0)
		return BFA_TRUE;

	bfa_assert(cnt < BFA_SEM_SPINCNT);
	return BFA_FALSE;
}

void
bfa_ioc_sem_release(bfa_os_addr_t sem_reg)
{
	bfa_reg_write(sem_reg, 1);
}

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 = bfa_reg_read(ioc->ioc_regs.ioc_sem_reg);
	if (r32 == 0) {
		bfa_fsm_send_event(ioc, IOC_E_SEMLOCKED);
		return;
	}

	bfa_timer_begin(ioc->timer_mod, &ioc->sem_timer, bfa_ioc_sem_timeout,
			ioc, BFA_IOC_HWSEM_TOV);
}

void
bfa_ioc_hw_sem_release(struct bfa_ioc_s *ioc)
{
	bfa_reg_write(ioc->ioc_regs.ioc_sem_reg, 1);
}

static void
bfa_ioc_hw_sem_get_cancel(struct bfa_ioc_s *ioc)
{
	bfa_timer_stop(&ioc->sem_timer);
}

/**
 * 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 = bfa_reg_read(ioc->ioc_regs.pss_ctl_reg);
	pss_ctl &= ~__PSS_LMEM_RESET;
	pss_ctl |= __PSS_LMEM_INIT_EN;
	pss_ctl |= __PSS_I2C_CLK_DIV(3UL); /* i2c workaround 12.5khz clock */
	bfa_reg_write(ioc->ioc_regs.pss_ctl_reg, pss_ctl);

	/**
	 * wait for memory initialization to be complete
	 */
	i = 0;
	do {
		pss_ctl = bfa_reg_read(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.
	 */
	bfa_assert(pss_ctl & __PSS_LMEM_INIT_DONE);
	bfa_trc(ioc, pss_ctl);

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

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

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

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

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

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

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

/**
 * 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 = bfa_ioc_smem_pgnum(ioc, loff);
	pgoff = bfa_ioc_smem_pgoff(ioc, loff);
	bfa_reg_write(ioc->ioc_regs.host_page_num_fn, pgnum);

	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_ioc_fwimg_get_chunk(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)
{
	struct bfi_ioc_image_hdr_s fwhdr, *drv_fwhdr;

	/**
	 * If bios/efi boot (flash based) -- return true
	 */
	if (bfa_ioc_fwimg_get_size(ioc) < BFA_IOC_FWIMG_MINSZ)
		return BFA_TRUE;

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

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

	if (fwhdr.exec != drv_fwhdr->exec) {
		bfa_trc(ioc, fwhdr.exec);
		bfa_trc(ioc, drv_fwhdr->exec);
		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 = bfa_reg_read(ioc->ioc_regs.lpu_mbox_cmd);
	if (r32)
		bfa_reg_write(ioc->ioc_regs.lpu_mbox_cmd, 1);
}


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

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

	if (force)
		ioc_fwstate = BFI_IOC_UNINIT;

	bfa_trc(ioc, ioc_fwstate);

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

	if (!fwvalid) {
		bfa_ioc_boot(ioc, BFI_BOOT_TYPE_NORMAL, ioc->pcidev.device_id);
		return;
	}

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

	/**
	 * If IOC function is disabled and firmware version is same,
	 * just re-enable IOC.
	 */
	if (ioc_fwstate == BFI_IOC_DISABLED || ioc_fwstate == BFI_IOC_OP) {
		bfa_trc(ioc, ioc_fwstate);

		/**
		 * 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, IOC_E_FWREADY);
		return;
	}

	/**
	 * Initialize the h/w for any other states.
	 */
	bfa_ioc_boot(ioc, BFI_BOOT_TYPE_NORMAL, ioc->pcidev.device_id);
}

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);

	bfa_assert(len <= BFI_IOC_MSGLEN_MAX);

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

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

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

	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;
	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 = bfa_reg_read(ioc->ioc_regs.heartbeat);
	if (ioc->hb_count == hb_count) {
		bfa_log(ioc->logm, BFA_LOG_HAL_HEARTBEAT_FAILURE,
			hb_count);
		bfa_ioc_recover(ioc);
		return;
	} else {
		ioc->hb_count = hb_count;
	}

	bfa_ioc_mbox_poll(ioc);
	bfa_timer_begin(ioc->timer_mod, &ioc->ioc_timer, bfa_ioc_hb_check,
			ioc, BFA_IOC_HB_TOV);
}

static void
bfa_ioc_hb_monitor(struct bfa_ioc_s *ioc)
{
	ioc->hb_count = bfa_reg_read(ioc->ioc_regs.heartbeat);
	bfa_timer_begin(ioc->timer_mod, &ioc->ioc_timer, bfa_ioc_hb_check, ioc,
			BFA_IOC_HB_TOV);
}

static void
bfa_ioc_hb_stop(struct bfa_ioc_s *ioc)
{
	bfa_timer_stop(&ioc->ioc_timer);
}

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

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

	/**
	 * Flash based firmware boot
	 */
	bfa_trc(ioc, bfa_ioc_fwimg_get_size(ioc));
	if (bfa_ioc_fwimg_get_size(ioc) < BFA_IOC_FWIMG_MINSZ)
		boot_type = BFI_BOOT_TYPE_FLASH;
	fwimg = bfa_ioc_fwimg_get_chunk(ioc, chunkno);

	pgnum = bfa_ioc_smem_pgnum(ioc, loff);
	pgoff = bfa_ioc_smem_pgoff(ioc, loff);

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

	for (i = 0; i < bfa_ioc_fwimg_get_size(ioc); i++) {

		if (BFA_IOC_FLASH_CHUNK_NO(i) != chunkno) {
			chunkno = BFA_IOC_FLASH_CHUNK_NO(i);
			fwimg = bfa_ioc_fwimg_get_chunk(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++;
			bfa_reg_write(ioc->ioc_regs.host_page_num_fn, pgnum);
		}
	}

	bfa_reg_write(ioc->ioc_regs.host_page_num_fn,
		      bfa_ioc_smem_pgnum(ioc, 0));

	/*
	 * Set boot type and boot param at the end.
	 */
	bfa_mem_write(ioc->ioc_regs.smem_page_start, BFI_BOOT_TYPE_OFF,
			bfa_os_swap32(boot_type));
	bfa_mem_write(ioc->ioc_regs.smem_page_start, BFI_BOOT_PARAM_OFF,
			bfa_os_swap32(boot_param));
}

static void
bfa_ioc_reset(struct bfa_ioc_s *ioc, bfa_boolean_t force)
{
	bfa_ioc_hwinit(ioc, force);
}

/**
 * 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 = bfa_os_ntohl(attr->adapter_prop);
	attr->maxfrsize = bfa_os_ntohs(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 = bfa_reg_read(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);
}

/**
 *  bfa_ioc_public
 */

/**
 * 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_param)
{
	bfa_os_addr_t   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_param == BFI_BOOT_TYPE_MEMTEST) {
		bfa_reg_write((rb + BFA_IOC0_STATE_REG), BFI_IOC_MEMTEST);
		bfa_reg_write((rb + BFA_IOC1_STATE_REG), BFI_IOC_MEMTEST);
	} else {
		bfa_reg_write((rb + BFA_IOC0_STATE_REG), BFI_IOC_INITING);
		bfa_reg_write((rb + BFA_IOC1_STATE_REG), BFI_IOC_INITING);
	}

	bfa_ioc_download_fw(ioc, boot_type, boot_param);

	/**
	 * 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);
}

void
bfa_ioc_msgget(struct bfa_ioc_s *ioc, void *mbmsg)
{
	u32       *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 = bfa_reg_read(ioc->ioc_regs.lpu_mbox +
				   i * sizeof(u32));
		msgp[i] = bfa_os_htonl(r32);
	}

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

	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(ioc, IOC_E_FWREADY);
		break;

	case BFI_IOC_I2H_ENABLE_REPLY:
		bfa_fsm_send_event(ioc, IOC_E_FWRSP_ENABLE);
		break;

	case BFI_IOC_I2H_DISABLE_REPLY:
		bfa_fsm_send_event(ioc, IOC_E_FWRSP_DISABLE);
		break;

	case BFI_IOC_I2H_GETATTR_REPLY:
		bfa_ioc_getattr_reply(ioc);
		break;

	default:
		bfa_trc(ioc, msg->mh.msg_id);
		bfa_assert(0);
	}
}

/**
 * IOC attach time initialization and setup.
 *
 * @param[in]	ioc	memory for IOC
 * @param[in]	bfa	driver instance structure
 * @param[in]	trcmod	kernel trace module
 * @param[in]	aen	kernel aen event module
 * @param[in]	logm	kernel logging module
 */
void
bfa_ioc_attach(struct bfa_ioc_s *ioc, void *bfa, struct bfa_ioc_cbfn_s *cbfn,
	       struct bfa_timer_mod_s *timer_mod, struct bfa_trc_mod_s *trcmod,
	       struct bfa_aen_s *aen, struct bfa_log_mod_s *logm)
{
	ioc->bfa = bfa;
	ioc->cbfn = cbfn;
	ioc->timer_mod = timer_mod;
	ioc->trcmod = trcmod;
	ioc->aen = aen;
	ioc->logm = logm;
	ioc->fcmode = BFA_FALSE;
	ioc->pllinit = BFA_FALSE;
	ioc->dbg_fwsave_once = BFA_TRUE;

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

	bfa_fsm_set_state(ioc, bfa_ioc_sm_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 = (ioc->pcidev.device_id == BFA_PCI_DEVICE_ID_CT);
	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;
}

/**
 * Return size of dma memory required.
 */
u32
bfa_ioc_meminfo(void)
{
	return BFA_ROUNDUP(sizeof(struct bfi_ioc_attr_s), BFA_DMA_ALIGN_SZ);
}

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);
}

/**
 * Returns memory required for saving firmware trace in case of crash.
 * Driver must call this interface to allocate memory required for
 * automatic saving of firmware trace. Driver should call
 * bfa_ioc_debug_memclaim() right after bfa_ioc_attach() to setup this
 * trace memory.
 */
int
bfa_ioc_debug_trcsz(bfa_boolean_t auto_recover)
{
return (auto_recover) ? BFA_DBG_FWTRC_LEN : 0;
}

/**
 * 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 = bfa_ioc_debug_trcsz(ioc->auto_recover);
}

u32
bfa_ioc_smem_pgnum(struct bfa_ioc_s *ioc, u32 fmaddr)
{
	return PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, fmaddr);
}

u32
bfa_ioc_smem_pgoff(struct bfa_ioc_s *ioc, u32 fmaddr)
{
	return PSS_SMEM_PGOFF(fmaddr);
}

/**
 * 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 = bfa_reg_read(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);
}

#ifndef BFA_BIOS_BUILD

/**
 * 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, bfa_ioc_sm_fwcheck)
		|| bfa_fsm_cmp_state(ioc, bfa_ioc_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;
	bfa_os_addr_t   rb = ioc->pcidev.pci_bar_kva;

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

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

	ioc_state = bfa_reg_read(rb + BFA_IOC1_STATE_REG);
	if (!bfa_ioc_state_disabled(ioc_state))
		return BFA_FALSE;

	return BFA_TRUE;
}

/**
 * Add to IOC heartbeat failure notification queue. To be used by common
 * modules such as
 */
void
bfa_ioc_hbfail_register(struct bfa_ioc_s *ioc,
			struct bfa_ioc_hbfail_notify_s *notify)
{
	list_add_tail(&notify->qe, &ioc->hb_notify_q);
}

#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);
	bfa_os_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);

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

	ad_attr->pwwn = bfa_ioc_get_pwwn(ioc);
	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;
}

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 {
		bfa_assert(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)
{
	bfa_os_memset((void *)serial_num, 0, BFA_ADAPTER_SERIAL_NUM_LEN);
	bfa_os_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)
{
	bfa_os_memset((void *)fw_ver, 0, BFA_VERSION_LEN);
	bfa_os_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)
{
	bfa_assert(chip_rev);

	bfa_os_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)
{
	bfa_os_memset((void *)optrom_ver, 0, BFA_VERSION_LEN);
	bfa_os_memcpy(optrom_ver, ioc->attr->optrom_version,
		BFA_VERSION_LEN);
}

void
bfa_ioc_get_adapter_manufacturer(struct bfa_ioc_s *ioc, char *manufacturer)
{
	bfa_os_memset((void *)manufacturer, 0, BFA_ADAPTER_MFG_NAME_LEN);
	bfa_os_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;
	u8              nports;
	u8              max_speed;

	bfa_assert(model);
	bfa_os_memset((void *)model, 0, BFA_ADAPTER_MODEL_NAME_LEN);

	ioc_attr = ioc->attr;

	nports = bfa_ioc_get_nports(ioc);
	max_speed = bfa_ioc_speed_sup(ioc);

	/**
	 * model name
	 */
	if (max_speed == 10) {
		strcpy(model, "BR-10?0");
		model[5] = '0' + nports;
	} else {
		strcpy(model, "Brocade-??5");
		model[8] = '0' + max_speed;
		model[9] = '0' + nports;
	}
}

enum bfa_ioc_state
bfa_ioc_get_state(struct bfa_ioc_s *ioc)
{
	return bfa_sm_to_state(ioc_sm_table, ioc->fsm);
}

void
bfa_ioc_get_attr(struct bfa_ioc_s *ioc, struct bfa_ioc_attr_s *ioc_attr)
{
	bfa_os_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);
}

/**
 *  hal_wwn_public
 */
wwn_t
bfa_ioc_get_pwwn(struct bfa_ioc_s *ioc)
{
	union {
		wwn_t           wwn;
		u8         byte[sizeof(wwn_t)];
	}
	w;

	w.wwn = ioc->attr->mfg_wwn;

	if (bfa_ioc_portid(ioc) == 1)
		w.byte[7]++;

	return w.wwn;
}

wwn_t
bfa_ioc_get_nwwn(struct bfa_ioc_s *ioc)
{
	union {
		wwn_t           wwn;
		u8         byte[sizeof(wwn_t)];
	}
	w;

	w.wwn = ioc->attr->mfg_wwn;

	if (bfa_ioc_portid(ioc) == 1)
		w.byte[7]++;

	w.byte[0] = 0x20;

	return w.wwn;
}

wwn_t
bfa_ioc_get_wwn_naa5(struct bfa_ioc_s *ioc, u16 inst)
{
	union {
		wwn_t           wwn;
		u8         byte[sizeof(wwn_t)];
	}
	w              , w5;

	bfa_trc(ioc, inst);

	w.wwn = ioc->attr->mfg_wwn;
	w5.byte[0] = 0x50 | w.byte[2] >> 4;
	w5.byte[1] = w.byte[2] << 4 | w.byte[3] >> 4;
	w5.byte[2] = w.byte[3] << 4 | w.byte[4] >> 4;
	w5.byte[3] = w.byte[4] << 4 | w.byte[5] >> 4;
	w5.byte[4] = w.byte[5] << 4 | w.byte[6] >> 4;
	w5.byte[5] = w.byte[6] << 4 | w.byte[7] >> 4;
	w5.byte[6] = w.byte[7] << 4 | (inst & 0x0f00) >> 8;
	w5.byte[7] = (inst & 0xff);

	return w5.wwn;
}

u64
bfa_ioc_get_adid(struct bfa_ioc_s *ioc)
{
	return ioc->attr->mfg_wwn;
}

mac_t
bfa_ioc_get_mac(struct bfa_ioc_s *ioc)
{
	mac_t           mac;

	mac = ioc->attr->mfg_mac;
	mac.mac[MAC_ADDRLEN - 1] += bfa_ioc_pcifn(ioc);

	return mac;
}

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

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

/**
 * Send AEN notification
 */
static void
bfa_ioc_aen_post(struct bfa_ioc_s *ioc, enum bfa_ioc_aen_event event)
{
	union bfa_aen_data_u aen_data;
	struct bfa_log_mod_s *logmod = ioc->logm;
	s32         inst_num = 0;
	enum bfa_ioc_type_e ioc_type;

	bfa_log(logmod, BFA_LOG_CREATE_ID(BFA_AEN_CAT_IOC, event), inst_num);

	memset(&aen_data.ioc.pwwn, 0, sizeof(aen_data.ioc.pwwn));
	memset(&aen_data.ioc.mac, 0, sizeof(aen_data.ioc.mac));
	ioc_type = bfa_ioc_get_type(ioc);
	switch (ioc_type) {
	case BFA_IOC_TYPE_FC:
		aen_data.ioc.pwwn = bfa_ioc_get_pwwn(ioc);
		break;
	case BFA_IOC_TYPE_FCoE:
		aen_data.ioc.pwwn = bfa_ioc_get_pwwn(ioc);
		aen_data.ioc.mac = bfa_ioc_get_mac(ioc);
		break;
	case BFA_IOC_TYPE_LL:
		aen_data.ioc.mac = bfa_ioc_get_mac(ioc);
		break;
	default:
		bfa_assert(ioc_type == BFA_IOC_TYPE_FC);
		break;
	}
	aen_data.ioc.ioc_type = ioc_type;
}

/**
 * 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;

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

/**
 * Clear saved firmware trace
 */
void
bfa_ioc_debug_fwsave_clear(struct bfa_ioc_s *ioc)
{
	ioc->dbg_fwsave_once = BFA_TRUE;
}

/**
 * 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        pgnum;
	u32        loff = BFA_DBG_FWTRC_OFF(bfa_ioc_portid(ioc));
	int             i, tlen;
	u32       *tbuf = trcdata, r32;

	bfa_trc(ioc, *trclen);

	pgnum = bfa_ioc_smem_pgnum(ioc, loff);
	loff = bfa_ioc_smem_pgoff(ioc, loff);

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

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

	tlen = *trclen;
	if (tlen > BFA_DBG_FWTRC_LEN)
		tlen = BFA_DBG_FWTRC_LEN;
	tlen /= sizeof(u32);

	bfa_trc(ioc, tlen);

	for (i = 0; i < tlen; i++) {
		r32 = bfa_mem_read(ioc->ioc_regs.smem_page_start, loff);
		tbuf[i] = bfa_os_ntohl(r32);
		loff += sizeof(u32);

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

	/*
	 *  release semaphore.
	 */
	bfa_ioc_sem_release(ioc->ioc_regs.ioc_init_sem_reg);

	bfa_trc(ioc, pgnum);

	*trclen = tlen * sizeof(u32);
	return BFA_STATUS_OK;
}

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

	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)
{
	if (ioc->dbg_fwsave_once) {
		ioc->dbg_fwsave_once = BFA_FALSE;
		bfa_ioc_debug_save(ioc);
	}

	bfa_ioc_stats(ioc, ioc_hbfails);
	bfa_fsm_send_event(ioc, IOC_E_HBFAIL);
}

#else

static void
bfa_ioc_aen_post(struct bfa_ioc_s *ioc, enum bfa_ioc_aen_event event)
{
}

static void
bfa_ioc_recover(struct bfa_ioc_s *ioc)
{
	bfa_assert(0);
}

#endif