drivers/scsi/bfa/bfa_ioc.c

/*
 * 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);
}