drivers/scsi/bfa/bfa_port.c - kernel/msm-4.19 - Gitiles

 /*
  * 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_defs_svc.h"
 #include "bfa_port.h"
 #include "bfi.h"
 #include "bfa_ioc.h"


 BFA_TRC_FILE(CNA, PORT);

 static void
 bfa_port_stats_swap(struct bfa_port_s *port, union bfa_port_stats_u *stats)
 {
 	u32    *dip = (u32 *) stats;
 	__be32    t0, t1;
 	int	    i;

 	for (i = 0; i < sizeof(union bfa_port_stats_u)/sizeof(u32);
 		i += 2) {
 		t0 = dip[i];
 		t1 = dip[i + 1];
 #ifdef __BIG_ENDIAN
 		dip[i] = be32_to_cpu(t0);
 		dip[i + 1] = be32_to_cpu(t1);
 #else
 		dip[i] = be32_to_cpu(t1);
 		dip[i + 1] = be32_to_cpu(t0);
 #endif
 	}
 }

 /*
  * bfa_port_enable_isr()
  *
  *
  * @param[in] port - Pointer to the port module
  *            status - Return status from the f/w
  *
  * @return void
  */
 static void
 bfa_port_enable_isr(struct bfa_port_s *port, bfa_status_t status)
 {
 	bfa_trc(port, status);
 	port->endis_pending = BFA_FALSE;
 	port->endis_cbfn(port->endis_cbarg, status);
 }

 /*
  * bfa_port_disable_isr()
  *
  *
  * @param[in] port - Pointer to the port module
  *            status - Return status from the f/w
  *
  * @return void
  */
 static void
 bfa_port_disable_isr(struct bfa_port_s *port, bfa_status_t status)
 {
 	bfa_trc(port, status);
 	port->endis_pending = BFA_FALSE;
 	port->endis_cbfn(port->endis_cbarg, status);
 }

 /*
  * bfa_port_get_stats_isr()
  *
  *
  * @param[in] port - Pointer to the Port module
  *            status - Return status from the f/w
  *
  * @return void
  */
 static void
 bfa_port_get_stats_isr(struct bfa_port_s *port, bfa_status_t status)
 {
 	port->stats_status = status;
 	port->stats_busy = BFA_FALSE;

 	if (status == BFA_STATUS_OK) {
 		struct timeval tv;

 		memcpy(port->stats, port->stats_dma.kva,
 		       sizeof(union bfa_port_stats_u));
 		bfa_port_stats_swap(port, port->stats);

 		do_gettimeofday(&tv);
 		port->stats->fc.secs_reset = tv.tv_sec - port->stats_reset_time;
 	}

 	if (port->stats_cbfn) {
 		port->stats_cbfn(port->stats_cbarg, status);
 		port->stats_cbfn = NULL;
 	}
 }

 /*
  * bfa_port_clear_stats_isr()
  *
  *
  * @param[in] port - Pointer to the Port module
  *            status - Return status from the f/w
  *
  * @return void
  */
 static void
 bfa_port_clear_stats_isr(struct bfa_port_s *port, bfa_status_t status)
 {
 	struct timeval tv;

 	port->stats_status = status;
 	port->stats_busy   = BFA_FALSE;

 	/*
 	* re-initialize time stamp for stats reset
 	*/
 	do_gettimeofday(&tv);
 	port->stats_reset_time = tv.tv_sec;

 	if (port->stats_cbfn) {
 		port->stats_cbfn(port->stats_cbarg, status);
 		port->stats_cbfn = NULL;
 	}
 }

 /*
  * bfa_port_isr()
  *
  *
  * @param[in] Pointer to the Port module data structure.
  *
  * @return void
  */
 static void
 bfa_port_isr(void *cbarg, struct bfi_mbmsg_s *m)
 {
 	struct bfa_port_s *port = (struct bfa_port_s *) cbarg;
 	union bfi_port_i2h_msg_u *i2hmsg;

 	i2hmsg = (union bfi_port_i2h_msg_u *) m;
 	bfa_trc(port, m->mh.msg_id);

 	switch (m->mh.msg_id) {
 	case BFI_PORT_I2H_ENABLE_RSP:
 		if (port->endis_pending == BFA_FALSE)
 			break;
 		bfa_port_enable_isr(port, i2hmsg->enable_rsp.status);
 		break;

 	case BFI_PORT_I2H_DISABLE_RSP:
 		if (port->endis_pending == BFA_FALSE)
 			break;
 		bfa_port_disable_isr(port, i2hmsg->disable_rsp.status);
 		break;

 	case BFI_PORT_I2H_GET_STATS_RSP:
 		/* Stats busy flag is still set? (may be cmd timed out) */
 		if (port->stats_busy == BFA_FALSE)
 			break;
 		bfa_port_get_stats_isr(port, i2hmsg->getstats_rsp.status);
 		break;

 	case BFI_PORT_I2H_CLEAR_STATS_RSP:
 		if (port->stats_busy == BFA_FALSE)
 			break;
 		bfa_port_clear_stats_isr(port, i2hmsg->clearstats_rsp.status);
 		break;

 	default:
 		WARN_ON(1);
 	}
 }

 /*
  * bfa_port_meminfo()
  *
  *
  * @param[in] void
  *
  * @return Size of DMA region
  */
 u32
 bfa_port_meminfo(void)
 {
 	return BFA_ROUNDUP(sizeof(union bfa_port_stats_u), BFA_DMA_ALIGN_SZ);
 }

 /*
  * bfa_port_mem_claim()
  *
  *
  * @param[in] port Port module pointer
  *	      dma_kva Kernel Virtual Address of Port DMA Memory
  *	      dma_pa  Physical Address of Port DMA Memory
  *
  * @return void
  */
 void
 bfa_port_mem_claim(struct bfa_port_s *port, u8 *dma_kva, u64 dma_pa)
 {
 	port->stats_dma.kva = dma_kva;
 	port->stats_dma.pa  = dma_pa;
 }

 /*
  * bfa_port_enable()
  *
  *   Send the Port enable request to the f/w
  *
  * @param[in] Pointer to the Port module data structure.
  *
  * @return Status
  */
 bfa_status_t
 bfa_port_enable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
 		 void *cbarg)
 {
 	struct bfi_port_generic_req_s *m;

 	/* If port is PBC disabled, return error */
 	if (port->pbc_disabled) {
 		bfa_trc(port, BFA_STATUS_PBC);
 		return BFA_STATUS_PBC;
 	}

 	if (bfa_ioc_is_disabled(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_DISABLED);
 		return BFA_STATUS_IOC_DISABLED;
 	}

 	if (!bfa_ioc_is_operational(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 		return BFA_STATUS_IOC_FAILURE;
 	}

 	if (port->endis_pending) {
 		bfa_trc(port, BFA_STATUS_DEVBUSY);
 		return BFA_STATUS_DEVBUSY;
 	}

 	m = (struct bfi_port_generic_req_s *) port->endis_mb.msg;

 	port->msgtag++;
 	port->endis_cbfn    = cbfn;
 	port->endis_cbarg   = cbarg;
 	port->endis_pending = BFA_TRUE;

 	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_ENABLE_REQ,
 		    bfa_ioc_portid(port->ioc));
 	bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);

 	return BFA_STATUS_OK;
 }

 /*
  * bfa_port_disable()
  *
  *   Send the Port disable request to the f/w
  *
  * @param[in] Pointer to the Port module data structure.
  *
  * @return Status
  */
 bfa_status_t
 bfa_port_disable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
 		  void *cbarg)
 {
 	struct bfi_port_generic_req_s *m;

 	/* If port is PBC disabled, return error */
 	if (port->pbc_disabled) {
 		bfa_trc(port, BFA_STATUS_PBC);
 		return BFA_STATUS_PBC;
 	}

 	if (bfa_ioc_is_disabled(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_DISABLED);
 		return BFA_STATUS_IOC_DISABLED;
 	}

 	if (!bfa_ioc_is_operational(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 		return BFA_STATUS_IOC_FAILURE;
 	}

 	if (port->endis_pending) {
 		bfa_trc(port, BFA_STATUS_DEVBUSY);
 		return BFA_STATUS_DEVBUSY;
 	}

 	m = (struct bfi_port_generic_req_s *) port->endis_mb.msg;

 	port->msgtag++;
 	port->endis_cbfn    = cbfn;
 	port->endis_cbarg   = cbarg;
 	port->endis_pending = BFA_TRUE;

 	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_DISABLE_REQ,
 		    bfa_ioc_portid(port->ioc));
 	bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);

 	return BFA_STATUS_OK;
 }

 /*
  * bfa_port_get_stats()
  *
  *   Send the request to the f/w to fetch Port statistics.
  *
  * @param[in] Pointer to the Port module data structure.
  *
  * @return Status
  */
 bfa_status_t
 bfa_port_get_stats(struct bfa_port_s *port, union bfa_port_stats_u *stats,
 		    bfa_port_stats_cbfn_t cbfn, void *cbarg)
 {
 	struct bfi_port_get_stats_req_s *m;

 	if (!bfa_ioc_is_operational(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 		return BFA_STATUS_IOC_FAILURE;
 	}

 	if (port->stats_busy) {
 		bfa_trc(port, BFA_STATUS_DEVBUSY);
 		return BFA_STATUS_DEVBUSY;
 	}

 	m = (struct bfi_port_get_stats_req_s *) port->stats_mb.msg;

 	port->stats	  = stats;
 	port->stats_cbfn  = cbfn;
 	port->stats_cbarg = cbarg;
 	port->stats_busy  = BFA_TRUE;
 	bfa_dma_be_addr_set(m->dma_addr, port->stats_dma.pa);

 	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_GET_STATS_REQ,
 		    bfa_ioc_portid(port->ioc));
 	bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);

 	return BFA_STATUS_OK;
 }

 /*
  * bfa_port_clear_stats()
  *
  *
  * @param[in] Pointer to the Port module data structure.
  *
  * @return Status
  */
 bfa_status_t
 bfa_port_clear_stats(struct bfa_port_s *port, bfa_port_stats_cbfn_t cbfn,
 		      void *cbarg)
 {
 	struct bfi_port_generic_req_s *m;

 	if (!bfa_ioc_is_operational(port->ioc)) {
 		bfa_trc(port, BFA_STATUS_IOC_FAILURE);
 		return BFA_STATUS_IOC_FAILURE;
 	}

 	if (port->stats_busy) {
 		bfa_trc(port, BFA_STATUS_DEVBUSY);
 		return BFA_STATUS_DEVBUSY;
 	}

 	m = (struct bfi_port_generic_req_s *) port->stats_mb.msg;

 	port->stats_cbfn  = cbfn;
 	port->stats_cbarg = cbarg;
 	port->stats_busy  = BFA_TRUE;

 	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_CLEAR_STATS_REQ,
 		    bfa_ioc_portid(port->ioc));
 	bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);

 	return BFA_STATUS_OK;
 }

 /*
  * bfa_port_notify()
  *
  * Port module IOC event handler
  *
  * @param[in] Pointer to the Port module data structure.
  * @param[in] IOC event structure
  *
  * @return void
  */
 void
 bfa_port_notify(void *arg, enum bfa_ioc_event_e event)
 {
 	struct bfa_port_s *port = (struct bfa_port_s *) arg;

 	switch (event) {
 	case BFA_IOC_E_DISABLED:
 	case BFA_IOC_E_FAILED:
 		/* Fail any pending get_stats/clear_stats requests */
 		if (port->stats_busy) {
 			if (port->stats_cbfn)
 				port->stats_cbfn(port->stats_cbarg,
 						BFA_STATUS_FAILED);
 			port->stats_cbfn = NULL;
 			port->stats_busy = BFA_FALSE;
 		}

 		/* Clear any enable/disable is pending */
 		if (port->endis_pending) {
 			if (port->endis_cbfn)
 				port->endis_cbfn(port->endis_cbarg,
 						BFA_STATUS_FAILED);
 			port->endis_cbfn = NULL;
 			port->endis_pending = BFA_FALSE;
 		}
 		break;
 	default:
 		break;
 	}
 }

 /*
  * bfa_port_attach()
  *
  *
  * @param[in] port - Pointer to the Port module data structure
  *            ioc  - Pointer to the ioc module data structure
  *            dev  - Pointer to the device driver module data structure
  *                   The device driver specific mbox ISR functions have
  *                   this pointer as one of the parameters.
  *            trcmod -
  *
  * @return void
  */
 void
 bfa_port_attach(struct bfa_port_s *port, struct bfa_ioc_s *ioc,
 		 void *dev, struct bfa_trc_mod_s *trcmod)
 {
 	struct timeval tv;

 	WARN_ON(!port);

 	port->dev    = dev;
 	port->ioc    = ioc;
 	port->trcmod = trcmod;

 	port->stats_busy = BFA_FALSE;
 	port->endis_pending = BFA_FALSE;
 	port->stats_cbfn = NULL;
 	port->endis_cbfn = NULL;
 	port->pbc_disabled = BFA_FALSE;

 	bfa_ioc_mbox_regisr(port->ioc, BFI_MC_PORT, bfa_port_isr, port);
 	bfa_ioc_notify_init(&port->ioc_notify, bfa_port_notify, port);
 	list_add_tail(&port->ioc_notify.qe, &port->ioc->notify_q);

 	/*
 	 * initialize time stamp for stats reset
 	 */
 	do_gettimeofday(&tv);
 	port->stats_reset_time = tv.tv_sec;

 	bfa_trc(port, 0);
 }
	/*
	* 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_defs_svc.h"
	#include "bfa_port.h"
	#include "bfi.h"
	#include "bfa_ioc.h"


	BFA_TRC_FILE(CNA, PORT);

	static void
	bfa_port_stats_swap(struct bfa_port_s port, union bfa_port_stats_u stats)
	{
	u32 dip = (u32 ) stats;
	__be32 t0, t1;
	int i;

	for (i = 0; i < sizeof(union bfa_port_stats_u)/sizeof(u32);
	i += 2) {
	t0 = dip[i];
	t1 = dip[i + 1];
	#ifdef __BIG_ENDIAN
	dip[i] = be32_to_cpu(t0);
	dip[i + 1] = be32_to_cpu(t1);
	#else
	dip[i] = be32_to_cpu(t1);
	dip[i + 1] = be32_to_cpu(t0);
	#endif
	}
	}

	/*
	* bfa_port_enable_isr()
	*
	*
	* @param[in] port - Pointer to the port module
	* status - Return status from the f/w
	*
	* @return void
	*/
	static void
	bfa_port_enable_isr(struct bfa_port_s *port, bfa_status_t status)
	{
	bfa_trc(port, status);
	port->endis_pending = BFA_FALSE;
	port->endis_cbfn(port->endis_cbarg, status);
	}

	/*
	* bfa_port_disable_isr()
	*
	*
	* @param[in] port - Pointer to the port module
	* status - Return status from the f/w
	*
	* @return void
	*/
	static void
	bfa_port_disable_isr(struct bfa_port_s *port, bfa_status_t status)
	{
	bfa_trc(port, status);
	port->endis_pending = BFA_FALSE;
	port->endis_cbfn(port->endis_cbarg, status);
	}

	/*
	* bfa_port_get_stats_isr()
	*
	*
	* @param[in] port - Pointer to the Port module
	* status - Return status from the f/w
	*
	* @return void
	*/
	static void
	bfa_port_get_stats_isr(struct bfa_port_s *port, bfa_status_t status)
	{
	port->stats_status = status;
	port->stats_busy = BFA_FALSE;

	if (status == BFA_STATUS_OK) {
	struct timeval tv;

	memcpy(port->stats, port->stats_dma.kva,
	sizeof(union bfa_port_stats_u));
	bfa_port_stats_swap(port, port->stats);

	do_gettimeofday(&tv);
	port->stats->fc.secs_reset = tv.tv_sec - port->stats_reset_time;
	}

	if (port->stats_cbfn) {
	port->stats_cbfn(port->stats_cbarg, status);
	port->stats_cbfn = NULL;
	}
	}

	/*
	* bfa_port_clear_stats_isr()
	*
	*
	* @param[in] port - Pointer to the Port module
	* status - Return status from the f/w
	*
	* @return void
	*/
	static void
	bfa_port_clear_stats_isr(struct bfa_port_s *port, bfa_status_t status)
	{
	struct timeval tv;

	port->stats_status = status;
	port->stats_busy = BFA_FALSE;

	/*
	* re-initialize time stamp for stats reset
	*/
	do_gettimeofday(&tv);
	port->stats_reset_time = tv.tv_sec;

	if (port->stats_cbfn) {
	port->stats_cbfn(port->stats_cbarg, status);
	port->stats_cbfn = NULL;
	}
	}

	/*
	* bfa_port_isr()
	*
	*
	* @param[in] Pointer to the Port module data structure.
	*
	* @return void
	*/
	static void
	bfa_port_isr(void cbarg, struct bfi_mbmsg_s m)
	{
	struct bfa_port_s port = (struct bfa_port_s ) cbarg;
	union bfi_port_i2h_msg_u *i2hmsg;

	i2hmsg = (union bfi_port_i2h_msg_u *) m;
	bfa_trc(port, m->mh.msg_id);

	switch (m->mh.msg_id) {
	case BFI_PORT_I2H_ENABLE_RSP:
	if (port->endis_pending == BFA_FALSE)
	break;
	bfa_port_enable_isr(port, i2hmsg->enable_rsp.status);
	break;

	case BFI_PORT_I2H_DISABLE_RSP:
	if (port->endis_pending == BFA_FALSE)
	break;
	bfa_port_disable_isr(port, i2hmsg->disable_rsp.status);
	break;

	case BFI_PORT_I2H_GET_STATS_RSP:
	/* Stats busy flag is still set? (may be cmd timed out) */
	if (port->stats_busy == BFA_FALSE)
	break;
	bfa_port_get_stats_isr(port, i2hmsg->getstats_rsp.status);
	break;

	case BFI_PORT_I2H_CLEAR_STATS_RSP:
	if (port->stats_busy == BFA_FALSE)
	break;
	bfa_port_clear_stats_isr(port, i2hmsg->clearstats_rsp.status);
	break;

	default:
	WARN_ON(1);
	}
	}

	/*
	* bfa_port_meminfo()
	*
	*
	* @param[in] void
	*
	* @return Size of DMA region
	*/
	u32
	bfa_port_meminfo(void)
	{
	return BFA_ROUNDUP(sizeof(union bfa_port_stats_u), BFA_DMA_ALIGN_SZ);
	}

	/*
	* bfa_port_mem_claim()
	*
	*
	* @param[in] port Port module pointer
	* dma_kva Kernel Virtual Address of Port DMA Memory
	* dma_pa Physical Address of Port DMA Memory
	*
	* @return void
	*/
	void
	bfa_port_mem_claim(struct bfa_port_s port, u8 dma_kva, u64 dma_pa)
	{
	port->stats_dma.kva = dma_kva;
	port->stats_dma.pa = dma_pa;
	}

	/*
	* bfa_port_enable()
	*
	* Send the Port enable request to the f/w
	*
	* @param[in] Pointer to the Port module data structure.
	*
	* @return Status
	*/
	bfa_status_t
	bfa_port_enable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
	void *cbarg)
	{
	struct bfi_port_generic_req_s *m;

	/* If port is PBC disabled, return error */
	if (port->pbc_disabled) {
	bfa_trc(port, BFA_STATUS_PBC);
	return BFA_STATUS_PBC;
	}

	if (bfa_ioc_is_disabled(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_DISABLED);
	return BFA_STATUS_IOC_DISABLED;
	}

	if (!bfa_ioc_is_operational(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_FAILURE);
	return BFA_STATUS_IOC_FAILURE;
	}

	if (port->endis_pending) {
	bfa_trc(port, BFA_STATUS_DEVBUSY);
	return BFA_STATUS_DEVBUSY;
	}

	m = (struct bfi_port_generic_req_s *) port->endis_mb.msg;

	port->msgtag++;
	port->endis_cbfn = cbfn;
	port->endis_cbarg = cbarg;
	port->endis_pending = BFA_TRUE;

	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_ENABLE_REQ,
	bfa_ioc_portid(port->ioc));
	bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);

	return BFA_STATUS_OK;
	}

	/*
	* bfa_port_disable()
	*
	* Send the Port disable request to the f/w
	*
	* @param[in] Pointer to the Port module data structure.
	*
	* @return Status
	*/
	bfa_status_t
	bfa_port_disable(struct bfa_port_s *port, bfa_port_endis_cbfn_t cbfn,
	void *cbarg)
	{
	struct bfi_port_generic_req_s *m;

	/* If port is PBC disabled, return error */
	if (port->pbc_disabled) {
	bfa_trc(port, BFA_STATUS_PBC);
	return BFA_STATUS_PBC;
	}

	if (bfa_ioc_is_disabled(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_DISABLED);
	return BFA_STATUS_IOC_DISABLED;
	}

	if (!bfa_ioc_is_operational(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_FAILURE);
	return BFA_STATUS_IOC_FAILURE;
	}

	if (port->endis_pending) {
	bfa_trc(port, BFA_STATUS_DEVBUSY);
	return BFA_STATUS_DEVBUSY;
	}

	m = (struct bfi_port_generic_req_s *) port->endis_mb.msg;

	port->msgtag++;
	port->endis_cbfn = cbfn;
	port->endis_cbarg = cbarg;
	port->endis_pending = BFA_TRUE;

	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_DISABLE_REQ,
	bfa_ioc_portid(port->ioc));
	bfa_ioc_mbox_queue(port->ioc, &port->endis_mb);

	return BFA_STATUS_OK;
	}

	/*
	* bfa_port_get_stats()
	*
	* Send the request to the f/w to fetch Port statistics.
	*
	* @param[in] Pointer to the Port module data structure.
	*
	* @return Status
	*/
	bfa_status_t
	bfa_port_get_stats(struct bfa_port_s port, union bfa_port_stats_u stats,
	bfa_port_stats_cbfn_t cbfn, void *cbarg)
	{
	struct bfi_port_get_stats_req_s *m;

	if (!bfa_ioc_is_operational(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_FAILURE);
	return BFA_STATUS_IOC_FAILURE;
	}

	if (port->stats_busy) {
	bfa_trc(port, BFA_STATUS_DEVBUSY);
	return BFA_STATUS_DEVBUSY;
	}

	m = (struct bfi_port_get_stats_req_s *) port->stats_mb.msg;

	port->stats = stats;
	port->stats_cbfn = cbfn;
	port->stats_cbarg = cbarg;
	port->stats_busy = BFA_TRUE;
	bfa_dma_be_addr_set(m->dma_addr, port->stats_dma.pa);

	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_GET_STATS_REQ,
	bfa_ioc_portid(port->ioc));
	bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);

	return BFA_STATUS_OK;
	}

	/*
	* bfa_port_clear_stats()
	*
	*
	* @param[in] Pointer to the Port module data structure.
	*
	* @return Status
	*/
	bfa_status_t
	bfa_port_clear_stats(struct bfa_port_s *port, bfa_port_stats_cbfn_t cbfn,
	void *cbarg)
	{
	struct bfi_port_generic_req_s *m;

	if (!bfa_ioc_is_operational(port->ioc)) {
	bfa_trc(port, BFA_STATUS_IOC_FAILURE);
	return BFA_STATUS_IOC_FAILURE;
	}

	if (port->stats_busy) {
	bfa_trc(port, BFA_STATUS_DEVBUSY);
	return BFA_STATUS_DEVBUSY;
	}

	m = (struct bfi_port_generic_req_s *) port->stats_mb.msg;

	port->stats_cbfn = cbfn;
	port->stats_cbarg = cbarg;
	port->stats_busy = BFA_TRUE;

	bfi_h2i_set(m->mh, BFI_MC_PORT, BFI_PORT_H2I_CLEAR_STATS_REQ,
	bfa_ioc_portid(port->ioc));
	bfa_ioc_mbox_queue(port->ioc, &port->stats_mb);

	return BFA_STATUS_OK;
	}

	/*
	* bfa_port_notify()
	*
	* Port module IOC event handler
	*
	* @param[in] Pointer to the Port module data structure.
	* @param[in] IOC event structure
	*
	* @return void
	*/
	void
	bfa_port_notify(void *arg, enum bfa_ioc_event_e event)
	{
	struct bfa_port_s port = (struct bfa_port_s ) arg;

	switch (event) {
	case BFA_IOC_E_DISABLED:
	case BFA_IOC_E_FAILED:
	/* Fail any pending get_stats/clear_stats requests */
	if (port->stats_busy) {
	if (port->stats_cbfn)
	port->stats_cbfn(port->stats_cbarg,
	BFA_STATUS_FAILED);
	port->stats_cbfn = NULL;
	port->stats_busy = BFA_FALSE;
	}

	/* Clear any enable/disable is pending */
	if (port->endis_pending) {
	if (port->endis_cbfn)
	port->endis_cbfn(port->endis_cbarg,
	BFA_STATUS_FAILED);
	port->endis_cbfn = NULL;
	port->endis_pending = BFA_FALSE;
	}
	break;
	default:
	break;
	}
	}

	/*
	* bfa_port_attach()
	*
	*
	* @param[in] port - Pointer to the Port module data structure
	* ioc - Pointer to the ioc module data structure
	* dev - Pointer to the device driver module data structure
	* The device driver specific mbox ISR functions have
	* this pointer as one of the parameters.
	* trcmod -
	*
	* @return void
	*/
	void
	bfa_port_attach(struct bfa_port_s port, struct bfa_ioc_s ioc,
	void dev, struct bfa_trc_mod_s trcmod)
	{
	struct timeval tv;

	WARN_ON(!port);

	port->dev = dev;
	port->ioc = ioc;
	port->trcmod = trcmod;

	port->stats_busy = BFA_FALSE;
	port->endis_pending = BFA_FALSE;
	port->stats_cbfn = NULL;
	port->endis_cbfn = NULL;
	port->pbc_disabled = BFA_FALSE;

	bfa_ioc_mbox_regisr(port->ioc, BFI_MC_PORT, bfa_port_isr, port);
	bfa_ioc_notify_init(&port->ioc_notify, bfa_port_notify, port);
	list_add_tail(&port->ioc_notify.qe, &port->ioc->notify_q);

	/*
	* initialize time stamp for stats reset
	*/
	do_gettimeofday(&tv);
	port->stats_reset_time = tv.tv_sec;

	bfa_trc(port, 0);
	}