linux/drivers/net/bna/bnad.c

/*
 * Linux network driver for Brocade Converged Network 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.
 */
/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 */
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/in.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/if_ether.h>
#include <linux/ip.h>

#include "bnad.h"
#include "bna.h"
#include "cna.h"

static DEFINE_MUTEX(bnad_fwimg_mutex);

/*
 * Module params
 */
static uint bnad_msix_disable;
module_param(bnad_msix_disable, uint, 0444);
MODULE_PARM_DESC(bnad_msix_disable, "Disable MSIX mode");

static uint bnad_ioc_auto_recover = 1;
module_param(bnad_ioc_auto_recover, uint, 0444);
MODULE_PARM_DESC(bnad_ioc_auto_recover, "Enable / Disable auto recovery");

/*
 * Global variables
 */
u32 bnad_rxqs_per_cq = 2;

static const u8 bnad_bcast_addr[] =  {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

/*
 * Local MACROS
 */
#define BNAD_TX_UNMAPQ_DEPTH (bnad->txq_depth * 2)

#define BNAD_RX_UNMAPQ_DEPTH (bnad->rxq_depth)

#define BNAD_GET_MBOX_IRQ(_bnad)				\
	(((_bnad)->cfg_flags & BNAD_CF_MSIX) ?			\
	 ((_bnad)->msix_table[(_bnad)->msix_num - 1].vector) : 	\
	 ((_bnad)->pcidev->irq))

#define BNAD_FILL_UNMAPQ_MEM_REQ(_res_info, _num, _depth)	\
do {								\
	(_res_info)->res_type = BNA_RES_T_MEM;			\
	(_res_info)->res_u.mem_info.mem_type = BNA_MEM_T_KVA;	\
	(_res_info)->res_u.mem_info.num = (_num);		\
	(_res_info)->res_u.mem_info.len =			\
	sizeof(struct bnad_unmap_q) +				\
	(sizeof(struct bnad_skb_unmap) * ((_depth) - 1));	\
} while (0)

#define BNAD_TXRX_SYNC_MDELAY	250	/* 250 msecs */

/*
 * Reinitialize completions in CQ, once Rx is taken down
 */
static void
bnad_cq_cmpl_init(struct bnad *bnad, struct bna_ccb *ccb)
{
	struct bna_cq_entry *cmpl, *next_cmpl;
	unsigned int wi_range, wis = 0, ccb_prod = 0;
	int i;

	BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt, cmpl,
			    wi_range);

	for (i = 0; i < ccb->q_depth; i++) {
		wis++;
		if (likely(--wi_range))
			next_cmpl = cmpl + 1;
		else {
			BNA_QE_INDX_ADD(ccb_prod, wis, ccb->q_depth);
			wis = 0;
			BNA_CQ_QPGE_PTR_GET(ccb_prod, ccb->sw_qpt,
						next_cmpl, wi_range);
		}
		cmpl->valid = 0;
		cmpl = next_cmpl;
	}
}

/*
 * Frees all pending Tx Bufs
 * At this point no activity is expected on the Q,
 * so DMA unmap & freeing is fine.
 */
static void
bnad_free_all_txbufs(struct bnad *bnad,
		 struct bna_tcb *tcb)
{
	u16 		unmap_cons;
	struct bnad_unmap_q *unmap_q = tcb->unmap_q;
	struct bnad_skb_unmap *unmap_array;
	struct sk_buff 		*skb = NULL;
	int			i;

	unmap_array = unmap_q->unmap_array;

	unmap_cons = 0;
	while (unmap_cons < unmap_q->q_depth) {
		skb = unmap_array[unmap_cons].skb;
		if (!skb) {
			unmap_cons++;
			continue;
		}
		unmap_array[unmap_cons].skb = NULL;

		pci_unmap_single(bnad->pcidev,
				 pci_unmap_addr(&unmap_array[unmap_cons],
						dma_addr), skb_headlen(skb),
						PCI_DMA_TODEVICE);

		pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, 0);
		if (++unmap_cons >= unmap_q->q_depth)
			break;

		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
			pci_unmap_page(bnad->pcidev,
				       pci_unmap_addr(&unmap_array[unmap_cons],
						      dma_addr),
				       skb_shinfo(skb)->frags[i].size,
				       PCI_DMA_TODEVICE);
			pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr,
					   0);
			if (++unmap_cons >= unmap_q->q_depth)
				break;
		}
		dev_kfree_skb_any(skb);
	}
}

/* Data Path Handlers */

/*
 * bnad_free_txbufs : Frees the Tx bufs on Tx completion
 * Can be called in a) Interrupt context
 *		    b) Sending context
 *		    c) Tasklet context
 */
static u32
bnad_free_txbufs(struct bnad *bnad,
		 struct bna_tcb *tcb)
{
	u32 		sent_packets = 0, sent_bytes = 0;
	u16 		wis, unmap_cons, updated_hw_cons;
	struct bnad_unmap_q *unmap_q = tcb->unmap_q;
	struct bnad_skb_unmap *unmap_array;
	struct sk_buff 		*skb;
	int i;

	/*
	 * Just return if TX is stopped. This check is useful
	 * when bnad_free_txbufs() runs out of a tasklet scheduled
	 * before bnad_cb_tx_cleanup() cleared BNAD_TXQ_TX_STARTED bit
	 * but this routine runs actually after the cleanup has been
	 * executed.
	 */
	if (!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))
		return 0;

	updated_hw_cons = *(tcb->hw_consumer_index);

	wis = BNA_Q_INDEX_CHANGE(tcb->consumer_index,
				  updated_hw_cons, tcb->q_depth);

	BUG_ON(!(wis <= BNA_QE_IN_USE_CNT(tcb, tcb->q_depth)));

	unmap_array = unmap_q->unmap_array;
	unmap_cons = unmap_q->consumer_index;

	prefetch(&unmap_array[unmap_cons + 1]);
	while (wis) {
		skb = unmap_array[unmap_cons].skb;

		unmap_array[unmap_cons].skb = NULL;

		sent_packets++;
		sent_bytes += skb->len;
		wis -= BNA_TXQ_WI_NEEDED(1 + skb_shinfo(skb)->nr_frags);

		pci_unmap_single(bnad->pcidev,
				 pci_unmap_addr(&unmap_array[unmap_cons],
						dma_addr), skb_headlen(skb),
				 PCI_DMA_TODEVICE);
		pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, 0);
		BNA_QE_INDX_ADD(unmap_cons, 1, unmap_q->q_depth);

		prefetch(&unmap_array[unmap_cons + 1]);
		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
			prefetch(&unmap_array[unmap_cons + 1]);

			pci_unmap_page(bnad->pcidev,
				       pci_unmap_addr(&unmap_array[unmap_cons],
						      dma_addr),
				       skb_shinfo(skb)->frags[i].size,
				       PCI_DMA_TODEVICE);
			pci_unmap_addr_set(&unmap_array[unmap_cons], dma_addr,
					   0);
			BNA_QE_INDX_ADD(unmap_cons, 1, unmap_q->q_depth);
		}
		dev_kfree_skb_any(skb);
	}

	/* Update consumer pointers. */
	tcb->consumer_index = updated_hw_cons;
	unmap_q->consumer_index = unmap_cons;

	tcb->txq->tx_packets += sent_packets;
	tcb->txq->tx_bytes += sent_bytes;

	return sent_packets;
}

/* Tx Free Tasklet function */
/* Frees for all the tcb's in all the Tx's */
/*
 * Scheduled from sending context, so that
 * the fat Tx lock is not held for too long
 * in the sending context.
 */
static void
bnad_tx_free_tasklet(unsigned long bnad_ptr)
{
	struct bnad *bnad = (struct bnad *)bnad_ptr;
	struct bna_tcb *tcb;
	u32 		acked;
	int			i, j;

	for (i = 0; i < bnad->num_tx; i++) {
		for (j = 0; j < bnad->num_txq_per_tx; j++) {
			tcb = bnad->tx_info[i].tcb[j];
			if (!tcb)
				continue;
			if (((u16) (*tcb->hw_consumer_index) !=
				tcb->consumer_index) &&
				(!test_and_set_bit(BNAD_TXQ_FREE_SENT,
						  &tcb->flags))) {
				acked = bnad_free_txbufs(bnad, tcb);
				if (likely(test_bit(BNAD_TXQ_TX_STARTED,
					&tcb->flags)))
					bna_ib_ack(tcb->i_dbell, acked);
				smp_mb__before_clear_bit();
				clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
			}
		}
	}
}

static u32
bnad_tx(struct bnad *bnad, struct bna_tcb *tcb)
{
	struct net_device *netdev = bnad->netdev;
	u32 sent = 0;

	if (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
		return 0;

	sent = bnad_free_txbufs(bnad, tcb);
	if (sent) {
		if (netif_queue_stopped(netdev) &&
		    netif_carrier_ok(netdev) &&
		    BNA_QE_FREE_CNT(tcb, tcb->q_depth) >=
				    BNAD_NETIF_WAKE_THRESHOLD) {
			if (test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)) {
				netif_wake_queue(netdev);
				BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
			}
		}
	}

	if (likely(test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
		bna_ib_ack(tcb->i_dbell, sent);

	smp_mb__before_clear_bit();
	clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);

	return sent;
}

/* MSIX Tx Completion Handler */
static irqreturn_t
bnad_msix_tx(int irq, void *data)
{
	struct bna_tcb *tcb = (struct bna_tcb *)data;
	struct bnad *bnad = tcb->bnad;

	bnad_tx(bnad, tcb);

	return IRQ_HANDLED;
}

static void
bnad_reset_rcb(struct bnad *bnad, struct bna_rcb *rcb)
{
	struct bnad_unmap_q *unmap_q = rcb->unmap_q;

	rcb->producer_index = 0;
	rcb->consumer_index = 0;

	unmap_q->producer_index = 0;
	unmap_q->consumer_index = 0;
}

static void
bnad_free_all_rxbufs(struct bnad *bnad, struct bna_rcb *rcb)
{
	struct bnad_unmap_q *unmap_q;
	struct sk_buff *skb;
	int unmap_cons;

	unmap_q = rcb->unmap_q;
	for (unmap_cons = 0; unmap_cons < unmap_q->q_depth; unmap_cons++) {
		skb = unmap_q->unmap_array[unmap_cons].skb;
		if (!skb)
			continue;
		BUG_ON(!(pci_unmap_addr(
			&unmap_q->unmap_array[unmap_cons], dma_addr)));
		unmap_q->unmap_array[unmap_cons].skb = NULL;
		pci_unmap_single(bnad->pcidev, pci_unmap_addr(&unmap_q->
					unmap_array[unmap_cons],
					dma_addr), rcb->rxq->buffer_size,
					PCI_DMA_FROMDEVICE);
		dev_kfree_skb(skb);
	}
	bnad_reset_rcb(bnad, rcb);
}

static void
bnad_alloc_n_post_rxbufs(struct bnad *bnad, struct bna_rcb *rcb)
{
	u16 to_alloc, alloced, unmap_prod, wi_range;
	struct bnad_unmap_q *unmap_q = rcb->unmap_q;
	struct bnad_skb_unmap *unmap_array;
	struct bna_rxq_entry *rxent;
	struct sk_buff *skb;
	dma_addr_t dma_addr;

	alloced = 0;
	to_alloc =
		BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth);

	unmap_array = unmap_q->unmap_array;
	unmap_prod = unmap_q->producer_index;

	BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent, wi_range);

	while (to_alloc--) {
		if (!wi_range) {
			BNA_RXQ_QPGE_PTR_GET(unmap_prod, rcb->sw_qpt, rxent,
					     wi_range);
		}
		skb = alloc_skb(rcb->rxq->buffer_size + NET_IP_ALIGN,
				     GFP_ATOMIC);
		if (unlikely(!skb)) {
			BNAD_UPDATE_CTR(bnad, rxbuf_alloc_failed);
			goto finishing;
		}
		skb->dev = bnad->netdev;
		skb_reserve(skb, NET_IP_ALIGN);
		unmap_array[unmap_prod].skb = skb;
		dma_addr = pci_map_single(bnad->pcidev, skb->data,
			rcb->rxq->buffer_size, PCI_DMA_FROMDEVICE);
		pci_unmap_addr_set(&unmap_array[unmap_prod], dma_addr,
				   dma_addr);
		BNA_SET_DMA_ADDR(dma_addr, &rxent->host_addr);
		BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);

		rxent++;
		wi_range--;
		alloced++;
	}

finishing:
	if (likely(alloced)) {
		unmap_q->producer_index = unmap_prod;
		rcb->producer_index = unmap_prod;
		smp_mb();
		if (likely(test_bit(BNAD_RXQ_STARTED, &rcb->flags)))
			bna_rxq_prod_indx_doorbell(rcb);
	}
}

static inline void
bnad_refill_rxq(struct bnad *bnad, struct bna_rcb *rcb)
{
	struct bnad_unmap_q *unmap_q = rcb->unmap_q;

	if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) {
		if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth)
			 >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT)
			bnad_alloc_n_post_rxbufs(bnad, rcb);
		smp_mb__before_clear_bit();
		clear_bit(BNAD_RXQ_REFILL, &rcb->flags);
	}
}

static u32
bnad_poll_cq(struct bnad *bnad, struct bna_ccb *ccb, int budget)
{
	struct bna_cq_entry *cmpl, *next_cmpl;
	struct bna_rcb *rcb = NULL;
	unsigned int wi_range, packets = 0, wis = 0;
	struct bnad_unmap_q *unmap_q;
	struct sk_buff *skb;
	u32 flags;
	u32 qid0 = ccb->rcb[0]->rxq->rxq_id;
	struct bna_pkt_rate *pkt_rt = &ccb->pkt_rate;

	if (!test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags))
		return 0;

	prefetch(bnad->netdev);
	BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt, cmpl,
			    wi_range);
	BUG_ON(!(wi_range <= ccb->q_depth));
	while (cmpl->valid && packets < budget) {
		packets++;
		BNA_UPDATE_PKT_CNT(pkt_rt, ntohs(cmpl->length));

		if (qid0 == cmpl->rxq_id)
			rcb = ccb->rcb[0];
		else
			rcb = ccb->rcb[1];

		unmap_q = rcb->unmap_q;

		skb = unmap_q->unmap_array[unmap_q->consumer_index].skb;
		BUG_ON(!(skb));
		unmap_q->unmap_array[unmap_q->consumer_index].skb = NULL;
		pci_unmap_single(bnad->pcidev,
				 pci_unmap_addr(&unmap_q->
						unmap_array[unmap_q->
							    consumer_index],
						dma_addr),
						rcb->rxq->buffer_size,
						PCI_DMA_FROMDEVICE);
		BNA_QE_INDX_ADD(unmap_q->consumer_index, 1, unmap_q->q_depth);

		/* Should be more efficient ? Performance ? */
		BNA_QE_INDX_ADD(rcb->consumer_index, 1, rcb->q_depth);

		wis++;
		if (likely(--wi_range))
			next_cmpl = cmpl + 1;
		else {
			BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth);
			wis = 0;
			BNA_CQ_QPGE_PTR_GET(ccb->producer_index, ccb->sw_qpt,
						next_cmpl, wi_range);
			BUG_ON(!(wi_range <= ccb->q_depth));
		}
		prefetch(next_cmpl);

		flags = ntohl(cmpl->flags);
		if (unlikely
		    (flags &
		     (BNA_CQ_EF_MAC_ERROR | BNA_CQ_EF_FCS_ERROR |
		      BNA_CQ_EF_TOO_LONG))) {
			dev_kfree_skb_any(skb);
			rcb->rxq->rx_packets_with_error++;
			goto next;
		}

		skb_put(skb, ntohs(cmpl->length));
		if (likely
		    (bnad->rx_csum &&
		     (((flags & BNA_CQ_EF_IPV4) &&
		      (flags & BNA_CQ_EF_L3_CKSUM_OK)) ||
		      (flags & BNA_CQ_EF_IPV6)) &&
		      (flags & (BNA_CQ_EF_TCP | BNA_CQ_EF_UDP)) &&
		      (flags & BNA_CQ_EF_L4_CKSUM_OK)))
			skb->ip_summed = CHECKSUM_UNNECESSARY;
		else
			skb_checksum_none_assert(skb);

		rcb->rxq->rx_packets++;
		rcb->rxq->rx_bytes += skb->len;
		skb->protocol = eth_type_trans(skb, bnad->netdev);

		if (bnad->vlan_grp && (flags & BNA_CQ_EF_VLAN)) {
			struct bnad_rx_ctrl *rx_ctrl =
				(struct bnad_rx_ctrl *)ccb->ctrl;
			if (skb->ip_summed == CHECKSUM_UNNECESSARY)
				vlan_gro_receive(&rx_ctrl->napi, bnad->vlan_grp,
						ntohs(cmpl->vlan_tag), skb);
			else
				vlan_hwaccel_receive_skb(skb,
							 bnad->vlan_grp,
							 ntohs(cmpl->vlan_tag));

		} else { /* Not VLAN tagged/stripped */
			struct bnad_rx_ctrl *rx_ctrl =
				(struct bnad_rx_ctrl *)ccb->ctrl;
			if (skb->ip_summed == CHECKSUM_UNNECESSARY)
				napi_gro_receive(&rx_ctrl->napi, skb);
			else
				netif_receive_skb(skb);
		}

next:
		cmpl->valid = 0;
		cmpl = next_cmpl;
	}

	BNA_QE_INDX_ADD(ccb->producer_index, wis, ccb->q_depth);

	if (likely(ccb)) {
		if (likely(test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags)))
			bna_ib_ack(ccb->i_dbell, packets);
		bnad_refill_rxq(bnad, ccb->rcb[0]);
		if (ccb->rcb[1])
			bnad_refill_rxq(bnad, ccb->rcb[1]);
	} else {
		if (likely(test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags)))
			bna_ib_ack(ccb->i_dbell, 0);
	}

	return packets;
}

static void
bnad_disable_rx_irq(struct bnad *bnad, struct bna_ccb *ccb)
{
	if (unlikely(!test_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags)))
		return;

	bna_ib_coalescing_timer_set(ccb->i_dbell, 0);
	bna_ib_ack(ccb->i_dbell, 0);
}

static void
bnad_enable_rx_irq(struct bnad *bnad, struct bna_ccb *ccb)
{
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags); /* Because of polling context */
	bnad_enable_rx_irq_unsafe(ccb);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

static void
bnad_netif_rx_schedule_poll(struct bnad *bnad, struct bna_ccb *ccb)
{
	struct bnad_rx_ctrl *rx_ctrl = (struct bnad_rx_ctrl *)(ccb->ctrl);
	struct napi_struct *napi = &rx_ctrl->napi;

	if (likely(napi_schedule_prep(napi))) {
		bnad_disable_rx_irq(bnad, ccb);
		__napi_schedule(napi);
	}
	BNAD_UPDATE_CTR(bnad, netif_rx_schedule);
}

/* MSIX Rx Path Handler */
static irqreturn_t
bnad_msix_rx(int irq, void *data)
{
	struct bna_ccb *ccb = (struct bna_ccb *)data;
	struct bnad *bnad = ccb->bnad;

	bnad_netif_rx_schedule_poll(bnad, ccb);

	return IRQ_HANDLED;
}

/* Interrupt handlers */

/* Mbox Interrupt Handlers */
static irqreturn_t
bnad_msix_mbox_handler(int irq, void *data)
{
	u32 intr_status;
	unsigned long flags;
	struct bnad *bnad = (struct bnad *)data;

	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)))
		return IRQ_HANDLED;

	spin_lock_irqsave(&bnad->bna_lock, flags);

	bna_intr_status_get(&bnad->bna, intr_status);

	if (BNA_IS_MBOX_ERR_INTR(intr_status))
		bna_mbox_handler(&bnad->bna, intr_status);

	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return IRQ_HANDLED;
}

static irqreturn_t
bnad_isr(int irq, void *data)
{
	int i, j;
	u32 intr_status;
	unsigned long flags;
	struct bnad *bnad = (struct bnad *)data;
	struct bnad_rx_info *rx_info;
	struct bnad_rx_ctrl *rx_ctrl;

	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)))
		return IRQ_NONE;

	bna_intr_status_get(&bnad->bna, intr_status);

	if (unlikely(!intr_status))
		return IRQ_NONE;

	spin_lock_irqsave(&bnad->bna_lock, flags);

	if (BNA_IS_MBOX_ERR_INTR(intr_status))
		bna_mbox_handler(&bnad->bna, intr_status);

	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	if (!BNA_IS_INTX_DATA_INTR(intr_status))
		return IRQ_HANDLED;

	/* Process data interrupts */
	/* Tx processing */
	for (i = 0; i < bnad->num_tx; i++) {
		for (j = 0; j < bnad->num_txq_per_tx; j++)
			bnad_tx(bnad, bnad->tx_info[i].tcb[j]);
	}
	/* Rx processing */
	for (i = 0; i < bnad->num_rx; i++) {
		rx_info = &bnad->rx_info[i];
		if (!rx_info->rx)
			continue;
		for (j = 0; j < bnad->num_rxp_per_rx; j++) {
			rx_ctrl = &rx_info->rx_ctrl[j];
			if (rx_ctrl->ccb)
				bnad_netif_rx_schedule_poll(bnad,
							    rx_ctrl->ccb);
		}
	}
	return IRQ_HANDLED;
}

/*
 * Called in interrupt / callback context
 * with bna_lock held, so cfg_flags access is OK
 */
static void
bnad_enable_mbox_irq(struct bnad *bnad)
{
	clear_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);

	BNAD_UPDATE_CTR(bnad, mbox_intr_enabled);
}

/*
 * Called with bnad->bna_lock held b'cos of
 * bnad->cfg_flags access.
 */
static void
bnad_disable_mbox_irq(struct bnad *bnad)
{
	set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);

	BNAD_UPDATE_CTR(bnad, mbox_intr_disabled);
}

static void
bnad_set_netdev_perm_addr(struct bnad *bnad)
{
	struct net_device *netdev = bnad->netdev;

	memcpy(netdev->perm_addr, &bnad->perm_addr, netdev->addr_len);
	if (is_zero_ether_addr(netdev->dev_addr))
		memcpy(netdev->dev_addr, &bnad->perm_addr, netdev->addr_len);
}

/* Control Path Handlers */

/* Callbacks */
void
bnad_cb_device_enable_mbox_intr(struct bnad *bnad)
{
	bnad_enable_mbox_irq(bnad);
}

void
bnad_cb_device_disable_mbox_intr(struct bnad *bnad)
{
	bnad_disable_mbox_irq(bnad);
}

void
bnad_cb_device_enabled(struct bnad *bnad, enum bna_cb_status status)
{
	complete(&bnad->bnad_completions.ioc_comp);
	bnad->bnad_completions.ioc_comp_status = status;
}

void
bnad_cb_device_disabled(struct bnad *bnad, enum bna_cb_status status)
{
	complete(&bnad->bnad_completions.ioc_comp);
	bnad->bnad_completions.ioc_comp_status = status;
}

static void
bnad_cb_port_disabled(void *arg, enum bna_cb_status status)
{
	struct bnad *bnad = (struct bnad *)arg;

	complete(&bnad->bnad_completions.port_comp);

	netif_carrier_off(bnad->netdev);
}

void
bnad_cb_port_link_status(struct bnad *bnad,
			enum bna_link_status link_status)
{
	bool link_up = 0;

	link_up = (link_status == BNA_LINK_UP) || (link_status == BNA_CEE_UP);

	if (link_status == BNA_CEE_UP) {
		set_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags);
		BNAD_UPDATE_CTR(bnad, cee_up);
	} else
		clear_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags);

	if (link_up) {
		if (!netif_carrier_ok(bnad->netdev)) {
			struct bna_tcb *tcb = bnad->tx_info[0].tcb[0];
			if (!tcb)
				return;
			pr_warn("bna: %s link up\n",
				bnad->netdev->name);
			netif_carrier_on(bnad->netdev);
			BNAD_UPDATE_CTR(bnad, link_toggle);
			if (test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)) {
				/* Force an immediate Transmit Schedule */
				pr_info("bna: %s TX_STARTED\n",
					bnad->netdev->name);
				netif_wake_queue(bnad->netdev);
				BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
			} else {
				netif_stop_queue(bnad->netdev);
				BNAD_UPDATE_CTR(bnad, netif_queue_stop);
			}
		}
	} else {
		if (netif_carrier_ok(bnad->netdev)) {
			pr_warn("bna: %s link down\n",
				bnad->netdev->name);
			netif_carrier_off(bnad->netdev);
			BNAD_UPDATE_CTR(bnad, link_toggle);
		}
	}
}

static void
bnad_cb_tx_disabled(void *arg, struct bna_tx *tx,
			enum bna_cb_status status)
{
	struct bnad *bnad = (struct bnad *)arg;

	complete(&bnad->bnad_completions.tx_comp);
}

static void
bnad_cb_tcb_setup(struct bnad *bnad, struct bna_tcb *tcb)
{
	struct bnad_tx_info *tx_info =
			(struct bnad_tx_info *)tcb->txq->tx->priv;
	struct bnad_unmap_q *unmap_q = tcb->unmap_q;

	tx_info->tcb[tcb->id] = tcb;
	unmap_q->producer_index = 0;
	unmap_q->consumer_index = 0;
	unmap_q->q_depth = BNAD_TX_UNMAPQ_DEPTH;
}

static void
bnad_cb_tcb_destroy(struct bnad *bnad, struct bna_tcb *tcb)
{
	struct bnad_tx_info *tx_info =
			(struct bnad_tx_info *)tcb->txq->tx->priv;
	struct bnad_unmap_q *unmap_q = tcb->unmap_q;

	while (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
		cpu_relax();

	bnad_free_all_txbufs(bnad, tcb);

	unmap_q->producer_index = 0;
	unmap_q->consumer_index = 0;

	smp_mb__before_clear_bit();
	clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);

	tx_info->tcb[tcb->id] = NULL;
}

static void
bnad_cb_rcb_setup(struct bnad *bnad, struct bna_rcb *rcb)
{
	struct bnad_unmap_q *unmap_q = rcb->unmap_q;

	unmap_q->producer_index = 0;
	unmap_q->consumer_index = 0;
	unmap_q->q_depth = BNAD_RX_UNMAPQ_DEPTH;
}

static void
bnad_cb_rcb_destroy(struct bnad *bnad, struct bna_rcb *rcb)
{
	bnad_free_all_rxbufs(bnad, rcb);
}

static void
bnad_cb_ccb_setup(struct bnad *bnad, struct bna_ccb *ccb)
{
	struct bnad_rx_info *rx_info =
			(struct bnad_rx_info *)ccb->cq->rx->priv;

	rx_info->rx_ctrl[ccb->id].ccb = ccb;
	ccb->ctrl = &rx_info->rx_ctrl[ccb->id];
}

static void
bnad_cb_ccb_destroy(struct bnad *bnad, struct bna_ccb *ccb)
{
	struct bnad_rx_info *rx_info =
			(struct bnad_rx_info *)ccb->cq->rx->priv;

	rx_info->rx_ctrl[ccb->id].ccb = NULL;
}

static void
bnad_cb_tx_stall(struct bnad *bnad, struct bna_tcb *tcb)
{
	struct bnad_tx_info *tx_info =
			(struct bnad_tx_info *)tcb->txq->tx->priv;

	if (tx_info != &bnad->tx_info[0])
		return;

	clear_bit(BNAD_TXQ_TX_STARTED, &tcb->flags);
	netif_stop_queue(bnad->netdev);
	pr_info("bna: %s TX_STOPPED\n", bnad->netdev->name);
}

static void
bnad_cb_tx_resume(struct bnad *bnad, struct bna_tcb *tcb)
{
	struct bnad_unmap_q *unmap_q = tcb->unmap_q;

	if (test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))
		return;

	clear_bit(BNAD_RF_TX_SHUTDOWN_DELAYED, &bnad->run_flags);

	while (test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags))
		cpu_relax();

	bnad_free_all_txbufs(bnad, tcb);

	unmap_q->producer_index = 0;
	unmap_q->consumer_index = 0;

	smp_mb__before_clear_bit();
	clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);

	/*
	 * Workaround for first device enable failure & we
	 * get a 0 MAC address. We try to get the MAC address
	 * again here.
	 */
	if (is_zero_ether_addr(&bnad->perm_addr.mac[0])) {
		bna_port_mac_get(&bnad->bna.port, &bnad->perm_addr);
		bnad_set_netdev_perm_addr(bnad);
	}

	set_bit(BNAD_TXQ_TX_STARTED, &tcb->flags);

	if (netif_carrier_ok(bnad->netdev)) {
		pr_info("bna: %s TX_STARTED\n", bnad->netdev->name);
		netif_wake_queue(bnad->netdev);
		BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
	}
}

static void
bnad_cb_tx_cleanup(struct bnad *bnad, struct bna_tcb *tcb)
{
	/* Delay only once for the whole Tx Path Shutdown */
	if (!test_and_set_bit(BNAD_RF_TX_SHUTDOWN_DELAYED, &bnad->run_flags))
		mdelay(BNAD_TXRX_SYNC_MDELAY);
}

static void
bnad_cb_rx_cleanup(struct bnad *bnad,
			struct bna_ccb *ccb)
{
	clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[0]->flags);

	if (ccb->rcb[1])
		clear_bit(BNAD_RXQ_STARTED, &ccb->rcb[1]->flags);

	if (!test_and_set_bit(BNAD_RF_RX_SHUTDOWN_DELAYED, &bnad->run_flags))
		mdelay(BNAD_TXRX_SYNC_MDELAY);
}

static void
bnad_cb_rx_post(struct bnad *bnad, struct bna_rcb *rcb)
{
	struct bnad_unmap_q *unmap_q = rcb->unmap_q;

	clear_bit(BNAD_RF_RX_SHUTDOWN_DELAYED, &bnad->run_flags);

	if (rcb == rcb->cq->ccb->rcb[0])
		bnad_cq_cmpl_init(bnad, rcb->cq->ccb);

	bnad_free_all_rxbufs(bnad, rcb);

	set_bit(BNAD_RXQ_STARTED, &rcb->flags);

	/* Now allocate & post buffers for this RCB */
	/* !!Allocation in callback context */
	if (!test_and_set_bit(BNAD_RXQ_REFILL, &rcb->flags)) {
		if (BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth)
			 >> BNAD_RXQ_REFILL_THRESHOLD_SHIFT)
			bnad_alloc_n_post_rxbufs(bnad, rcb);
		smp_mb__before_clear_bit();
		clear_bit(BNAD_RXQ_REFILL, &rcb->flags);
	}
}

static void
bnad_cb_rx_disabled(void *arg, struct bna_rx *rx,
			enum bna_cb_status status)
{
	struct bnad *bnad = (struct bnad *)arg;

	complete(&bnad->bnad_completions.rx_comp);
}

static void
bnad_cb_rx_mcast_add(struct bnad *bnad, struct bna_rx *rx,
				enum bna_cb_status status)
{
	bnad->bnad_completions.mcast_comp_status = status;
	complete(&bnad->bnad_completions.mcast_comp);
}

void
bnad_cb_stats_get(struct bnad *bnad, enum bna_cb_status status,
		       struct bna_stats *stats)
{
	if (status == BNA_CB_SUCCESS)
		BNAD_UPDATE_CTR(bnad, hw_stats_updates);

	if (!netif_running(bnad->netdev) ||
		!test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
		return;

	mod_timer(&bnad->stats_timer,
		  jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ));
}

/* Resource allocation, free functions */

static void
bnad_mem_free(struct bnad *bnad,
	      struct bna_mem_info *mem_info)
{
	int i;
	dma_addr_t dma_pa;

	if (mem_info->mdl == NULL)
		return;

	for (i = 0; i < mem_info->num; i++) {
		if (mem_info->mdl[i].kva != NULL) {
			if (mem_info->mem_type == BNA_MEM_T_DMA) {
				BNA_GET_DMA_ADDR(&(mem_info->mdl[i].dma),
						dma_pa);
				pci_free_consistent(bnad->pcidev,
						mem_info->mdl[i].len,
						mem_info->mdl[i].kva, dma_pa);
			} else
				kfree(mem_info->mdl[i].kva);
		}
	}
	kfree(mem_info->mdl);
	mem_info->mdl = NULL;
}

static int
bnad_mem_alloc(struct bnad *bnad,
	       struct bna_mem_info *mem_info)
{
	int i;
	dma_addr_t dma_pa;

	if ((mem_info->num == 0) || (mem_info->len == 0)) {
		mem_info->mdl = NULL;
		return 0;
	}

	mem_info->mdl = kcalloc(mem_info->num, sizeof(struct bna_mem_descr),
				GFP_KERNEL);
	if (mem_info->mdl == NULL)
		return -ENOMEM;

	if (mem_info->mem_type == BNA_MEM_T_DMA) {
		for (i = 0; i < mem_info->num; i++) {
			mem_info->mdl[i].len = mem_info->len;
			mem_info->mdl[i].kva =
				pci_alloc_consistent(bnad->pcidev,
						mem_info->len, &dma_pa);

			if (mem_info->mdl[i].kva == NULL)
				goto err_return;

			BNA_SET_DMA_ADDR(dma_pa,
					 &(mem_info->mdl[i].dma));
		}
	} else {
		for (i = 0; i < mem_info->num; i++) {
			mem_info->mdl[i].len = mem_info->len;
			mem_info->mdl[i].kva = kzalloc(mem_info->len,
							GFP_KERNEL);
			if (mem_info->mdl[i].kva == NULL)
				goto err_return;
		}
	}

	return 0;

err_return:
	bnad_mem_free(bnad, mem_info);
	return -ENOMEM;
}

/* Free IRQ for Mailbox */
static void
bnad_mbox_irq_free(struct bnad *bnad,
		   struct bna_intr_info *intr_info)
{
	int irq;
	unsigned long flags;

	if (intr_info->idl == NULL)
		return;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bnad_disable_mbox_irq(bnad);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	irq = BNAD_GET_MBOX_IRQ(bnad);
	free_irq(irq, bnad);

	kfree(intr_info->idl);
}

/*
 * Allocates IRQ for Mailbox, but keep it disabled
 * This will be enabled once we get the mbox enable callback
 * from bna
 */
static int
bnad_mbox_irq_alloc(struct bnad *bnad,
		    struct bna_intr_info *intr_info)
{
	int 		err = 0;
	unsigned long 	flags;
	u32	irq;
	irq_handler_t 	irq_handler;

	/* Mbox should use only 1 vector */

	intr_info->idl = kzalloc(sizeof(*(intr_info->idl)), GFP_KERNEL);
	if (!intr_info->idl)
		return -ENOMEM;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (bnad->cfg_flags & BNAD_CF_MSIX) {
		irq_handler = (irq_handler_t)bnad_msix_mbox_handler;
		irq = bnad->msix_table[bnad->msix_num - 1].vector;
		flags = 0;
		intr_info->intr_type = BNA_INTR_T_MSIX;
		intr_info->idl[0].vector = bnad->msix_num - 1;
	} else {
		irq_handler = (irq_handler_t)bnad_isr;
		irq = bnad->pcidev->irq;
		flags = IRQF_SHARED;
		intr_info->intr_type = BNA_INTR_T_INTX;
		/* intr_info->idl.vector = 0 ? */
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	sprintf(bnad->mbox_irq_name, "%s", BNAD_NAME);

	/*
	 * Set the Mbox IRQ disable flag, so that the IRQ handler
	 * called from request_irq() for SHARED IRQs do not execute
	 */
	set_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags);

	BNAD_UPDATE_CTR(bnad, mbox_intr_disabled);

	err = request_irq(irq, irq_handler, flags,
			  bnad->mbox_irq_name, bnad);

	if (err) {
		kfree(intr_info->idl);
		intr_info->idl = NULL;
	}

	return err;
}

static void
bnad_txrx_irq_free(struct bnad *bnad, struct bna_intr_info *intr_info)
{
	kfree(intr_info->idl);
	intr_info->idl = NULL;
}

/* Allocates Interrupt Descriptor List for MSIX/INT-X vectors */
static int
bnad_txrx_irq_alloc(struct bnad *bnad, enum bnad_intr_source src,
		    uint txrx_id, struct bna_intr_info *intr_info)
{
	int i, vector_start = 0;
	u32 cfg_flags;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	cfg_flags = bnad->cfg_flags;
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	if (cfg_flags & BNAD_CF_MSIX) {
		intr_info->intr_type = BNA_INTR_T_MSIX;
		intr_info->idl = kcalloc(intr_info->num,
					sizeof(struct bna_intr_descr),
					GFP_KERNEL);
		if (!intr_info->idl)
			return -ENOMEM;

		switch (src) {
		case BNAD_INTR_TX:
			vector_start = txrx_id;
			break;

		case BNAD_INTR_RX:
			vector_start = bnad->num_tx * bnad->num_txq_per_tx +
					txrx_id;
			break;

		default:
			BUG();
		}

		for (i = 0; i < intr_info->num; i++)
			intr_info->idl[i].vector = vector_start + i;
	} else {
		intr_info->intr_type = BNA_INTR_T_INTX;
		intr_info->num = 1;
		intr_info->idl = kcalloc(intr_info->num,
					sizeof(struct bna_intr_descr),
					GFP_KERNEL);
		if (!intr_info->idl)
			return -ENOMEM;

		switch (src) {
		case BNAD_INTR_TX:
			intr_info->idl[0].vector = 0x1; /* Bit mask : Tx IB */
			break;

		case BNAD_INTR_RX:
			intr_info->idl[0].vector = 0x2; /* Bit mask : Rx IB */
			break;
		}
	}
	return 0;
}

/**
 * NOTE: Should be called for MSIX only
 * Unregisters Tx MSIX vector(s) from the kernel
 */
static void
bnad_tx_msix_unregister(struct bnad *bnad, struct bnad_tx_info *tx_info,
			int num_txqs)
{
	int i;
	int vector_num;

	for (i = 0; i < num_txqs; i++) {
		if (tx_info->tcb[i] == NULL)
			continue;

		vector_num = tx_info->tcb[i]->intr_vector;
		free_irq(bnad->msix_table[vector_num].vector, tx_info->tcb[i]);
	}
}

/**
 * NOTE: Should be called for MSIX only
 * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel
 */
static int
bnad_tx_msix_register(struct bnad *bnad, struct bnad_tx_info *tx_info,
			uint tx_id, int num_txqs)
{
	int i;
	int err;
	int vector_num;

	for (i = 0; i < num_txqs; i++) {
		vector_num = tx_info->tcb[i]->intr_vector;
		sprintf(tx_info->tcb[i]->name, "%s TXQ %d", bnad->netdev->name,
				tx_id + tx_info->tcb[i]->id);
		err = request_irq(bnad->msix_table[vector_num].vector,
				  (irq_handler_t)bnad_msix_tx, 0,
				  tx_info->tcb[i]->name,
				  tx_info->tcb[i]);
		if (err)
			goto err_return;
	}

	return 0;

err_return:
	if (i > 0)
		bnad_tx_msix_unregister(bnad, tx_info, (i - 1));
	return -1;
}

/**
 * NOTE: Should be called for MSIX only
 * Unregisters Rx MSIX vector(s) from the kernel
 */
static void
bnad_rx_msix_unregister(struct bnad *bnad, struct bnad_rx_info *rx_info,
			int num_rxps)
{
	int i;
	int vector_num;

	for (i = 0; i < num_rxps; i++) {
		if (rx_info->rx_ctrl[i].ccb == NULL)
			continue;

		vector_num = rx_info->rx_ctrl[i].ccb->intr_vector;
		free_irq(bnad->msix_table[vector_num].vector,
			 rx_info->rx_ctrl[i].ccb);
	}
}

/**
 * NOTE: Should be called for MSIX only
 * Registers Tx MSIX vector(s) and ISR(s), cookie with the kernel
 */
static int
bnad_rx_msix_register(struct bnad *bnad, struct bnad_rx_info *rx_info,
			uint rx_id, int num_rxps)
{
	int i;
	int err;
	int vector_num;

	for (i = 0; i < num_rxps; i++) {
		vector_num = rx_info->rx_ctrl[i].ccb->intr_vector;
		sprintf(rx_info->rx_ctrl[i].ccb->name, "%s CQ %d",
			bnad->netdev->name,
			rx_id + rx_info->rx_ctrl[i].ccb->id);
		err = request_irq(bnad->msix_table[vector_num].vector,
				  (irq_handler_t)bnad_msix_rx, 0,
				  rx_info->rx_ctrl[i].ccb->name,
				  rx_info->rx_ctrl[i].ccb);
		if (err)
			goto err_return;
	}

	return 0;

err_return:
	if (i > 0)
		bnad_rx_msix_unregister(bnad, rx_info, (i - 1));
	return -1;
}

/* Free Tx object Resources */
static void
bnad_tx_res_free(struct bnad *bnad, struct bna_res_info *res_info)
{
	int i;

	for (i = 0; i < BNA_TX_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
		else if (res_info[i].res_type == BNA_RES_T_INTR)
			bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info);
	}
}

/* Allocates memory and interrupt resources for Tx object */
static int
bnad_tx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info,
		  uint tx_id)
{
	int i, err = 0;

	for (i = 0; i < BNA_TX_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			err = bnad_mem_alloc(bnad,
					&res_info[i].res_u.mem_info);
		else if (res_info[i].res_type == BNA_RES_T_INTR)
			err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_TX, tx_id,
					&res_info[i].res_u.intr_info);
		if (err)
			goto err_return;
	}
	return 0;

err_return:
	bnad_tx_res_free(bnad, res_info);
	return err;
}

/* Free Rx object Resources */
static void
bnad_rx_res_free(struct bnad *bnad, struct bna_res_info *res_info)
{
	int i;

	for (i = 0; i < BNA_RX_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
		else if (res_info[i].res_type == BNA_RES_T_INTR)
			bnad_txrx_irq_free(bnad, &res_info[i].res_u.intr_info);
	}
}

/* Allocates memory and interrupt resources for Rx object */
static int
bnad_rx_res_alloc(struct bnad *bnad, struct bna_res_info *res_info,
		  uint rx_id)
{
	int i, err = 0;

	/* All memory needs to be allocated before setup_ccbs */
	for (i = 0; i < BNA_RX_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			err = bnad_mem_alloc(bnad,
					&res_info[i].res_u.mem_info);
		else if (res_info[i].res_type == BNA_RES_T_INTR)
			err = bnad_txrx_irq_alloc(bnad, BNAD_INTR_RX, rx_id,
					&res_info[i].res_u.intr_info);
		if (err)
			goto err_return;
	}
	return 0;

err_return:
	bnad_rx_res_free(bnad, res_info);
	return err;
}

/* Timer callbacks */
/* a) IOC timer */
static void
bnad_ioc_timeout(unsigned long data)
{
	struct bnad *bnad = (struct bnad *)data;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bfa_nw_ioc_timeout((void *) &bnad->bna.device.ioc);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

static void
bnad_ioc_hb_check(unsigned long data)
{
	struct bnad *bnad = (struct bnad *)data;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bfa_nw_ioc_hb_check((void *) &bnad->bna.device.ioc);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

static void
bnad_ioc_sem_timeout(unsigned long data)
{
	struct bnad *bnad = (struct bnad *)data;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bfa_nw_ioc_sem_timeout((void *) &bnad->bna.device.ioc);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

/*
 * All timer routines use bnad->bna_lock to protect against
 * the following race, which may occur in case of no locking:
 * 	Time	CPU m  		CPU n
 *	0       1 = test_bit
 *	1			clear_bit
 *	2			del_timer_sync
 *	3	mod_timer
 */

/* b) Dynamic Interrupt Moderation Timer */
static void
bnad_dim_timeout(unsigned long data)
{
	struct bnad *bnad = (struct bnad *)data;
	struct bnad_rx_info *rx_info;
	struct bnad_rx_ctrl *rx_ctrl;
	int i, j;
	unsigned long flags;

	if (!netif_carrier_ok(bnad->netdev))
		return;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	for (i = 0; i < bnad->num_rx; i++) {
		rx_info = &bnad->rx_info[i];
		if (!rx_info->rx)
			continue;
		for (j = 0; j < bnad->num_rxp_per_rx; j++) {
			rx_ctrl = &rx_info->rx_ctrl[j];
			if (!rx_ctrl->ccb)
				continue;
			bna_rx_dim_update(rx_ctrl->ccb);
		}
	}

	/* Check for BNAD_CF_DIM_ENABLED, does not eleminate a race */
	if (test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags))
		mod_timer(&bnad->dim_timer,
			  jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ));
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

/* c)  Statistics Timer */
static void
bnad_stats_timeout(unsigned long data)
{
	struct bnad *bnad = (struct bnad *)data;
	unsigned long flags;

	if (!netif_running(bnad->netdev) ||
		!test_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
		return;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_stats_get(&bnad->bna);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

/*
 * Set up timer for DIM
 * Called with bnad->bna_lock held
 */
void
bnad_dim_timer_start(struct bnad *bnad)
{
	if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED &&
	    !test_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags)) {
		setup_timer(&bnad->dim_timer, bnad_dim_timeout,
			    (unsigned long)bnad);
		set_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags);
		mod_timer(&bnad->dim_timer,
			  jiffies + msecs_to_jiffies(BNAD_DIM_TIMER_FREQ));
	}
}

/*
 * Set up timer for statistics
 * Called with mutex_lock(&bnad->conf_mutex) held
 */
static void
bnad_stats_timer_start(struct bnad *bnad)
{
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (!test_and_set_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags)) {
		setup_timer(&bnad->stats_timer, bnad_stats_timeout,
			    (unsigned long)bnad);
		mod_timer(&bnad->stats_timer,
			  jiffies + msecs_to_jiffies(BNAD_STATS_TIMER_FREQ));
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

/*
 * Stops the stats timer
 * Called with mutex_lock(&bnad->conf_mutex) held
 */
static void
bnad_stats_timer_stop(struct bnad *bnad)
{
	int to_del = 0;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (test_and_clear_bit(BNAD_RF_STATS_TIMER_RUNNING, &bnad->run_flags))
		to_del = 1;
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	if (to_del)
		del_timer_sync(&bnad->stats_timer);
}

/* Utilities */

static void
bnad_netdev_mc_list_get(struct net_device *netdev, u8 *mc_list)
{
	int i = 1; /* Index 0 has broadcast address */
	struct netdev_hw_addr *mc_addr;

	netdev_for_each_mc_addr(mc_addr, netdev) {
		memcpy(&mc_list[i * ETH_ALEN], &mc_addr->addr[0],
							ETH_ALEN);
		i++;
	}
}

static int
bnad_napi_poll_rx(struct napi_struct *napi, int budget)
{
	struct bnad_rx_ctrl *rx_ctrl =
		container_of(napi, struct bnad_rx_ctrl, napi);
	struct bna_ccb *ccb;
	struct bnad *bnad;
	int rcvd = 0;

	ccb = rx_ctrl->ccb;

	bnad = ccb->bnad;

	if (!netif_carrier_ok(bnad->netdev))
		goto poll_exit;

	rcvd = bnad_poll_cq(bnad, ccb, budget);
	if (rcvd == budget)
		return rcvd;

poll_exit:
	napi_complete((napi));

	BNAD_UPDATE_CTR(bnad, netif_rx_complete);

	bnad_enable_rx_irq(bnad, ccb);
	return rcvd;
}

static void
bnad_napi_enable(struct bnad *bnad, u32 rx_id)
{
	struct bnad_rx_ctrl *rx_ctrl;
	int i;

	/* Initialize & enable NAPI */
	for (i = 0; i <	bnad->num_rxp_per_rx; i++) {
		rx_ctrl = &bnad->rx_info[rx_id].rx_ctrl[i];

		netif_napi_add(bnad->netdev, &rx_ctrl->napi,
			       bnad_napi_poll_rx, 64);

		napi_enable(&rx_ctrl->napi);
	}
}

static void
bnad_napi_disable(struct bnad *bnad, u32 rx_id)
{
	int i;

	/* First disable and then clean up */
	for (i = 0; i < bnad->num_rxp_per_rx; i++) {
		napi_disable(&bnad->rx_info[rx_id].rx_ctrl[i].napi);
		netif_napi_del(&bnad->rx_info[rx_id].rx_ctrl[i].napi);
	}
}

/* Should be held with conf_lock held */
void
bnad_cleanup_tx(struct bnad *bnad, uint tx_id)
{
	struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id];
	struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0];
	unsigned long flags;

	if (!tx_info->tx)
		return;

	init_completion(&bnad->bnad_completions.tx_comp);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_tx_disable(tx_info->tx, BNA_HARD_CLEANUP, bnad_cb_tx_disabled);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	wait_for_completion(&bnad->bnad_completions.tx_comp);

	if (tx_info->tcb[0]->intr_type == BNA_INTR_T_MSIX)
		bnad_tx_msix_unregister(bnad, tx_info,
			bnad->num_txq_per_tx);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_tx_destroy(tx_info->tx);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	tx_info->tx = NULL;

	if (0 == tx_id)
		tasklet_kill(&bnad->tx_free_tasklet);

	bnad_tx_res_free(bnad, res_info);
}

/* Should be held with conf_lock held */
int
bnad_setup_tx(struct bnad *bnad, uint tx_id)
{
	int err;
	struct bnad_tx_info *tx_info = &bnad->tx_info[tx_id];
	struct bna_res_info *res_info = &bnad->tx_res_info[tx_id].res_info[0];
	struct bna_intr_info *intr_info =
			&res_info[BNA_TX_RES_INTR_T_TXCMPL].res_u.intr_info;
	struct bna_tx_config *tx_config = &bnad->tx_config[tx_id];
	struct bna_tx_event_cbfn tx_cbfn;
	struct bna_tx *tx;
	unsigned long flags;

	/* Initialize the Tx object configuration */
	tx_config->num_txq = bnad->num_txq_per_tx;
	tx_config->txq_depth = bnad->txq_depth;
	tx_config->tx_type = BNA_TX_T_REGULAR;

	/* Initialize the tx event handlers */
	tx_cbfn.tcb_setup_cbfn = bnad_cb_tcb_setup;
	tx_cbfn.tcb_destroy_cbfn = bnad_cb_tcb_destroy;
	tx_cbfn.tx_stall_cbfn = bnad_cb_tx_stall;
	tx_cbfn.tx_resume_cbfn = bnad_cb_tx_resume;
	tx_cbfn.tx_cleanup_cbfn = bnad_cb_tx_cleanup;

	/* Get BNA's resource requirement for one tx object */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_tx_res_req(bnad->num_txq_per_tx,
		bnad->txq_depth, res_info);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	/* Fill Unmap Q memory requirements */
	BNAD_FILL_UNMAPQ_MEM_REQ(
			&res_info[BNA_TX_RES_MEM_T_UNMAPQ],
			bnad->num_txq_per_tx,
			BNAD_TX_UNMAPQ_DEPTH);

	/* Allocate resources */
	err = bnad_tx_res_alloc(bnad, res_info, tx_id);
	if (err)
		return err;

	/* Ask BNA to create one Tx object, supplying required resources */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	tx = bna_tx_create(&bnad->bna, bnad, tx_config, &tx_cbfn, res_info,
			tx_info);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	if (!tx)
		goto err_return;
	tx_info->tx = tx;

	/* Register ISR for the Tx object */
	if (intr_info->intr_type == BNA_INTR_T_MSIX) {
		err = bnad_tx_msix_register(bnad, tx_info,
			tx_id, bnad->num_txq_per_tx);
		if (err)
			goto err_return;
	}

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_tx_enable(tx);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return 0;

err_return:
	bnad_tx_res_free(bnad, res_info);
	return err;
}

/* Setup the rx config for bna_rx_create */
/* bnad decides the configuration */
static void
bnad_init_rx_config(struct bnad *bnad, struct bna_rx_config *rx_config)
{
	rx_config->rx_type = BNA_RX_T_REGULAR;
	rx_config->num_paths = bnad->num_rxp_per_rx;

	if (bnad->num_rxp_per_rx > 1) {
		rx_config->rss_status = BNA_STATUS_T_ENABLED;
		rx_config->rss_config.hash_type =
				(BFI_RSS_T_V4_TCP |
				 BFI_RSS_T_V6_TCP |
				 BFI_RSS_T_V4_IP  |
				 BFI_RSS_T_V6_IP);
		rx_config->rss_config.hash_mask =
				bnad->num_rxp_per_rx - 1;
		get_random_bytes(rx_config->rss_config.toeplitz_hash_key,
			sizeof(rx_config->rss_config.toeplitz_hash_key));
	} else {
		rx_config->rss_status = BNA_STATUS_T_DISABLED;
		memset(&rx_config->rss_config, 0,
		       sizeof(rx_config->rss_config));
	}
	rx_config->rxp_type = BNA_RXP_SLR;
	rx_config->q_depth = bnad->rxq_depth;

	rx_config->small_buff_size = BFI_SMALL_RXBUF_SIZE;

	rx_config->vlan_strip_status = BNA_STATUS_T_ENABLED;
}

/* Called with mutex_lock(&bnad->conf_mutex) held */
void
bnad_cleanup_rx(struct bnad *bnad, uint rx_id)
{
	struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id];
	struct bna_rx_config *rx_config = &bnad->rx_config[rx_id];
	struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0];
	unsigned long flags;
	int dim_timer_del = 0;

	if (!rx_info->rx)
		return;

	if (0 == rx_id) {
		spin_lock_irqsave(&bnad->bna_lock, flags);
		dim_timer_del = bnad_dim_timer_running(bnad);
		if (dim_timer_del)
			clear_bit(BNAD_RF_DIM_TIMER_RUNNING, &bnad->run_flags);
		spin_unlock_irqrestore(&bnad->bna_lock, flags);
		if (dim_timer_del)
			del_timer_sync(&bnad->dim_timer);
	}

	bnad_napi_disable(bnad, rx_id);

	init_completion(&bnad->bnad_completions.rx_comp);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_rx_disable(rx_info->rx, BNA_HARD_CLEANUP, bnad_cb_rx_disabled);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	wait_for_completion(&bnad->bnad_completions.rx_comp);

	if (rx_info->rx_ctrl[0].ccb->intr_type == BNA_INTR_T_MSIX)
		bnad_rx_msix_unregister(bnad, rx_info, rx_config->num_paths);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_rx_destroy(rx_info->rx);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	rx_info->rx = NULL;

	bnad_rx_res_free(bnad, res_info);
}

/* Called with mutex_lock(&bnad->conf_mutex) held */
int
bnad_setup_rx(struct bnad *bnad, uint rx_id)
{
	int err;
	struct bnad_rx_info *rx_info = &bnad->rx_info[rx_id];
	struct bna_res_info *res_info = &bnad->rx_res_info[rx_id].res_info[0];
	struct bna_intr_info *intr_info =
			&res_info[BNA_RX_RES_T_INTR].res_u.intr_info;
	struct bna_rx_config *rx_config = &bnad->rx_config[rx_id];
	struct bna_rx_event_cbfn rx_cbfn;
	struct bna_rx *rx;
	unsigned long flags;

	/* Initialize the Rx object configuration */
	bnad_init_rx_config(bnad, rx_config);

	/* Initialize the Rx event handlers */
	rx_cbfn.rcb_setup_cbfn = bnad_cb_rcb_setup;
	rx_cbfn.rcb_destroy_cbfn = bnad_cb_rcb_destroy;
	rx_cbfn.rcb_destroy_cbfn = NULL;
	rx_cbfn.ccb_setup_cbfn = bnad_cb_ccb_setup;
	rx_cbfn.ccb_destroy_cbfn = bnad_cb_ccb_destroy;
	rx_cbfn.rx_cleanup_cbfn = bnad_cb_rx_cleanup;
	rx_cbfn.rx_post_cbfn = bnad_cb_rx_post;

	/* Get BNA's resource requirement for one Rx object */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_rx_res_req(rx_config, res_info);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	/* Fill Unmap Q memory requirements */
	BNAD_FILL_UNMAPQ_MEM_REQ(
			&res_info[BNA_RX_RES_MEM_T_UNMAPQ],
			rx_config->num_paths +
			((rx_config->rxp_type == BNA_RXP_SINGLE) ? 0 :
				rx_config->num_paths), BNAD_RX_UNMAPQ_DEPTH);

	/* Allocate resource */
	err = bnad_rx_res_alloc(bnad, res_info, rx_id);
	if (err)
		return err;

	/* Ask BNA to create one Rx object, supplying required resources */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	rx = bna_rx_create(&bnad->bna, bnad, rx_config, &rx_cbfn, res_info,
			rx_info);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	if (!rx)
		goto err_return;
	rx_info->rx = rx;

	/* Register ISR for the Rx object */
	if (intr_info->intr_type == BNA_INTR_T_MSIX) {
		err = bnad_rx_msix_register(bnad, rx_info, rx_id,
						rx_config->num_paths);
		if (err)
			goto err_return;
	}

	/* Enable NAPI */
	bnad_napi_enable(bnad, rx_id);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (0 == rx_id) {
		/* Set up Dynamic Interrupt Moderation Vector */
		if (bnad->cfg_flags & BNAD_CF_DIM_ENABLED)
			bna_rx_dim_reconfig(&bnad->bna, bna_napi_dim_vector);

		/* Enable VLAN filtering only on the default Rx */
		bna_rx_vlanfilter_enable(rx);

		/* Start the DIM timer */
		bnad_dim_timer_start(bnad);
	}

	bna_rx_enable(rx);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return 0;

err_return:
	bnad_cleanup_rx(bnad, rx_id);
	return err;
}

/* Called with conf_lock & bnad->bna_lock held */
void
bnad_tx_coalescing_timeo_set(struct bnad *bnad)
{
	struct bnad_tx_info *tx_info;

	tx_info = &bnad->tx_info[0];
	if (!tx_info->tx)
		return;

	bna_tx_coalescing_timeo_set(tx_info->tx, bnad->tx_coalescing_timeo);
}

/* Called with conf_lock & bnad->bna_lock held */
void
bnad_rx_coalescing_timeo_set(struct bnad *bnad)
{
	struct bnad_rx_info *rx_info;
	int 	i;

	for (i = 0; i < bnad->num_rx; i++) {
		rx_info = &bnad->rx_info[i];
		if (!rx_info->rx)
			continue;
		bna_rx_coalescing_timeo_set(rx_info->rx,
				bnad->rx_coalescing_timeo);
	}
}

/*
 * Called with bnad->bna_lock held
 */
static int
bnad_mac_addr_set_locked(struct bnad *bnad, u8 *mac_addr)
{
	int ret;

	if (!is_valid_ether_addr(mac_addr))
		return -EADDRNOTAVAIL;

	/* If datapath is down, pretend everything went through */
	if (!bnad->rx_info[0].rx)
		return 0;

	ret = bna_rx_ucast_set(bnad->rx_info[0].rx, mac_addr, NULL);
	if (ret != BNA_CB_SUCCESS)
		return -EADDRNOTAVAIL;

	return 0;
}

/* Should be called with conf_lock held */
static int
bnad_enable_default_bcast(struct bnad *bnad)
{
	struct bnad_rx_info *rx_info = &bnad->rx_info[0];
	int ret;
	unsigned long flags;

	init_completion(&bnad->bnad_completions.mcast_comp);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	ret = bna_rx_mcast_add(rx_info->rx, (u8 *)bnad_bcast_addr,
				bnad_cb_rx_mcast_add);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	if (ret == BNA_CB_SUCCESS)
		wait_for_completion(&bnad->bnad_completions.mcast_comp);
	else
		return -ENODEV;

	if (bnad->bnad_completions.mcast_comp_status != BNA_CB_SUCCESS)
		return -ENODEV;

	return 0;
}

/* Statistics utilities */
void
bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
{
	int i, j;

	for (i = 0; i < bnad->num_rx; i++) {
		for (j = 0; j < bnad->num_rxp_per_rx; j++) {
			if (bnad->rx_info[i].rx_ctrl[j].ccb) {
				stats->rx_packets += bnad->rx_info[i].
				rx_ctrl[j].ccb->rcb[0]->rxq->rx_packets;
				stats->rx_bytes += bnad->rx_info[i].
					rx_ctrl[j].ccb->rcb[0]->rxq->rx_bytes;
				if (bnad->rx_info[i].rx_ctrl[j].ccb->rcb[1] &&
					bnad->rx_info[i].rx_ctrl[j].ccb->
					rcb[1]->rxq) {
					stats->rx_packets +=
						bnad->rx_info[i].rx_ctrl[j].
						ccb->rcb[1]->rxq->rx_packets;
					stats->rx_bytes +=
						bnad->rx_info[i].rx_ctrl[j].
						ccb->rcb[1]->rxq->rx_bytes;
				}
			}
		}
	}
	for (i = 0; i < bnad->num_tx; i++) {
		for (j = 0; j < bnad->num_txq_per_tx; j++) {
			if (bnad->tx_info[i].tcb[j]) {
				stats->tx_packets +=
				bnad->tx_info[i].tcb[j]->txq->tx_packets;
				stats->tx_bytes +=
					bnad->tx_info[i].tcb[j]->txq->tx_bytes;
			}
		}
	}
}

/*
 * Must be called with the bna_lock held.
 */
void
bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
{
	struct bfi_ll_stats_mac *mac_stats;
	u64 bmap;
	int i;

	mac_stats = &bnad->stats.bna_stats->hw_stats->mac_stats;
	stats->rx_errors =
		mac_stats->rx_fcs_error + mac_stats->rx_alignment_error +
		mac_stats->rx_frame_length_error + mac_stats->rx_code_error +
		mac_stats->rx_undersize;
	stats->tx_errors = mac_stats->tx_fcs_error +
					mac_stats->tx_undersize;
	stats->rx_dropped = mac_stats->rx_drop;
	stats->tx_dropped = mac_stats->tx_drop;
	stats->multicast = mac_stats->rx_multicast;
	stats->collisions = mac_stats->tx_total_collision;

	stats->rx_length_errors = mac_stats->rx_frame_length_error;

	/* receive ring buffer overflow  ?? */

	stats->rx_crc_errors = mac_stats->rx_fcs_error;
	stats->rx_frame_errors = mac_stats->rx_alignment_error;
	/* recv'r fifo overrun */
	bmap = (u64)bnad->stats.bna_stats->rxf_bmap[0] |
		((u64)bnad->stats.bna_stats->rxf_bmap[1] << 32);
	for (i = 0; bmap && (i < BFI_LL_RXF_ID_MAX); i++) {
		if (bmap & 1) {
			stats->rx_fifo_errors +=
				bnad->stats.bna_stats->
					hw_stats->rxf_stats[i].frame_drops;
			break;
		}
		bmap >>= 1;
	}
}

static void
bnad_mbox_irq_sync(struct bnad *bnad)
{
	u32 irq;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (bnad->cfg_flags & BNAD_CF_MSIX)
		irq = bnad->msix_table[bnad->msix_num - 1].vector;
	else
		irq = bnad->pcidev->irq;
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	synchronize_irq(irq);
}

/* Utility used by bnad_start_xmit, for doing TSO */
static int
bnad_tso_prepare(struct bnad *bnad, struct sk_buff *skb)
{
	int err;

	/* SKB_GSO_TCPV4 and SKB_GSO_TCPV6 is defined since 2.6.18. */
	BUG_ON(!(skb_shinfo(skb)->gso_type == SKB_GSO_TCPV4 ||
		   skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6));
	if (skb_header_cloned(skb)) {
		err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
		if (err) {
			BNAD_UPDATE_CTR(bnad, tso_err);
			return err;
		}
	}

	/*
	 * For TSO, the TCP checksum field is seeded with pseudo-header sum
	 * excluding the length field.
	 */
	if (skb->protocol == htons(ETH_P_IP)) {
		struct iphdr *iph = ip_hdr(skb);

		/* Do we really need these? */
		iph->tot_len = 0;
		iph->check = 0;

		tcp_hdr(skb)->check =
			~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
					   IPPROTO_TCP, 0);
		BNAD_UPDATE_CTR(bnad, tso4);
	} else {
		struct ipv6hdr *ipv6h = ipv6_hdr(skb);

		BUG_ON(!(skb->protocol == htons(ETH_P_IPV6)));
		ipv6h->payload_len = 0;
		tcp_hdr(skb)->check =
			~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, 0,
					 IPPROTO_TCP, 0);
		BNAD_UPDATE_CTR(bnad, tso6);
	}

	return 0;
}

/*
 * Initialize Q numbers depending on Rx Paths
 * Called with bnad->bna_lock held, because of cfg_flags
 * access.
 */
static void
bnad_q_num_init(struct bnad *bnad)
{
	int rxps;

	rxps = min((uint)num_online_cpus(),
			(uint)(BNAD_MAX_RXS * BNAD_MAX_RXPS_PER_RX));

	if (!(bnad->cfg_flags & BNAD_CF_MSIX))
		rxps = 1;	/* INTx */

	bnad->num_rx = 1;
	bnad->num_tx = 1;
	bnad->num_rxp_per_rx = rxps;
	bnad->num_txq_per_tx = BNAD_TXQ_NUM;
}

/*
 * Adjusts the Q numbers, given a number of msix vectors
 * Give preference to RSS as opposed to Tx priority Queues,
 * in such a case, just use 1 Tx Q
 * Called with bnad->bna_lock held b'cos of cfg_flags access
 */
static void
bnad_q_num_adjust(struct bnad *bnad, int msix_vectors)
{
	bnad->num_txq_per_tx = 1;
	if ((msix_vectors >= (bnad->num_tx * bnad->num_txq_per_tx)  +
	     bnad_rxqs_per_cq + BNAD_MAILBOX_MSIX_VECTORS) &&
	    (bnad->cfg_flags & BNAD_CF_MSIX)) {
		bnad->num_rxp_per_rx = msix_vectors -
			(bnad->num_tx * bnad->num_txq_per_tx) -
			BNAD_MAILBOX_MSIX_VECTORS;
	} else
		bnad->num_rxp_per_rx = 1;
}

/* Enable / disable device */
static void
bnad_device_disable(struct bnad *bnad)
{
	unsigned long flags;

	init_completion(&bnad->bnad_completions.ioc_comp);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_device_disable(&bnad->bna.device, BNA_HARD_CLEANUP);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	wait_for_completion(&bnad->bnad_completions.ioc_comp);
}

static int
bnad_device_enable(struct bnad *bnad)
{
	int err = 0;
	unsigned long flags;

	init_completion(&bnad->bnad_completions.ioc_comp);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_device_enable(&bnad->bna.device);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	wait_for_completion(&bnad->bnad_completions.ioc_comp);

	if (bnad->bnad_completions.ioc_comp_status)
		err = bnad->bnad_completions.ioc_comp_status;

	return err;
}

/* Free BNA resources */
static void
bnad_res_free(struct bnad *bnad)
{
	int i;
	struct bna_res_info *res_info = &bnad->res_info[0];

	for (i = 0; i < BNA_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			bnad_mem_free(bnad, &res_info[i].res_u.mem_info);
		else
			bnad_mbox_irq_free(bnad, &res_info[i].res_u.intr_info);
	}
}

/* Allocates memory and interrupt resources for BNA */
static int
bnad_res_alloc(struct bnad *bnad)
{
	int i, err;
	struct bna_res_info *res_info = &bnad->res_info[0];

	for (i = 0; i < BNA_RES_T_MAX; i++) {
		if (res_info[i].res_type == BNA_RES_T_MEM)
			err = bnad_mem_alloc(bnad, &res_info[i].res_u.mem_info);
		else
			err = bnad_mbox_irq_alloc(bnad,
						  &res_info[i].res_u.intr_info);
		if (err)
			goto err_return;
	}
	return 0;

err_return:
	bnad_res_free(bnad);
	return err;
}

/* Interrupt enable / disable */
static void
bnad_enable_msix(struct bnad *bnad)
{
	int i, ret;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (!(bnad->cfg_flags & BNAD_CF_MSIX)) {
		spin_unlock_irqrestore(&bnad->bna_lock, flags);
		return;
	}
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	if (bnad->msix_table)
		return;

	bnad->msix_table =
		kcalloc(bnad->msix_num, sizeof(struct msix_entry), GFP_KERNEL);

	if (!bnad->msix_table)
		goto intx_mode;

	for (i = 0; i < bnad->msix_num; i++)
		bnad->msix_table[i].entry = i;

	ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, bnad->msix_num);
	if (ret > 0) {
		/* Not enough MSI-X vectors. */

		spin_lock_irqsave(&bnad->bna_lock, flags);
		/* ret = #of vectors that we got */
		bnad_q_num_adjust(bnad, ret);
		spin_unlock_irqrestore(&bnad->bna_lock, flags);

		bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx)
			+ (bnad->num_rx
			* bnad->num_rxp_per_rx) +
			 BNAD_MAILBOX_MSIX_VECTORS;

		/* Try once more with adjusted numbers */
		/* If this fails, fall back to INTx */
		ret = pci_enable_msix(bnad->pcidev, bnad->msix_table,
				      bnad->msix_num);
		if (ret)
			goto intx_mode;

	} else if (ret < 0)
		goto intx_mode;
	return;

intx_mode:

	kfree(bnad->msix_table);
	bnad->msix_table = NULL;
	bnad->msix_num = 0;
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bnad->cfg_flags &= ~BNAD_CF_MSIX;
	bnad_q_num_init(bnad);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

static void
bnad_disable_msix(struct bnad *bnad)
{
	u32 cfg_flags;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	cfg_flags = bnad->cfg_flags;
	if (bnad->cfg_flags & BNAD_CF_MSIX)
		bnad->cfg_flags &= ~BNAD_CF_MSIX;
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	if (cfg_flags & BNAD_CF_MSIX) {
		pci_disable_msix(bnad->pcidev);
		kfree(bnad->msix_table);
		bnad->msix_table = NULL;
	}
}

/* Netdev entry points */
static int
bnad_open(struct net_device *netdev)
{
	int err;
	struct bnad *bnad = netdev_priv(netdev);
	struct bna_pause_config pause_config;
	int mtu;
	unsigned long flags;

	mutex_lock(&bnad->conf_mutex);

	/* Tx */
	err = bnad_setup_tx(bnad, 0);
	if (err)
		goto err_return;

	/* Rx */
	err = bnad_setup_rx(bnad, 0);
	if (err)
		goto cleanup_tx;

	/* Port */
	pause_config.tx_pause = 0;
	pause_config.rx_pause = 0;

	mtu = ETH_HLEN + bnad->netdev->mtu + ETH_FCS_LEN;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_port_mtu_set(&bnad->bna.port, mtu, NULL);
	bna_port_pause_config(&bnad->bna.port, &pause_config, NULL);
	bna_port_enable(&bnad->bna.port);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	/* Enable broadcast */
	bnad_enable_default_bcast(bnad);

	/* Set the UCAST address */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bnad_mac_addr_set_locked(bnad, netdev->dev_addr);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	/* Start the stats timer */
	bnad_stats_timer_start(bnad);

	mutex_unlock(&bnad->conf_mutex);

	return 0;

cleanup_tx:
	bnad_cleanup_tx(bnad, 0);

err_return:
	mutex_unlock(&bnad->conf_mutex);
	return err;
}

static int
bnad_stop(struct net_device *netdev)
{
	struct bnad *bnad = netdev_priv(netdev);
	unsigned long flags;

	mutex_lock(&bnad->conf_mutex);

	/* Stop the stats timer */
	bnad_stats_timer_stop(bnad);

	init_completion(&bnad->bnad_completions.port_comp);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_port_disable(&bnad->bna.port, BNA_HARD_CLEANUP,
			bnad_cb_port_disabled);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	wait_for_completion(&bnad->bnad_completions.port_comp);

	bnad_cleanup_tx(bnad, 0);
	bnad_cleanup_rx(bnad, 0);

	/* Synchronize mailbox IRQ */
	bnad_mbox_irq_sync(bnad);

	mutex_unlock(&bnad->conf_mutex);

	return 0;
}

/* TX */
/*
 * bnad_start_xmit : Netdev entry point for Transmit
 *		     Called under lock held by net_device
 */
static netdev_tx_t
bnad_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
	struct bnad *bnad = netdev_priv(netdev);

	u16 		txq_prod, vlan_tag = 0;
	u32 		unmap_prod, wis, wis_used, wi_range;
	u32 		vectors, vect_id, i, acked;
	u32		tx_id;
	int 			err;

	struct bnad_tx_info *tx_info;
	struct bna_tcb *tcb;
	struct bnad_unmap_q *unmap_q;
	dma_addr_t 		dma_addr;
	struct bna_txq_entry *txqent;
	bna_txq_wi_ctrl_flag_t 	flags;

	if (unlikely
	    (skb->len <= ETH_HLEN || skb->len > BFI_TX_MAX_DATA_PER_PKT)) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	tx_id = 0;

	tx_info = &bnad->tx_info[tx_id];
	tcb = tx_info->tcb[tx_id];
	unmap_q = tcb->unmap_q;

	/*
	 * Takes care of the Tx that is scheduled between clearing the flag
	 * and the netif_stop_queue() call.
	 */
	if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags))) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}

	vectors = 1 + skb_shinfo(skb)->nr_frags;
	if (vectors > BFI_TX_MAX_VECTORS_PER_PKT) {
		dev_kfree_skb(skb);
		return NETDEV_TX_OK;
	}
	wis = BNA_TXQ_WI_NEEDED(vectors);	/* 4 vectors per work item */
	acked = 0;
	if (unlikely
	    (wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) ||
	     vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) {
		if ((u16) (*tcb->hw_consumer_index) !=
		    tcb->consumer_index &&
		    !test_and_set_bit(BNAD_TXQ_FREE_SENT, &tcb->flags)) {
			acked = bnad_free_txbufs(bnad, tcb);
			if (likely(test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
				bna_ib_ack(tcb->i_dbell, acked);
			smp_mb__before_clear_bit();
			clear_bit(BNAD_TXQ_FREE_SENT, &tcb->flags);
		} else {
			netif_stop_queue(netdev);
			BNAD_UPDATE_CTR(bnad, netif_queue_stop);
		}

		smp_mb();
		/*
		 * Check again to deal with race condition between
		 * netif_stop_queue here, and netif_wake_queue in
		 * interrupt handler which is not inside netif tx lock.
		 */
		if (likely
		    (wis > BNA_QE_FREE_CNT(tcb, tcb->q_depth) ||
		     vectors > BNA_QE_FREE_CNT(unmap_q, unmap_q->q_depth))) {
			BNAD_UPDATE_CTR(bnad, netif_queue_stop);
			return NETDEV_TX_BUSY;
		} else {
			netif_wake_queue(netdev);
			BNAD_UPDATE_CTR(bnad, netif_queue_wakeup);
		}
	}

	unmap_prod = unmap_q->producer_index;
	wis_used = 1;
	vect_id = 0;
	flags = 0;

	txq_prod = tcb->producer_index;
	BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt, txqent, wi_range);
	BUG_ON(!(wi_range <= tcb->q_depth));
	txqent->hdr.wi.reserved = 0;
	txqent->hdr.wi.num_vectors = vectors;
	txqent->hdr.wi.opcode =
		htons((skb_is_gso(skb) ? BNA_TXQ_WI_SEND_LSO :
		       BNA_TXQ_WI_SEND));

	if (vlan_tx_tag_present(skb)) {
		vlan_tag = (u16) vlan_tx_tag_get(skb);
		flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN);
	}
	if (test_bit(BNAD_RF_CEE_RUNNING, &bnad->run_flags)) {
		vlan_tag =
			(tcb->priority & 0x7) << 13 | (vlan_tag & 0x1fff);
		flags |= (BNA_TXQ_WI_CF_INS_PRIO | BNA_TXQ_WI_CF_INS_VLAN);
	}

	txqent->hdr.wi.vlan_tag = htons(vlan_tag);

	if (skb_is_gso(skb)) {
		err = bnad_tso_prepare(bnad, skb);
		if (err) {
			dev_kfree_skb(skb);
			return NETDEV_TX_OK;
		}
		txqent->hdr.wi.lso_mss = htons(skb_is_gso(skb));
		flags |= (BNA_TXQ_WI_CF_IP_CKSUM | BNA_TXQ_WI_CF_TCP_CKSUM);
		txqent->hdr.wi.l4_hdr_size_n_offset =
			htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
			      (tcp_hdrlen(skb) >> 2,
			       skb_transport_offset(skb)));
	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
		u8 proto = 0;

		txqent->hdr.wi.lso_mss = 0;

		if (skb->protocol == htons(ETH_P_IP))
			proto = ip_hdr(skb)->protocol;
		else if (skb->protocol == htons(ETH_P_IPV6)) {
			/* nexthdr may not be TCP immediately. */
			proto = ipv6_hdr(skb)->nexthdr;
		}
		if (proto == IPPROTO_TCP) {
			flags |= BNA_TXQ_WI_CF_TCP_CKSUM;
			txqent->hdr.wi.l4_hdr_size_n_offset =
				htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
				      (0, skb_transport_offset(skb)));

			BNAD_UPDATE_CTR(bnad, tcpcsum_offload);

			BUG_ON(!(skb_headlen(skb) >=
				skb_transport_offset(skb) + tcp_hdrlen(skb)));

		} else if (proto == IPPROTO_UDP) {
			flags |= BNA_TXQ_WI_CF_UDP_CKSUM;
			txqent->hdr.wi.l4_hdr_size_n_offset =
				htons(BNA_TXQ_WI_L4_HDR_N_OFFSET
				      (0, skb_transport_offset(skb)));

			BNAD_UPDATE_CTR(bnad, udpcsum_offload);

			BUG_ON(!(skb_headlen(skb) >=
				   skb_transport_offset(skb) +
				   sizeof(struct udphdr)));
		} else {
			err = skb_checksum_help(skb);
			BNAD_UPDATE_CTR(bnad, csum_help);
			if (err) {
				dev_kfree_skb(skb);
				BNAD_UPDATE_CTR(bnad, csum_help_err);
				return NETDEV_TX_OK;
			}
		}
	} else {
		txqent->hdr.wi.lso_mss = 0;
		txqent->hdr.wi.l4_hdr_size_n_offset = 0;
	}

	txqent->hdr.wi.flags = htons(flags);

	txqent->hdr.wi.frame_length = htonl(skb->len);

	unmap_q->unmap_array[unmap_prod].skb = skb;
	BUG_ON(!(skb_headlen(skb) <= BFI_TX_MAX_DATA_PER_VECTOR));
	txqent->vector[vect_id].length = htons(skb_headlen(skb));
	dma_addr = pci_map_single(bnad->pcidev, skb->data, skb_headlen(skb),
		PCI_DMA_TODEVICE);
	pci_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr,
			   dma_addr);

	BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[vect_id].host_addr);
	BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);

	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
		struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
		u32		size = frag->size;

		if (++vect_id == BFI_TX_MAX_VECTORS_PER_WI) {
			vect_id = 0;
			if (--wi_range)
				txqent++;
			else {
				BNA_QE_INDX_ADD(txq_prod, wis_used,
						tcb->q_depth);
				wis_used = 0;
				BNA_TXQ_QPGE_PTR_GET(txq_prod, tcb->sw_qpt,
						     txqent, wi_range);
				BUG_ON(!(wi_range <= tcb->q_depth));
			}
			wis_used++;
			txqent->hdr.wi_ext.opcode = htons(BNA_TXQ_WI_EXTENSION);
		}

		BUG_ON(!(size <= BFI_TX_MAX_DATA_PER_VECTOR));
		txqent->vector[vect_id].length = htons(size);
		dma_addr =
			pci_map_page(bnad->pcidev, frag->page,
				     frag->page_offset, size,
				     PCI_DMA_TODEVICE);
		pci_unmap_addr_set(&unmap_q->unmap_array[unmap_prod], dma_addr,
				   dma_addr);
		BNA_SET_DMA_ADDR(dma_addr, &txqent->vector[vect_id].host_addr);
		BNA_QE_INDX_ADD(unmap_prod, 1, unmap_q->q_depth);
	}

	unmap_q->producer_index = unmap_prod;
	BNA_QE_INDX_ADD(txq_prod, wis_used, tcb->q_depth);
	tcb->producer_index = txq_prod;

	smp_mb();

	if (unlikely(!test_bit(BNAD_TXQ_TX_STARTED, &tcb->flags)))
		return NETDEV_TX_OK;

	bna_txq_prod_indx_doorbell(tcb);

	if ((u16) (*tcb->hw_consumer_index) != tcb->consumer_index)
		tasklet_schedule(&bnad->tx_free_tasklet);

	return NETDEV_TX_OK;
}

/*
 * Used spin_lock to synchronize reading of stats structures, which
 * is written by BNA under the same lock.
 */
static struct rtnl_link_stats64 *
bnad_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
{
	struct bnad *bnad = netdev_priv(netdev);
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);

	bnad_netdev_qstats_fill(bnad, stats);
	bnad_netdev_hwstats_fill(bnad, stats);

	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return stats;
}

static void
bnad_set_rx_mode(struct net_device *netdev)
{
	struct bnad *bnad = netdev_priv(netdev);
	u32	new_mask, valid_mask;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);

	new_mask = valid_mask = 0;

	if (netdev->flags & IFF_PROMISC) {
		if (!(bnad->cfg_flags & BNAD_CF_PROMISC)) {
			new_mask = BNAD_RXMODE_PROMISC_DEFAULT;
			valid_mask = BNAD_RXMODE_PROMISC_DEFAULT;
			bnad->cfg_flags |= BNAD_CF_PROMISC;
		}
	} else {
		if (bnad->cfg_flags & BNAD_CF_PROMISC) {
			new_mask = ~BNAD_RXMODE_PROMISC_DEFAULT;
			valid_mask = BNAD_RXMODE_PROMISC_DEFAULT;
			bnad->cfg_flags &= ~BNAD_CF_PROMISC;
		}
	}

	if (netdev->flags & IFF_ALLMULTI) {
		if (!(bnad->cfg_flags & BNAD_CF_ALLMULTI)) {
			new_mask |= BNA_RXMODE_ALLMULTI;
			valid_mask |= BNA_RXMODE_ALLMULTI;
			bnad->cfg_flags |= BNAD_CF_ALLMULTI;
		}
	} else {
		if (bnad->cfg_flags & BNAD_CF_ALLMULTI) {
			new_mask &= ~BNA_RXMODE_ALLMULTI;
			valid_mask |= BNA_RXMODE_ALLMULTI;
			bnad->cfg_flags &= ~BNAD_CF_ALLMULTI;
		}
	}

	bna_rx_mode_set(bnad->rx_info[0].rx, new_mask, valid_mask, NULL);

	if (!netdev_mc_empty(netdev)) {
		u8 *mcaddr_list;
		int mc_count = netdev_mc_count(netdev);

		/* Index 0 holds the broadcast address */
		mcaddr_list =
			kzalloc((mc_count + 1) * ETH_ALEN,
				GFP_ATOMIC);
		if (!mcaddr_list)
			goto unlock;

		memcpy(&mcaddr_list[0], &bnad_bcast_addr[0], ETH_ALEN);

		/* Copy rest of the MC addresses */
		bnad_netdev_mc_list_get(netdev, mcaddr_list);

		bna_rx_mcast_listset(bnad->rx_info[0].rx, mc_count + 1,
					mcaddr_list, NULL);

		/* Should we enable BNAD_CF_ALLMULTI for err != 0 ? */
		kfree(mcaddr_list);
	}
unlock:
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
}

/*
 * bna_lock is used to sync writes to netdev->addr
 * conf_lock cannot be used since this call may be made
 * in a non-blocking context.
 */
static int
bnad_set_mac_address(struct net_device *netdev, void *mac_addr)
{
	int err;
	struct bnad *bnad = netdev_priv(netdev);
	struct sockaddr *sa = (struct sockaddr *)mac_addr;
	unsigned long flags;

	spin_lock_irqsave(&bnad->bna_lock, flags);

	err = bnad_mac_addr_set_locked(bnad, sa->sa_data);

	if (!err)
		memcpy(netdev->dev_addr, sa->sa_data, netdev->addr_len);

	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	return err;
}

static int
bnad_change_mtu(struct net_device *netdev, int new_mtu)
{
	int mtu, err = 0;
	unsigned long flags;

	struct bnad *bnad = netdev_priv(netdev);

	if (new_mtu + ETH_HLEN < ETH_ZLEN || new_mtu > BNAD_JUMBO_MTU)
		return -EINVAL;

	mutex_lock(&bnad->conf_mutex);

	netdev->mtu = new_mtu;

	mtu = ETH_HLEN + new_mtu + ETH_FCS_LEN;

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_port_mtu_set(&bnad->bna.port, mtu, NULL);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	mutex_unlock(&bnad->conf_mutex);
	return err;
}

static void
bnad_vlan_rx_register(struct net_device *netdev,
				  struct vlan_group *vlan_grp)
{
	struct bnad *bnad = netdev_priv(netdev);

	mutex_lock(&bnad->conf_mutex);
	bnad->vlan_grp = vlan_grp;
	mutex_unlock(&bnad->conf_mutex);
}

static void
bnad_vlan_rx_add_vid(struct net_device *netdev,
				 unsigned short vid)
{
	struct bnad *bnad = netdev_priv(netdev);
	unsigned long flags;

	if (!bnad->rx_info[0].rx)
		return;

	mutex_lock(&bnad->conf_mutex);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_rx_vlan_add(bnad->rx_info[0].rx, vid);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	mutex_unlock(&bnad->conf_mutex);
}

static void
bnad_vlan_rx_kill_vid(struct net_device *netdev,
				  unsigned short vid)
{
	struct bnad *bnad = netdev_priv(netdev);
	unsigned long flags;

	if (!bnad->rx_info[0].rx)
		return;

	mutex_lock(&bnad->conf_mutex);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_rx_vlan_del(bnad->rx_info[0].rx, vid);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	mutex_unlock(&bnad->conf_mutex);
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void
bnad_netpoll(struct net_device *netdev)
{
	struct bnad *bnad = netdev_priv(netdev);
	struct bnad_rx_info *rx_info;
	struct bnad_rx_ctrl *rx_ctrl;
	u32 curr_mask;
	int i, j;

	if (!(bnad->cfg_flags & BNAD_CF_MSIX)) {
		bna_intx_disable(&bnad->bna, curr_mask);
		bnad_isr(bnad->pcidev->irq, netdev);
		bna_intx_enable(&bnad->bna, curr_mask);
	} else {
		for (i = 0; i < bnad->num_rx; i++) {
			rx_info = &bnad->rx_info[i];
			if (!rx_info->rx)
				continue;
			for (j = 0; j < bnad->num_rxp_per_rx; j++) {
				rx_ctrl = &rx_info->rx_ctrl[j];
				if (rx_ctrl->ccb) {
					bnad_disable_rx_irq(bnad,
							    rx_ctrl->ccb);
					bnad_netif_rx_schedule_poll(bnad,
							    rx_ctrl->ccb);
				}
			}
		}
	}
}
#endif

static const struct net_device_ops bnad_netdev_ops = {
	.ndo_open		= bnad_open,
	.ndo_stop		= bnad_stop,
	.ndo_start_xmit		= bnad_start_xmit,
	.ndo_get_stats64		= bnad_get_stats64,
	.ndo_set_rx_mode	= bnad_set_rx_mode,
	.ndo_set_multicast_list = bnad_set_rx_mode,
	.ndo_validate_addr      = eth_validate_addr,
	.ndo_set_mac_address    = bnad_set_mac_address,
	.ndo_change_mtu		= bnad_change_mtu,
	.ndo_vlan_rx_register   = bnad_vlan_rx_register,
	.ndo_vlan_rx_add_vid    = bnad_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid   = bnad_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller    = bnad_netpoll
#endif
};

static void
bnad_netdev_init(struct bnad *bnad, bool using_dac)
{
	struct net_device *netdev = bnad->netdev;

	netdev->features |= NETIF_F_IPV6_CSUM;
	netdev->features |= NETIF_F_TSO;
	netdev->features |= NETIF_F_TSO6;

	netdev->features |= NETIF_F_GRO;
	pr_warn("bna: GRO enabled, using kernel stack GRO\n");

	netdev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;

	if (using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

	netdev->features |=
		NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
		NETIF_F_HW_VLAN_FILTER;

	netdev->vlan_features = netdev->features;
	netdev->mem_start = bnad->mmio_start;
	netdev->mem_end = bnad->mmio_start + bnad->mmio_len - 1;

	netdev->netdev_ops = &bnad_netdev_ops;
	bnad_set_ethtool_ops(netdev);
}

/*
 * 1. Initialize the bnad structure
 * 2. Setup netdev pointer in pci_dev
 * 3. Initialze Tx free tasklet
 * 4. Initialize no. of TxQ & CQs & MSIX vectors
 */
static int
bnad_init(struct bnad *bnad,
	  struct pci_dev *pdev, struct net_device *netdev)
{
	unsigned long flags;

	SET_NETDEV_DEV(netdev, &pdev->dev);
	pci_set_drvdata(pdev, netdev);

	bnad->netdev = netdev;
	bnad->pcidev = pdev;
	bnad->mmio_start = pci_resource_start(pdev, 0);
	bnad->mmio_len = pci_resource_len(pdev, 0);
	bnad->bar0 = ioremap_nocache(bnad->mmio_start, bnad->mmio_len);
	if (!bnad->bar0) {
		dev_err(&pdev->dev, "ioremap for bar0 failed\n");
		pci_set_drvdata(pdev, NULL);
		return -ENOMEM;
	}
	pr_info("bar0 mapped to %p, len %llu\n", bnad->bar0,
	       (unsigned long long) bnad->mmio_len);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	if (!bnad_msix_disable)
		bnad->cfg_flags = BNAD_CF_MSIX;

	bnad->cfg_flags |= BNAD_CF_DIM_ENABLED;

	bnad_q_num_init(bnad);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	bnad->msix_num = (bnad->num_tx * bnad->num_txq_per_tx) +
		(bnad->num_rx * bnad->num_rxp_per_rx) +
			 BNAD_MAILBOX_MSIX_VECTORS;

	bnad->txq_depth = BNAD_TXQ_DEPTH;
	bnad->rxq_depth = BNAD_RXQ_DEPTH;
	bnad->rx_csum = true;

	bnad->tx_coalescing_timeo = BFI_TX_COALESCING_TIMEO;
	bnad->rx_coalescing_timeo = BFI_RX_COALESCING_TIMEO;

	tasklet_init(&bnad->tx_free_tasklet, bnad_tx_free_tasklet,
		     (unsigned long)bnad);

	return 0;
}

/*
 * Must be called after bnad_pci_uninit()
 * so that iounmap() and pci_set_drvdata(NULL)
 * happens only after PCI uninitialization.
 */
static void
bnad_uninit(struct bnad *bnad)
{
	if (bnad->bar0)
		iounmap(bnad->bar0);
	pci_set_drvdata(bnad->pcidev, NULL);
}

/*
 * Initialize locks
	a) Per device mutes used for serializing configuration
	   changes from OS interface
	b) spin lock used to protect bna state machine
 */
static void
bnad_lock_init(struct bnad *bnad)
{
	spin_lock_init(&bnad->bna_lock);
	mutex_init(&bnad->conf_mutex);
}

static void
bnad_lock_uninit(struct bnad *bnad)
{
	mutex_destroy(&bnad->conf_mutex);
}

/* PCI Initialization */
static int
bnad_pci_init(struct bnad *bnad,
	      struct pci_dev *pdev, bool *using_dac)
{
	int err;

	err = pci_enable_device(pdev);
	if (err)
		return err;
	err = pci_request_regions(pdev, BNAD_NAME);
	if (err)
		goto disable_device;
	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
	    !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
		*using_dac = 1;
	} else {
		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (err) {
			err = pci_set_consistent_dma_mask(pdev,
						DMA_BIT_MASK(32));
			if (err)
				goto release_regions;
		}
		*using_dac = 0;
	}
	pci_set_master(pdev);
	return 0;

release_regions:
	pci_release_regions(pdev);
disable_device:
	pci_disable_device(pdev);

	return err;
}

static void
bnad_pci_uninit(struct pci_dev *pdev)
{
	pci_release_regions(pdev);
	pci_disable_device(pdev);
}

static int __devinit
bnad_pci_probe(struct pci_dev *pdev,
		const struct pci_device_id *pcidev_id)
{
	bool 	using_dac;
	int 	err;
	struct bnad *bnad;
	struct bna *bna;
	struct net_device *netdev;
	struct bfa_pcidev pcidev_info;
	unsigned long flags;

	pr_info("bnad_pci_probe : (0x%p, 0x%p) PCI Func : (%d)\n",
	       pdev, pcidev_id, PCI_FUNC(pdev->devfn));

	mutex_lock(&bnad_fwimg_mutex);
	if (!cna_get_firmware_buf(pdev)) {
		mutex_unlock(&bnad_fwimg_mutex);
		pr_warn("Failed to load Firmware Image!\n");
		return -ENODEV;
	}
	mutex_unlock(&bnad_fwimg_mutex);

	/*
	 * Allocates sizeof(struct net_device + struct bnad)
	 * bnad = netdev->priv
	 */
	netdev = alloc_etherdev(sizeof(struct bnad));
	if (!netdev) {
		dev_err(&pdev->dev, "alloc_etherdev failed\n");
		err = -ENOMEM;
		return err;
	}
	bnad = netdev_priv(netdev);

	/*
	 * PCI initialization
	 * 	Output : using_dac = 1 for 64 bit DMA
	 *			   = 0 for 32 bit DMA
	 */
	err = bnad_pci_init(bnad, pdev, &using_dac);
	if (err)
		goto free_netdev;

	bnad_lock_init(bnad);
	/*
	 * Initialize bnad structure
	 * Setup relation between pci_dev & netdev
	 * Init Tx free tasklet
	 */
	err = bnad_init(bnad, pdev, netdev);
	if (err)
		goto pci_uninit;
	/* Initialize netdev structure, set up ethtool ops */
	bnad_netdev_init(bnad, using_dac);

	/* Set link to down state */
	netif_carrier_off(netdev);

	bnad_enable_msix(bnad);

	/* Get resource requirement form bna */
	bna_res_req(&bnad->res_info[0]);

	/* Allocate resources from bna */
	err = bnad_res_alloc(bnad);
	if (err)
		goto free_netdev;

	bna = &bnad->bna;

	/* Setup pcidev_info for bna_init() */
	pcidev_info.pci_slot = PCI_SLOT(bnad->pcidev->devfn);
	pcidev_info.pci_func = PCI_FUNC(bnad->pcidev->devfn);
	pcidev_info.device_id = bnad->pcidev->device;
	pcidev_info.pci_bar_kva = bnad->bar0;

	mutex_lock(&bnad->conf_mutex);

	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_init(bna, bnad, &pcidev_info, &bnad->res_info[0]);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	bnad->stats.bna_stats = &bna->stats;

	/* Set up timers */
	setup_timer(&bnad->bna.device.ioc.ioc_timer, bnad_ioc_timeout,
				((unsigned long)bnad));
	setup_timer(&bnad->bna.device.ioc.hb_timer, bnad_ioc_hb_check,
				((unsigned long)bnad));
	setup_timer(&bnad->bna.device.ioc.sem_timer, bnad_ioc_sem_timeout,
				((unsigned long)bnad));

	/* Now start the timer before calling IOC */
	mod_timer(&bnad->bna.device.ioc.ioc_timer,
		  jiffies + msecs_to_jiffies(BNA_IOC_TIMER_FREQ));

	/*
	 * Start the chip
	 * Don't care even if err != 0, bna state machine will
	 * deal with it
	 */
	err = bnad_device_enable(bnad);

	/* Get the burnt-in mac */
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_port_mac_get(&bna->port, &bnad->perm_addr);
	bnad_set_netdev_perm_addr(bnad);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);

	mutex_unlock(&bnad->conf_mutex);

	/* Finally, reguister with net_device layer */
	err = register_netdev(netdev);
	if (err) {
		pr_err("BNA : Registering with netdev failed\n");
		goto disable_device;
	}

	return 0;

disable_device:
	mutex_lock(&bnad->conf_mutex);
	bnad_device_disable(bnad);
	del_timer_sync(&bnad->bna.device.ioc.ioc_timer);
	del_timer_sync(&bnad->bna.device.ioc.sem_timer);
	del_timer_sync(&bnad->bna.device.ioc.hb_timer);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_uninit(bna);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	mutex_unlock(&bnad->conf_mutex);

	bnad_res_free(bnad);
	bnad_disable_msix(bnad);
pci_uninit:
	bnad_pci_uninit(pdev);
	bnad_lock_uninit(bnad);
	bnad_uninit(bnad);
free_netdev:
	free_netdev(netdev);
	return err;
}

static void __devexit
bnad_pci_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct bnad *bnad;
	struct bna *bna;
	unsigned long flags;

	if (!netdev)
		return;

	pr_info("%s bnad_pci_remove\n", netdev->name);
	bnad = netdev_priv(netdev);
	bna = &bnad->bna;

	unregister_netdev(netdev);

	mutex_lock(&bnad->conf_mutex);
	bnad_device_disable(bnad);
	del_timer_sync(&bnad->bna.device.ioc.ioc_timer);
	del_timer_sync(&bnad->bna.device.ioc.sem_timer);
	del_timer_sync(&bnad->bna.device.ioc.hb_timer);
	spin_lock_irqsave(&bnad->bna_lock, flags);
	bna_uninit(bna);
	spin_unlock_irqrestore(&bnad->bna_lock, flags);
	mutex_unlock(&bnad->conf_mutex);

	bnad_res_free(bnad);
	bnad_disable_msix(bnad);
	bnad_pci_uninit(pdev);
	bnad_lock_uninit(bnad);
	bnad_uninit(bnad);
	free_netdev(netdev);
}

static const struct pci_device_id bnad_pci_id_table[] = {
	{
		PCI_DEVICE(PCI_VENDOR_ID_BROCADE,
			PCI_DEVICE_ID_BROCADE_CT),
		.class = PCI_CLASS_NETWORK_ETHERNET << 8,
		.class_mask =  0xffff00
	}, {0,  }
};

MODULE_DEVICE_TABLE(pci, bnad_pci_id_table);

static struct pci_driver bnad_pci_driver = {
	.name = BNAD_NAME,
	.id_table = bnad_pci_id_table,
	.probe = bnad_pci_probe,
	.remove = __devexit_p(bnad_pci_remove),
};

static int __init
bnad_module_init(void)
{
	int err;

	pr_info("Brocade 10G Ethernet driver\n");

	bfa_nw_ioc_auto_recover(bnad_ioc_auto_recover);

	err = pci_register_driver(&bnad_pci_driver);
	if (err < 0) {
		pr_err("bna : PCI registration failed in module init "
		       "(%d)\n", err);
		return err;
	}

	return 0;
}

static void __exit
bnad_module_exit(void)
{
	pci_unregister_driver(&bnad_pci_driver);

	if (bfi_fw)
		release_firmware(bfi_fw);
}

module_init(bnad_module_init);
module_exit(bnad_module_exit);

MODULE_AUTHOR("Brocade");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Brocade 10G PCIe Ethernet driver");
MODULE_VERSION(BNAD_VERSION);
MODULE_FIRMWARE(CNA_FW_FILE_CT);