path: root/drivers/net/bnx2x/bnx2x_cmn.c

/* bnx2x_cmn.c: Broadcom Everest network driver.
 *
 * Copyright (c) 2007-2011 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 *
 * Maintained by: Eilon Greenstein <eilong@broadcom.com>
 * Written by: Eliezer Tamir
 * Based on code from Michael Chan's bnx2 driver
 * UDP CSUM errata workaround by Arik Gendelman
 * Slowpath and fastpath rework by Vladislav Zolotarov
 * Statistics and Link management by Yitchak Gertner
 *
 */

#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <net/ipv6.h>
#include <net/ip6_checksum.h>
#include <linux/firmware.h>
#include <linux/prefetch.h>
#include "bnx2x_cmn.h"
#include "bnx2x_init.h"
#include "bnx2x_sp.h"



/**
 * bnx2x_bz_fp - zero content of the fastpath structure.
 *
 * @bp:		driver handle
 * @index:	fastpath index to be zeroed
 *
 * Makes sure the contents of the bp->fp[index].napi is kept
 * intact.
 */
static inline void bnx2x_bz_fp(struct bnx2x *bp, int index)
{
	struct bnx2x_fastpath *fp = &bp->fp[index];
	struct napi_struct orig_napi = fp->napi;
	/* bzero bnx2x_fastpath contents */
	memset(fp, 0, sizeof(*fp));

	/* Restore the NAPI object as it has been already initialized */
	fp->napi = orig_napi;
}

/**
 * bnx2x_move_fp - move content of the fastpath structure.
 *
 * @bp:		driver handle
 * @from:	source FP index
 * @to:		destination FP index
 *
 * Makes sure the contents of the bp->fp[to].napi is kept
 * intact.
 */
static inline void bnx2x_move_fp(struct bnx2x *bp, int from, int to)
{
	struct bnx2x_fastpath *from_fp = &bp->fp[from];
	struct bnx2x_fastpath *to_fp = &bp->fp[to];
	struct napi_struct orig_napi = to_fp->napi;
	/* Move bnx2x_fastpath contents */
	memcpy(to_fp, from_fp, sizeof(*to_fp));
	to_fp->index = to;

	/* Restore the NAPI object as it has been already initialized */
	to_fp->napi = orig_napi;
}

int load_count[2][3] = { {0} }; /* per-path: 0-common, 1-port0, 2-port1 */

/* free skb in the packet ring at pos idx
 * return idx of last bd freed
 */
static u16 bnx2x_free_tx_pkt(struct bnx2x *bp, struct bnx2x_fastpath *fp,
			     u16 idx)
{
	struct sw_tx_bd *tx_buf = &fp->tx_buf_ring[idx];
	struct eth_tx_start_bd *tx_start_bd;
	struct eth_tx_bd *tx_data_bd;
	struct sk_buff *skb = tx_buf->skb;
	u16 bd_idx = TX_BD(tx_buf->first_bd), new_cons;
	int nbd;

	/* prefetch skb end pointer to speedup dev_kfree_skb() */
	prefetch(&skb->end);

	DP(BNX2X_MSG_FP, "fp[%d]: pkt_idx %d  buff @(%p)->skb %p\n",
	   fp->index, idx, tx_buf, skb);

	/* unmap first bd */
	DP(BNX2X_MSG_OFF, "free bd_idx %d\n", bd_idx);
	tx_start_bd = &fp->tx_desc_ring[bd_idx].start_bd;
	dma_unmap_single(&bp->pdev->dev, BD_UNMAP_ADDR(tx_start_bd),
			 BD_UNMAP_LEN(tx_start_bd), DMA_TO_DEVICE);


	nbd = le16_to_cpu(tx_start_bd->nbd) - 1;
#ifdef BNX2X_STOP_ON_ERROR
	if ((nbd - 1) > (MAX_SKB_FRAGS + 2)) {
		BNX2X_ERR("BAD nbd!\n");
		bnx2x_panic();
	}
#endif
	new_cons = nbd + tx_buf->first_bd;

	/* Get the next bd */
	bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));

	/* Skip a parse bd... */
	--nbd;
	bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));

	/* ...and the TSO split header bd since they have no mapping */
	if (tx_buf->flags & BNX2X_TSO_SPLIT_BD) {
		--nbd;
		bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
	}

	/* now free frags */
	while (nbd > 0) {

		DP(BNX2X_MSG_OFF, "free frag bd_idx %d\n", bd_idx);
		tx_data_bd = &fp->tx_desc_ring[bd_idx].reg_bd;
		dma_unmap_page(&bp->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
			       BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
		if (--nbd)
			bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
	}

	/* release skb */
	WARN_ON(!skb);
	dev_kfree_skb_any(skb);
	tx_buf->first_bd = 0;
	tx_buf->skb = NULL;

	return new_cons;
}

int bnx2x_tx_int(struct bnx2x_fastpath *fp)
{
	struct bnx2x *bp = fp->bp;
	struct netdev_queue *txq;
	u16 hw_cons, sw_cons, bd_cons = fp->tx_bd_cons;

#ifdef BNX2X_STOP_ON_ERROR
	if (unlikely(bp->panic))
		return -1;
#endif

	txq = netdev_get_tx_queue(bp->dev, fp->index);
	hw_cons = le16_to_cpu(*fp->tx_cons_sb);
	sw_cons = fp->tx_pkt_cons;

	while (sw_cons != hw_cons) {
		u16 pkt_cons;

		pkt_cons = TX_BD(sw_cons);

		DP(NETIF_MSG_TX_DONE, "queue[%d]: hw_cons %u  sw_cons %u "
				      " pkt_cons %u\n",
		   fp->index, hw_cons, sw_cons, pkt_cons);

		bd_cons = bnx2x_free_tx_pkt(bp, fp, pkt_cons);
		sw_cons++;
	}

	fp->tx_pkt_cons = sw_cons;
	fp->tx_bd_cons = bd_cons;

	/* Need to make the tx_bd_cons update visible to start_xmit()
	 * before checking for netif_tx_queue_stopped().  Without the
	 * memory barrier, there is a small possibility that
	 * start_xmit() will miss it and cause the queue to be stopped
	 * forever.
	 * On the other hand we need an rmb() here to ensure the proper
	 * ordering of bit testing in the following
	 * netif_tx_queue_stopped(txq) call.
	 */
	smp_mb();

	if (unlikely(netif_tx_queue_stopped(txq))) {
		/* Taking tx_lock() is needed to prevent reenabling the queue
		 * while it's empty. This could have happen if rx_action() gets
		 * suspended in bnx2x_tx_int() after the condition before
		 * netif_tx_wake_queue(), while tx_action (bnx2x_start_xmit()):
		 *
		 * stops the queue->sees fresh tx_bd_cons->releases the queue->
		 * sends some packets consuming the whole queue again->
		 * stops the queue
		 */

		__netif_tx_lock(txq, smp_processor_id());

		if ((netif_tx_queue_stopped(txq)) &&
		    (bp->state == BNX2X_STATE_OPEN) &&
		    (bnx2x_tx_avail(fp) >= MAX_SKB_FRAGS + 3))
			netif_tx_wake_queue(txq);

		__netif_tx_unlock(txq);
	}
	return 0;
}

static inline void bnx2x_update_last_max_sge(struct bnx2x_fastpath *fp,
					     u16 idx)
{
	u16 last_max = fp->last_max_sge;

	if (SUB_S16(idx, last_max) > 0)
		fp->last_max_sge = idx;
}

static void bnx2x_update_sge_prod(struct bnx2x_fastpath *fp,
				  struct eth_fast_path_rx_cqe *fp_cqe)
{
	struct bnx2x *bp = fp->bp;
	u16 sge_len = SGE_PAGE_ALIGN(le16_to_cpu(fp_cqe->pkt_len) -
				     le16_to_cpu(fp_cqe->len_on_bd)) >>
		      SGE_PAGE_SHIFT;
	u16 last_max, last_elem, first_elem;
	u16 delta = 0;
	u16 i;

	if (!sge_len)
		return;

	/* First mark all used pages */
	for (i = 0; i < sge_len; i++)
		BIT_VEC64_CLEAR_BIT(fp->sge_mask,
			RX_SGE(le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[i])));

	DP(NETIF_MSG_RX_STATUS, "fp_cqe->sgl[%d] = %d\n",
	   sge_len - 1, le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[sge_len - 1]));

	/* Here we assume that the last SGE index is the biggest */
	prefetch((void *)(fp->sge_mask));
	bnx2x_update_last_max_sge(fp,
		le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[sge_len - 1]));

	last_max = RX_SGE(fp->last_max_sge);
	last_elem = last_max >> BIT_VEC64_ELEM_SHIFT;
	first_elem = RX_SGE(fp->rx_sge_prod) >> BIT_VEC64_ELEM_SHIFT;

	/* If ring is not full */
	if (last_elem + 1 != first_elem)
		last_elem++;

	/* Now update the prod */
	for (i = first_elem; i != last_elem; i = NEXT_SGE_MASK_ELEM(i)) {
		if (likely(fp->sge_mask[i]))
			break;

		fp->sge_mask[i] = BIT_VEC64_ELEM_ONE_MASK;
		delta += BIT_VEC64_ELEM_SZ;
	}

	if (delta > 0) {
		fp->rx_sge_prod += delta;
		/* clear page-end entries */
		bnx2x_clear_sge_mask_next_elems(fp);
	}

	DP(NETIF_MSG_RX_STATUS,
	   "fp->last_max_sge = %d  fp->rx_sge_prod = %d\n",
	   fp->last_max_sge, fp->rx_sge_prod);
}

static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue,
			    struct sk_buff *skb, u16 cons, u16 prod,
			    struct eth_fast_path_rx_cqe *cqe)
{
	struct bnx2x *bp = fp->bp;
	struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
	struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod];
	struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod];
	dma_addr_t mapping;
	struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
	struct sw_rx_bd *first_buf = &tpa_info->first_buf;

	/* print error if current state != stop */
	if (tpa_info->tpa_state != BNX2X_TPA_STOP)
		BNX2X_ERR("start of bin not in stop [%d]\n", queue);

	/* Try to map an empty skb from the aggregation info  */
	mapping = dma_map_single(&bp->pdev->dev,
				 first_buf->skb->data,
				 fp->rx_buf_size, DMA_FROM_DEVICE);
	/*
	 *  ...if it fails - move the skb from the consumer to the producer
	 *  and set the current aggregation state as ERROR to drop it
	 *  when TPA_STOP arrives.
	 */

	if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
		/* Move the BD from the consumer to the producer */
		bnx2x_reuse_rx_skb(fp, cons, prod);
		tpa_info->tpa_state = BNX2X_TPA_ERROR;
		return;
	}

	/* move empty skb from pool to prod */
	prod_rx_buf->skb = first_buf->skb;
	dma_unmap_addr_set(prod_rx_buf, mapping, mapping);
	/* point prod_bd to new skb */
	prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
	prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping));

	/* move partial skb from cons to pool (don't unmap yet) */
	*first_buf = *cons_rx_buf;

	/* mark bin state as START */
	tpa_info->parsing_flags =
		le16_to_cpu(cqe->pars_flags.flags);
	tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
	tpa_info->tpa_state = BNX2X_TPA_START;
	tpa_info->len_on_bd = le16_to_cpu(cqe->len_on_bd);
	tpa_info->placement_offset = cqe->placement_offset;

#ifdef BNX2X_STOP_ON_ERROR
	fp->tpa_queue_used |= (1 << queue);
#ifdef _ASM_GENERIC_INT_L64_H
	DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%lx\n",
#else
	DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%llx\n",
#endif
	   fp->tpa_queue_used);
#endif
}

/* Timestamp option length allowed for TPA aggregation:
 *
 *		nop nop kind length echo val
 */
#define TPA_TSTAMP_OPT_LEN	12
/**
 * bnx2x_set_lro_mss - calculate the approximate value of the MSS
 *
 * @bp:			driver handle
 * @parsing_flags:	parsing flags from the START CQE
 * @len_on_bd:		total length of the first packet for the
 *			aggregation.
 *
 * Approximate value of the MSS for this aggregation calculated using
 * the first packet of it.
 */
static inline u16 bnx2x_set_lro_mss(struct bnx2x *bp, u16 parsing_flags,
				    u16 len_on_bd)
{
	/*
	 * TPA arrgregation won't have either IP options or TCP options
	 * other than timestamp or IPv6 extension headers.
	 */
	u16 hdrs_len = ETH_HLEN + sizeof(struct tcphdr);

	if (GET_FLAG(parsing_flags, PARSING_FLAGS_OVER_ETHERNET_PROTOCOL) ==
	    PRS_FLAG_OVERETH_IPV6)
		hdrs_len += sizeof(struct ipv6hdr);
	else /* IPv4 */
		hdrs_len += sizeof(struct iphdr);


	/* Check if there was a TCP timestamp, if there is it's will
	 * always be 12 bytes length: nop nop kind length echo val.
	 *
	 * Otherwise FW would close the aggregation.
	 */
	if (parsing_flags & PARSING_FLAGS_TIME_STAMP_EXIST_FLAG)
		hdrs_len += TPA_TSTAMP_OPT_LEN;

	return len_on_bd - hdrs_len;
}

static int bnx2x_fill_frag_skb(struct bnx2x *bp, struct bnx2x_fastpath *fp,
			       u16 queue, struct sk_buff *skb,
			       struct eth_end_agg_rx_cqe *cqe,
			       u16 cqe_idx)
{
	struct sw_rx_page *rx_pg, old_rx_pg;
	u32 i, frag_len, frag_size, pages;
	int err;
	int j;
	struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
	u16 len_on_bd = tpa_info->len_on_bd;

	frag_size = le16_to_cpu(cqe->pkt_len) - len_on_bd;
	pages = SGE_PAGE_ALIGN(frag_size) >> SGE_PAGE_SHIFT;

	/* This is needed in order to enable forwarding support */
	if (frag_size)
		skb_shinfo(skb)->gso_size = bnx2x_set_lro_mss(bp,
					tpa_info->parsing_flags, len_on_bd);

#ifdef BNX2X_STOP_ON_ERROR
	if (pages > min_t(u32, 8, MAX_SKB_FRAGS)*SGE_PAGE_SIZE*PAGES_PER_SGE) {
		BNX2X_ERR("SGL length is too long: %d. CQE index is %d\n",
			  pages, cqe_idx);
		BNX2X_ERR("cqe->pkt_len = %d\n", cqe->pkt_len);
		bnx2x_panic();
		return -EINVAL;
	}
#endif

	/* Run through the SGL and compose the fragmented skb */
	for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) {
		u16 sge_idx = RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[j]));

		/* FW gives the indices of the SGE as if the ring is an array
		   (meaning that "next" element will consume 2 indices) */
		frag_len = min(frag_size, (u32)(SGE_PAGE_SIZE*PAGES_PER_SGE));
		rx_pg = &fp->rx_page_ring[sge_idx];
		old_rx_pg = *rx_pg;

		/* If we fail to allocate a substitute page, we simply stop
		   where we are and drop the whole packet */
		err = bnx2x_alloc_rx_sge(bp, fp, sge_idx);
		if (unlikely(err)) {
			fp->eth_q_stats.rx_skb_alloc_failed++;
			return err;
		}

		/* Unmap the page as we r going to pass it to the stack */
		dma_unmap_page(&bp->pdev->dev,
			       dma_unmap_addr(&old_rx_pg, mapping),
			       SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE);

		/* Add one frag and update the appropriate fields in the skb */
		skb_fill_page_desc(skb, j, old_rx_pg.page, 0, frag_len);

		skb->data_len += frag_len;
		skb->truesize += frag_len;
		skb->len += frag_len;

		frag_size -= frag_len;
	}

	return 0;
}

static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
			   u16 queue, struct eth_end_agg_rx_cqe *cqe,
			   u16 cqe_idx)
{
	struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
	struct sw_rx_bd *rx_buf = &tpa_info->first_buf;
	u8 pad = tpa_info->placement_offset;
	u16 len = tpa_info->len_on_bd;
	struct sk_buff *skb = rx_buf->skb;
	/* alloc new skb */
	struct sk_buff *new_skb;
	u8 old_tpa_state = tpa_info->tpa_state;

	tpa_info->tpa_state = BNX2X_TPA_STOP;

	/* If we there was an error during the handling of the TPA_START -
	 * drop this aggregation.
	 */
	if (old_tpa_state == BNX2X_TPA_ERROR)
		goto drop;

	/* Try to allocate the new skb */
	new_skb = netdev_alloc_skb(bp->dev, fp->rx_buf_size);

	/* Unmap skb in the pool anyway, as we are going to change
	   pool entry status to BNX2X_TPA_STOP even if new skb allocation
	   fails. */
	dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping),
			 fp->rx_buf_size, DMA_FROM_DEVICE);

	if (likely(new_skb)) {
		prefetch(skb);
		prefetch(((char *)(skb)) + L1_CACHE_BYTES);

#ifdef BNX2X_STOP_ON_ERROR
		if (pad + len > fp->rx_buf_size) {
			BNX2X_ERR("skb_put is about to fail...  "
				  "pad %d  len %d  rx_buf_size %d\n",
				  pad, len, fp->rx_buf_size);
			bnx2x_panic();
			return;
		}
#endif

		skb_reserve(skb, pad);
		skb_put(skb, len);

		skb->protocol = eth_type_trans(skb, bp->dev);
		skb->ip_summed = CHECKSUM_UNNECESSARY;

		if (!bnx2x_fill_frag_skb(bp, fp, queue, skb, cqe, cqe_idx)) {
			if (tpa_info->parsing_flags & PARSING_FLAGS_VLAN)
				__vlan_hwaccel_put_tag(skb, tpa_info->vlan_tag);
			napi_gro_receive(&fp->napi, skb);
		} else {
			DP(NETIF_MSG_RX_STATUS, "Failed to allocate new pages"
			   " - dropping packet!\n");
			dev_kfree_skb_any(skb);
		}


		/* put new skb in bin */
		rx_buf->skb = new_skb;

		return;
	}

drop:
	/* drop the packet and keep the buffer in the bin */
	DP(NETIF_MSG_RX_STATUS,
	   "Failed to allocate or map a new skb - dropping packet!\n");
	fp->eth_q_stats.rx_skb_alloc_failed++;
}

/* Set Toeplitz hash value in the skb using the value from the
 * CQE (calculated by HW).
 */
static inline void bnx2x_set_skb_rxhash(struct bnx2x *bp, union eth_rx_cqe *cqe,
					struct sk_buff *skb)
{
	/* Set Toeplitz hash from CQE */
	if ((bp->dev->features & NETIF_F_RXHASH) &&
	    (cqe->fast_path_cqe.status_flags &
	     ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
		skb->rxhash =
		le32_to_cpu(cqe->fast_path_cqe.rss_hash_result);
}

int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
{
	struct bnx2x *bp = fp->bp;
	u16 bd_cons, bd_prod, bd_prod_fw, comp_ring_cons;
	u16 hw_comp_cons, sw_comp_cons, sw_comp_prod;
	int rx_pkt = 0;

#ifdef BNX2X_STOP_ON_ERROR
	if (unlikely(bp->panic))
		return 0;
#endif

	/* CQ "next element" is of the size of the regular element,
	   that's why it's ok here */
	hw_comp_cons = le16_to_cpu(*fp->rx_cons_sb);
	if ((hw_comp_cons & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT)
		hw_comp_cons++;

	bd_cons = fp->rx_bd_cons;
	bd_prod = fp->rx_bd_prod;
	bd_prod_fw = bd_prod;
	sw_comp_cons = fp->rx_comp_cons;
	sw_comp_prod = fp->rx_comp_prod;

	/* Memory barrier necessary as speculative reads of the rx
	 * buffer can be ahead of the index in the status block
	 */
	rmb();

	DP(NETIF_MSG_RX_STATUS,
	   "queue[%d]:  hw_comp_cons %u  sw_comp_cons %u\n",
	   fp->index, hw_comp_cons, sw_comp_cons);

	while (sw_comp_cons != hw_comp_cons) {
		struct sw_rx_bd *rx_buf = NULL;
		struct sk_buff *skb;
		union eth_rx_cqe *cqe;
		struct eth_fast_path_rx_cqe *cqe_fp;
		u8 cqe_fp_flags;
		enum eth_rx_cqe_type cqe_fp_type;
		u16 len, pad;

#ifdef BNX2X_STOP_ON_ERROR
		if (unlikely(bp->panic))
			return 0;
#endif

		comp_ring_cons = RCQ_BD(sw_comp_cons);
		bd_prod = RX_BD(bd_prod);
		bd_cons = RX_BD(bd_cons);

		/* Prefetch the page containing the BD descriptor
		   at producer's index. It will be needed when new skb is
		   allocated */
		prefetch((void *)(PAGE_ALIGN((unsigned long)
					     (&fp->rx_desc_ring[bd_prod])) -
				  PAGE_SIZE + 1));

		cqe = &fp->rx_comp_ring[comp_ring_cons];
		cqe_fp = &cqe->fast_path_cqe;
		cqe_fp_flags = cqe_fp->type_error_flags;
		cqe_fp_type = cqe_fp_flags & ETH_FAST_PATH_RX_CQE_TYPE;

		DP(NETIF_MSG_RX_STATUS, "CQE type %x  err %x  status %x"
		   "  queue %x  vlan %x  len %u\n", CQE_TYPE(cqe_fp_flags),
		   cqe_fp_flags, cqe_fp->status_flags,
		   le32_to_cpu(cqe_fp->rss_hash_result),
		   le16_to_cpu(cqe_fp->vlan_tag), le16_to_cpu(cqe_fp->pkt_len));

		/* is this a slowpath msg? */
		if (unlikely(CQE_TYPE_SLOW(cqe_fp_type))) {
			bnx2x_sp_event(fp, cqe);
			goto next_cqe;

		/* this is an rx packet */
		} else {
			rx_buf = &fp->rx_buf_ring[bd_cons];
			skb = rx_buf->skb;
			prefetch(skb);

			if (!CQE_TYPE_FAST(cqe_fp_type)) {
#ifdef BNX2X_STOP_ON_ERROR
				/* sanity check */
				if (fp->disable_tpa &&
				    (CQE_TYPE_START(cqe_fp_type) ||
				     CQE_TYPE_STOP(cqe_fp_type)))
					BNX2X_ERR("START/STOP packet while "
						  "disable_tpa type %x\n",
						  CQE_TYPE(cqe_fp_type));
#endif

				if (CQE_TYPE_START(cqe_fp_type)) {
					u16 queue = cqe_fp->queue_index;
					DP(NETIF_MSG_RX_STATUS,
					   "calling tpa_start on queue %d\n",
					   queue);

					bnx2x_tpa_start(fp, queue, skb,
							bd_cons, bd_prod,
							cqe_fp);

					/* Set Toeplitz hash for LRO skb */
					bnx2x_set_skb_rxhash(bp, cqe, skb);

					goto next_rx;

				} else {
					u16 queue =
						cqe->end_agg_cqe.queue_index;
					DP(NETIF_MSG_RX_STATUS,
					   "calling tpa_stop on queue %d\n",
					   queue);

					bnx2x_tpa_stop(bp, fp, queue,
						       &cqe->end_agg_cqe,
						       comp_ring_cons);
#ifdef BNX2X_STOP_ON_ERROR
					if (bp->panic)
						return 0;
#endif

					bnx2x_update_sge_prod(fp, cqe_fp);
					goto next_cqe;
				}
			}
			/* non TPA */
			len = le16_to_cpu(cqe_fp->pkt_len);
			pad = cqe_fp->placement_offset;
			dma_sync_single_for_device(&bp->pdev->dev,
					dma_unmap_addr(rx_buf, mapping),
						       pad + RX_COPY_THRESH,
						       DMA_FROM_DEVICE);
			prefetch(((char *)(skb)) + L1_CACHE_BYTES);

			/* is this an error packet? */
			if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
				DP(NETIF_MSG_RX_ERR,
				   "ERROR  flags %x  rx packet %u\n",
				   cqe_fp_flags, sw_comp_cons);
				fp->eth_q_stats.rx_err_discard_pkt++;
				goto reuse_rx;
			}

			/* Since we don't have a jumbo ring
			 * copy small packets if mtu > 1500
			 */
			if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
			    (len <= RX_COPY_THRESH)) {
				struct sk_buff *new_skb;

				new_skb = netdev_alloc_skb(bp->dev, len + pad);
				if (new_skb == NULL) {
					DP(NETIF_MSG_RX_ERR,
					   "ERROR  packet dropped "
					   "because of alloc failure\n");
					fp->eth_q_stats.rx_skb_alloc_failed++;
					goto reuse_rx;
				}

				/* aligned copy */
				skb_copy_from_linear_data_offset(skb, pad,
						    new_skb->data + pad, len);
				skb_reserve(new_skb, pad);
				skb_put(new_skb, len);

				bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);

				skb = new_skb;

			} else
			if (likely(bnx2x_alloc_rx_skb(bp, fp, bd_prod) == 0)) {
				dma_unmap_single(&bp->pdev->dev,
					dma_unmap_addr(rx_buf, mapping),
						 fp->rx_buf_size,
						 DMA_FROM_DEVICE);
				skb_reserve(skb, pad);
				skb_put(skb, len);

			} else {
				DP(NETIF_MSG_RX_ERR,
				   "ERROR  packet dropped because "
				   "of alloc failure\n");
				fp->eth_q_stats.rx_skb_alloc_failed++;
reuse_rx:
				bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);
				goto next_rx;
			}

			skb->protocol = eth_type_trans(skb, bp->dev);

			/* Set Toeplitz hash for a none-LRO skb */
			bnx2x_set_skb_rxhash(bp, cqe, skb);

			skb_checksum_none_assert(skb);

			if (bp->dev->features & NETIF_F_RXCSUM) {

				if (likely(BNX2X_RX_CSUM_OK(cqe)))
					skb->ip_summed = CHECKSUM_UNNECESSARY;
				else
					fp->eth_q_stats.hw_csum_err++;
			}
		}

		skb_record_rx_queue(skb, fp->index);

		if (le16_to_cpu(cqe_fp->pars_flags.flags) &
		    PARSING_FLAGS_VLAN)
			__vlan_hwaccel_put_tag(skb,
					       le16_to_cpu(cqe_fp->vlan_tag));
		napi_gro_receive(&fp->napi, skb);


next_rx:
		rx_buf->skb = NULL;

		bd_cons = NEXT_RX_IDX(bd_cons);
		bd_prod = NEXT_RX_IDX(bd_prod);
		bd_prod_fw = NEXT_RX_IDX(bd_prod_fw);
		rx_pkt++;
next_cqe:
		sw_comp_prod = NEXT_RCQ_IDX(sw_comp_prod);
		sw_comp_cons = NEXT_RCQ_IDX(sw_comp_cons);

		if (rx_pkt == budget)
			break;
	} /* while */

	fp->rx_bd_cons = bd_cons;
	fp->rx_bd_prod = bd_prod_fw;
	fp->rx_comp_cons = sw_comp_cons;
	fp->rx_comp_prod = sw_comp_prod;

	/* Update producers */
	bnx2x_update_rx_prod(bp, fp, bd_prod_fw, sw_comp_prod,
			     fp->rx_sge_prod);

	fp->rx_pkt += rx_pkt;
	fp->rx_calls++;

	return rx_pkt;
}

static irqreturn_t bnx2x_msix_fp_int(int irq, void *fp_cookie)
{
	struct bnx2x_fastpath *fp = fp_cookie;
	struct bnx2x *bp = fp->bp;

	DP(BNX2X_MSG_FP, "got an MSI-X interrupt on IDX:SB "
			 "[fp %d fw_sd %d igusb %d]\n",
	   fp->index, fp->fw_sb_id, fp->igu_sb_id);
	bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID, 0, IGU_INT_DISABLE, 0);

#ifdef BNX2X_STOP_ON_ERROR
	if (unlikely(bp->panic))
		return IRQ_HANDLED;
#endif

	/* Handle Rx and Tx according to MSI-X vector */
	prefetch(fp->rx_cons_sb);
	prefetch(fp->tx_cons_sb);
	prefetch(&fp->sb_running_index[SM_RX_ID]);
	napi_schedule(&bnx2x_fp(bp, fp->index, napi));

	return IRQ_HANDLED;
}

/* HW Lock for shared dual port PHYs */
void bnx2x_acquire_phy_lock(struct bnx2x *bp)
{
	mutex_lock(&bp->port.phy_mutex);

	if (bp->port.need_hw_lock)
		bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
}

void bnx2x_release_phy_lock(struct bnx2x *bp)
{
	if (bp->port.need_hw_lock)
		bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);

	mutex_unlock(&bp->port.phy_mutex);
}

/* calculates MF speed according to current linespeed and MF configuration */
u16 bnx2x_get_mf_speed(struct bnx2x *bp)
{
	u16 line_speed = bp->link_vars.line_speed;
	if (IS_MF(bp)) {
		u16 maxCfg = bnx2x_extract_max_cfg(bp,
						   bp->mf_config[BP_VN(bp)]);

		/* Calculate the current MAX line speed limit for the MF
		 * devices
		 */
		if (IS_MF_SI(bp))
			line_speed = (line_speed * maxCfg) / 100;
		else { /* SD mode */
			u16 vn_max_rate = maxCfg * 100;

			if (vn_max_rate < line_speed)
				line_speed = vn_max_rate;
		}
	}

	return line_speed;
}

/**
 * bnx2x_fill_report_data - fill link report data to report
 *
 * @bp:		driver handle
 * @data:	link state to update
 *
 * It uses a none-atomic bit operations because is called under the mutex.
 */
static inline void bnx2x_fill_report_data(struct bnx2x *bp,
					  struct bnx2x_link_report_data *data)
{
	u16 line_speed = bnx2x_get_mf_speed(bp);

	memset(data, 0, sizeof(*data));

	/* Fill the report data: efective line speed */
	data->line_speed = line_speed;

	/* Link is down */
	if (!bp->link_vars.link_up || (bp->flags & MF_FUNC_DIS))
		__set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
			  &data->link_report_flags);

	/* Full DUPLEX */
	if (bp->link_vars.duplex == DUPLEX_FULL)
		__set_bit(BNX2X_LINK_REPORT_FD, &data->link_report_flags);

	/* Rx Flow Control is ON */
	if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_RX)
		__set_bit(BNX2X_LINK_REPORT_RX_FC_ON, &data->link_report_flags);

	/* Tx Flow Control is ON */
	if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_TX)
		__set_bit(BNX2X_LINK_REPORT_TX_FC_ON, &data->link_report_flags);
}

/**
 * bnx2x_link_report - report link status to OS.
 *
 * @bp:		driver handle
 *
 * Calls the __bnx2x_link_report() under the same locking scheme
 * as a link/PHY state managing code to ensure a consistent link
 * reporting.
 */

void bnx2x_link_report(struct bnx2x *bp)
{
	bnx2x_acquire_phy_lock(bp);
	__bnx2x_link_report(bp);
	bnx2x_release_phy_lock(bp);
}

/**
 * __bnx2x_link_report - report link status to OS.
 *
 * @bp:		driver handle
 *
 * None atomic inmlementation.
 * Should be called under the phy_lock.
 */
void __bnx2x_link_report(struct bnx2x *bp)
{
	struct bnx2x_link_report_data cur_data;

	/* reread mf_cfg */
	if (!CHIP_IS_E1(bp))
		bnx2x_read_mf_cfg(bp);

	/* Read the current link report info */
	bnx2x_fill_report_data(bp, &cur_data);

	/* Don't report link down or exactly the same link status twice */
	if (!memcmp(&cur_data, &bp->last_reported_link, sizeof(cur_data)) ||
	    (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
		      &bp->last_reported_link.link_report_flags) &&
	     test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
		      &cur_data.link_report_flags)))
		return;

	bp->link_cnt++;

	/* We are going to report a new link parameters now -
	 * remember the current data for the next time.
	 */
	memcpy(&bp->last_reported_link, &cur_data, sizeof(cur_data));

	if (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
		     &cur_data.link_report_flags)) {
		netif_carrier_off(bp->dev);
		netdev_err(bp->dev, "NIC Link is Down\n");
		return;
	} else {
		netif_carrier_on(bp->dev);
		netdev_info(bp->dev, "NIC Link is Up, ");
		pr_cont("%d Mbps ", cur_data.line_speed);

		if (test_and_clear_bit(BNX2X_LINK_REPORT_FD,
				       &cur_data.link_report_flags))
			pr_cont("full duplex");
		else
			pr_cont("half duplex");

		/* Handle the FC at the end so that only these flags would be
		 * possibly set. This way we may easily check if there is no FC
		 * enabled.
		 */
		if (cur_data.link_report_flags) {
			if (test_bit(BNX2X_LINK_REPORT_RX_FC_ON,
				     &cur_data.link_report_flags)) {
				pr_cont(", receive ");
				if (test_bit(BNX2X_LINK_REPORT_TX_FC_ON,
				     &cur_data.link_report_flags))
					pr_cont("& transmit ");
			} else {
				pr_cont(", transmit ");
			}
			pr_cont("flow control ON");
		}
		pr_cont("\n");
	}
}

void bnx2x_init_rx_rings(struct bnx2x *bp)
{
	int func = BP_FUNC(bp);
	int max_agg_queues = CHIP_IS_E1(bp) ? ETH_MAX_AGGREGATION_QUEUES_E1 :
					      ETH_MAX_AGGREGATION_QUEUES_E1H_E2;
	u16 ring_prod;
	int i, j;

	/* Allocate TPA resources */
	for_each_rx_queue(bp, j) {
		struct bnx2x_fastpath *fp = &bp->fp[j];

		DP(NETIF_MSG_IFUP,
		   "mtu %d  rx_buf_size %d\n", bp->dev->mtu, fp->rx_buf_size);

		if (!fp->disable_tpa) {
			/* Fill the per-aggregtion pool */
			for (i = 0; i < max_agg_queues; i++) {
				struct bnx2x_agg_info *tpa_info =
					&fp->tpa_info[i];
				struct sw_rx_bd *first_buf =
					&tpa_info->first_buf;

				first_buf->skb = netdev_alloc_skb(bp->dev,
						       fp->rx_buf_size);
				if (!first_buf->skb) {
					BNX2X_ERR("Failed to allocate TPA "
						  "skb pool for queue[%d] - "
						  "disabling TPA on this "
						  "queue!\n", j);
					bnx2x_free_tpa_pool(bp, fp, i);
					fp->disable_tpa = 1;
					break;
				}
				dma_unmap_addr_set(first_buf, mapping, 0);
				tpa_info->tpa_state = BNX2X_TPA_STOP;
			}

			/* "next page" elements initialization */
			bnx2x_set_next_page_sgl(fp);

			/* set SGEs bit mask */
			bnx2x_init_sge_ring_bit_mask(fp);

			/* Allocate SGEs and initialize the ring elements */
			for (i = 0, ring_prod = 0;
			     i < MAX_RX_SGE_CNT*NUM_RX_SGE_PAGES; i++) {

				if (bnx2x_alloc_rx_sge(bp, fp, ring_prod) < 0) {
					BNX2X_ERR("was only able to allocate "
						  "%d rx sges\n", i);
					BNX2X_ERR("disabling TPA for "
						  "queue[%d]\n", j);
					/* Cleanup already allocated elements */
					bnx2x_free_rx_sge_range(bp, fp,
								ring_prod);
					bnx2x_free_tpa_pool(bp, fp,
							    max_agg_queues);
					fp->disable_tpa = 1;
					ring_prod = 0;
					break;
				}
				ring_prod = NEXT_SGE_IDX(ring_prod);
			}

			fp->rx_sge_prod = ring_prod;
		}
	}

	for_each_rx_queue(bp, j) {
		struct bnx2x_fastpath *fp = &bp->fp[j];

		fp->rx_bd_cons = 0;

		/* Activate BD ring */
		/* Warning!
		 * this will generate an interrupt (to the TSTORM)
		 * must only be done after chip is initialized
		 */
		bnx2x_update_rx_prod(bp, fp, fp->rx_bd_prod, fp->rx_comp_prod,
				     fp->rx_sge_prod);

		if (j != 0)
			continue;

		if (CHIP_IS_E1(bp)) {
			REG_WR(bp, BAR_USTRORM_INTMEM +
			       USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func),
			       U64_LO(fp->rx_comp_mapping));
			REG_WR(bp, BAR_USTRORM_INTMEM +
			       USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func) + 4,
			       U64_HI(fp->rx_comp_mapping));
		}
	}
}

static void bnx2x_free_tx_skbs(struct bnx2x *bp)
{
	int i;

	for_each_tx_queue(bp, i) {
		struct bnx2x_fastpath *fp = &bp->fp[i];

		u16 bd_cons = fp->tx_bd_cons;
		u16 sw_prod = fp->tx_pkt_prod;
		u16 sw_cons = fp->tx_pkt_cons;

		while (sw_cons != sw_prod) {
			bd_cons = bnx2x_free_tx_pkt(bp, fp, TX_BD(sw_cons));
			sw_cons++;
		}
	}
}

static void bnx2x_free_rx_bds(struct bnx2x_fastpath *fp)
{
	struct bnx2x *bp = fp->bp;
	int i;

	/* ring wasn't allocated */
	if (fp->rx_buf_ring == NULL)
		return;

	for (i = 0; i < NUM_RX_BD; i++) {
		struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i];
		struct sk_buff *skb = rx_buf->skb;

		if (skb == NULL)
			continue;
		dma_unmap_single(&bp->pdev->dev,
				 dma_unmap_addr(rx_buf, mapping),
				 fp->rx_buf_size, DMA_FROM_DEVICE);

		rx_buf->skb = NULL;
		dev_kfree_skb(skb);
	}
}

static void bnx2x_free_rx_skbs(struct bnx2x *bp)
{
	int j;

	for_each_rx_queue(bp, j) {
		struct bnx2x_fastpath *fp = &bp->fp[j];

		bnx2x_free_rx_bds(fp);

		if (!fp->disable_tpa)
			bnx2x_free_tpa_pool(bp, fp, CHIP_IS_E1(bp) ?
					    ETH_MAX_AGGREGATION_QUEUES_E1 :
					    ETH_MAX_AGGREGATION_QUEUES_E1H_E2);
	}
}

void bnx2x_free_skbs(struct bnx2x *bp)
{
	bnx2x_free_tx_skbs(bp);
	bnx2x_free_rx_skbs(bp);
}

void bnx2x_update_max_mf_config(struct bnx2x *bp, u32 value)
{
	/* load old values */
	u32 mf_cfg = bp->mf_config[BP_VN(bp)];

	if (value != bnx2x_extract_max_cfg(bp, mf_cfg)) {
		/* leave all but MAX value */
		mf_cfg &= ~FUNC_MF_CFG_MAX_BW_MASK;

		/* set new MAX value */
		mf_cfg |= (value << FUNC_MF_CFG_MAX_BW_SHIFT)
				& FUNC_MF_CFG_MAX_BW_MASK;

		bnx2x_fw_command(bp, DRV_MSG_CODE_SET_MF_BW, mf_cfg);
	}
}

/**
 * bnx2x_free_msix_irqs - free previously requested MSI-X IRQ vectors
 *
 * @bp:		driver handle
 * @nvecs:	number of vectors to be released
 */
static void bnx2x_free_msix_irqs(struct bnx2x *bp, int nvecs)
{
	int i, offset = 0;

	if (nvecs == offset)
		return;
	free_irq(bp->msix_table[offset].vector, bp->dev);
	DP(NETIF_MSG_IFDOWN, "released sp irq (%d)\n",
	   bp->msix_table[offset].vector);
	offset++;
#ifdef BCM_CNIC
	if (nvecs == offset)
		return;
	offset++;
#endif

	for_each_eth_queue(bp, i) {
		if (nvecs == offset)
			return;
		DP(NETIF_MSG_IFDOWN, "about to release fp #%d->%d "
		   "irq\n", i, bp->msix_table[offset].vector);

		free_irq(bp->msix_table[offset++].vector, &bp->fp[i]);
	}
}

void bnx2x_free_irq(struct bnx2x *bp)
{
	if (bp->flags & USING_MSIX_FLAG)
		bnx2x_free_msix_irqs(bp, BNX2X_NUM_ETH_QUEUES(bp) +
				     CNIC_CONTEXT_USE + 1);
	else if (bp->flags & USING_MSI_FLAG)
		free_irq(bp->pdev->irq, bp->dev);
	else
		free_irq(bp->pdev->irq, bp->dev);
}

int bnx2x_enable_msix(struct bnx2x *bp)
{
	int msix_vec = 0, i, rc, req_cnt;

	bp->msix_table[msix_vec].entry = msix_vec;
	DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n",
	   bp->msix_table[0].entry);
	msix_vec++;

#ifdef BCM_CNIC
	bp->msix_table[msix_vec].entry = msix_vec;
	DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d (CNIC)\n",
	   bp->msix_table[msix_vec].entry, bp->msix_table[msix_vec].entry);
	msix_vec++;
#endif
	for_each_eth_queue(bp, i) {
		bp->msix_table[msix_vec].entry = msix_vec;
		DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d "
		   "(fastpath #%u)\n", msix_vec, msix_vec, i);
		msix_vec++;
	}

	req_cnt = BNX2X_NUM_ETH_QUEUES(bp) + CNIC_CONTEXT_USE + 1;

	rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], req_cnt);

	/*
	 * reconfigure number of tx/rx queues according to available
	 * MSI-X vectors
	 */
	if (rc >= BNX2X_MIN_MSIX_VEC_CNT) {
		/* how less vectors we will have? */
		int diff = req_cnt - rc;

		DP(NETIF_MSG_IFUP,
		   "Trying to use less MSI-X vectors: %d\n", rc);

		rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc);

		if (rc) {
			DP(NETIF_MSG_IFUP,
			   "MSI-X is not attainable  rc %d\n", rc);
			return rc;
		}
		/*
		 * decrease number of queues by number of unallocated entries
		 */
		bp->num_queues -= diff;

		DP(NETIF_MSG_IFUP, "New queue configuration set: %d\n",
				  bp->num_queues);
	} else if (rc) {
		/* fall to INTx if not enough memory */
		if (rc == -ENOMEM)
			bp->flags |= DISABLE_MSI_FLAG;
		DP(NETIF_MSG_IFUP, "MSI-X is not attainable  rc %d\n", rc);
		return rc;
	}

	bp->flags |= USING_MSIX_FLAG;

	return 0;
}

static int bnx2x_req_msix_irqs(struct bnx2x *bp)
{
	int i, rc, offset = 0;

	rc = request_irq(bp->msix_table[offset++].vector,
			 bnx2x_msix_sp_int, 0,
			 bp->dev->name, bp->dev);
	if (rc) {
		BNX2X_ERR("request sp irq failed\n");
		return -EBUSY;
	}

#ifdef BCM_CNIC
	offset++;
#endif
	for_each_eth_queue(bp, i) {
		struct bnx2x_fastpath *fp = &bp->fp[i];
		snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
			 bp->dev->name, i);

		rc = request_irq(bp->msix_table[offset].vector,
				 bnx2x_msix_fp_int, 0, fp->name, fp);
		if (rc) {
			BNX2X_ERR("request fp #%d irq (%d) failed  rc %d\n", i,
			      bp->msix_table[offset].vector, rc);
			bnx2x_free_msix_irqs(bp, offset);
			return -EBUSY;
		}

		offset++;
	}

	i = BNX2X_NUM_ETH_QUEUES(bp);
	offset = 1 + CNIC_CONTEXT_USE;
	netdev_info(bp->dev, "using MSI-X  IRQs: sp %d  fp[%d] %d"
	       " ... fp[%d] %d\n",
	       bp->msix_table[0].vector,
	       0, bp->msix_table[offset].vector,
	       i - 1, bp->msix_table[offset + i - 1].vector);

	return 0;
}

int bnx2x_enable_msi(struct bnx2x *bp)
{
	int rc;

	rc = pci_enable_msi(bp->pdev);
	if (rc) {
		DP(NETIF_MSG_IFUP, "MSI is not attainable\n");
		return -1;
	}
	bp->flags |= USING_MSI_FLAG;

	return 0;
}

static int bnx2x_req_irq(struct bnx2x *bp)
{
	unsigned long flags;
	int rc;

	if (bp->flags & USING_MSI_FLAG)
		flags = 0;
	else
		flags = IRQF_SHARED;

	rc = request_irq(bp->pdev->irq, bnx2x_interrupt, flags,
			 bp->dev->name, bp->dev);
	return rc;
}

static inline int bnx2x_setup_irqs(struct bnx2x *bp)
{
	int rc = 0;
	if (bp->flags & USING_MSIX_FLAG) {
		rc = bnx2x_req_msix_irqs(bp);
		if (rc)
			return rc;
	} else {
		bnx2x_ack_int(bp);
		rc = bnx2x_req_irq(bp);
		if (rc) {
			BNX2X_ERR("IRQ request failed  rc %d, aborting\n", rc);
			return rc;
		}
		if (bp->flags & USING_MSI_FLAG) {
			bp->dev->irq = bp->pdev->irq;
			netdev_info(bp->dev, "using MSI  IRQ %d\n",
			       bp->pdev->irq);
		}
	}

	return 0;
}

static inline void bnx2x_napi_enable(struct bnx2x *bp)
{
	int i;

	for_each_rx_queue(bp, i)
		napi_enable(&bnx2x_fp(bp, i, napi));
}

static inline void bnx2x_napi_disable(struct bnx2x *bp)
{
	int i;

	for_each_rx_queue(bp, i)
		napi_disable(&bnx2x_fp(bp, i, napi));
}

void bnx2x_netif_start(struct bnx2x *bp)
{
	if (netif_running(bp->dev)) {
		bnx2x_napi_enable(bp);
		bnx2x_int_enable(bp);
		if (bp->state == BNX2X_STATE_OPEN)
			netif_tx_wake_all_queues(bp->dev);
	}
}

void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
{
	bnx2x_int_disable_sync(bp, disable_hw);
	bnx2x_napi_disable(bp);
}

u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb)
{
#ifdef BCM_CNIC
	struct bnx2x *bp = netdev_priv(dev);
	if (NO_FCOE(bp))
		return skb_tx_hash(dev, skb);
	else {
		struct ethhdr *hdr = (struct ethhdr *)skb->data;
		u16 ether_type = ntohs(hdr->h_proto);

		/* Skip VLAN tag if present */
		if (ether_type == ETH_P_8021Q) {
			struct vlan_ethhdr *vhdr =
				(struct vlan_ethhdr *)skb->data;

			ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
		}

		/* If ethertype is FCoE or FIP - use FCoE ring */
		if ((ether_type == ETH_P_FCOE) || (ether_type == ETH_P_FIP))
			return bnx2x_fcoe(bp, index);
	}
#endif
	/* Select a none-FCoE queue:  if FCoE is enabled, exclude FCoE L2 ring
	 */
	return __skb_tx_hash(dev, skb,
			dev->real_num_tx_queues - FCOE_CONTEXT_USE);
}

void bnx2x_set_num_queues(struct bnx2x *bp)
{
	switch (bp->multi_mode) {
	case ETH_RSS_MODE_DISABLED:
		bp->num_queues = 1;
		break;
	case ETH_RSS_MODE_REGULAR:
		bp->num_queues = bnx2x_calc_num_queues(bp);
		break;

	default:
		bp->num_queues = 1;
		break;
	}

	/* Add special queues */
	bp->num_queues += NONE_ETH_CONTEXT_USE;
}

static inline int bnx2x_set_real_num_queues(struct bnx2x *bp)
{
	int rc, num = bp->num_queues;

#ifdef BCM_CNIC
	if (NO_FCOE(bp))
		num -= FCOE_CONTEXT_USE;

#endif
	netif_set_real_num_tx_queues(bp->dev, num);
	rc = netif_set_real_num_rx_queues(bp->dev, num);
	return rc;
}

static inline void bnx2x_set_rx_buf_size(struct bnx2x *bp)
{
	int i;

	for_each_queue(bp, i) {
		struct bnx2x_fastpath *fp = &bp->fp[i];

		/* Always use a mini-jumbo MTU for the FCoE L2 ring */
		if (IS_FCOE_IDX(i))
			/*
			 * Although there are no IP frames expected to arrive to
			 * this ring we still want to add an
			 * IP_HEADER_ALIGNMENT_PADDING to prevent a buffer
			 * overrun attack.
			 */
			fp->rx_buf_size =
				BNX2X_FCOE_MINI_JUMBO_MTU + ETH_OVREHEAD +
				BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
		else
			fp->rx_buf_size =
				bp->dev->mtu + ETH_OVREHEAD +
				BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
	}
}

static inline int bnx2x_init_rss_pf(struct bnx2x *bp)
{
	int i;
	u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
	u8 num_eth_queues = BNX2X_NUM_ETH_QUEUES(bp);

	/*
	 * Prepare the inital contents fo the indirection table if RSS is
	 * enabled
	 */
	if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
		for (i = 0; i < sizeof(ind_table); i++)
			ind_table[i] =
				bp->fp->cl_id +	(i % num_eth_queues);
	}

	/*
	 * For 57710 and 57711 SEARCHER configuration (rss_keys) is
	 * per-port, so if explicit configuration is needed , do it only
	 * for a PMF.
	 *
	 * For 57712 and newer on the other hand it's a per-function
	 * configuration.
	 */
	return bnx2x_config_rss_pf(bp, ind_table,
				   bp->port.pmf || !CHIP_IS_E1x(bp));
}

int bnx2x_config_rss_pf(struct bnx2x *bp, u8 *ind_table, bool config_hash)
{
	struct bnx2x_config_rss_params params = {0};
	int i;

	/* Although RSS is meaningless when there is a single HW queue we
	 * still need it enabled in order to have HW Rx hash generated.
	 *
	 * if (!is_eth_multi(bp))
	 *      bp->multi_mode = ETH_RSS_MODE_DISABLED;
	 */

	params.rss_obj = &bp->rss_conf_obj;

	__set_bit(RAMROD_COMP_WAIT, &params.ramrod_flags);

	/* RSS mode */
	switch (bp->multi_mode) {
	case ETH_RSS_MODE_DISABLED:
		__set_bit(BNX2X_RSS_MODE_DISABLED, &params.rss_flags);
		break;
	case ETH_RSS_MODE_REGULAR:
		__set_bit(BNX2X_RSS_MODE_REGULAR, &params.rss_flags);
		break;
	case ETH_RSS_MODE_VLAN_PRI:
		__set_bit(BNX2X_RSS_MODE_VLAN_PRI, &params.rss_flags);
		break;
	case ETH_RSS_MODE_E1HOV_PRI:
		__set_bit(BNX2X_RSS_MODE_E1HOV_PRI, &params.rss_flags);
		break;
	case ETH_RSS_MODE_IP_DSCP:
		__set_bit(BNX2X_RSS_MODE_IP_DSCP, &params.rss_flags);
		break;
	default:
		BNX2X_ERR("Unknown multi_mode: %d\n", bp->multi_mode);
		return -EINVAL;
	}

	/* If RSS is enabled */
	if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
		/* RSS configuration */
		__set_bit(BNX2X_RSS_IPV4, &params.rss_flags);
		__set_bit(BNX2X_RSS_IPV4_TCP, &params.rss_flags);
		__set_bit(BNX2X_RSS_IPV6, &params.rss_flags);
		__set_bit(BNX2X_RSS_IPV6_TCP, &params.rss_flags);

		/* Hash bits */
		params.rss_result_mask = MULTI_MASK;

		memcpy(params.ind_table, ind_table, sizeof(params.ind_table));

		if (config_hash) {
			/* RSS keys */
			for (i = 0; i < sizeof(params.rss_key) / 4; i++)
				params.rss_key[i] = random32();

			__set_bit(BNX2X_RSS_SET_SRCH, &params.rss_flags);
		}
	}

	return bnx2x_config_rss(bp, &params);
}

static inline int bnx2x_init_hw(struct bnx2x *bp, u32 load_code)
{
	struct bnx2x_func_state_params func_params = {0};

	/* Prepare parameters for function state transitions */
	__set_bit(RAMROD_COMP_WAIT, &func_params.ramrod_flags);

	func_params.f_obj = &bp->func_obj;
	func_params.cmd = BNX2X_F_CMD_HW_INIT;

	func_params.params.hw_init.load_phase = load_code;

	return bnx2x_func_state_change(bp, &func_params);
}

/*
 * Cleans the object that have internal lists without sending
 * ramrods. Should be run when interrutps are disabled.
 */
static void bnx2x_squeeze_objects(struct bnx2x *bp)
{
	int rc;
	unsigned long ramrod_flags = 0, vlan_mac_flags = 0;
	struct bnx2x_mcast_ramrod_params rparam = {0};
	struct bnx2x_vlan_mac_obj *mac_obj = &bp->fp->mac_obj;

	/***************** Cleanup MACs' object first *************************/

	/* Wait for completion of requested */
	__set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
	/* Perform a dry cleanup */
	__set_bit(RAMROD_DRV_CLR_ONLY, &ramrod_flags);

	/* Clean ETH primary MAC */
	__set_bit(BNX2X_ETH_MAC, &vlan_mac_flags);
	rc = mac_obj->delete_all(bp, &bp->fp->mac_obj, &vlan_mac_flags,
				 &ramrod_flags);
	if (rc != 0)
		BNX2X_ERR("Failed to clean ETH MACs: %d\n", rc);

	/* Cleanup UC list */
	vlan_mac_flags = 0;
	__set_bit(BNX2X_UC_LIST_MAC, &vlan_mac_flags);
	rc = mac_obj->delete_all(bp, mac_obj, &vlan_mac_flags,
				 &ramrod_flags);
	if (rc != 0)
		BNX2X_ERR("Failed to clean UC list MACs: %d\n", rc);

	/***************** Now clean mcast object *****************************/
	rparam.mcast_obj = &bp->mcast_obj;
	__set_bit(RAMROD_DRV_CLR_ONLY, &rparam.ramrod_flags);

	/* Add a DEL command... */
	rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_DEL);
	if (rc < 0)
		BNX2X_ERR("Failed to add a new DEL command to a multi-cast "
			  "object: %d\n", rc);

	/* ...and wait until all pending commands are cleared */
	rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
	while (rc != 0) {
		if (rc < 0) {
			BNX2X_ERR("Failed to clean multi-cast object: %d\n",
				  rc);
			return;
		}

		rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
	}
}

#ifndef BNX2X_STOP_ON_ERROR
#define LOAD_ERROR_EXIT(bp, label) \
	do { \
		(bp)->state = BNX2X_STATE_ERROR; \
		goto label; \
	} while (0)
#else
#define LOAD_ERROR_EXIT(bp, label) \
	do { \
		(bp)->state = BNX2X_STATE_ERROR; \
		(bp)->panic = 1; \
		return -EBUSY; \
	} while (0)
#endif

/* must be called with rtnl_lock */
int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
{
	int port = BP_PORT(bp);
	u32 load_code;
	int i, rc;

#ifdef BNX2X_STOP_ON_ERROR
	if (unlikely(bp->panic))
		return -EPERM;
#endif

	bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD;

	/* Set the initial link reported state to link down */
	bnx2x_acquire_phy_lock(bp);
	memset(&bp->last_reported_link, 0, sizeof(bp->last_reported_link));
	__set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
		&bp->last_reported_link.link_report_flags);
	bnx2x_release_phy_lock(bp);

	/* must be called before memory allocation and HW init */
	bnx2x_ilt_set_info(bp);

	/* zero fastpath structures preserving invariants like napi which are
	 * allocated only once
	 */
	for_each_queue(bp, i)
		bnx2x_bz_fp(bp, i);

	/* Set the receive queues buffer size */
	bnx2x_set_rx_buf_size(bp);

	/*
	 * set the tpa flag for each queue. The tpa flag determines the queue
	 * minimal size so it must be set prior to queue memory allocation
	 */
	for_each_queue(bp, i)
		bnx2x_fp(bp, i, disable_tpa) =
					((bp->flags & TPA_ENABLE_FLAG) == 0);

#ifdef BCM_CNIC
	/* We don't want TPA on FCoE L2 ring */
	bnx2x_fcoe(bp, disable_tpa) = 1;
#endif

	if (bnx2x_alloc_mem(bp))
		return -ENOMEM;

	/* As long as bnx2x_alloc_mem() may possibly update
	 * bp->num_queues, bnx2x_set_real_num_queues() should always
	 * come after it.
	 */
	rc = bnx2x_set_real_num_queues(bp);
	if (rc) {
		BNX2X_ERR("Unable to set real_num_queues\n");
		LOAD_ERROR_EXIT(bp, load_error0);
	}

	bnx2x_napi_enable(bp);

	/* Send LOAD_REQUEST command to MCP
	 * Returns the type of LOAD command:
	 * if it is the first port to be initialized
	 * common blocks should be initialized, otherwise - not
	 */
	if (!BP_NOMCP(bp)) {
		load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ, 0);
		if (!load_code) {
			BNX2X_ERR("MCP response failure, aborting\n");
			rc = -EBUSY;
			LOAD_ERROR_EXIT(bp, load_error1);
		}
		if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) {
			rc = -EBUSY; /* other port in diagnostic mode */
			LOAD_ERROR_EXIT(bp, load_error1);
		}

	} else {
		int path = BP_PATH(bp);

		DP(NETIF_MSG_IFUP, "NO MCP - load counts[%d]      %d, %d, %d\n",
		   path, load_count[path][0], load_count[path][1],
		   load_count[path][2]);
		load_count[path][0]++;
		load_count[path][1 + port]++;
		DP(NETIF_MSG_IFUP, "NO MCP - new load counts[%d]  %d, %d, %d\n",
		   path, load_count[path][0], load_count[path][1],
		   load_count[path][2]);
		if (load_count[path][0] == 1)
			load_code = FW_MSG_CODE_DRV_LOAD_COMMON;
		else if (load_count[path][1 + port] == 1)
			load_code = FW_MSG_CODE_DRV_LOAD_PORT;
		else
			load_code = FW_MSG_CODE_DRV_LOAD_FUNCTION;
	}

	if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
	    (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP) ||
	    (load_code == FW_MSG_CODE_DRV_LOAD_PORT))
		bp->port.pmf = 1;
	else
		bp->port.pmf = 0;
	DP(NETIF_MSG_LINK, "pmf %d\n", bp->port.pmf);

	/* Init Function state controlling object */
	bnx2x__init_func_obj(bp);

	/* Initialize HW */
	rc = bnx2x_init_hw(bp, load_code);
	if (rc) {
		BNX2X_ERR("HW init failed, aborting\n");
		bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
		LOAD_ERROR_EXIT(bp, load_error2);
	}

	/* Connect to IRQs */
	rc = bnx2x_setup_irqs(bp);
	if (rc) {
		bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
		LOAD_ERROR_EXIT(bp, load_error2);
	}

	/* Setup NIC internals and enable interrupts */
	bnx2x_nic_init(bp, load_code);

	/* Init per-function objects */
	bnx2x_init_bp_objs(bp);

	if (((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
	    (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP)) &&
	    (bp->common.shmem2_base)) {
		if (SHMEM2_HAS(bp, dcc_support))
			SHMEM2_WR(bp, dcc_support,
				  (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV |
				   SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV));
	}

	bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
	rc = bnx2x_func_start(bp);
	if (rc) {
		BNX2X_ERR("Function start failed!\n");
		LOAD_ERROR_EXIT(bp, load_error3);
	}

	/* Send LOAD_DONE command to MCP */
	if (!BP_NOMCP(bp)) {
		load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
		if (!load_code) {
			BNX2X_ERR("MCP response failure, aborting\n");
			rc = -EBUSY;
			LOAD_ERROR_EXIT(bp, load_error3);
		}
	}

	rc = bnx2x_setup_leading(bp);
	if (rc) {
		BNX2X_ERR("Setup leading failed!\n");
		LOAD_ERROR_EXIT(bp, load_error3);
	}

#ifdef BCM_CNIC
	/* Enable Timer scan */
	REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 1);
#endif

	for_each_nondefault_queue(bp, i) {
		rc = bnx2x_setup_queue(bp, &bp->fp[i], 0);
		if (rc)
			LOAD_ERROR_EXIT(bp, load_error4);
	}

	rc = bnx2x_init_rss_pf(bp);
	if (rc)
		LOAD_ERROR_EXIT(bp, load_error4);

	/* Now when Clients are configured we are ready to work */
	bp->state = BNX2X_STATE_OPEN;

	/* Configure a ucast MAC */
	rc = bnx2x_set_eth_mac(bp, true);
	if (rc)
		LOAD_ERROR_EXIT(bp, load_error4);

	if (bp->pending_max) {
		bnx2x_update_max_mf_config(bp, bp->pending_max);
		bp->pending_max = 0;
	}

	if (bp->port.pmf)
		bnx2x_initial_phy_init(bp, load_mode);

	/* Start fast path */

	/* Initialize Rx filter. */
	netif_addr_lock_bh(bp->dev);
	bnx2x_set_rx_mode(bp->dev);
	netif_addr_unlock_bh(bp->dev);

	/* Start the Tx */
	switch (load_mode) {
	case LOAD_NORMAL:
		/* Tx queue should be only reenabled */
		netif_tx_wake_all_queues(bp->dev);
		break;

	case LOAD_OPEN:
		netif_tx_start_all_queues(bp->dev);
		smp_mb__after_clear_bit();
		break;

	case LOAD_DIAG:
		bp->state = BNX2X_STATE_DIAG;
		break;

	default:
		break;
	}

	if (!bp->port.pmf)
		bnx2x__link_status_update(bp);

	/* start the timer */
	mod_timer(&bp->timer, jiffies + bp->current_interval);

#ifdef BCM_CNIC
	bnx2x_setup_cnic_irq_info(bp);
	if (bp->state == BNX2X_STATE_OPEN)
		bnx2x_cnic_notify(bp, CNIC_CTL_START_CMD);
#endif
	bnx2x_inc_load_cnt(bp);

	/* Wait for all pending SP commands to complete */
	if (!bnx2x_wait_sp_comp(bp, ~0x0UL)) {
		BNX2X_ERR("Timeout waiting for SP elements to complete\n");
		bnx2x_nic_unload(bp, UNLOAD_CLOSE);
		return -EBUSY;
	}

	bnx2x_dcbx_init(bp);
	return 0;

#ifndef BNX2X_STOP_ON_ERROR
load_error4:
#ifdef BCM_CNIC
	/* Disable Timer scan */
	REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 0);
#endif
load_error3:
	bnx2x_int_disable_sync(bp, 1);

	/* Clean queueable objects */
	bnx2x_squeeze_objects(bp);

	/* Free SKBs, SGEs, TPA pool and driver internals */
	bnx2x_free_skbs(bp);
	for_each_rx_queue(bp, i)
		bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);

	/* Release IRQs */
	bnx2x_free_irq(bp);
load_error2:
	if (!BP_NOMCP(bp)) {
		bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0);
		bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0);
	}

	bp->port.pmf = 0;
load_error1:
	bnx2x_napi_disable(bp);
load_error0:
	bnx2x_free_mem(bp);

	return rc;
#endif /* ! BNX2X_STOP_ON_ERROR */
}

/* must be called with rtnl_lock */
int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode)
{
	int i;

	if (bp->state == BNX2X_STATE_CLOSED) {
		/* Interface has been removed - nothing to recover */
		bp->recovery_state = BNX2X_RECOVERY_DONE;
		bp->is_leader = 0;
		bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_RESERVED_08);
		smp_wmb();

		return -EINVAL;
	}

#ifdef BCM_CNIC
	bnx2x_cnic_notify(bp, CNIC_CTL_STOP_CMD);
#endif
	bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT;
	smp_mb();

	bp->rx_mode = BNX2X_RX_MODE_NONE;

	/* Stop Tx */
	bnx2x_tx_disable(bp);

	del_timer_sync(&bp->timer);

	/* Set ALWAYS_ALIVE bit in shmem */
	bp->fw_drv_pulse_wr_seq |= DRV_PULSE_ALWAYS_ALIVE;

	bnx2x_drv_pulse(bp);

	bnx2x_stats_handle(bp, STATS_EVENT_STOP);

	/* Cleanup the chip if needed */
	if (unload_mode != UNLOAD_RECOVERY)
		bnx2x_chip_cleanup(bp, unload_mode);
	else {
		/* Disable HW interrupts, NAPI and Tx */
		bnx2x_netif_stop(bp, 1);

		/* Release IRQs */
		bnx2x_free_irq(bp);
	}

	/*
	 * At this stage no more interrupts will arrive so we may safly clean
	 * the queueable objects here in case they failed to get cleaned so far.
	 */
	bnx2x_squeeze_objects(bp);

	bp->port.pmf = 0;

	/* Free SKBs, SGEs, TPA pool and driver internals */
	bnx2x_free_skbs(bp);
	for_each_rx_queue(bp, i)
		bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);

	bnx2x_free_mem(bp);

	bp->state = BNX2X_STATE_CLOSED;

	/* The last driver must disable a "close the gate" if there is no
	 * parity attention or "process kill" pending.
	 */
	if ((!bnx2x_dec_load_cnt(bp)) && (!bnx2x_chk_parity_attn(bp)) &&
	    bnx2x_reset_is_done(bp))
		bnx2x_disable_close_the_gate(bp);

	/* Reset MCP mail box sequence if there is on going recovery */
	if (unload_mode == UNLOAD_RECOVERY)
		bp->fw_seq = 0;

	return 0;
}

int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state)
{
	u16 pmcsr;

	/* If there is no power capability, silently succeed */
	if (!bp->pm_cap) {
		DP(NETIF_MSG_HW, "No power capability. Breaking.\n");
		return 0;
	}

	pci_read_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, &pmcsr);

	switch (state) {
	case PCI_D0:
		pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
				      ((pmcsr & ~PCI_PM_CTRL_STATE_MASK) |
				       PCI_PM_CTRL_PME_STATUS));

		if (pmcsr & PCI_PM_CTRL_STATE_MASK)
			/* delay required during transition out of D3hot */
			msleep(20);
		break;

	case PCI_D3hot:
		/* If there are other clients above don't
		   shut down the power */
		if (atomic_read(&bp->pdev->enable_cnt) != 1)
			return 0;
		/* Don't shut down the power for emulation and FPGA */
		if (CHIP_REV_IS_SLOW(bp))
			return 0;

		pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
		pmcsr |= 3;

		if (bp->wol)
			pmcsr |= PCI_PM_CTRL_PME_ENABLE;

		pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
				      pmcsr);

		/* No more memory access after this point until
		* device is brought back to D0.
		*/
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

/*
 * net_device service functions
 */
int bnx2x_poll(struct napi_struct *napi, int budget)
{
	int work_done = 0;
	struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath,
						 napi);
	struct bnx2x *bp = fp->bp;

	while (1) {
#ifdef BNX2X_STOP_ON_ERROR
		if (unlikely(bp->panic)) {
			napi_complete(napi);
			return 0;
		}
#endif

		if (bnx2x_has_tx_work(fp))
			bnx2x_tx_int(fp);

		if (bnx2x_has_rx_work(fp)) {
			work_done += bnx2x_rx_int(fp, budget - work_done);

			/* must not complete if we consumed full budget */
			if (work_done >= budget)
				break;
		}

		/* Fall out from the NAPI loop if needed */
		if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
#ifdef BCM_CNIC
			/* No need to update SB for FCoE L2 ring as long as
			 * it's connected to the default SB and the SB
			 * has been updated when NAPI was scheduled.
			 */
			if (IS_FCOE_FP(fp)) {
				napi_complete(napi);
				break;
			}
#endif

			bnx2x_update_fpsb_idx(fp);
			/* bnx2x_has_rx_work() reads the status block,
			 * thus we need to ensure that status block indices
			 * have been actually read (bnx2x_update_fpsb_idx)
			 * prior to this check (bnx2x_has_rx_work) so that
			 * we won't write the "newer" value of the status block
			 * to IGU (if there was a DMA right after
			 * bnx2x_has_rx_work and if there is no rmb, the memory
			 * reading (bnx2x_update_fpsb_idx) may be postponed
			 * to right before bnx2x_ack_sb). In this case there
			 * will never be another interrupt until there is
			 * another update of the status block, while there
			 * is still unhandled work.
			 */
			rmb();

			if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
				napi_complete(napi);
				/* Re-enable interrupts */
				DP(NETIF_MSG_HW,
				   "Update index to %d\n", fp->fp_hc_idx);
				bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID,
					     le16_to_cpu(fp->fp_hc_idx),
					     IGU_INT_ENABLE, 1);
				break;
			}
		}
	}

	return work_done;
}

/* we split the first BD into headers and data BDs
 * to ease the pain of our fellow microcode engineers
 * we use one mapping for both BDs
 * So far this has only been observed to happen
 * in Other Operating Systems(TM)
 */
static noinline u16 bnx2x_tx_split(struct bnx2x *bp,
				   struct bnx2x_fastpath *fp,
				   struct sw_tx_bd *tx_buf,
				   struct eth_tx_start_bd **tx_bd, u16 hlen,
				   u16 bd_prod, int nbd)
{
	struct eth_tx_start_bd *h_tx_bd = *tx_bd;
	struct eth_tx_bd *d_tx_bd;
	dma_addr_t mapping;
	int old_len = le16_to_cpu(h_tx_bd->nbytes);

	/* first fix first BD */
	h_tx_bd->nbd = cpu_to_le16(nbd);
	h_tx_bd->nbytes = cpu_to_le16(hlen);

	DP(NETIF_MSG_TX_QUEUED,	"TSO split header size is %d "
	   "(%x:%x) nbd %d\n", h_tx_bd->nbytes, h_tx_bd->addr_hi,
	   h_tx_bd->addr_lo, h_tx_bd->nbd);

	/* now get a new data BD
	 * (after the pbd) and fill it */
	bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
	d_tx_bd = &fp->tx_desc_ring[bd_prod].reg_bd;

	mapping = HILO_U64(le32_to_cpu(h_tx_bd->addr_hi),
			   le32_to_cpu(h_tx_bd->addr_lo)) + hlen;

	d_tx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
	d_tx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
	d_tx_bd->nbytes = cpu_to_le16(old_len - hlen);

	/* this marks the BD as one that has no individual mapping */
	tx_buf->flags |= BNX2X_TSO_SPLIT_BD;

	DP(NETIF_MSG_TX_QUEUED,
	   "TSO split data size is %d (%x:%x)\n",
	   d_tx_bd->nbytes, d_tx_bd->addr_hi, d_tx_bd->addr_lo);

	/* update tx_bd */
	*tx_bd = (struct eth_tx_start_bd *)d_tx_bd;

	return bd_prod;
}

static inline u16 bnx2x_csum_fix(unsigned char *t_header, u16 csum, s8 fix)
{
	if (fix > 0)
		csum = (u16) ~csum_fold(csum_sub(csum,
				csum_partial(t_header - fix, fix, 0)));

	else if (fix < 0)
		csum = (u16) ~csum_fold(csum_add(csum,
				csum_partial(t_header, -fix, 0)));

	return swab16(csum);
}

static inline u32 bnx2x_xmit_type(struct bnx2x *bp, struct sk_buff *skb)
{
	u32 rc;

	if (skb->ip_summed != CHECKSUM_PARTIAL)
		rc = XMIT_PLAIN;

	else {
		if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) {
			rc = XMIT_CSUM_V6;
			if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
				rc |= XMIT_CSUM_TCP;

		} else {
			rc = XMIT_CSUM_V4;
			if (ip_hdr(skb)->protocol == IPPROTO_TCP)
				rc |= XMIT_CSUM_TCP;
		}
	}

	if (skb_is_gso_v6(skb))
		rc |= XMIT_GSO_V6 | XMIT_CSUM_TCP | XMIT_CSUM_V6;
	else if (skb_is_gso(skb))
		rc |= XMIT_GSO_V4 | XMIT_CSUM_V4 | XMIT_CSUM_TCP;

	return rc;
}

#if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
/* check if packet requires linearization (packet is too fragmented)
   no need to check fragmentation if page size > 8K (there will be no
   violation to FW restrictions) */
static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb,
			     u32 xmit_type)
{
	int to_copy = 0;
	int hlen = 0;
	int first_bd_sz = 0;

	/* 3 = 1 (for linear data BD) + 2 (for PBD and last BD) */
	if (skb_shinfo(skb)->nr_frags >= (MAX_FETCH_BD - 3)) {

		if (xmit_type & XMIT_GSO) {
			unsigned short lso_mss = skb_shinfo(skb)->gso_size;
			/* Check if LSO packet needs to be copied:
			   3 = 1 (for headers BD) + 2 (for PBD and last BD) */
			int wnd_size = MAX_FETCH_BD - 3;
			/* Number of windows to check */
			int num_wnds = skb_shinfo(skb)->nr_frags - wnd_size;
			int wnd_idx = 0;
			int frag_idx = 0;
			u32 wnd_sum = 0;

			/* Headers length */
			hlen = (int)(skb_transport_header(skb) - skb->data) +
				tcp_hdrlen(skb);

			/* Amount of data (w/o headers) on linear part of SKB*/
			first_bd_sz = skb_headlen(skb) - hlen;

			wnd_sum  = first_bd_sz;

			/* Calculate the first sum - it's special */
			for (frag_idx = 0; frag_idx < wnd_size - 1; frag_idx++)
				wnd_sum +=
					skb_shinfo(skb)->frags[frag_idx].size;

			/* If there was data on linear skb data - check it */
			if (first_bd_sz > 0) {
				if (unlikely(wnd_sum < lso_mss)) {
					to_copy = 1;
					goto exit_lbl;
				}

				wnd_sum -= first_bd_sz;
			}

			/* Others are easier: run through the frag list and
			   check all windows */
			for (wnd_idx = 0; wnd_idx <= num_wnds; wnd_idx++) {
				wnd_sum +=
			  skb_shinfo(skb)->frags[wnd_idx + wnd_size - 1].size;

				if (unlikely(wnd_sum < lso_mss)) {
					to_copy = 1;
					break;
				}
				wnd_sum -=
					skb_shinfo(skb)->frags[wnd_idx].size;
			}
		} else {
			/* in non-LSO too fragmented packet should always
			   be linearized */
			to_copy = 1;
		}
	}

exit_lbl:
	if (unlikely(to_copy))
		DP(NETIF_MSG_TX_QUEUED,
		   "Linearization IS REQUIRED for %s packet. "
		   "num_frags %d  hlen %d  first_bd_sz %d\n",
		   (xmit_type & XMIT_GSO) ? "LSO" : "non-LSO",
		   skb_shinfo(skb)->nr_frags, hlen, first_bd_sz);

	return to_copy;
}
#endif

static inline void bnx2x_set_pbd_gso_e2(struct sk_buff *skb, u32 *parsing_data,
					u32 xmit_type)
{
	*parsing_data |= (skb_shinfo(skb)->gso_size <<
			      ETH_TX_PARSE_BD_E2_LSO_MSS_SHIFT) &
			      ETH_TX_PARSE_BD_E2_LSO_MSS;
	if ((xmit_type & XMIT_GSO_V6) &&
	    (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
		*parsing_data |= ETH_TX_PARSE_BD_E2_IPV6_WITH_EXT_HDR;
}

/**
 * bnx2x_set_pbd_gso - update PBD in GSO case.
 *
 * @skb:	packet skb
 * @pbd:	parse BD
 * @xmit_type:	xmit flags
 */
static inline void bnx2x_set_pbd_gso(struct sk_buff *skb,
				     struct eth_tx_parse_bd_e1x *pbd,
				     u32 xmit_type)
{
	pbd->lso_mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
	pbd->tcp_send_seq = swab32(tcp_hdr(skb)->seq);
	pbd->tcp_flags = pbd_tcp_flags(skb);

	if (xmit_type & XMIT_GSO_V4) {
		pbd->ip_id = swab16(ip_hdr(skb)->id);
		pbd->tcp_pseudo_csum =
			swab16(~csum_tcpudp_magic(ip_hdr(skb)->saddr,
						  ip_hdr(skb)->daddr,
						  0, IPPROTO_TCP, 0));

	} else
		pbd->tcp_pseudo_csum =
			swab16(~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
						&ipv6_hdr(skb)->daddr,
						0, IPPROTO_TCP, 0));

	pbd->global_data |= ETH_TX_PARSE_BD_E1X_PSEUDO_CS_WITHOUT_LEN;
}

/**
 * bnx2x_set_pbd_csum_e2 - update PBD with checksum and return header length
 *
 * @bp:			driver handle
 * @skb:		packet skb
 * @parsing_data:	data to be updated
 * @xmit_type:		xmit flags
 *
 * 57712 related
 */
static inline  u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,
	u32 *parsing_data, u32 xmit_type)
{
	*parsing_data |=
			((((u8 *)skb_transport_header(skb) - skb->data) >> 1) <<
			ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W_SHIFT) &
			ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W;

	if (xmit_type & XMIT_CSUM_TCP) {
		*parsing_data |= ((tcp_hdrlen(skb) / 4) <<
			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;

		return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;
	} else
		/* We support checksum offload for TCP and UDP only.
		 * No need to pass the UDP header length - it's a constant.
		 */
		return skb_transport_header(skb) +
				sizeof(struct udphdr) - skb->data;
}

static inline void bnx2x_set_sbd_csum(struct bnx2x *bp, struct sk_buff *skb,
	struct eth_tx_start_bd *tx_start_bd, u32 xmit_type)
{
	tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_L4_CSUM;

	if (xmit_type & XMIT_CSUM_V4)
		tx_start_bd->bd_flags.as_bitfield |=
					ETH_TX_BD_FLAGS_IP_CSUM;
	else
		tx_start_bd->bd_flags.as_bitfield |=
					ETH_TX_BD_FLAGS_IPV6;

	if (!(xmit_type & XMIT_CSUM_TCP))
		tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_IS_UDP;
}

/**
 * bnx2x_set_pbd_csum - update PBD with checksum and return header length
 *
 * @bp:		driver handle
 * @skb:	packet skb
 * @pbd:	parse BD to be updated
 * @xmit_type:	xmit flags
 */
static inline u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb,
	struct eth_tx_parse_bd_e1x *pbd,
	u32 xmit_type)
{
	u8 hlen = (skb_network_header(skb) - skb->data) >> 1;

	/* for now NS flag is not used in Linux */
	pbd->global_data =
		(hlen | ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) <<
			 ETH_TX_PARSE_BD_E1X_LLC_SNAP_EN_SHIFT));

	pbd->ip_hlen_w = (skb_transport_header(skb) -
			skb_network_header(skb)) >> 1;

	hlen += pbd->ip_hlen_w;

	/* We support checksum offload for TCP and UDP only */
	if (xmit_type & XMIT_CSUM_TCP)
		hlen += tcp_hdrlen(skb) / 2;
	else
		hlen += sizeof(struct udphdr) / 2;

	pbd->total_hlen_w = cpu_to_le16(hlen);
	hlen = hlen*2;

	if (xmit_type & XMIT_CSUM_TCP) {
		pbd->tcp_pseudo_csum = swab16(tcp_hdr(skb)->check);

	} else {
		s8 fix = SKB_CS_OFF(skb); /* signed! */

		DP(NETIF_MSG_TX_QUEUED,
		   "hlen %d  fix %d  csum before fix %x\n",
		   le16_to_cpu(pbd->total_hlen_w), fix, SKB_CS(skb));

		/* HW bug: fixup the CSUM */
		pbd->tcp_pseudo_csum =
			bnx2x_csum_fix(skb_transport_header(skb),
				       SKB_CS(skb), fix);

		DP(NETIF_MSG_TX_QUEUED, "csum after fix %x\n",
		   pbd->tcp_pseudo_csum);
	}

	return hlen;
}

/* called with netif_tx_lock
 * bnx2x_tx_int() runs without netif_tx_lock unless it needs to call
 * netif_wake_queue()
 */
netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct bnx2x *bp = netdev_priv(dev);
	struct bnx2x_fastpath *fp;
	struct netdev_queue *txq;
	struct sw_tx_bd *tx_buf;
	struct eth_tx_start_bd *tx_start_bd, *first_bd;
	struct eth_tx_bd *tx_data_bd, *total_pkt_bd = NULL;
	struct eth_tx_parse_bd_e1x *pbd_e1x = NULL;
	struct eth_tx_parse_bd_e2 *pbd_e2 = NULL;
	u32 pbd_e2_parsing_data = 0;
	u16 pkt_prod, bd_prod;
	int nbd, fp_index;
	dma_addr_t mapping;
	u32 xmit_type = bnx2x_xmit_type(bp, skb);
	int i;
	u8 hlen = 0;
	__le16 pkt_size = 0;
	struct ethhdr *eth;
	u8 mac_type = UNICAST_ADDRESS;

#ifdef BNX2X_STOP_ON_ERROR
	if (unlikely(bp->panic))
		return NETDEV_TX_BUSY;
#endif

	fp_index = skb_get_queue_mapping(skb);
	txq = netdev_get_tx_queue(dev, fp_index);

	fp = &bp->fp[fp_index];

	if (unlikely(bnx2x_tx_avail(fp) < (skb_shinfo(skb)->nr_frags + 3))) {
		fp->eth_q_stats.driver_xoff++;
		netif_tx_stop_queue(txq);
		BNX2X_ERR("BUG! Tx ring full when queue awake!\n");
		return NETDEV_TX_BUSY;
	}

	DP(NETIF_MSG_TX_QUEUED, "queue[%d]: SKB: summed %x  protocol %x  "
				"protocol(%x,%x) gso type %x  xmit_type %x\n",
	   fp_index, skb->ip_summed, skb->protocol, ipv6_hdr(skb)->nexthdr,
	   ip_hdr(skb)->protocol, skb_shinfo(skb)->gso_type, xmit_type);

	eth = (struct ethhdr *)skb->data;

	/* set flag according to packet type (UNICAST_ADDRESS is default)*/
	if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
		if (is_broadcast_ether_addr(eth->h_dest))
			mac_type = BROADCAST_ADDRESS;
		else
			mac_type = MULTICAST_ADDRESS;
	}

#if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
	/* First, check if we need to linearize the skb (due to FW
	   restrictions). No need to check fragmentation if page size > 8K
	   (there will be no violation to FW restrictions) */
	if (bnx2x_pkt_req_lin(bp, skb, xmit_type)) {
		/* Statistics of linearization */
		bp->lin_cnt++;
		if (skb_linearize(skb) != 0) {
			DP(NETIF_MSG_TX_QUEUED, "SKB linearization failed - "
			   "silently dropping this SKB\n");
			dev_kfree_skb_any(skb);
			return NETDEV_TX_OK;
		}
	}
#endif
	/* Map skb linear data for DMA */
	mapping = dma_map_single(&bp->pdev->dev, skb->data,
				 skb_headlen(skb), DMA_TO_DEVICE);
	if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
		DP(NETIF_MSG_TX_QUEUED, "SKB mapping failed - "
		   "silently dropping this SKB\n");
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}
	/*
	Please read carefully. First we use one BD which we mark as start,
	then we have a parsing info BD (used for TSO or xsum),
	and only then we have the rest of the TSO BDs.
	(don't forget to mark the last one as last,
	and to unmap only AFTER you write to the BD ...)
	And above all, all pdb sizes are in words - NOT DWORDS!
	*/

	/* get current pkt produced now - advance it just before sending packet
	 * since mapping of pages may fail and cause packet to be dropped
	 */
	pkt_prod = fp->tx_pkt_prod;
	bd_prod = TX_BD(fp->tx_bd_prod);

	/* get a tx_buf and first BD
	 * tx_start_bd may be changed during SPLIT,
	 * but first_bd will always stay first
	 */
	tx_buf = &fp->tx_buf_ring[TX_BD(pkt_prod)];
	tx_start_bd = &fp->tx_desc_ring[bd_prod].start_bd;
	first_bd = tx_start_bd;

	tx_start_bd->bd_flags.as_bitfield = ETH_TX_BD_FLAGS_START_BD;
	SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_ETH_ADDR_TYPE,
		 mac_type);

	/* header nbd */
	SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_HDR_NBDS, 1);

	/* remember the first BD of the packet */
	tx_buf->first_bd = fp->tx_bd_prod;
	tx_buf->skb = skb;
	tx_buf->flags = 0;

	DP(NETIF_MSG_TX_QUEUED,
	   "sending pkt %u @%p  next_idx %u  bd %u @%p\n",
	   pkt_prod, tx_buf, fp->tx_pkt_prod, bd_prod, tx_start_bd);

	if (vlan_tx_tag_present(skb)) {
		tx_start_bd->vlan_or_ethertype =
		    cpu_to_le16(vlan_tx_tag_get(skb));
		tx_start_bd->bd_flags.as_bitfield |=
		    (X_ETH_OUTBAND_VLAN << ETH_TX_BD_FLAGS_VLAN_MODE_SHIFT);
	} else
		tx_start_bd->vlan_or_ethertype = cpu_to_le16(pkt_prod);

	/* turn on parsing and get a BD */
	bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));

	if (xmit_type & XMIT_CSUM)
		bnx2x_set_sbd_csum(bp, skb, tx_start_bd, xmit_type);

	if (!CHIP_IS_E1x(bp)) {
		pbd_e2 = &fp->tx_desc_ring[bd_prod].parse_bd_e2;
		memset(pbd_e2, 0, sizeof(struct eth_tx_parse_bd_e2));
		/* Set PBD in checksum offload case */
		if (xmit_type & XMIT_CSUM)
			hlen = bnx2x_set_pbd_csum_e2(bp, skb,
						     &pbd_e2_parsing_data,
						     xmit_type);
		if (IS_MF_SI(bp)) {
			/*
			 * fill in the MAC addresses in the PBD - for local
			 * switching
			 */
			bnx2x_set_fw_mac_addr(&pbd_e2->src_mac_addr_hi,
					      &pbd_e2->src_mac_addr_mid,
					      &pbd_e2->src_mac_addr_lo,
					      eth->h_source);
			bnx2x_set_fw_mac_addr(&pbd_e2->dst_mac_addr_hi,
					      &pbd_e2->dst_mac_addr_mid,
					      &pbd_e2->dst_mac_addr_lo,
					      eth->h_dest);
		}
	} else {
		pbd_e1x = &fp->tx_desc_ring[bd_prod].parse_bd_e1x;
		memset(pbd_e1x, 0, sizeof(struct eth_tx_parse_bd_e1x));
		/* Set PBD in checksum offload case */
		if (xmit_type & XMIT_CSUM)
			hlen = bnx2x_set_pbd_csum(bp, skb, pbd_e1x, xmit_type);

	}

	/* Setup the data pointer of the first BD of the packet */
	tx_start_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
	tx_start_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
	nbd = 2; /* start_bd + pbd + frags (updated when pages are mapped) */
	tx_start_bd->nbytes = cpu_to_le16(skb_headlen(skb));
	pkt_size = tx_start_bd->nbytes;

	DP(NETIF_MSG_TX_QUEUED, "first bd @%p  addr (%x:%x)  nbd %d"
	   "  nbytes %d  flags %x  vlan %x\n",
	   tx_start_bd, tx_start_bd->addr_hi, tx_start_bd->addr_lo,
	   le16_to_cpu(tx_start_bd->nbd), le16_to_cpu(tx_start_bd->nbytes),
	   tx_start_bd->bd_flags.as_bitfield,
	   le16_to_cpu(tx_start_bd->vlan_or_ethertype));

	if (xmit_type & XMIT_GSO) {

		DP(NETIF_MSG_TX_QUEUED,
		   "TSO packet len %d  hlen %d  total len %d  tso size %d\n",
		   skb->len, hlen, skb_headlen(skb),
		   skb_shinfo(skb)->gso_size);

		tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_SW_LSO;

		if (unlikely(skb_headlen(skb) > hlen))
			bd_prod = bnx2x_tx_split(bp, fp, tx_buf, &tx_start_bd,
						 hlen, bd_prod, ++nbd);
		if (!CHIP_IS_E1x(bp))
			bnx2x_set_pbd_gso_e2(skb, &pbd_e2_parsing_data,
					     xmit_type);
		else
			bnx2x_set_pbd_gso(skb, pbd_e1x, xmit_type);
	}

	/* Set the PBD's parsing_data field if not zero
	 * (for the chips newer than 57711).
	 */
	if (pbd_e2_parsing_data)
		pbd_e2->parsing_data = cpu_to_le32(pbd_e2_parsing_data);

	tx_data_bd = (struct eth_tx_bd *)tx_start_bd;

	/* Handle fragmented skb */
	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];

		mapping = dma_map_page(&bp->pdev->dev, frag->page,
				       frag->page_offset, frag->size,
				       DMA_TO_DEVICE);
		if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {

			DP(NETIF_MSG_TX_QUEUED, "Unable to map page - "
						"dropping packet...\n");

			/* we need unmap all buffers already mapped
			 * for this SKB;
			 * first_bd->nbd need to be properly updated
			 * before call to bnx2x_free_tx_pkt
			 */
			first_bd->nbd = cpu_to_le16(nbd);
			bnx2x_free_tx_pkt(bp, fp, TX_BD(fp->tx_pkt_prod));
			return NETDEV_TX_OK;
		}

		bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
		tx_data_bd = &fp->tx_desc_ring[bd_prod].reg_bd;
		if (total_pkt_bd == NULL)
			total_pkt_bd = &fp->tx_desc_ring[bd_prod].reg_bd;

		tx_data_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
		tx_data_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
		tx_data_bd->nbytes = cpu_to_le16(frag->size);
		le16_add_cpu(&pkt_size, frag->size);
		nbd++;

		DP(NETIF_MSG_TX_QUEUED,
		   "frag %d  bd @%p  addr (%x:%x)  nbytes %d\n",
		   i, tx_data_bd, tx_data_bd->addr_hi, tx_data_bd->addr_lo,
		   le16_to_cpu(tx_data_bd->nbytes));
	}

	DP(NETIF_MSG_TX_QUEUED, "last bd @%p\n", tx_data_bd);

	/* update with actual num BDs */
	first_bd->nbd = cpu_to_le16(nbd);

	bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));

	/* now send a tx doorbell, counting the next BD
	 * if the packet contains or ends with it
	 */
	if (TX_BD_POFF(bd_prod) < nbd)
		nbd++;

	/* total_pkt_bytes should be set on the first data BD if
	 * it's not an LSO packet and there is more than one
	 * data BD. In this case pkt_size is limited by an MTU value.
	 * However we prefer to set it for an LSO packet (while we don't
	 * have to) in order to save some CPU cycles in a none-LSO
	 * case, when we much more care about them.
	 */
	if (total_pkt_bd != NULL)
		total_pkt_bd->total_pkt_bytes = pkt_size;

	if (pbd_e1x)
		DP(NETIF_MSG_TX_QUEUED,
		   "PBD (E1X) @%p  ip_data %x  ip_hlen %u  ip_id %u  lso_mss %u"
		   "  tcp_flags %x  xsum %x  seq %u  hlen %u\n",
		   pbd_e1x, pbd_e1x->global_data, pbd_e1x->ip_hlen_w,
		   pbd_e1x->ip_id, pbd_e1x->lso_mss, pbd_e1x->tcp_flags,
		   pbd_e1x->tcp_pseudo_csum, pbd_e1x->tcp_send_seq,
		    le16_to_cpu(pbd_e1x->total_hlen_w));
	if (pbd_e2)
		DP(NETIF_MSG_TX_QUEUED,
		   "PBD (E2) @%p  dst %x %x %x src %x %x %x parsing_data %x\n",
		   pbd_e2, pbd_e2->dst_mac_addr_hi, pbd_e2->dst_mac_addr_mid,
		   pbd_e2->dst_mac_addr_lo, pbd_e2->src_mac_addr_hi,
		   pbd_e2->src_mac_addr_mid, pbd_e2->src_mac_addr_lo,
		   pbd_e2->parsing_data);
	DP(NETIF_MSG_TX_QUEUED, "doorbell: nbd %d  bd %u\n", nbd, bd_prod);

	fp->tx_pkt_prod++;
	/*
	 * Make sure that the BD data is updated before updating the producer
	 * since FW might read the BD right after the producer is updated.
	 * This is only applicable for weak-ordered memory model archs such
	 * as IA-64. The following barrier is also mandatory since FW will
	 * assumes packets must have BDs.
	 */
	wmb();

	fp->tx_db.data.prod += nbd;
	barrier();

	DOORBELL(bp, fp->cid, fp->tx_db.raw);

	mmiowb();

	fp->tx_bd_prod += nbd;

	if (unlikely(bnx2x_tx_avail(fp) < MAX_SKB_FRAGS + 3)) {
		netif_tx_stop_queue(txq);

		/* paired memory barrier is in bnx2x_tx_int(), we have to keep
		 * ordering of set_bit() in netif_tx_stop_queue() and read of
		 * fp->bd_tx_cons */
		smp_mb();

		fp->eth_q_stats.driver_xoff++;
		if (bnx2x_tx_avail(fp) >= MAX_SKB_FRAGS + 3)
			netif_tx_wake_queue(txq);
	}
	fp->tx_pkt++;

	return NETDEV_TX_OK;
}

/* called with rtnl_lock */
int bnx2x_change_mac_addr(struct net_device *dev, void *p)
{
	struct sockaddr *addr = p;
	struct bnx2x *bp = netdev_priv(dev);
	int rc = 0;

	if (!is_valid_ether_addr((u8 *)(addr->sa_data)))
		return -EINVAL;

	if (netif_running(dev))  {
		rc = bnx2x_set_eth_mac(bp, false);
		if (rc)
			return rc;
	}

	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);

	if (netif_running(dev))
		rc = bnx2x_set_eth_mac(bp, true);

	return rc;
}

static void bnx2x_free_fp_mem_at(struct bnx2x *bp, int fp_index)
{
	union host_hc_status_block *sb = &bnx2x_fp(bp, fp_index, status_blk);
	struct bnx2x_fastpath *fp = &bp->fp[fp_index];

	/* Common */
#ifdef BCM_CNIC
	if (IS_FCOE_IDX(fp_index)) {
		memset(sb, 0, sizeof(union host_hc_status_block));
		fp->status_blk_mapping = 0;

	} else {
#endif
		/* status blocks */
		if (!CHIP_IS_E1x(bp))
			BNX2X_PCI_FREE(sb->e2_sb,
				       bnx2x_fp(bp, fp_index,
						status_blk_mapping),
				       sizeof(struct host_hc_status_block_e2));
		else
			BNX2X_PCI_FREE(sb->e1x_sb,
				       bnx2x_fp(bp, fp_index,
						status_blk_mapping),
				       sizeof(struct host_hc_status_block_e1x));
#ifdef BCM_CNIC
	}
#endif
	/* Rx */
	if (!skip_rx_queue(bp, fp_index)) {
		bnx2x_free_rx_bds(fp);

		/* fastpath rx rings: rx_buf rx_desc rx_comp */
		BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_buf_ring));
		BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_desc_ring),
			       bnx2x_fp(bp, fp_index, rx_desc_mapping),
			       sizeof(struct eth_rx_bd) * NUM_RX_BD);

		BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_comp_ring),
			       bnx2x_fp(bp, fp_index, rx_comp_mapping),
			       sizeof(struct eth_fast_path_rx_cqe) *
			       NUM_RCQ_BD);

		/* SGE ring */
		BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_page_ring));
		BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_sge_ring),
			       bnx2x_fp(bp, fp_index, rx_sge_mapping),
			       BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
	}

	/* Tx */
	if (!skip_tx_queue(bp, fp_index)) {
		/* fastpath tx rings: tx_buf tx_desc */
		BNX2X_FREE(bnx2x_fp(bp, fp_index, tx_buf_ring));
		BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, tx_desc_ring),
			       bnx2x_fp(bp, fp_index, tx_desc_mapping),
			       sizeof(union eth_tx_bd_types) * NUM_TX_BD);
	}
	/* end of fastpath */
}

void bnx2x_free_fp_mem(struct bnx2x *bp)
{
	int i;
	for_each_queue(bp, i)
		bnx2x_free_fp_mem_at(bp, i);
}

static inline void set_sb_shortcuts(struct bnx2x *bp, int index)
{
	union host_hc_status_block status_blk = bnx2x_fp(bp, index, status_blk);
	if (!CHIP_IS_E1x(bp)) {
		bnx2x_fp(bp, index, sb_index_values) =
			(__le16 *)status_blk.e2_sb->sb.index_values;
		bnx2x_fp(bp, index, sb_running_index) =
			(__le16 *)status_blk.e2_sb->sb.running_index;
	} else {
		bnx2x_fp(bp, index, sb_index_values) =
			(__le16 *)status_blk.e1x_sb->sb.index_values;
		bnx2x_fp(bp, index, sb_running_index) =
			(__le16 *)status_blk.e1x_sb->sb.running_index;
	}
}

static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
{
	union host_hc_status_block *sb;
	struct bnx2x_fastpath *fp = &bp->fp[index];
	int ring_size = 0;

	/* if rx_ring_size specified - use it */
	int rx_ring_size = bp->rx_ring_size ? bp->rx_ring_size :
			   MAX_RX_AVAIL/bp->num_queues;

	/* allocate at least number of buffers required by FW */
	rx_ring_size = max_t(int, fp->disable_tpa ? MIN_RX_SIZE_NONTPA :
						    MIN_RX_SIZE_TPA,
				  rx_ring_size);

	bnx2x_fp(bp, index, bp) = bp;
	bnx2x_fp(bp, index, index) = index;

	/* Common */
	sb = &bnx2x_fp(bp, index, status_blk);
#ifdef BCM_CNIC
	if (!IS_FCOE_IDX(index)) {
#endif
		/* status blocks */
		if (!CHIP_IS_E1x(bp))
			BNX2X_PCI_ALLOC(sb->e2_sb,
				&bnx2x_fp(bp, index, status_blk_mapping),
				sizeof(struct host_hc_status_block_e2));
		else
			BNX2X_PCI_ALLOC(sb->e1x_sb,
				&bnx2x_fp(bp, index, status_blk_mapping),
			    sizeof(struct host_hc_status_block_e1x));
#ifdef BCM_CNIC
	}
#endif

	/* FCoE Queue uses Default SB and doesn't ACK the SB, thus no need to
	 * set shortcuts for it.
	 */
	if (!IS_FCOE_IDX(index))
		set_sb_shortcuts(bp, index);

	/* Tx */
	if (!skip_tx_queue(bp, index)) {
		/* fastpath tx rings: tx_buf tx_desc */
		BNX2X_ALLOC(bnx2x_fp(bp, index, tx_buf_ring),
				sizeof(struct sw_tx_bd) * NUM_TX_BD);
		BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, tx_desc_ring),
				&bnx2x_fp(bp, index, tx_desc_mapping),
				sizeof(union eth_tx_bd_types) * NUM_TX_BD);
	}

	/* Rx */
	if (!skip_rx_queue(bp, index)) {
		/* fastpath rx rings: rx_buf rx_desc rx_comp */
		BNX2X_ALLOC(bnx2x_fp(bp, index, rx_buf_ring),
				sizeof(struct sw_rx_bd) * NUM_RX_BD);
		BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_desc_ring),
				&bnx2x_fp(bp, index, rx_desc_mapping),
				sizeof(struct eth_rx_bd) * NUM_RX_BD);

		BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_comp_ring),
				&bnx2x_fp(bp, index, rx_comp_mapping),
				sizeof(struct eth_fast_path_rx_cqe) *
				NUM_RCQ_BD);

		/* SGE ring */
		BNX2X_ALLOC(bnx2x_fp(bp, index, rx_page_ring),
				sizeof(struct sw_rx_page) * NUM_RX_SGE);
		BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_sge_ring),
				&bnx2x_fp(bp, index, rx_sge_mapping),
				BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
		/* RX BD ring */
		bnx2x_set_next_page_rx_bd(fp);

		/* CQ ring */
		bnx2x_set_next_page_rx_cq(fp);

		/* BDs */
		ring_size = bnx2x_alloc_rx_bds(fp, rx_ring_size);
		if (ring_size < rx_ring_size)
			goto alloc_mem_err;
	}

	return 0;

/* handles low memory cases */
alloc_mem_err:
	BNX2X_ERR("Unable to allocate full memory for queue %d (size %d)\n",
						index, ring_size);
	/* FW will drop all packets if queue is not big enough,
	 * In these cases we disable the queue
	 * Min size diferent for TPA and non-TPA queues
	 */
	if (ring_size < (fp->disable_tpa ?
				MIN_RX_SIZE_NONTPA : MIN_RX_SIZE_TPA)) {
			/* release memory allocated for this queue */
			bnx2x_free_fp_mem_at(bp, index);
			return -ENOMEM;
	}
	return 0;
}

int bnx2x_alloc_fp_mem(struct bnx2x *bp)
{
	int i;

	/**
	 * 1. Allocate FP for leading - fatal if error
	 * 2. {CNIC} Allocate FCoE FP - fatal if error
	 * 3. Allocate RSS - fix number of queues if error
	 */

	/* leading */
	if (bnx2x_alloc_fp_mem_at(bp, 0))
		return -ENOMEM;
#ifdef BCM_CNIC
	if (!NO_FCOE(bp))
		/* FCoE */
		if (bnx2x_alloc_fp_mem_at(bp, FCOE_IDX))
			/* we will fail load process instead of mark
			 * NO_FCOE_FLAG
			 */
			return -ENOMEM;
#endif
	/* RSS */
	for_each_nondefault_eth_queue(bp, i)
		if (bnx2x_alloc_fp_mem_at(bp, i))
			break;

	/* handle memory failures */
	if (i != BNX2X_NUM_ETH_QUEUES(bp)) {
		int delta = BNX2X_NUM_ETH_QUEUES(bp) - i;

		WARN_ON(delta < 0);
#ifdef BCM_CNIC
		/**
		 * move non eth FPs next to last eth FP
		 * must be done in that order
		 * FCOE_IDX < FWD_IDX < OOO_IDX
		 */

		/* move FCoE fp */
		bnx2x_move_fp(bp, FCOE_IDX, FCOE_IDX - delta);
#endif
		bp->num_queues -= delta;
		BNX2X_ERR("Adjusted num of queues from %d to %d\n",
			  bp->num_queues + delta, bp->num_queues);
	}

	return 0;
}

void bnx2x_free_mem_bp(struct bnx2x *bp)
{
	kfree(bp->fp);
	kfree(bp->msix_table);
	kfree(bp->ilt);
}

int __devinit bnx2x_alloc_mem_bp(struct bnx2x *bp)
{
	struct bnx2x_fastpath *fp;
	struct msix_entry *tbl;
	struct bnx2x_ilt *ilt;

	/* fp array */
	fp = kzalloc(L2_FP_COUNT(bp->l2_cid_count)*sizeof(*fp), GFP_KERNEL);
	if (!fp)
		goto alloc_err;
	bp->fp = fp;

	/* msix table */
	tbl = kzalloc((FP_SB_COUNT(bp->l2_cid_count) + 1) * sizeof(*tbl),
				  GFP_KERNEL);
	if (!tbl)
		goto alloc_err;
	bp->msix_table = tbl;

	/* ilt */
	ilt = kzalloc(sizeof(*ilt), GFP_KERNEL);
	if (!ilt)
		goto alloc_err;
	bp->ilt = ilt;

	return 0;
alloc_err:
	bnx2x_free_mem_bp(bp);
	return -ENOMEM;

}

int bnx2x_reload_if_running(struct net_device *dev)
{
	struct bnx2x *bp = netdev_priv(dev);

	if (unlikely(!netif_running(dev)))
		return 0;

	bnx2x_nic_unload(bp, UNLOAD_NORMAL);
	return bnx2x_nic_load(bp, LOAD_NORMAL);
}

int bnx2x_get_cur_phy_idx(struct bnx2x *bp)
{
	u32 sel_phy_idx = 0;
	if (bp->link_params.num_phys <= 1)
		return INT_PHY;

	if (bp->link_vars.link_up) {
		sel_phy_idx = EXT_PHY1;
		/* In case link is SERDES, check if the EXT_PHY2 is the one */
		if ((bp->link_vars.link_status & LINK_STATUS_SERDES_LINK) &&
		    (bp->link_params.phy[EXT_PHY2].supported & SUPPORTED_FIBRE))
			sel_phy_idx = EXT_PHY2;
	} else {

		switch (bnx2x_phy_selection(&bp->link_params)) {
		case PORT_HW_CFG_PHY_SELECTION_HARDWARE_DEFAULT:
		case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY:
		case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY_PRIORITY:
		       sel_phy_idx = EXT_PHY1;
		       break;
		case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY:
		case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY_PRIORITY:
		       sel_phy_idx = EXT_PHY2;
		       break;
		}
	}

	return sel_phy_idx;

}
int bnx2x_get_link_cfg_idx(struct bnx2x *bp)
{
	u32 sel_phy_idx = bnx2x_get_cur_phy_idx(bp);
	/*
	 * The selected actived PHY is always after swapping (in case PHY
	 * swapping is enabled). So when swapping is enabled, we need to reverse
	 * the configuration
	 */

	if (bp->link_params.multi_phy_config &
	    PORT_HW_CFG_PHY_SWAPPED_ENABLED) {
		if (sel_phy_idx == EXT_PHY1)
			sel_phy_idx = EXT_PHY2;
		else if (sel_phy_idx == EXT_PHY2)
			sel_phy_idx = EXT_PHY1;
	}
	return LINK_CONFIG_IDX(sel_phy_idx);
}

/* called with rtnl_lock */
int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
{
	struct bnx2x *bp = netdev_priv(dev);

	if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
		printk(KERN_ERR "Handling parity error recovery. Try again later\n");
		return -EAGAIN;
	}

	if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) ||
	    ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE))
		return -EINVAL;

	/* This does not race with packet allocation
	 * because the actual alloc size is
	 * only updated as part of load
	 */
	dev->mtu = new_mtu;

	return bnx2x_reload_if_running(dev);
}

u32 bnx2x_fix_features(struct net_device *dev, u32 features)
{
	struct bnx2x *bp = netdev_priv(dev);

	/* TPA requires Rx CSUM offloading */
	if (!(features & NETIF_F_RXCSUM) || bp->disable_tpa)
		features &= ~NETIF_F_LRO;

	return features;
}

int bnx2x_set_features(struct net_device *dev, u32 features)
{
	struct bnx2x *bp = netdev_priv(dev);
	u32 flags = bp->flags;
	bool bnx2x_reload = false;

	if (features & NETIF_F_LRO)
		flags |= TPA_ENABLE_FLAG;
	else
		flags &= ~TPA_ENABLE_FLAG;

	if (features & NETIF_F_LOOPBACK) {
		if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
			bp->link_params.loopback_mode = LOOPBACK_BMAC;
			bnx2x_reload = true;
		}
	} else {
		if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
			bp->link_params.loopback_mode = LOOPBACK_NONE;
			bnx2x_reload = true;
		}
	}

	if (flags ^ bp->flags) {
		bp->flags = flags;
		bnx2x_reload = true;
	}

	if (bnx2x_reload) {
		if (bp->recovery_state == BNX2X_RECOVERY_DONE)
			return bnx2x_reload_if_running(dev);
		/* else: bnx2x_nic_load() will be called at end of recovery */
	}

	return 0;
}

void bnx2x_tx_timeout(struct net_device *dev)
{
	struct bnx2x *bp = netdev_priv(dev);

#ifdef BNX2X_STOP_ON_ERROR
	if (!bp->panic)
		bnx2x_panic();
#endif
	/* This allows the netif to be shutdown gracefully before resetting */
	schedule_delayed_work(&bp->reset_task, 0);
}

int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct bnx2x *bp;

	if (!dev) {
		dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
		return -ENODEV;
	}
	bp = netdev_priv(dev);

	rtnl_lock();

	pci_save_state(pdev);

	if (!netif_running(dev)) {
		rtnl_unlock();
		return 0;
	}

	netif_device_detach(dev);

	bnx2x_nic_unload(bp, UNLOAD_CLOSE);

	bnx2x_set_power_state(bp, pci_choose_state(pdev, state));

	rtnl_unlock();

	return 0;
}

int bnx2x_resume(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	struct bnx2x *bp;
	int rc;

	if (!dev) {
		dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
		return -ENODEV;
	}
	bp = netdev_priv(dev);

	if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
		printk(KERN_ERR "Handling parity error recovery. Try again later\n");
		return -EAGAIN;
	}

	rtnl_lock();

	pci_restore_state(pdev);

	if (!netif_running(dev)) {
		rtnl_unlock();
		return 0;
	}

	bnx2x_set_power_state(bp, PCI_D0);
	netif_device_attach(dev);

	/* Since the chip was reset, clear the FW sequence number */
	bp->fw_seq = 0;
	rc = bnx2x_nic_load(bp, LOAD_OPEN);

	rtnl_unlock();

	return rc;
}


void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
			      u32 cid)
{
	/* ustorm cxt validation */
	cxt->ustorm_ag_context.cdu_usage =
		CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
			CDU_REGION_NUMBER_UCM_AG, ETH_CONNECTION_TYPE);
	/* xcontext validation */
	cxt->xstorm_ag_context.cdu_reserved =
		CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
			CDU_REGION_NUMBER_XCM_AG, ETH_CONNECTION_TYPE);
}

static inline void storm_memset_hc_timeout(struct bnx2x *bp, u8 port,
					     u8 fw_sb_id, u8 sb_index,
					     u8 ticks)
{

	u32 addr = BAR_CSTRORM_INTMEM +
		   CSTORM_STATUS_BLOCK_DATA_TIMEOUT_OFFSET(fw_sb_id, sb_index);
	REG_WR8(bp, addr, ticks);
	DP(NETIF_MSG_HW, "port %x fw_sb_id %d sb_index %d ticks %d\n",
			  port, fw_sb_id, sb_index, ticks);
}

static inline void storm_memset_hc_disable(struct bnx2x *bp, u8 port,
					     u16 fw_sb_id, u8 sb_index,
					     u8 disable)
{
	u32 enable_flag = disable ? 0 : (1 << HC_INDEX_DATA_HC_ENABLED_SHIFT);
	u32 addr = BAR_CSTRORM_INTMEM +
		   CSTORM_STATUS_BLOCK_DATA_FLAGS_OFFSET(fw_sb_id, sb_index);
	u16 flags = REG_RD16(bp, addr);
	/* clear and set */
	flags &= ~HC_INDEX_DATA_HC_ENABLED;
	flags |= enable_flag;
	REG_WR16(bp, addr, flags);
	DP(NETIF_MSG_HW, "port %x fw_sb_id %d sb_index %d disable %d\n",
			  port, fw_sb_id, sb_index, disable);
}

void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
				    u8 sb_index, u8 disable, u16 usec)
{
	int port = BP_PORT(bp);
	u8 ticks = usec / BNX2X_BTR;

	storm_memset_hc_timeout(bp, port, fw_sb_id, sb_index, ticks);

	disable = disable ? 1 : (usec ? 0 : 1);
	storm_memset_hc_disable(bp, port, fw_sb_id, sb_index, disable);
}