chelsio: Move the Chelsio drivers

Moves the drivers for the Chelsio chipsets into
drivers/net/ethernet/chelsio/ and the necessary Kconfig and Makefile
changes.

CC: Divy Le Ray <divy@chelsio.com>
CC: Dimitris Michailidis <dm@chelsio.com>
CC: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 2140 deletions

diff --git a/drivers/net/chelsio/sge.c b/drivers/net/chelsio/sge.c
deleted file mode 100644
index e9a03fffef15..000000000000
--- a/drivers/net/chelsio/sge.c
+++ /dev/null
@@ -1,2140 +0,0 @@
-/*****************************************************************************
- *                                                                           *
- * File: sge.c                                                               *
- * $Revision: 1.26 $                                                         *
- * $Date: 2005/06/21 18:29:48 $                                              *
- * Description:                                                              *
- *  DMA engine.                                                              *
- *  part of the Chelsio 10Gb Ethernet Driver.                                *
- *                                                                           *
- * This program is free software; you can redistribute it and/or modify      *
- * it under the terms of the GNU General Public License, version 2, as       *
- * published by the Free Software Foundation.                                *
- *                                                                           *
- * You should have received a copy of the GNU General Public License along   *
- * with this program; if not, write to the Free Software Foundation, Inc.,   *
- * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.                 *
- *                                                                           *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED    *
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF      *
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.                     *
- *                                                                           *
- * http://www.chelsio.com                                                    *
- *                                                                           *
- * Copyright (c) 2003 - 2005 Chelsio Communications, Inc.                    *
- * All rights reserved.                                                      *
- *                                                                           *
- * Maintainers: maintainers@chelsio.com                                      *
- *                                                                           *
- * Authors: Dimitrios Michailidis   <dm@chelsio.com>                         *
- *          Tina Yang               <tainay@chelsio.com>                     *
- *          Felix Marti             <felix@chelsio.com>                      *
- *          Scott Bardone           <sbardone@chelsio.com>                   *
- *          Kurt Ottaway            <kottaway@chelsio.com>                   *
- *          Frank DiMambro          <frank@chelsio.com>                      *
- *                                                                           *
- * History:                                                                  *
- *                                                                           *
- ****************************************************************************/
-
-#include "common.h"
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/pci.h>
-#include <linux/ktime.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_vlan.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/tcp.h>
-#include <linux/ip.h>
-#include <linux/in.h>
-#include <linux/if_arp.h>
-#include <linux/slab.h>
-#include <linux/prefetch.h>
-
-#include "cpl5_cmd.h"
-#include "sge.h"
-#include "regs.h"
-#include "espi.h"
-
-/* This belongs in if_ether.h */
-#define ETH_P_CPL5 0xf
-
-#define SGE_CMDQ_N		2
-#define SGE_FREELQ_N		2
-#define SGE_CMDQ0_E_N		1024
-#define SGE_CMDQ1_E_N		128
-#define SGE_FREEL_SIZE		4096
-#define SGE_JUMBO_FREEL_SIZE	512
-#define SGE_FREEL_REFILL_THRESH	16
-#define SGE_RESPQ_E_N		1024
-#define SGE_INTRTIMER_NRES	1000
-#define SGE_RX_SM_BUF_SIZE	1536
-#define SGE_TX_DESC_MAX_PLEN	16384
-
-#define SGE_RESPQ_REPLENISH_THRES (SGE_RESPQ_E_N / 4)
-
-/*
- * Period of the TX buffer reclaim timer.  This timer does not need to run
- * frequently as TX buffers are usually reclaimed by new TX packets.
- */
-#define TX_RECLAIM_PERIOD (HZ / 4)
-
-#define M_CMD_LEN       0x7fffffff
-#define V_CMD_LEN(v)    (v)
-#define G_CMD_LEN(v)    ((v) & M_CMD_LEN)
-#define V_CMD_GEN1(v)   ((v) << 31)
-#define V_CMD_GEN2(v)   (v)
-#define F_CMD_DATAVALID (1 << 1)
-#define F_CMD_SOP       (1 << 2)
-#define V_CMD_EOP(v)    ((v) << 3)
-
-/*
- * Command queue, receive buffer list, and response queue descriptors.
- */
-#if defined(__BIG_ENDIAN_BITFIELD)
-struct cmdQ_e {
-	u32 addr_lo;
-	u32 len_gen;
-	u32 flags;
-	u32 addr_hi;
-};
-
-struct freelQ_e {
-	u32 addr_lo;
-	u32 len_gen;
-	u32 gen2;
-	u32 addr_hi;
-};
-
-struct respQ_e {
-	u32 Qsleeping		: 4;
-	u32 Cmdq1CreditReturn	: 5;
-	u32 Cmdq1DmaComplete	: 5;
-	u32 Cmdq0CreditReturn	: 5;
-	u32 Cmdq0DmaComplete	: 5;
-	u32 FreelistQid		: 2;
-	u32 CreditValid		: 1;
-	u32 DataValid		: 1;
-	u32 Offload		: 1;
-	u32 Eop			: 1;
-	u32 Sop			: 1;
-	u32 GenerationBit	: 1;
-	u32 BufferLength;
-};
-#elif defined(__LITTLE_ENDIAN_BITFIELD)
-struct cmdQ_e {
-	u32 len_gen;
-	u32 addr_lo;
-	u32 addr_hi;
-	u32 flags;
-};
-
-struct freelQ_e {
-	u32 len_gen;
-	u32 addr_lo;
-	u32 addr_hi;
-	u32 gen2;
-};
-
-struct respQ_e {
-	u32 BufferLength;
-	u32 GenerationBit	: 1;
-	u32 Sop			: 1;
-	u32 Eop			: 1;
-	u32 Offload		: 1;
-	u32 DataValid		: 1;
-	u32 CreditValid		: 1;
-	u32 FreelistQid		: 2;
-	u32 Cmdq0DmaComplete	: 5;
-	u32 Cmdq0CreditReturn	: 5;
-	u32 Cmdq1DmaComplete	: 5;
-	u32 Cmdq1CreditReturn	: 5;
-	u32 Qsleeping		: 4;
-} ;
-#endif
-
-/*
- * SW Context Command and Freelist Queue Descriptors
- */
-struct cmdQ_ce {
-	struct sk_buff *skb;
-	DEFINE_DMA_UNMAP_ADDR(dma_addr);
-	DEFINE_DMA_UNMAP_LEN(dma_len);
-};
-
-struct freelQ_ce {
-	struct sk_buff *skb;
-	DEFINE_DMA_UNMAP_ADDR(dma_addr);
-	DEFINE_DMA_UNMAP_LEN(dma_len);
-};
-
-/*
- * SW command, freelist and response rings
- */
-struct cmdQ {
-	unsigned long   status;         /* HW DMA fetch status */
-	unsigned int    in_use;         /* # of in-use command descriptors */
-	unsigned int	size;	        /* # of descriptors */
-	unsigned int    processed;      /* total # of descs HW has processed */
-	unsigned int    cleaned;        /* total # of descs SW has reclaimed */
-	unsigned int    stop_thres;     /* SW TX queue suspend threshold */
-	u16		pidx;           /* producer index (SW) */
-	u16		cidx;           /* consumer index (HW) */
-	u8		genbit;         /* current generation (=valid) bit */
-	u8              sop;            /* is next entry start of packet? */
-	struct cmdQ_e  *entries;        /* HW command descriptor Q */
-	struct cmdQ_ce *centries;       /* SW command context descriptor Q */
-	dma_addr_t	dma_addr;       /* DMA addr HW command descriptor Q */
-	spinlock_t	lock;           /* Lock to protect cmdQ enqueuing */
-};
-
-struct freelQ {
-	unsigned int	credits;        /* # of available RX buffers */
-	unsigned int	size;	        /* free list capacity */
-	u16		pidx;           /* producer index (SW) */
-	u16		cidx;           /* consumer index (HW) */
-	u16		rx_buffer_size; /* Buffer size on this free list */
-	u16             dma_offset;     /* DMA offset to align IP headers */
-	u16             recycleq_idx;   /* skb recycle q to use */
-	u8		genbit;	        /* current generation (=valid) bit */
-	struct freelQ_e	*entries;       /* HW freelist descriptor Q */
-	struct freelQ_ce *centries;     /* SW freelist context descriptor Q */
-	dma_addr_t	dma_addr;       /* DMA addr HW freelist descriptor Q */
-};
-
-struct respQ {
-	unsigned int	credits;        /* credits to be returned to SGE */
-	unsigned int	size;	        /* # of response Q descriptors */
-	u16		cidx;	        /* consumer index (SW) */
-	u8		genbit;	        /* current generation(=valid) bit */
-	struct respQ_e *entries;        /* HW response descriptor Q */
-	dma_addr_t	dma_addr;       /* DMA addr HW response descriptor Q */
-};
-
-/* Bit flags for cmdQ.status */
-enum {
-	CMDQ_STAT_RUNNING = 1,          /* fetch engine is running */
-	CMDQ_STAT_LAST_PKT_DB = 2       /* last packet rung the doorbell */
-};
-
-/* T204 TX SW scheduler */
-
-/* Per T204 TX port */
-struct sched_port {
-	unsigned int	avail;		/* available bits - quota */
-	unsigned int	drain_bits_per_1024ns; /* drain rate */
-	unsigned int	speed;		/* drain rate, mbps */
-	unsigned int	mtu;		/* mtu size */
-	struct sk_buff_head skbq;	/* pending skbs */
-};
-
-/* Per T204 device */
-struct sched {
-	ktime_t         last_updated;   /* last time quotas were computed */
-	unsigned int	max_avail;	/* max bits to be sent to any port */
-	unsigned int	port;		/* port index (round robin ports) */
-	unsigned int	num;		/* num skbs in per port queues */
-	struct sched_port p[MAX_NPORTS];
-	struct tasklet_struct sched_tsk;/* tasklet used to run scheduler */
-};
-static void restart_sched(unsigned long);
-
-
-/*
- * Main SGE data structure
- *
- * Interrupts are handled by a single CPU and it is likely that on a MP system
- * the application is migrated to another CPU. In that scenario, we try to
- * separate the RX(in irq context) and TX state in order to decrease memory
- * contention.
- */
-struct sge {
-	struct adapter *adapter;	/* adapter backpointer */
-	struct net_device *netdev;      /* netdevice backpointer */
-	struct freelQ	freelQ[SGE_FREELQ_N]; /* buffer free lists */
-	struct respQ	respQ;		/* response Q */
-	unsigned long   stopped_tx_queues; /* bitmap of suspended Tx queues */
-	unsigned int	rx_pkt_pad;     /* RX padding for L2 packets */
-	unsigned int	jumbo_fl;       /* jumbo freelist Q index */
-	unsigned int	intrtimer_nres;	/* no-resource interrupt timer */
-	unsigned int    fixed_intrtimer;/* non-adaptive interrupt timer */
-	struct timer_list tx_reclaim_timer; /* reclaims TX buffers */
-	struct timer_list espibug_timer;
-	unsigned long	espibug_timeout;
-	struct sk_buff	*espibug_skb[MAX_NPORTS];
-	u32		sge_control;	/* shadow value of sge control reg */
-	struct sge_intr_counts stats;
-	struct sge_port_stats __percpu *port_stats[MAX_NPORTS];
-	struct sched	*tx_sched;
-	struct cmdQ cmdQ[SGE_CMDQ_N] ____cacheline_aligned_in_smp;
-};
-
-static const u8 ch_mac_addr[ETH_ALEN] = {
-	0x0, 0x7, 0x43, 0x0, 0x0, 0x0
-};
-
-/*
- * stop tasklet and free all pending skb's
- */
-static void tx_sched_stop(struct sge *sge)
-{
-	struct sched *s = sge->tx_sched;
-	int i;
-
-	tasklet_kill(&s->sched_tsk);
-
-	for (i = 0; i < MAX_NPORTS; i++)
-		__skb_queue_purge(&s->p[s->port].skbq);
-}
-
-/*
- * t1_sched_update_parms() is called when the MTU or link speed changes. It
- * re-computes scheduler parameters to scope with the change.
- */
-unsigned int t1_sched_update_parms(struct sge *sge, unsigned int port,
-				   unsigned int mtu, unsigned int speed)
-{
-	struct sched *s = sge->tx_sched;
-	struct sched_port *p = &s->p[port];
-	unsigned int max_avail_segs;
-
-	pr_debug("t1_sched_update_params mtu=%d speed=%d\n", mtu, speed);
-	if (speed)
-		p->speed = speed;
-	if (mtu)
-		p->mtu = mtu;
-
-	if (speed || mtu) {
-		unsigned long long drain = 1024ULL * p->speed * (p->mtu - 40);
-		do_div(drain, (p->mtu + 50) * 1000);
-		p->drain_bits_per_1024ns = (unsigned int) drain;
-
-		if (p->speed < 1000)
-			p->drain_bits_per_1024ns =
-				90 * p->drain_bits_per_1024ns / 100;
-	}
-
-	if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204) {
-		p->drain_bits_per_1024ns -= 16;
-		s->max_avail = max(4096U, p->mtu + 16 + 14 + 4);
-		max_avail_segs = max(1U, 4096 / (p->mtu - 40));
-	} else {
-		s->max_avail = 16384;
-		max_avail_segs = max(1U, 9000 / (p->mtu - 40));
-	}
-
-	pr_debug("t1_sched_update_parms: mtu %u speed %u max_avail %u "
-		 "max_avail_segs %u drain_bits_per_1024ns %u\n", p->mtu,
-		 p->speed, s->max_avail, max_avail_segs,
-		 p->drain_bits_per_1024ns);
-
-	return max_avail_segs * (p->mtu - 40);
-}
-
-#if 0
-
-/*
- * t1_sched_max_avail_bytes() tells the scheduler the maximum amount of
- * data that can be pushed per port.
- */
-void t1_sched_set_max_avail_bytes(struct sge *sge, unsigned int val)
-{
-	struct sched *s = sge->tx_sched;
-	unsigned int i;
-
-	s->max_avail = val;
-	for (i = 0; i < MAX_NPORTS; i++)
-		t1_sched_update_parms(sge, i, 0, 0);
-}
-
-/*
- * t1_sched_set_drain_bits_per_us() tells the scheduler at which rate a port
- * is draining.
- */
-void t1_sched_set_drain_bits_per_us(struct sge *sge, unsigned int port,
-					 unsigned int val)
-{
-	struct sched *s = sge->tx_sched;
-	struct sched_port *p = &s->p[port];
-	p->drain_bits_per_1024ns = val * 1024 / 1000;
-	t1_sched_update_parms(sge, port, 0, 0);
-}
-
-#endif  /*  0  */
-
-
-/*
- * get_clock() implements a ns clock (see ktime_get)
- */
-static inline ktime_t get_clock(void)
-{
-	struct timespec ts;
-
-	ktime_get_ts(&ts);
-	return timespec_to_ktime(ts);
-}
-
-/*
- * tx_sched_init() allocates resources and does basic initialization.
- */
-static int tx_sched_init(struct sge *sge)
-{
-	struct sched *s;
-	int i;
-
-	s = kzalloc(sizeof (struct sched), GFP_KERNEL);
-	if (!s)
-		return -ENOMEM;
-
-	pr_debug("tx_sched_init\n");
-	tasklet_init(&s->sched_tsk, restart_sched, (unsigned long) sge);
-	sge->tx_sched = s;
-
-	for (i = 0; i < MAX_NPORTS; i++) {
-		skb_queue_head_init(&s->p[i].skbq);
-		t1_sched_update_parms(sge, i, 1500, 1000);
-	}
-
-	return 0;
-}
-
-/*
- * sched_update_avail() computes the delta since the last time it was called
- * and updates the per port quota (number of bits that can be sent to the any
- * port).
- */
-static inline int sched_update_avail(struct sge *sge)
-{
-	struct sched *s = sge->tx_sched;
-	ktime_t now = get_clock();
-	unsigned int i;
-	long long delta_time_ns;
-
-	delta_time_ns = ktime_to_ns(ktime_sub(now, s->last_updated));
-
-	pr_debug("sched_update_avail delta=%lld\n", delta_time_ns);
-	if (delta_time_ns < 15000)
-		return 0;
-
-	for (i = 0; i < MAX_NPORTS; i++) {
-		struct sched_port *p = &s->p[i];
-		unsigned int delta_avail;
-
-		delta_avail = (p->drain_bits_per_1024ns * delta_time_ns) >> 13;
-		p->avail = min(p->avail + delta_avail, s->max_avail);
-	}
-
-	s->last_updated = now;
-
-	return 1;
-}
-
-/*
- * sched_skb() is called from two different places. In the tx path, any
- * packet generating load on an output port will call sched_skb()
- * (skb != NULL). In addition, sched_skb() is called from the irq/soft irq
- * context (skb == NULL).
- * The scheduler only returns a skb (which will then be sent) if the
- * length of the skb is <= the current quota of the output port.
- */
-static struct sk_buff *sched_skb(struct sge *sge, struct sk_buff *skb,
-				unsigned int credits)
-{
-	struct sched *s = sge->tx_sched;
-	struct sk_buff_head *skbq;
-	unsigned int i, len, update = 1;
-
-	pr_debug("sched_skb %p\n", skb);
-	if (!skb) {
-		if (!s->num)
-			return NULL;
-	} else {
-		skbq = &s->p[skb->dev->if_port].skbq;
-		__skb_queue_tail(skbq, skb);
-		s->num++;
-		skb = NULL;
-	}
-
-	if (credits < MAX_SKB_FRAGS + 1)
-		goto out;
-
-again:
-	for (i = 0; i < MAX_NPORTS; i++) {
-		s->port = (s->port + 1) & (MAX_NPORTS - 1);
-		skbq = &s->p[s->port].skbq;
-
-		skb = skb_peek(skbq);
-
-		if (!skb)
-			continue;
-
-		len = skb->len;
-		if (len <= s->p[s->port].avail) {
-			s->p[s->port].avail -= len;
-			s->num--;
-			__skb_unlink(skb, skbq);
-			goto out;
-		}
-		skb = NULL;
-	}
-
-	if (update-- && sched_update_avail(sge))
-		goto again;
-
-out:
-	/* If there are more pending skbs, we use the hardware to schedule us
-	 * again.
-	 */
-	if (s->num && !skb) {
-		struct cmdQ *q = &sge->cmdQ[0];
-		clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-		if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) {
-			set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-			writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL);
-		}
-	}
-	pr_debug("sched_skb ret %p\n", skb);
-
-	return skb;
-}
-
-/*
- * PIO to indicate that memory mapped Q contains valid descriptor(s).
- */
-static inline void doorbell_pio(struct adapter *adapter, u32 val)
-{
-	wmb();
-	writel(val, adapter->regs + A_SG_DOORBELL);
-}
-
-/*
- * Frees all RX buffers on the freelist Q. The caller must make sure that
- * the SGE is turned off before calling this function.
- */
-static void free_freelQ_buffers(struct pci_dev *pdev, struct freelQ *q)
-{
-	unsigned int cidx = q->cidx;
-
-	while (q->credits--) {
-		struct freelQ_ce *ce = &q->centries[cidx];
-
-		pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr),
-				 dma_unmap_len(ce, dma_len),
-				 PCI_DMA_FROMDEVICE);
-		dev_kfree_skb(ce->skb);
-		ce->skb = NULL;
-		if (++cidx == q->size)
-			cidx = 0;
-	}
-}
-
-/*
- * Free RX free list and response queue resources.
- */
-static void free_rx_resources(struct sge *sge)
-{
-	struct pci_dev *pdev = sge->adapter->pdev;
-	unsigned int size, i;
-
-	if (sge->respQ.entries) {
-		size = sizeof(struct respQ_e) * sge->respQ.size;
-		pci_free_consistent(pdev, size, sge->respQ.entries,
-				    sge->respQ.dma_addr);
-	}
-
-	for (i = 0; i < SGE_FREELQ_N; i++) {
-		struct freelQ *q = &sge->freelQ[i];
-
-		if (q->centries) {
-			free_freelQ_buffers(pdev, q);
-			kfree(q->centries);
-		}
-		if (q->entries) {
-			size = sizeof(struct freelQ_e) * q->size;
-			pci_free_consistent(pdev, size, q->entries,
-					    q->dma_addr);
-		}
-	}
-}
-
-/*
- * Allocates basic RX resources, consisting of memory mapped freelist Qs and a
- * response queue.
- */
-static int alloc_rx_resources(struct sge *sge, struct sge_params *p)
-{
-	struct pci_dev *pdev = sge->adapter->pdev;
-	unsigned int size, i;
-
-	for (i = 0; i < SGE_FREELQ_N; i++) {
-		struct freelQ *q = &sge->freelQ[i];
-
-		q->genbit = 1;
-		q->size = p->freelQ_size[i];
-		q->dma_offset = sge->rx_pkt_pad ? 0 : NET_IP_ALIGN;
-		size = sizeof(struct freelQ_e) * q->size;
-		q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr);
-		if (!q->entries)
-			goto err_no_mem;
-
-		size = sizeof(struct freelQ_ce) * q->size;
-		q->centries = kzalloc(size, GFP_KERNEL);
-		if (!q->centries)
-			goto err_no_mem;
-	}
-
-	/*
-	 * Calculate the buffer sizes for the two free lists.  FL0 accommodates
-	 * regular sized Ethernet frames, FL1 is sized not to exceed 16K,
-	 * including all the sk_buff overhead.
-	 *
-	 * Note: For T2 FL0 and FL1 are reversed.
-	 */
-	sge->freelQ[!sge->jumbo_fl].rx_buffer_size = SGE_RX_SM_BUF_SIZE +
-		sizeof(struct cpl_rx_data) +
-		sge->freelQ[!sge->jumbo_fl].dma_offset;
-
-		size = (16 * 1024) -
-		    SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-
-	sge->freelQ[sge->jumbo_fl].rx_buffer_size = size;
-
-	/*
-	 * Setup which skb recycle Q should be used when recycling buffers from
-	 * each free list.
-	 */
-	sge->freelQ[!sge->jumbo_fl].recycleq_idx = 0;
-	sge->freelQ[sge->jumbo_fl].recycleq_idx = 1;
-
-	sge->respQ.genbit = 1;
-	sge->respQ.size = SGE_RESPQ_E_N;
-	sge->respQ.credits = 0;
-	size = sizeof(struct respQ_e) * sge->respQ.size;
-	sge->respQ.entries =
-		pci_alloc_consistent(pdev, size, &sge->respQ.dma_addr);
-	if (!sge->respQ.entries)
-		goto err_no_mem;
-	return 0;
-
-err_no_mem:
-	free_rx_resources(sge);
-	return -ENOMEM;
-}
-
-/*
- * Reclaims n TX descriptors and frees the buffers associated with them.
- */
-static void free_cmdQ_buffers(struct sge *sge, struct cmdQ *q, unsigned int n)
-{
-	struct cmdQ_ce *ce;
-	struct pci_dev *pdev = sge->adapter->pdev;
-	unsigned int cidx = q->cidx;
-
-	q->in_use -= n;
-	ce = &q->centries[cidx];
-	while (n--) {
-		if (likely(dma_unmap_len(ce, dma_len))) {
-			pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr),
-					 dma_unmap_len(ce, dma_len),
-					 PCI_DMA_TODEVICE);
-			if (q->sop)
-				q->sop = 0;
-		}
-		if (ce->skb) {
-			dev_kfree_skb_any(ce->skb);
-			q->sop = 1;
-		}
-		ce++;
-		if (++cidx == q->size) {
-			cidx = 0;
-			ce = q->centries;
-		}
-	}
-	q->cidx = cidx;
-}
-
-/*
- * Free TX resources.
- *
- * Assumes that SGE is stopped and all interrupts are disabled.
- */
-static void free_tx_resources(struct sge *sge)
-{
-	struct pci_dev *pdev = sge->adapter->pdev;
-	unsigned int size, i;
-
-	for (i = 0; i < SGE_CMDQ_N; i++) {
-		struct cmdQ *q = &sge->cmdQ[i];
-
-		if (q->centries) {
-			if (q->in_use)
-				free_cmdQ_buffers(sge, q, q->in_use);
-			kfree(q->centries);
-		}
-		if (q->entries) {
-			size = sizeof(struct cmdQ_e) * q->size;
-			pci_free_consistent(pdev, size, q->entries,
-					    q->dma_addr);
-		}
-	}
-}
-
-/*
- * Allocates basic TX resources, consisting of memory mapped command Qs.
- */
-static int alloc_tx_resources(struct sge *sge, struct sge_params *p)
-{
-	struct pci_dev *pdev = sge->adapter->pdev;
-	unsigned int size, i;
-
-	for (i = 0; i < SGE_CMDQ_N; i++) {
-		struct cmdQ *q = &sge->cmdQ[i];
-
-		q->genbit = 1;
-		q->sop = 1;
-		q->size = p->cmdQ_size[i];
-		q->in_use = 0;
-		q->status = 0;
-		q->processed = q->cleaned = 0;
-		q->stop_thres = 0;
-		spin_lock_init(&q->lock);
-		size = sizeof(struct cmdQ_e) * q->size;
-		q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr);
-		if (!q->entries)
-			goto err_no_mem;
-
-		size = sizeof(struct cmdQ_ce) * q->size;
-		q->centries = kzalloc(size, GFP_KERNEL);
-		if (!q->centries)
-			goto err_no_mem;
-	}
-
-	/*
-	 * CommandQ 0 handles Ethernet and TOE packets, while queue 1 is TOE
-	 * only.  For queue 0 set the stop threshold so we can handle one more
-	 * packet from each port, plus reserve an additional 24 entries for
-	 * Ethernet packets only.  Queue 1 never suspends nor do we reserve
-	 * space for Ethernet packets.
-	 */
-	sge->cmdQ[0].stop_thres = sge->adapter->params.nports *
-		(MAX_SKB_FRAGS + 1);
-	return 0;
-
-err_no_mem:
-	free_tx_resources(sge);
-	return -ENOMEM;
-}
-
-static inline void setup_ring_params(struct adapter *adapter, u64 addr,
-				     u32 size, int base_reg_lo,
-				     int base_reg_hi, int size_reg)
-{
-	writel((u32)addr, adapter->regs + base_reg_lo);
-	writel(addr >> 32, adapter->regs + base_reg_hi);
-	writel(size, adapter->regs + size_reg);
-}
-
-/*
- * Enable/disable VLAN acceleration.
- */
-void t1_vlan_mode(struct adapter *adapter, u32 features)
-{
-	struct sge *sge = adapter->sge;
-
-	if (features & NETIF_F_HW_VLAN_RX)
-		sge->sge_control |= F_VLAN_XTRACT;
-	else
-		sge->sge_control &= ~F_VLAN_XTRACT;
-	if (adapter->open_device_map) {
-		writel(sge->sge_control, adapter->regs + A_SG_CONTROL);
-		readl(adapter->regs + A_SG_CONTROL);   /* flush */
-	}
-}
-
-/*
- * Programs the various SGE registers. However, the engine is not yet enabled,
- * but sge->sge_control is setup and ready to go.
- */
-static void configure_sge(struct sge *sge, struct sge_params *p)
-{
-	struct adapter *ap = sge->adapter;
-
-	writel(0, ap->regs + A_SG_CONTROL);
-	setup_ring_params(ap, sge->cmdQ[0].dma_addr, sge->cmdQ[0].size,
-			  A_SG_CMD0BASELWR, A_SG_CMD0BASEUPR, A_SG_CMD0SIZE);
-	setup_ring_params(ap, sge->cmdQ[1].dma_addr, sge->cmdQ[1].size,
-			  A_SG_CMD1BASELWR, A_SG_CMD1BASEUPR, A_SG_CMD1SIZE);
-	setup_ring_params(ap, sge->freelQ[0].dma_addr,
-			  sge->freelQ[0].size, A_SG_FL0BASELWR,
-			  A_SG_FL0BASEUPR, A_SG_FL0SIZE);
-	setup_ring_params(ap, sge->freelQ[1].dma_addr,
-			  sge->freelQ[1].size, A_SG_FL1BASELWR,
-			  A_SG_FL1BASEUPR, A_SG_FL1SIZE);
-
-	/* The threshold comparison uses <. */
-	writel(SGE_RX_SM_BUF_SIZE + 1, ap->regs + A_SG_FLTHRESHOLD);
-
-	setup_ring_params(ap, sge->respQ.dma_addr, sge->respQ.size,
-			  A_SG_RSPBASELWR, A_SG_RSPBASEUPR, A_SG_RSPSIZE);
-	writel((u32)sge->respQ.size - 1, ap->regs + A_SG_RSPQUEUECREDIT);
-
-	sge->sge_control = F_CMDQ0_ENABLE | F_CMDQ1_ENABLE | F_FL0_ENABLE |
-		F_FL1_ENABLE | F_CPL_ENABLE | F_RESPONSE_QUEUE_ENABLE |
-		V_CMDQ_PRIORITY(2) | F_DISABLE_CMDQ1_GTS | F_ISCSI_COALESCE |
-		V_RX_PKT_OFFSET(sge->rx_pkt_pad);
-
-#if defined(__BIG_ENDIAN_BITFIELD)
-	sge->sge_control |= F_ENABLE_BIG_ENDIAN;
-#endif
-
-	/* Initialize no-resource timer */
-	sge->intrtimer_nres = SGE_INTRTIMER_NRES * core_ticks_per_usec(ap);
-
-	t1_sge_set_coalesce_params(sge, p);
-}
-
-/*
- * Return the payload capacity of the jumbo free-list buffers.
- */
-static inline unsigned int jumbo_payload_capacity(const struct sge *sge)
-{
-	return sge->freelQ[sge->jumbo_fl].rx_buffer_size -
-		sge->freelQ[sge->jumbo_fl].dma_offset -
-		sizeof(struct cpl_rx_data);
-}
-
-/*
- * Frees all SGE related resources and the sge structure itself
- */
-void t1_sge_destroy(struct sge *sge)
-{
-	int i;
-
-	for_each_port(sge->adapter, i)
-		free_percpu(sge->port_stats[i]);
-
-	kfree(sge->tx_sched);
-	free_tx_resources(sge);
-	free_rx_resources(sge);
-	kfree(sge);
-}
-
-/*
- * Allocates new RX buffers on the freelist Q (and tracks them on the freelist
- * context Q) until the Q is full or alloc_skb fails.
- *
- * It is possible that the generation bits already match, indicating that the
- * buffer is already valid and nothing needs to be done. This happens when we
- * copied a received buffer into a new sk_buff during the interrupt processing.
- *
- * If the SGE doesn't automatically align packets properly (!sge->rx_pkt_pad),
- * we specify a RX_OFFSET in order to make sure that the IP header is 4B
- * aligned.
- */
-static void refill_free_list(struct sge *sge, struct freelQ *q)
-{
-	struct pci_dev *pdev = sge->adapter->pdev;
-	struct freelQ_ce *ce = &q->centries[q->pidx];
-	struct freelQ_e *e = &q->entries[q->pidx];
-	unsigned int dma_len = q->rx_buffer_size - q->dma_offset;
-
-	while (q->credits < q->size) {
-		struct sk_buff *skb;
-		dma_addr_t mapping;
-
-		skb = alloc_skb(q->rx_buffer_size, GFP_ATOMIC);
-		if (!skb)
-			break;
-
-		skb_reserve(skb, q->dma_offset);
-		mapping = pci_map_single(pdev, skb->data, dma_len,
-					 PCI_DMA_FROMDEVICE);
-		skb_reserve(skb, sge->rx_pkt_pad);
-
-		ce->skb = skb;
-		dma_unmap_addr_set(ce, dma_addr, mapping);
-		dma_unmap_len_set(ce, dma_len, dma_len);
-		e->addr_lo = (u32)mapping;
-		e->addr_hi = (u64)mapping >> 32;
-		e->len_gen = V_CMD_LEN(dma_len) | V_CMD_GEN1(q->genbit);
-		wmb();
-		e->gen2 = V_CMD_GEN2(q->genbit);
-
-		e++;
-		ce++;
-		if (++q->pidx == q->size) {
-			q->pidx = 0;
-			q->genbit ^= 1;
-			ce = q->centries;
-			e = q->entries;
-		}
-		q->credits++;
-	}
-}
-
-/*
- * Calls refill_free_list for both free lists. If we cannot fill at least 1/4
- * of both rings, we go into 'few interrupt mode' in order to give the system
- * time to free up resources.
- */
-static void freelQs_empty(struct sge *sge)
-{
-	struct adapter *adapter = sge->adapter;
-	u32 irq_reg = readl(adapter->regs + A_SG_INT_ENABLE);
-	u32 irqholdoff_reg;
-
-	refill_free_list(sge, &sge->freelQ[0]);
-	refill_free_list(sge, &sge->freelQ[1]);
-
-	if (sge->freelQ[0].credits > (sge->freelQ[0].size >> 2) &&
-	    sge->freelQ[1].credits > (sge->freelQ[1].size >> 2)) {
-		irq_reg |= F_FL_EXHAUSTED;
-		irqholdoff_reg = sge->fixed_intrtimer;
-	} else {
-		/* Clear the F_FL_EXHAUSTED interrupts for now */
-		irq_reg &= ~F_FL_EXHAUSTED;
-		irqholdoff_reg = sge->intrtimer_nres;
-	}
-	writel(irqholdoff_reg, adapter->regs + A_SG_INTRTIMER);
-	writel(irq_reg, adapter->regs + A_SG_INT_ENABLE);
-
-	/* We reenable the Qs to force a freelist GTS interrupt later */
-	doorbell_pio(adapter, F_FL0_ENABLE | F_FL1_ENABLE);
-}
-
-#define SGE_PL_INTR_MASK (F_PL_INTR_SGE_ERR | F_PL_INTR_SGE_DATA)
-#define SGE_INT_FATAL (F_RESPQ_OVERFLOW | F_PACKET_TOO_BIG | F_PACKET_MISMATCH)
-#define SGE_INT_ENABLE (F_RESPQ_EXHAUSTED | F_RESPQ_OVERFLOW | \
-			F_FL_EXHAUSTED | F_PACKET_TOO_BIG | F_PACKET_MISMATCH)
-
-/*
- * Disable SGE Interrupts
- */
-void t1_sge_intr_disable(struct sge *sge)
-{
-	u32 val = readl(sge->adapter->regs + A_PL_ENABLE);
-
-	writel(val & ~SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE);
-	writel(0, sge->adapter->regs + A_SG_INT_ENABLE);
-}
-
-/*
- * Enable SGE interrupts.
- */
-void t1_sge_intr_enable(struct sge *sge)
-{
-	u32 en = SGE_INT_ENABLE;
-	u32 val = readl(sge->adapter->regs + A_PL_ENABLE);
-
-	if (sge->adapter->port[0].dev->hw_features & NETIF_F_TSO)
-		en &= ~F_PACKET_TOO_BIG;
-	writel(en, sge->adapter->regs + A_SG_INT_ENABLE);
-	writel(val | SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE);
-}
-
-/*
- * Clear SGE interrupts.
- */
-void t1_sge_intr_clear(struct sge *sge)
-{
-	writel(SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_CAUSE);
-	writel(0xffffffff, sge->adapter->regs + A_SG_INT_CAUSE);
-}
-
-/*
- * SGE 'Error' interrupt handler
- */
-int t1_sge_intr_error_handler(struct sge *sge)
-{
-	struct adapter *adapter = sge->adapter;
-	u32 cause = readl(adapter->regs + A_SG_INT_CAUSE);
-
-	if (adapter->port[0].dev->hw_features & NETIF_F_TSO)
-		cause &= ~F_PACKET_TOO_BIG;
-	if (cause & F_RESPQ_EXHAUSTED)
-		sge->stats.respQ_empty++;
-	if (cause & F_RESPQ_OVERFLOW) {
-		sge->stats.respQ_overflow++;
-		pr_alert("%s: SGE response queue overflow\n",
-			 adapter->name);
-	}
-	if (cause & F_FL_EXHAUSTED) {
-		sge->stats.freelistQ_empty++;
-		freelQs_empty(sge);
-	}
-	if (cause & F_PACKET_TOO_BIG) {
-		sge->stats.pkt_too_big++;
-		pr_alert("%s: SGE max packet size exceeded\n",
-			 adapter->name);
-	}
-	if (cause & F_PACKET_MISMATCH) {
-		sge->stats.pkt_mismatch++;
-		pr_alert("%s: SGE packet mismatch\n", adapter->name);
-	}
-	if (cause & SGE_INT_FATAL)
-		t1_fatal_err(adapter);
-
-	writel(cause, adapter->regs + A_SG_INT_CAUSE);
-	return 0;
-}
-
-const struct sge_intr_counts *t1_sge_get_intr_counts(const struct sge *sge)
-{
-	return &sge->stats;
-}
-
-void t1_sge_get_port_stats(const struct sge *sge, int port,
-			   struct sge_port_stats *ss)
-{
-	int cpu;
-
-	memset(ss, 0, sizeof(*ss));
-	for_each_possible_cpu(cpu) {
-		struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[port], cpu);
-
-		ss->rx_cso_good += st->rx_cso_good;
-		ss->tx_cso += st->tx_cso;
-		ss->tx_tso += st->tx_tso;
-		ss->tx_need_hdrroom += st->tx_need_hdrroom;
-		ss->vlan_xtract += st->vlan_xtract;
-		ss->vlan_insert += st->vlan_insert;
-	}
-}
-
-/**
- *	recycle_fl_buf - recycle a free list buffer
- *	@fl: the free list
- *	@idx: index of buffer to recycle
- *
- *	Recycles the specified buffer on the given free list by adding it at
- *	the next available slot on the list.
- */
-static void recycle_fl_buf(struct freelQ *fl, int idx)
-{
-	struct freelQ_e *from = &fl->entries[idx];
-	struct freelQ_e *to = &fl->entries[fl->pidx];
-
-	fl->centries[fl->pidx] = fl->centries[idx];
-	to->addr_lo = from->addr_lo;
-	to->addr_hi = from->addr_hi;
-	to->len_gen = G_CMD_LEN(from->len_gen) | V_CMD_GEN1(fl->genbit);
-	wmb();
-	to->gen2 = V_CMD_GEN2(fl->genbit);
-	fl->credits++;
-
-	if (++fl->pidx == fl->size) {
-		fl->pidx = 0;
-		fl->genbit ^= 1;
-	}
-}
-
-static int copybreak __read_mostly = 256;
-module_param(copybreak, int, 0);
-MODULE_PARM_DESC(copybreak, "Receive copy threshold");
-
-/**
- *	get_packet - return the next ingress packet buffer
- *	@pdev: the PCI device that received the packet
- *	@fl: the SGE free list holding the packet
- *	@len: the actual packet length, excluding any SGE padding
- *
- *	Get the next packet from a free list and complete setup of the
- *	sk_buff.  If the packet is small we make a copy and recycle the
- *	original buffer, otherwise we use the original buffer itself.  If a
- *	positive drop threshold is supplied packets are dropped and their
- *	buffers recycled if (a) the number of remaining buffers is under the
- *	threshold and the packet is too big to copy, or (b) the packet should
- *	be copied but there is no memory for the copy.
- */
-static inline struct sk_buff *get_packet(struct pci_dev *pdev,
-					 struct freelQ *fl, unsigned int len)
-{
-	struct sk_buff *skb;
-	const struct freelQ_ce *ce = &fl->centries[fl->cidx];
-
-	if (len < copybreak) {
-		skb = alloc_skb(len + 2, GFP_ATOMIC);
-		if (!skb)
-			goto use_orig_buf;
-
-		skb_reserve(skb, 2);	/* align IP header */
-		skb_put(skb, len);
-		pci_dma_sync_single_for_cpu(pdev,
-					    dma_unmap_addr(ce, dma_addr),
-					    dma_unmap_len(ce, dma_len),
-					    PCI_DMA_FROMDEVICE);
-		skb_copy_from_linear_data(ce->skb, skb->data, len);
-		pci_dma_sync_single_for_device(pdev,
-					       dma_unmap_addr(ce, dma_addr),
-					       dma_unmap_len(ce, dma_len),
-					       PCI_DMA_FROMDEVICE);
-		recycle_fl_buf(fl, fl->cidx);
-		return skb;
-	}
-
-use_orig_buf:
-	if (fl->credits < 2) {
-		recycle_fl_buf(fl, fl->cidx);
-		return NULL;
-	}
-
-	pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr),
-			 dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE);
-	skb = ce->skb;
-	prefetch(skb->data);
-
-	skb_put(skb, len);
-	return skb;
-}
-
-/**
- *	unexpected_offload - handle an unexpected offload packet
- *	@adapter: the adapter
- *	@fl: the free list that received the packet
- *
- *	Called when we receive an unexpected offload packet (e.g., the TOE
- *	function is disabled or the card is a NIC).  Prints a message and
- *	recycles the buffer.
- */
-static void unexpected_offload(struct adapter *adapter, struct freelQ *fl)
-{
-	struct freelQ_ce *ce = &fl->centries[fl->cidx];
-	struct sk_buff *skb = ce->skb;
-
-	pci_dma_sync_single_for_cpu(adapter->pdev, dma_unmap_addr(ce, dma_addr),
-			    dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE);
-	pr_err("%s: unexpected offload packet, cmd %u\n",
-	       adapter->name, *skb->data);
-	recycle_fl_buf(fl, fl->cidx);
-}
-
-/*
- * T1/T2 SGE limits the maximum DMA size per TX descriptor to
- * SGE_TX_DESC_MAX_PLEN (16KB). If the PAGE_SIZE is larger than 16KB, the
- * stack might send more than SGE_TX_DESC_MAX_PLEN in a contiguous manner.
- * Note that the *_large_page_tx_descs stuff will be optimized out when
- * PAGE_SIZE <= SGE_TX_DESC_MAX_PLEN.
- *
- * compute_large_page_descs() computes how many additional descriptors are
- * required to break down the stack's request.
- */
-static inline unsigned int compute_large_page_tx_descs(struct sk_buff *skb)
-{
-	unsigned int count = 0;
-
-	if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) {
-		unsigned int nfrags = skb_shinfo(skb)->nr_frags;
-		unsigned int i, len = skb_headlen(skb);
-		while (len > SGE_TX_DESC_MAX_PLEN) {
-			count++;
-			len -= SGE_TX_DESC_MAX_PLEN;
-		}
-		for (i = 0; nfrags--; i++) {
-			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-			len = frag->size;
-			while (len > SGE_TX_DESC_MAX_PLEN) {
-				count++;
-				len -= SGE_TX_DESC_MAX_PLEN;
-			}
-		}
-	}
-	return count;
-}
-
-/*
- * Write a cmdQ entry.
- *
- * Since this function writes the 'flags' field, it must not be used to
- * write the first cmdQ entry.
- */
-static inline void write_tx_desc(struct cmdQ_e *e, dma_addr_t mapping,
-				 unsigned int len, unsigned int gen,
-				 unsigned int eop)
-{
-	BUG_ON(len > SGE_TX_DESC_MAX_PLEN);
-
-	e->addr_lo = (u32)mapping;
-	e->addr_hi = (u64)mapping >> 32;
-	e->len_gen = V_CMD_LEN(len) | V_CMD_GEN1(gen);
-	e->flags = F_CMD_DATAVALID | V_CMD_EOP(eop) | V_CMD_GEN2(gen);
-}
-
-/*
- * See comment for previous function.
- *
- * write_tx_descs_large_page() writes additional SGE tx descriptors if
- * *desc_len exceeds HW's capability.
- */
-static inline unsigned int write_large_page_tx_descs(unsigned int pidx,
-						     struct cmdQ_e **e,
-						     struct cmdQ_ce **ce,
-						     unsigned int *gen,
-						     dma_addr_t *desc_mapping,
-						     unsigned int *desc_len,
-						     unsigned int nfrags,
-						     struct cmdQ *q)
-{
-	if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) {
-		struct cmdQ_e *e1 = *e;
-		struct cmdQ_ce *ce1 = *ce;
-
-		while (*desc_len > SGE_TX_DESC_MAX_PLEN) {
-			*desc_len -= SGE_TX_DESC_MAX_PLEN;
-			write_tx_desc(e1, *desc_mapping, SGE_TX_DESC_MAX_PLEN,
-				      *gen, nfrags == 0 && *desc_len == 0);
-			ce1->skb = NULL;
-			dma_unmap_len_set(ce1, dma_len, 0);
-			*desc_mapping += SGE_TX_DESC_MAX_PLEN;
-			if (*desc_len) {
-				ce1++;
-				e1++;
-				if (++pidx == q->size) {
-					pidx = 0;
-					*gen ^= 1;
-					ce1 = q->centries;
-					e1 = q->entries;
-				}
-			}
-		}
-		*e = e1;
-		*ce = ce1;
-	}
-	return pidx;
-}
-
-/*
- * Write the command descriptors to transmit the given skb starting at
- * descriptor pidx with the given generation.
- */
-static inline void write_tx_descs(struct adapter *adapter, struct sk_buff *skb,
-				  unsigned int pidx, unsigned int gen,
-				  struct cmdQ *q)
-{
-	dma_addr_t mapping, desc_mapping;
-	struct cmdQ_e *e, *e1;
-	struct cmdQ_ce *ce;
-	unsigned int i, flags, first_desc_len, desc_len,
-	    nfrags = skb_shinfo(skb)->nr_frags;
-
-	e = e1 = &q->entries[pidx];
-	ce = &q->centries[pidx];
-
-	mapping = pci_map_single(adapter->pdev, skb->data,
-				 skb_headlen(skb), PCI_DMA_TODEVICE);
-
-	desc_mapping = mapping;
-	desc_len = skb_headlen(skb);
-
-	flags = F_CMD_DATAVALID | F_CMD_SOP |
-	    V_CMD_EOP(nfrags == 0 && desc_len <= SGE_TX_DESC_MAX_PLEN) |
-	    V_CMD_GEN2(gen);
-	first_desc_len = (desc_len <= SGE_TX_DESC_MAX_PLEN) ?
-	    desc_len : SGE_TX_DESC_MAX_PLEN;
-	e->addr_lo = (u32)desc_mapping;
-	e->addr_hi = (u64)desc_mapping >> 32;
-	e->len_gen = V_CMD_LEN(first_desc_len) | V_CMD_GEN1(gen);
-	ce->skb = NULL;
-	dma_unmap_len_set(ce, dma_len, 0);
-
-	if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN &&
-	    desc_len > SGE_TX_DESC_MAX_PLEN) {
-		desc_mapping += first_desc_len;
-		desc_len -= first_desc_len;
-		e1++;
-		ce++;
-		if (++pidx == q->size) {
-			pidx = 0;
-			gen ^= 1;
-			e1 = q->entries;
-			ce = q->centries;
-		}
-		pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen,
-						 &desc_mapping, &desc_len,
-						 nfrags, q);
-
-		if (likely(desc_len))
-			write_tx_desc(e1, desc_mapping, desc_len, gen,
-				      nfrags == 0);
-	}
-
-	ce->skb = NULL;
-	dma_unmap_addr_set(ce, dma_addr, mapping);
-	dma_unmap_len_set(ce, dma_len, skb_headlen(skb));
-
-	for (i = 0; nfrags--; i++) {
-		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
-		e1++;
-		ce++;
-		if (++pidx == q->size) {
-			pidx = 0;
-			gen ^= 1;
-			e1 = q->entries;
-			ce = q->centries;
-		}
-
-		mapping = pci_map_page(adapter->pdev, frag->page,
-				       frag->page_offset, frag->size,
-				       PCI_DMA_TODEVICE);
-		desc_mapping = mapping;
-		desc_len = frag->size;
-
-		pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen,
-						 &desc_mapping, &desc_len,
-						 nfrags, q);
-		if (likely(desc_len))
-			write_tx_desc(e1, desc_mapping, desc_len, gen,
-				      nfrags == 0);
-		ce->skb = NULL;
-		dma_unmap_addr_set(ce, dma_addr, mapping);
-		dma_unmap_len_set(ce, dma_len, frag->size);
-	}
-	ce->skb = skb;
-	wmb();
-	e->flags = flags;
-}
-
-/*
- * Clean up completed Tx buffers.
- */
-static inline void reclaim_completed_tx(struct sge *sge, struct cmdQ *q)
-{
-	unsigned int reclaim = q->processed - q->cleaned;
-
-	if (reclaim) {
-		pr_debug("reclaim_completed_tx processed:%d cleaned:%d\n",
-			 q->processed, q->cleaned);
-		free_cmdQ_buffers(sge, q, reclaim);
-		q->cleaned += reclaim;
-	}
-}
-
-/*
- * Called from tasklet. Checks the scheduler for any
- * pending skbs that can be sent.
- */
-static void restart_sched(unsigned long arg)
-{
-	struct sge *sge = (struct sge *) arg;
-	struct adapter *adapter = sge->adapter;
-	struct cmdQ *q = &sge->cmdQ[0];
-	struct sk_buff *skb;
-	unsigned int credits, queued_skb = 0;
-
-	spin_lock(&q->lock);
-	reclaim_completed_tx(sge, q);
-
-	credits = q->size - q->in_use;
-	pr_debug("restart_sched credits=%d\n", credits);
-	while ((skb = sched_skb(sge, NULL, credits)) != NULL) {
-		unsigned int genbit, pidx, count;
-	        count = 1 + skb_shinfo(skb)->nr_frags;
-		count += compute_large_page_tx_descs(skb);
-		q->in_use += count;
-		genbit = q->genbit;
-		pidx = q->pidx;
-		q->pidx += count;
-		if (q->pidx >= q->size) {
-			q->pidx -= q->size;
-			q->genbit ^= 1;
-		}
-		write_tx_descs(adapter, skb, pidx, genbit, q);
-	        credits = q->size - q->in_use;
-		queued_skb = 1;
-	}
-
-	if (queued_skb) {
-		clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-		if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) {
-			set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-			writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL);
-		}
-	}
-	spin_unlock(&q->lock);
-}
-
-/**
- *	sge_rx - process an ingress ethernet packet
- *	@sge: the sge structure
- *	@fl: the free list that contains the packet buffer
- *	@len: the packet length
- *
- *	Process an ingress ethernet pakcet and deliver it to the stack.
- */
-static void sge_rx(struct sge *sge, struct freelQ *fl, unsigned int len)
-{
-	struct sk_buff *skb;
-	const struct cpl_rx_pkt *p;
-	struct adapter *adapter = sge->adapter;
-	struct sge_port_stats *st;
-	struct net_device *dev;
-
-	skb = get_packet(adapter->pdev, fl, len - sge->rx_pkt_pad);
-	if (unlikely(!skb)) {
-		sge->stats.rx_drops++;
-		return;
-	}
-
-	p = (const struct cpl_rx_pkt *) skb->data;
-	if (p->iff >= adapter->params.nports) {
-		kfree_skb(skb);
-		return;
-	}
-	__skb_pull(skb, sizeof(*p));
-
-	st = this_cpu_ptr(sge->port_stats[p->iff]);
-	dev = adapter->port[p->iff].dev;
-
-	skb->protocol = eth_type_trans(skb, dev);
-	if ((dev->features & NETIF_F_RXCSUM) && p->csum == 0xffff &&
-	    skb->protocol == htons(ETH_P_IP) &&
-	    (skb->data[9] == IPPROTO_TCP || skb->data[9] == IPPROTO_UDP)) {
-		++st->rx_cso_good;
-		skb->ip_summed = CHECKSUM_UNNECESSARY;
-	} else
-		skb_checksum_none_assert(skb);
-
-	if (p->vlan_valid) {
-		st->vlan_xtract++;
-		__vlan_hwaccel_put_tag(skb, ntohs(p->vlan));
-	}
-	netif_receive_skb(skb);
-}
-
-/*
- * Returns true if a command queue has enough available descriptors that
- * we can resume Tx operation after temporarily disabling its packet queue.
- */
-static inline int enough_free_Tx_descs(const struct cmdQ *q)
-{
-	unsigned int r = q->processed - q->cleaned;
-
-	return q->in_use - r < (q->size >> 1);
-}
-
-/*
- * Called when sufficient space has become available in the SGE command queues
- * after the Tx packet schedulers have been suspended to restart the Tx path.
- */
-static void restart_tx_queues(struct sge *sge)
-{
-	struct adapter *adap = sge->adapter;
-	int i;
-
-	if (!enough_free_Tx_descs(&sge->cmdQ[0]))
-		return;
-
-	for_each_port(adap, i) {
-		struct net_device *nd = adap->port[i].dev;
-
-		if (test_and_clear_bit(nd->if_port, &sge->stopped_tx_queues) &&
-		    netif_running(nd)) {
-			sge->stats.cmdQ_restarted[2]++;
-			netif_wake_queue(nd);
-		}
-	}
-}
-
-/*
- * update_tx_info is called from the interrupt handler/NAPI to return cmdQ0
- * information.
- */
-static unsigned int update_tx_info(struct adapter *adapter,
-					  unsigned int flags,
-					  unsigned int pr0)
-{
-	struct sge *sge = adapter->sge;
-	struct cmdQ *cmdq = &sge->cmdQ[0];
-
-	cmdq->processed += pr0;
-	if (flags & (F_FL0_ENABLE | F_FL1_ENABLE)) {
-		freelQs_empty(sge);
-		flags &= ~(F_FL0_ENABLE | F_FL1_ENABLE);
-	}
-	if (flags & F_CMDQ0_ENABLE) {
-		clear_bit(CMDQ_STAT_RUNNING, &cmdq->status);
-
-		if (cmdq->cleaned + cmdq->in_use != cmdq->processed &&
-		    !test_and_set_bit(CMDQ_STAT_LAST_PKT_DB, &cmdq->status)) {
-			set_bit(CMDQ_STAT_RUNNING, &cmdq->status);
-			writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL);
-		}
-		if (sge->tx_sched)
-			tasklet_hi_schedule(&sge->tx_sched->sched_tsk);
-
-		flags &= ~F_CMDQ0_ENABLE;
-	}
-
-	if (unlikely(sge->stopped_tx_queues != 0))
-		restart_tx_queues(sge);
-
-	return flags;
-}
-
-/*
- * Process SGE responses, up to the supplied budget.  Returns the number of
- * responses processed.  A negative budget is effectively unlimited.
- */
-static int process_responses(struct adapter *adapter, int budget)
-{
-	struct sge *sge = adapter->sge;
-	struct respQ *q = &sge->respQ;
-	struct respQ_e *e = &q->entries[q->cidx];
-	int done = 0;
-	unsigned int flags = 0;
-	unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0};
-
-	while (done < budget && e->GenerationBit == q->genbit) {
-		flags |= e->Qsleeping;
-
-		cmdq_processed[0] += e->Cmdq0CreditReturn;
-		cmdq_processed[1] += e->Cmdq1CreditReturn;
-
-		/* We batch updates to the TX side to avoid cacheline
-		 * ping-pong of TX state information on MP where the sender
-		 * might run on a different CPU than this function...
-		 */
-		if (unlikely((flags & F_CMDQ0_ENABLE) || cmdq_processed[0] > 64)) {
-			flags = update_tx_info(adapter, flags, cmdq_processed[0]);
-			cmdq_processed[0] = 0;
-		}
-
-		if (unlikely(cmdq_processed[1] > 16)) {
-			sge->cmdQ[1].processed += cmdq_processed[1];
-			cmdq_processed[1] = 0;
-		}
-
-		if (likely(e->DataValid)) {
-			struct freelQ *fl = &sge->freelQ[e->FreelistQid];
-
-			BUG_ON(!e->Sop || !e->Eop);
-			if (unlikely(e->Offload))
-				unexpected_offload(adapter, fl);
-			else
-				sge_rx(sge, fl, e->BufferLength);
-
-			++done;
-
-			/*
-			 * Note: this depends on each packet consuming a
-			 * single free-list buffer; cf. the BUG above.
-			 */
-			if (++fl->cidx == fl->size)
-				fl->cidx = 0;
-			prefetch(fl->centries[fl->cidx].skb);
-
-			if (unlikely(--fl->credits <
-				     fl->size - SGE_FREEL_REFILL_THRESH))
-				refill_free_list(sge, fl);
-		} else
-			sge->stats.pure_rsps++;
-
-		e++;
-		if (unlikely(++q->cidx == q->size)) {
-			q->cidx = 0;
-			q->genbit ^= 1;
-			e = q->entries;
-		}
-		prefetch(e);
-
-		if (++q->credits > SGE_RESPQ_REPLENISH_THRES) {
-			writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT);
-			q->credits = 0;
-		}
-	}
-
-	flags = update_tx_info(adapter, flags, cmdq_processed[0]);
-	sge->cmdQ[1].processed += cmdq_processed[1];
-
-	return done;
-}
-
-static inline int responses_pending(const struct adapter *adapter)
-{
-	const struct respQ *Q = &adapter->sge->respQ;
-	const struct respQ_e *e = &Q->entries[Q->cidx];
-
-	return e->GenerationBit == Q->genbit;
-}
-
-/*
- * A simpler version of process_responses() that handles only pure (i.e.,
- * non data-carrying) responses.  Such respones are too light-weight to justify
- * calling a softirq when using NAPI, so we handle them specially in hard
- * interrupt context.  The function is called with a pointer to a response,
- * which the caller must ensure is a valid pure response.  Returns 1 if it
- * encounters a valid data-carrying response, 0 otherwise.
- */
-static int process_pure_responses(struct adapter *adapter)
-{
-	struct sge *sge = adapter->sge;
-	struct respQ *q = &sge->respQ;
-	struct respQ_e *e = &q->entries[q->cidx];
-	const struct freelQ *fl = &sge->freelQ[e->FreelistQid];
-	unsigned int flags = 0;
-	unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0};
-
-	prefetch(fl->centries[fl->cidx].skb);
-	if (e->DataValid)
-		return 1;
-
-	do {
-		flags |= e->Qsleeping;
-
-		cmdq_processed[0] += e->Cmdq0CreditReturn;
-		cmdq_processed[1] += e->Cmdq1CreditReturn;
-
-		e++;
-		if (unlikely(++q->cidx == q->size)) {
-			q->cidx = 0;
-			q->genbit ^= 1;
-			e = q->entries;
-		}
-		prefetch(e);
-
-		if (++q->credits > SGE_RESPQ_REPLENISH_THRES) {
-			writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT);
-			q->credits = 0;
-		}
-		sge->stats.pure_rsps++;
-	} while (e->GenerationBit == q->genbit && !e->DataValid);
-
-	flags = update_tx_info(adapter, flags, cmdq_processed[0]);
-	sge->cmdQ[1].processed += cmdq_processed[1];
-
-	return e->GenerationBit == q->genbit;
-}
-
-/*
- * Handler for new data events when using NAPI.  This does not need any locking
- * or protection from interrupts as data interrupts are off at this point and
- * other adapter interrupts do not interfere.
- */
-int t1_poll(struct napi_struct *napi, int budget)
-{
-	struct adapter *adapter = container_of(napi, struct adapter, napi);
-	int work_done = process_responses(adapter, budget);
-
-	if (likely(work_done < budget)) {
-		napi_complete(napi);
-		writel(adapter->sge->respQ.cidx,
-		       adapter->regs + A_SG_SLEEPING);
-	}
-	return work_done;
-}
-
-irqreturn_t t1_interrupt(int irq, void *data)
-{
-	struct adapter *adapter = data;
-	struct sge *sge = adapter->sge;
-	int handled;
-
-	if (likely(responses_pending(adapter))) {
-		writel(F_PL_INTR_SGE_DATA, adapter->regs + A_PL_CAUSE);
-
-		if (napi_schedule_prep(&adapter->napi)) {
-			if (process_pure_responses(adapter))
-				__napi_schedule(&adapter->napi);
-			else {
-				/* no data, no NAPI needed */
-				writel(sge->respQ.cidx, adapter->regs + A_SG_SLEEPING);
-				/* undo schedule_prep */
-				napi_enable(&adapter->napi);
-			}
-		}
-		return IRQ_HANDLED;
-	}
-
-	spin_lock(&adapter->async_lock);
-	handled = t1_slow_intr_handler(adapter);
-	spin_unlock(&adapter->async_lock);
-
-	if (!handled)
-		sge->stats.unhandled_irqs++;
-
-	return IRQ_RETVAL(handled != 0);
-}
-
-/*
- * Enqueues the sk_buff onto the cmdQ[qid] and has hardware fetch it.
- *
- * The code figures out how many entries the sk_buff will require in the
- * cmdQ and updates the cmdQ data structure with the state once the enqueue
- * has complete. Then, it doesn't access the global structure anymore, but
- * uses the corresponding fields on the stack. In conjunction with a spinlock
- * around that code, we can make the function reentrant without holding the
- * lock when we actually enqueue (which might be expensive, especially on
- * architectures with IO MMUs).
- *
- * This runs with softirqs disabled.
- */
-static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter,
-		     unsigned int qid, struct net_device *dev)
-{
-	struct sge *sge = adapter->sge;
-	struct cmdQ *q = &sge->cmdQ[qid];
-	unsigned int credits, pidx, genbit, count, use_sched_skb = 0;
-
-	if (!spin_trylock(&q->lock))
-		return NETDEV_TX_LOCKED;
-
-	reclaim_completed_tx(sge, q);
-
-	pidx = q->pidx;
-	credits = q->size - q->in_use;
-	count = 1 + skb_shinfo(skb)->nr_frags;
-	count += compute_large_page_tx_descs(skb);
-
-	/* Ethernet packet */
-	if (unlikely(credits < count)) {
-		if (!netif_queue_stopped(dev)) {
-			netif_stop_queue(dev);
-			set_bit(dev->if_port, &sge->stopped_tx_queues);
-			sge->stats.cmdQ_full[2]++;
-			pr_err("%s: Tx ring full while queue awake!\n",
-			       adapter->name);
-		}
-		spin_unlock(&q->lock);
-		return NETDEV_TX_BUSY;
-	}
-
-	if (unlikely(credits - count < q->stop_thres)) {
-		netif_stop_queue(dev);
-		set_bit(dev->if_port, &sge->stopped_tx_queues);
-		sge->stats.cmdQ_full[2]++;
-	}
-
-	/* T204 cmdQ0 skbs that are destined for a certain port have to go
-	 * through the scheduler.
-	 */
-	if (sge->tx_sched && !qid && skb->dev) {
-use_sched:
-		use_sched_skb = 1;
-		/* Note that the scheduler might return a different skb than
-		 * the one passed in.
-		 */
-		skb = sched_skb(sge, skb, credits);
-		if (!skb) {
-			spin_unlock(&q->lock);
-			return NETDEV_TX_OK;
-		}
-		pidx = q->pidx;
-		count = 1 + skb_shinfo(skb)->nr_frags;
-		count += compute_large_page_tx_descs(skb);
-	}
-
-	q->in_use += count;
-	genbit = q->genbit;
-	pidx = q->pidx;
-	q->pidx += count;
-	if (q->pidx >= q->size) {
-		q->pidx -= q->size;
-		q->genbit ^= 1;
-	}
-	spin_unlock(&q->lock);
-
-	write_tx_descs(adapter, skb, pidx, genbit, q);
-
-	/*
-	 * We always ring the doorbell for cmdQ1.  For cmdQ0, we only ring
-	 * the doorbell if the Q is asleep. There is a natural race, where
-	 * the hardware is going to sleep just after we checked, however,
-	 * then the interrupt handler will detect the outstanding TX packet
-	 * and ring the doorbell for us.
-	 */
-	if (qid)
-		doorbell_pio(adapter, F_CMDQ1_ENABLE);
-	else {
-		clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-		if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) {
-			set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status);
-			writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL);
-		}
-	}
-
-	if (use_sched_skb) {
-		if (spin_trylock(&q->lock)) {
-			credits = q->size - q->in_use;
-			skb = NULL;
-			goto use_sched;
-		}
-	}
-	return NETDEV_TX_OK;
-}
-
-#define MK_ETH_TYPE_MSS(type, mss) (((mss) & 0x3FFF) | ((type) << 14))
-
-/*
- *	eth_hdr_len - return the length of an Ethernet header
- *	@data: pointer to the start of the Ethernet header
- *
- *	Returns the length of an Ethernet header, including optional VLAN tag.
- */
-static inline int eth_hdr_len(const void *data)
-{
-	const struct ethhdr *e = data;
-
-	return e->h_proto == htons(ETH_P_8021Q) ? VLAN_ETH_HLEN : ETH_HLEN;
-}
-
-/*
- * Adds the CPL header to the sk_buff and passes it to t1_sge_tx.
- */
-netdev_tx_t t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct adapter *adapter = dev->ml_priv;
-	struct sge *sge = adapter->sge;
-	struct sge_port_stats *st = this_cpu_ptr(sge->port_stats[dev->if_port]);
-	struct cpl_tx_pkt *cpl;
-	struct sk_buff *orig_skb = skb;
-	int ret;
-
-	if (skb->protocol == htons(ETH_P_CPL5))
-		goto send;
-
-	/*
-	 * We are using a non-standard hard_header_len.
-	 * Allocate more header room in the rare cases it is not big enough.
-	 */
-	if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) {
-		skb = skb_realloc_headroom(skb, sizeof(struct cpl_tx_pkt_lso));
-		++st->tx_need_hdrroom;
-		dev_kfree_skb_any(orig_skb);
-		if (!skb)
-			return NETDEV_TX_OK;
-	}
-
-	if (skb_shinfo(skb)->gso_size) {
-		int eth_type;
-		struct cpl_tx_pkt_lso *hdr;
-
-		++st->tx_tso;
-
-		eth_type = skb_network_offset(skb) == ETH_HLEN ?
-			CPL_ETH_II : CPL_ETH_II_VLAN;
-
-		hdr = (struct cpl_tx_pkt_lso *)skb_push(skb, sizeof(*hdr));
-		hdr->opcode = CPL_TX_PKT_LSO;
-		hdr->ip_csum_dis = hdr->l4_csum_dis = 0;
-		hdr->ip_hdr_words = ip_hdr(skb)->ihl;
-		hdr->tcp_hdr_words = tcp_hdr(skb)->doff;
-		hdr->eth_type_mss = htons(MK_ETH_TYPE_MSS(eth_type,
-							  skb_shinfo(skb)->gso_size));
-		hdr->len = htonl(skb->len - sizeof(*hdr));
-		cpl = (struct cpl_tx_pkt *)hdr;
-	} else {
-		/*
-		 * Packets shorter than ETH_HLEN can break the MAC, drop them
-		 * early.  Also, we may get oversized packets because some
-		 * parts of the kernel don't handle our unusual hard_header_len
-		 * right, drop those too.
-		 */
-		if (unlikely(skb->len < ETH_HLEN ||
-			     skb->len > dev->mtu + eth_hdr_len(skb->data))) {
-			pr_debug("%s: packet size %d hdr %d mtu%d\n", dev->name,
-				 skb->len, eth_hdr_len(skb->data), dev->mtu);
-			dev_kfree_skb_any(skb);
-			return NETDEV_TX_OK;
-		}
-
-		if (skb->ip_summed == CHECKSUM_PARTIAL &&
-		    ip_hdr(skb)->protocol == IPPROTO_UDP) {
-			if (unlikely(skb_checksum_help(skb))) {
-				pr_debug("%s: unable to do udp checksum\n", dev->name);
-				dev_kfree_skb_any(skb);
-				return NETDEV_TX_OK;
-			}
-		}
-
-		/* Hmmm, assuming to catch the gratious arp... and we'll use
-		 * it to flush out stuck espi packets...
-		 */
-		if ((unlikely(!adapter->sge->espibug_skb[dev->if_port]))) {
-			if (skb->protocol == htons(ETH_P_ARP) &&
-			    arp_hdr(skb)->ar_op == htons(ARPOP_REQUEST)) {
-				adapter->sge->espibug_skb[dev->if_port] = skb;
-				/* We want to re-use this skb later. We
-				 * simply bump the reference count and it
-				 * will not be freed...
-				 */
-				skb = skb_get(skb);
-			}
-		}
-
-		cpl = (struct cpl_tx_pkt *)__skb_push(skb, sizeof(*cpl));
-		cpl->opcode = CPL_TX_PKT;
-		cpl->ip_csum_dis = 1;    /* SW calculates IP csum */
-		cpl->l4_csum_dis = skb->ip_summed == CHECKSUM_PARTIAL ? 0 : 1;
-		/* the length field isn't used so don't bother setting it */
-
-		st->tx_cso += (skb->ip_summed == CHECKSUM_PARTIAL);
-	}
-	cpl->iff = dev->if_port;
-
-	if (vlan_tx_tag_present(skb)) {
-		cpl->vlan_valid = 1;
-		cpl->vlan = htons(vlan_tx_tag_get(skb));
-		st->vlan_insert++;
-	} else
-		cpl->vlan_valid = 0;
-
-send:
-	ret = t1_sge_tx(skb, adapter, 0, dev);
-
-	/* If transmit busy, and we reallocated skb's due to headroom limit,
-	 * then silently discard to avoid leak.
-	 */
-	if (unlikely(ret != NETDEV_TX_OK && skb != orig_skb)) {
-		dev_kfree_skb_any(skb);
-		ret = NETDEV_TX_OK;
-	}
-	return ret;
-}
-
-/*
- * Callback for the Tx buffer reclaim timer.  Runs with softirqs disabled.
- */
-static void sge_tx_reclaim_cb(unsigned long data)
-{
-	int i;
-	struct sge *sge = (struct sge *)data;
-
-	for (i = 0; i < SGE_CMDQ_N; ++i) {
-		struct cmdQ *q = &sge->cmdQ[i];
-
-		if (!spin_trylock(&q->lock))
-			continue;
-
-		reclaim_completed_tx(sge, q);
-		if (i == 0 && q->in_use) {    /* flush pending credits */
-			writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL);
-		}
-		spin_unlock(&q->lock);
-	}
-	mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
-}
-
-/*
- * Propagate changes of the SGE coalescing parameters to the HW.
- */
-int t1_sge_set_coalesce_params(struct sge *sge, struct sge_params *p)
-{
-	sge->fixed_intrtimer = p->rx_coalesce_usecs *
-		core_ticks_per_usec(sge->adapter);
-	writel(sge->fixed_intrtimer, sge->adapter->regs + A_SG_INTRTIMER);
-	return 0;
-}
-
-/*
- * Allocates both RX and TX resources and configures the SGE. However,
- * the hardware is not enabled yet.
- */
-int t1_sge_configure(struct sge *sge, struct sge_params *p)
-{
-	if (alloc_rx_resources(sge, p))
-		return -ENOMEM;
-	if (alloc_tx_resources(sge, p)) {
-		free_rx_resources(sge);
-		return -ENOMEM;
-	}
-	configure_sge(sge, p);
-
-	/*
-	 * Now that we have sized the free lists calculate the payload
-	 * capacity of the large buffers.  Other parts of the driver use
-	 * this to set the max offload coalescing size so that RX packets
-	 * do not overflow our large buffers.
-	 */
-	p->large_buf_capacity = jumbo_payload_capacity(sge);
-	return 0;
-}
-
-/*
- * Disables the DMA engine.
- */
-void t1_sge_stop(struct sge *sge)
-{
-	int i;
-	writel(0, sge->adapter->regs + A_SG_CONTROL);
-	readl(sge->adapter->regs + A_SG_CONTROL); /* flush */
-
-	if (is_T2(sge->adapter))
-		del_timer_sync(&sge->espibug_timer);
-
-	del_timer_sync(&sge->tx_reclaim_timer);
-	if (sge->tx_sched)
-		tx_sched_stop(sge);
-
-	for (i = 0; i < MAX_NPORTS; i++)
-		kfree_skb(sge->espibug_skb[i]);
-}
-
-/*
- * Enables the DMA engine.
- */
-void t1_sge_start(struct sge *sge)
-{
-	refill_free_list(sge, &sge->freelQ[0]);
-	refill_free_list(sge, &sge->freelQ[1]);
-
-	writel(sge->sge_control, sge->adapter->regs + A_SG_CONTROL);
-	doorbell_pio(sge->adapter, F_FL0_ENABLE | F_FL1_ENABLE);
-	readl(sge->adapter->regs + A_SG_CONTROL); /* flush */
-
-	mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD);
-
-	if (is_T2(sge->adapter))
-		mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout);
-}
-
-/*
- * Callback for the T2 ESPI 'stuck packet feature' workaorund
- */
-static void espibug_workaround_t204(unsigned long data)
-{
-	struct adapter *adapter = (struct adapter *)data;
-	struct sge *sge = adapter->sge;
-	unsigned int nports = adapter->params.nports;
-	u32 seop[MAX_NPORTS];
-
-	if (adapter->open_device_map & PORT_MASK) {
-		int i;
-
-		if (t1_espi_get_mon_t204(adapter, &(seop[0]), 0) < 0)
-			return;
-
-		for (i = 0; i < nports; i++) {
-			struct sk_buff *skb = sge->espibug_skb[i];
-
-			if (!netif_running(adapter->port[i].dev) ||
-			    netif_queue_stopped(adapter->port[i].dev) ||
-			    !seop[i] || ((seop[i] & 0xfff) != 0) || !skb)
-				continue;
-
-			if (!skb->cb[0]) {
-				skb_copy_to_linear_data_offset(skb,
-						    sizeof(struct cpl_tx_pkt),
-							       ch_mac_addr,
-							       ETH_ALEN);
-				skb_copy_to_linear_data_offset(skb,
-							       skb->len - 10,
-							       ch_mac_addr,
-							       ETH_ALEN);
-				skb->cb[0] = 0xff;
-			}
-
-			/* bump the reference count to avoid freeing of
-			 * the skb once the DMA has completed.
-			 */
-			skb = skb_get(skb);
-			t1_sge_tx(skb, adapter, 0, adapter->port[i].dev);
-		}
-	}
-	mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout);
-}
-
-static void espibug_workaround(unsigned long data)
-{
-	struct adapter *adapter = (struct adapter *)data;
-	struct sge *sge = adapter->sge;
-
-	if (netif_running(adapter->port[0].dev)) {
-	        struct sk_buff *skb = sge->espibug_skb[0];
-	        u32 seop = t1_espi_get_mon(adapter, 0x930, 0);
-
-	        if ((seop & 0xfff0fff) == 0xfff && skb) {
-	                if (!skb->cb[0]) {
-	                        skb_copy_to_linear_data_offset(skb,
-						     sizeof(struct cpl_tx_pkt),
-							       ch_mac_addr,
-							       ETH_ALEN);
-	                        skb_copy_to_linear_data_offset(skb,
-							       skb->len - 10,
-							       ch_mac_addr,
-							       ETH_ALEN);
-	                        skb->cb[0] = 0xff;
-	                }
-
-	                /* bump the reference count to avoid freeing of the
-	                 * skb once the DMA has completed.
-	                 */
-	                skb = skb_get(skb);
-	                t1_sge_tx(skb, adapter, 0, adapter->port[0].dev);
-	        }
-	}
-	mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout);
-}
-
-/*
- * Creates a t1_sge structure and returns suggested resource parameters.
- */
-struct sge * __devinit t1_sge_create(struct adapter *adapter,
-				     struct sge_params *p)
-{
-	struct sge *sge = kzalloc(sizeof(*sge), GFP_KERNEL);
-	int i;
-
-	if (!sge)
-		return NULL;
-
-	sge->adapter = adapter;
-	sge->netdev = adapter->port[0].dev;
-	sge->rx_pkt_pad = t1_is_T1B(adapter) ? 0 : 2;
-	sge->jumbo_fl = t1_is_T1B(adapter) ? 1 : 0;
-
-	for_each_port(adapter, i) {
-		sge->port_stats[i] = alloc_percpu(struct sge_port_stats);
-		if (!sge->port_stats[i])
-			goto nomem_port;
-	}
-
-	init_timer(&sge->tx_reclaim_timer);
-	sge->tx_reclaim_timer.data = (unsigned long)sge;
-	sge->tx_reclaim_timer.function = sge_tx_reclaim_cb;
-
-	if (is_T2(sge->adapter)) {
-		init_timer(&sge->espibug_timer);
-
-		if (adapter->params.nports > 1) {
-			tx_sched_init(sge);
-			sge->espibug_timer.function = espibug_workaround_t204;
-		} else
-			sge->espibug_timer.function = espibug_workaround;
-		sge->espibug_timer.data = (unsigned long)sge->adapter;
-
-		sge->espibug_timeout = 1;
-		/* for T204, every 10ms */
-		if (adapter->params.nports > 1)
-			sge->espibug_timeout = HZ/100;
-	}
-
-
-	p->cmdQ_size[0] = SGE_CMDQ0_E_N;
-	p->cmdQ_size[1] = SGE_CMDQ1_E_N;
-	p->freelQ_size[!sge->jumbo_fl] = SGE_FREEL_SIZE;
-	p->freelQ_size[sge->jumbo_fl] = SGE_JUMBO_FREEL_SIZE;
-	if (sge->tx_sched) {
-		if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204)
-			p->rx_coalesce_usecs = 15;
-		else
-			p->rx_coalesce_usecs = 50;
-	} else
-		p->rx_coalesce_usecs = 50;
-
-	p->coalesce_enable = 0;
-	p->sample_interval_usecs = 0;
-
-	return sge;
-nomem_port:
-	while (i >= 0) {
-		free_percpu(sge->port_stats[i]);
-		--i;
-	}
-	kfree(sge);
-	return NULL;
-
-}