seeq: Move the SEEQ drivers

Move the drivers that use SEEQ chipset into drivers/net/ethernet/seeq
and make the necessary Kconfig and Makefile changes.

CC: Russell King <linux@arm.linux.org.uk>
CC: Hamish Coleman <hamish@zot.apana.org.au>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 858 deletions

diff --git a/drivers/net/sgiseeq.c b/drivers/net/sgiseeq.c
deleted file mode 100644
index 52fb7ed9f36..00000000000
--- a/drivers/net/sgiseeq.c
+++ /dev/null
@@ -1,858 +0,0 @@
-/*
- * sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
- *
- * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
- */
-
-#undef DEBUG
-
-#include <linux/dma-mapping.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/platform_device.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-
-#include <asm/sgi/hpc3.h>
-#include <asm/sgi/ip22.h>
-#include <asm/sgi/seeq.h>
-
-#include "sgiseeq.h"
-
-static char *sgiseeqstr = "SGI Seeq8003";
-
-/*
- * If you want speed, you do something silly, it always has worked for me.  So,
- * with that in mind, I've decided to make this driver look completely like a
- * stupid Lance from a driver architecture perspective.  Only difference is that
- * here our "ring buffer" looks and acts like a real Lance one does but is
- * laid out like how the HPC DMA and the Seeq want it to.  You'd be surprised
- * how a stupid idea like this can pay off in performance, not to mention
- * making this driver 2,000 times easier to write. ;-)
- */
-
-/* Tune these if we tend to run out often etc. */
-#define SEEQ_RX_BUFFERS  16
-#define SEEQ_TX_BUFFERS  16
-
-#define PKT_BUF_SZ       1584
-
-#define NEXT_RX(i)  (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
-#define NEXT_TX(i)  (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
-#define PREV_RX(i)  (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
-#define PREV_TX(i)  (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
-
-#define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
-			    sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
-			    sp->tx_old - sp->tx_new - 1)
-
-#define VIRT_TO_DMA(sp, v) ((sp)->srings_dma +                                 \
-				  (dma_addr_t)((unsigned long)(v) -            \
-					       (unsigned long)((sp)->rx_desc)))
-
-/* Copy frames shorter than rx_copybreak, otherwise pass on up in
- * a full sized sk_buff.  Value of 100 stolen from tulip.c (!alpha).
- */
-static int rx_copybreak = 100;
-
-#define PAD_SIZE    (128 - sizeof(struct hpc_dma_desc) - sizeof(void *))
-
-struct sgiseeq_rx_desc {
-	volatile struct hpc_dma_desc rdma;
-	u8 padding[PAD_SIZE];
-	struct sk_buff *skb;
-};
-
-struct sgiseeq_tx_desc {
-	volatile struct hpc_dma_desc tdma;
-	u8 padding[PAD_SIZE];
-	struct sk_buff *skb;
-};
-
-/*
- * Warning: This structure is laid out in a certain way because HPC dma
- *          descriptors must be 8-byte aligned.  So don't touch this without
- *          some care.
- */
-struct sgiseeq_init_block { /* Note the name ;-) */
-	struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
-	struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
-};
-
-struct sgiseeq_private {
-	struct sgiseeq_init_block *srings;
-	dma_addr_t srings_dma;
-
-	/* Ptrs to the descriptors in uncached space. */
-	struct sgiseeq_rx_desc *rx_desc;
-	struct sgiseeq_tx_desc *tx_desc;
-
-	char *name;
-	struct hpc3_ethregs *hregs;
-	struct sgiseeq_regs *sregs;
-
-	/* Ring entry counters. */
-	unsigned int rx_new, tx_new;
-	unsigned int rx_old, tx_old;
-
-	int is_edlc;
-	unsigned char control;
-	unsigned char mode;
-
-	spinlock_t tx_lock;
-};
-
-static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr)
-{
-	dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
-		       DMA_FROM_DEVICE);
-}
-
-static inline void dma_sync_desc_dev(struct net_device *dev, void *addr)
-{
-	dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
-		       DMA_TO_DEVICE);
-}
-
-static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
-{
-	hregs->reset = HPC3_ERST_CRESET | HPC3_ERST_CLRIRQ;
-	udelay(20);
-	hregs->reset = 0;
-}
-
-static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs,
-				       struct sgiseeq_regs *sregs)
-{
-	hregs->rx_ctrl = hregs->tx_ctrl = 0;
-	hpc3_eth_reset(hregs);
-}
-
-#define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
-		       SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
-
-static inline void seeq_go(struct sgiseeq_private *sp,
-			   struct hpc3_ethregs *hregs,
-			   struct sgiseeq_regs *sregs)
-{
-	sregs->rstat = sp->mode | RSTAT_GO_BITS;
-	hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
-}
-
-static inline void __sgiseeq_set_mac_address(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct sgiseeq_regs *sregs = sp->sregs;
-	int i;
-
-	sregs->tstat = SEEQ_TCMD_RB0;
-	for (i = 0; i < 6; i++)
-		sregs->rw.eth_addr[i] = dev->dev_addr[i];
-}
-
-static int sgiseeq_set_mac_address(struct net_device *dev, void *addr)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct sockaddr *sa = addr;
-
-	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
-
-	spin_lock_irq(&sp->tx_lock);
-	__sgiseeq_set_mac_address(dev);
-	spin_unlock_irq(&sp->tx_lock);
-
-	return 0;
-}
-
-#define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
-#define RCNTCFG_INIT  (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
-#define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
-
-static int seeq_init_ring(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	int i;
-
-	netif_stop_queue(dev);
-	sp->rx_new = sp->tx_new = 0;
-	sp->rx_old = sp->tx_old = 0;
-
-	__sgiseeq_set_mac_address(dev);
-
-	/* Setup tx ring. */
-	for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
-		sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT;
-		dma_sync_desc_dev(dev, &sp->tx_desc[i]);
-	}
-
-	/* And now the rx ring. */
-	for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
-		if (!sp->rx_desc[i].skb) {
-			dma_addr_t dma_addr;
-			struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
-
-			if (skb == NULL)
-				return -ENOMEM;
-			skb_reserve(skb, 2);
-			dma_addr = dma_map_single(dev->dev.parent,
-						  skb->data - 2,
-						  PKT_BUF_SZ, DMA_FROM_DEVICE);
-			sp->rx_desc[i].skb = skb;
-			sp->rx_desc[i].rdma.pbuf = dma_addr;
-		}
-		sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT;
-		dma_sync_desc_dev(dev, &sp->rx_desc[i]);
-	}
-	sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR;
-	dma_sync_desc_dev(dev, &sp->rx_desc[i - 1]);
-	return 0;
-}
-
-static void seeq_purge_ring(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	int i;
-
-	/* clear tx ring. */
-	for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
-		if (sp->tx_desc[i].skb) {
-			dev_kfree_skb(sp->tx_desc[i].skb);
-			sp->tx_desc[i].skb = NULL;
-		}
-	}
-
-	/* And now the rx ring. */
-	for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
-		if (sp->rx_desc[i].skb) {
-			dev_kfree_skb(sp->rx_desc[i].skb);
-			sp->rx_desc[i].skb = NULL;
-		}
-	}
-}
-
-#ifdef DEBUG
-static struct sgiseeq_private *gpriv;
-static struct net_device *gdev;
-
-static void sgiseeq_dump_rings(void)
-{
-	static int once;
-	struct sgiseeq_rx_desc *r = gpriv->rx_desc;
-	struct sgiseeq_tx_desc *t = gpriv->tx_desc;
-	struct hpc3_ethregs *hregs = gpriv->hregs;
-	int i;
-
-	if (once)
-		return;
-	once++;
-	printk("RING DUMP:\n");
-	for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
-		printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
-		       i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
-		       r[i].rdma.pnext);
-		i += 1;
-		printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
-		       i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
-		       r[i].rdma.pnext);
-	}
-	for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
-		printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
-		       i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
-		       t[i].tdma.pnext);
-		i += 1;
-		printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
-		       i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
-		       t[i].tdma.pnext);
-	}
-	printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
-	       gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
-	printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
-	       hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
-	printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
-	       hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
-}
-#endif
-
-#define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
-#define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
-
-static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
-		     struct sgiseeq_regs *sregs)
-{
-	struct hpc3_ethregs *hregs = sp->hregs;
-	int err;
-
-	reset_hpc3_and_seeq(hregs, sregs);
-	err = seeq_init_ring(dev);
-	if (err)
-		return err;
-
-	/* Setup to field the proper interrupt types. */
-	if (sp->is_edlc) {
-		sregs->tstat = TSTAT_INIT_EDLC;
-		sregs->rw.wregs.control = sp->control;
-		sregs->rw.wregs.frame_gap = 0;
-	} else {
-		sregs->tstat = TSTAT_INIT_SEEQ;
-	}
-
-	hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc);
-	hregs->tx_ndptr = VIRT_TO_DMA(sp, sp->tx_desc);
-
-	seeq_go(sp, hregs, sregs);
-	return 0;
-}
-
-static void record_rx_errors(struct net_device *dev, unsigned char status)
-{
-	if (status & SEEQ_RSTAT_OVERF ||
-	    status & SEEQ_RSTAT_SFRAME)
-		dev->stats.rx_over_errors++;
-	if (status & SEEQ_RSTAT_CERROR)
-		dev->stats.rx_crc_errors++;
-	if (status & SEEQ_RSTAT_DERROR)
-		dev->stats.rx_frame_errors++;
-	if (status & SEEQ_RSTAT_REOF)
-		dev->stats.rx_errors++;
-}
-
-static inline void rx_maybe_restart(struct sgiseeq_private *sp,
-				    struct hpc3_ethregs *hregs,
-				    struct sgiseeq_regs *sregs)
-{
-	if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
-		hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc + sp->rx_new);
-		seeq_go(sp, hregs, sregs);
-	}
-}
-
-static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
-			      struct hpc3_ethregs *hregs,
-			      struct sgiseeq_regs *sregs)
-{
-	struct sgiseeq_rx_desc *rd;
-	struct sk_buff *skb = NULL;
-	struct sk_buff *newskb;
-	unsigned char pkt_status;
-	int len = 0;
-	unsigned int orig_end = PREV_RX(sp->rx_new);
-
-	/* Service every received packet. */
-	rd = &sp->rx_desc[sp->rx_new];
-	dma_sync_desc_cpu(dev, rd);
-	while (!(rd->rdma.cntinfo & HPCDMA_OWN)) {
-		len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3;
-		dma_unmap_single(dev->dev.parent, rd->rdma.pbuf,
-				 PKT_BUF_SZ, DMA_FROM_DEVICE);
-		pkt_status = rd->skb->data[len];
-		if (pkt_status & SEEQ_RSTAT_FIG) {
-			/* Packet is OK. */
-			/* We don't want to receive our own packets */
-			if (memcmp(rd->skb->data + 6, dev->dev_addr, ETH_ALEN)) {
-				if (len > rx_copybreak) {
-					skb = rd->skb;
-					newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
-					if (!newskb) {
-						newskb = skb;
-						skb = NULL;
-						goto memory_squeeze;
-					}
-					skb_reserve(newskb, 2);
-				} else {
-					skb = netdev_alloc_skb_ip_align(dev, len);
-					if (skb)
-						skb_copy_to_linear_data(skb, rd->skb->data, len);
-
-					newskb = rd->skb;
-				}
-memory_squeeze:
-				if (skb) {
-					skb_put(skb, len);
-					skb->protocol = eth_type_trans(skb, dev);
-					netif_rx(skb);
-					dev->stats.rx_packets++;
-					dev->stats.rx_bytes += len;
-				} else {
-					printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n",
-						dev->name);
-					dev->stats.rx_dropped++;
-				}
-			} else {
-				/* Silently drop my own packets */
-				newskb = rd->skb;
-			}
-		} else {
-			record_rx_errors(dev, pkt_status);
-			newskb = rd->skb;
-		}
-		rd->skb = newskb;
-		rd->rdma.pbuf = dma_map_single(dev->dev.parent,
-					       newskb->data - 2,
-					       PKT_BUF_SZ, DMA_FROM_DEVICE);
-
-		/* Return the entry to the ring pool. */
-		rd->rdma.cntinfo = RCNTINFO_INIT;
-		sp->rx_new = NEXT_RX(sp->rx_new);
-		dma_sync_desc_dev(dev, rd);
-		rd = &sp->rx_desc[sp->rx_new];
-		dma_sync_desc_cpu(dev, rd);
-	}
-	dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]);
-	sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
-	dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]);
-	dma_sync_desc_cpu(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
-	sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
-	dma_sync_desc_dev(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
-	rx_maybe_restart(sp, hregs, sregs);
-}
-
-static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
-					     struct sgiseeq_regs *sregs)
-{
-	if (sp->is_edlc) {
-		sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
-		sregs->rw.wregs.control = sp->control;
-	}
-}
-
-static inline void kick_tx(struct net_device *dev,
-			   struct sgiseeq_private *sp,
-			   struct hpc3_ethregs *hregs)
-{
-	struct sgiseeq_tx_desc *td;
-	int i = sp->tx_old;
-
-	/* If the HPC aint doin nothin, and there are more packets
-	 * with ETXD cleared and XIU set we must make very certain
-	 * that we restart the HPC else we risk locking up the
-	 * adapter.  The following code is only safe iff the HPCDMA
-	 * is not active!
-	 */
-	td = &sp->tx_desc[i];
-	dma_sync_desc_cpu(dev, td);
-	while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
-	      (HPCDMA_XIU | HPCDMA_ETXD)) {
-		i = NEXT_TX(i);
-		td = &sp->tx_desc[i];
-		dma_sync_desc_cpu(dev, td);
-	}
-	if (td->tdma.cntinfo & HPCDMA_XIU) {
-		hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
-		hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
-	}
-}
-
-static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
-			      struct hpc3_ethregs *hregs,
-			      struct sgiseeq_regs *sregs)
-{
-	struct sgiseeq_tx_desc *td;
-	unsigned long status = hregs->tx_ctrl;
-	int j;
-
-	tx_maybe_reset_collisions(sp, sregs);
-
-	if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
-		/* Oops, HPC detected some sort of error. */
-		if (status & SEEQ_TSTAT_R16)
-			dev->stats.tx_aborted_errors++;
-		if (status & SEEQ_TSTAT_UFLOW)
-			dev->stats.tx_fifo_errors++;
-		if (status & SEEQ_TSTAT_LCLS)
-			dev->stats.collisions++;
-	}
-
-	/* Ack 'em... */
-	for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
-		td = &sp->tx_desc[j];
-
-		dma_sync_desc_cpu(dev, td);
-		if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
-			break;
-		if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
-			if (!(status & HPC3_ETXCTRL_ACTIVE)) {
-				hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
-				hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
-			}
-			break;
-		}
-		dev->stats.tx_packets++;
-		sp->tx_old = NEXT_TX(sp->tx_old);
-		td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
-		td->tdma.cntinfo |= HPCDMA_EOX;
-		if (td->skb) {
-			dev_kfree_skb_any(td->skb);
-			td->skb = NULL;
-		}
-		dma_sync_desc_dev(dev, td);
-	}
-}
-
-static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = (struct net_device *) dev_id;
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct hpc3_ethregs *hregs = sp->hregs;
-	struct sgiseeq_regs *sregs = sp->sregs;
-
-	spin_lock(&sp->tx_lock);
-
-	/* Ack the IRQ and set software state. */
-	hregs->reset = HPC3_ERST_CLRIRQ;
-
-	/* Always check for received packets. */
-	sgiseeq_rx(dev, sp, hregs, sregs);
-
-	/* Only check for tx acks if we have something queued. */
-	if (sp->tx_old != sp->tx_new)
-		sgiseeq_tx(dev, sp, hregs, sregs);
-
-	if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
-		netif_wake_queue(dev);
-	}
-	spin_unlock(&sp->tx_lock);
-
-	return IRQ_HANDLED;
-}
-
-static int sgiseeq_open(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct sgiseeq_regs *sregs = sp->sregs;
-	unsigned int irq = dev->irq;
-	int err;
-
-	if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) {
-		printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq);
-		return -EAGAIN;
-	}
-
-	err = init_seeq(dev, sp, sregs);
-	if (err)
-		goto out_free_irq;
-
-	netif_start_queue(dev);
-
-	return 0;
-
-out_free_irq:
-	free_irq(irq, dev);
-
-	return err;
-}
-
-static int sgiseeq_close(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct sgiseeq_regs *sregs = sp->sregs;
-	unsigned int irq = dev->irq;
-
-	netif_stop_queue(dev);
-
-	/* Shutdown the Seeq. */
-	reset_hpc3_and_seeq(sp->hregs, sregs);
-	free_irq(irq, dev);
-	seeq_purge_ring(dev);
-
-	return 0;
-}
-
-static inline int sgiseeq_reset(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct sgiseeq_regs *sregs = sp->sregs;
-	int err;
-
-	err = init_seeq(dev, sp, sregs);
-	if (err)
-		return err;
-
-	dev->trans_start = jiffies; /* prevent tx timeout */
-	netif_wake_queue(dev);
-
-	return 0;
-}
-
-static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	struct hpc3_ethregs *hregs = sp->hregs;
-	unsigned long flags;
-	struct sgiseeq_tx_desc *td;
-	int len, entry;
-
-	spin_lock_irqsave(&sp->tx_lock, flags);
-
-	/* Setup... */
-	len = skb->len;
-	if (len < ETH_ZLEN) {
-		if (skb_padto(skb, ETH_ZLEN)) {
-			spin_unlock_irqrestore(&sp->tx_lock, flags);
-			return NETDEV_TX_OK;
-		}
-		len = ETH_ZLEN;
-	}
-
-	dev->stats.tx_bytes += len;
-	entry = sp->tx_new;
-	td = &sp->tx_desc[entry];
-	dma_sync_desc_cpu(dev, td);
-
-	/* Create entry.  There are so many races with adding a new
-	 * descriptor to the chain:
-	 * 1) Assume that the HPC is off processing a DMA chain while
-	 *    we are changing all of the following.
-	 * 2) Do no allow the HPC to look at a new descriptor until
-	 *    we have completely set up it's state.  This means, do
-	 *    not clear HPCDMA_EOX in the current last descritptor
-	 *    until the one we are adding looks consistent and could
-	 *    be processes right now.
-	 * 3) The tx interrupt code must notice when we've added a new
-	 *    entry and the HPC got to the end of the chain before we
-	 *    added this new entry and restarted it.
-	 */
-	td->skb = skb;
-	td->tdma.pbuf = dma_map_single(dev->dev.parent, skb->data,
-				       len, DMA_TO_DEVICE);
-	td->tdma.cntinfo = (len & HPCDMA_BCNT) |
-	                   HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX;
-	dma_sync_desc_dev(dev, td);
-	if (sp->tx_old != sp->tx_new) {
-		struct sgiseeq_tx_desc *backend;
-
-		backend = &sp->tx_desc[PREV_TX(sp->tx_new)];
-		dma_sync_desc_cpu(dev, backend);
-		backend->tdma.cntinfo &= ~HPCDMA_EOX;
-		dma_sync_desc_dev(dev, backend);
-	}
-	sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
-
-	/* Maybe kick the HPC back into motion. */
-	if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
-		kick_tx(dev, sp, hregs);
-
-	if (!TX_BUFFS_AVAIL(sp))
-		netif_stop_queue(dev);
-	spin_unlock_irqrestore(&sp->tx_lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-static void timeout(struct net_device *dev)
-{
-	printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name);
-	sgiseeq_reset(dev);
-
-	dev->trans_start = jiffies; /* prevent tx timeout */
-	netif_wake_queue(dev);
-}
-
-static void sgiseeq_set_multicast(struct net_device *dev)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	unsigned char oldmode = sp->mode;
-
-	if(dev->flags & IFF_PROMISC)
-		sp->mode = SEEQ_RCMD_RANY;
-	else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
-		sp->mode = SEEQ_RCMD_RBMCAST;
-	else
-		sp->mode = SEEQ_RCMD_RBCAST;
-
-	/* XXX I know this sucks, but is there a better way to reprogram
-	 * XXX the receiver? At least, this shouldn't happen too often.
-	 */
-
-	if (oldmode != sp->mode)
-		sgiseeq_reset(dev);
-}
-
-static inline void setup_tx_ring(struct net_device *dev,
-				 struct sgiseeq_tx_desc *buf,
-				 int nbufs)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	int i = 0;
-
-	while (i < (nbufs - 1)) {
-		buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
-		buf[i].tdma.pbuf = 0;
-		dma_sync_desc_dev(dev, &buf[i]);
-		i++;
-	}
-	buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf);
-	dma_sync_desc_dev(dev, &buf[i]);
-}
-
-static inline void setup_rx_ring(struct net_device *dev,
-				 struct sgiseeq_rx_desc *buf,
-				 int nbufs)
-{
-	struct sgiseeq_private *sp = netdev_priv(dev);
-	int i = 0;
-
-	while (i < (nbufs - 1)) {
-		buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
-		buf[i].rdma.pbuf = 0;
-		dma_sync_desc_dev(dev, &buf[i]);
-		i++;
-	}
-	buf[i].rdma.pbuf = 0;
-	buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf);
-	dma_sync_desc_dev(dev, &buf[i]);
-}
-
-static const struct net_device_ops sgiseeq_netdev_ops = {
-	.ndo_open		= sgiseeq_open,
-	.ndo_stop		= sgiseeq_close,
-	.ndo_start_xmit		= sgiseeq_start_xmit,
-	.ndo_tx_timeout		= timeout,
-	.ndo_set_multicast_list	= sgiseeq_set_multicast,
-	.ndo_set_mac_address	= sgiseeq_set_mac_address,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static int __devinit sgiseeq_probe(struct platform_device *pdev)
-{
-	struct sgiseeq_platform_data *pd = pdev->dev.platform_data;
-	struct hpc3_regs *hpcregs = pd->hpc;
-	struct sgiseeq_init_block *sr;
-	unsigned int irq = pd->irq;
-	struct sgiseeq_private *sp;
-	struct net_device *dev;
-	int err;
-
-	dev = alloc_etherdev(sizeof (struct sgiseeq_private));
-	if (!dev) {
-		printk(KERN_ERR "Sgiseeq: Etherdev alloc failed, aborting.\n");
-		err = -ENOMEM;
-		goto err_out;
-	}
-
-	platform_set_drvdata(pdev, dev);
-	sp = netdev_priv(dev);
-
-	/* Make private data page aligned */
-	sr = dma_alloc_noncoherent(&pdev->dev, sizeof(*sp->srings),
-				&sp->srings_dma, GFP_KERNEL);
-	if (!sr) {
-		printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
-		err = -ENOMEM;
-		goto err_out_free_dev;
-	}
-	sp->srings = sr;
-	sp->rx_desc = sp->srings->rxvector;
-	sp->tx_desc = sp->srings->txvector;
-
-	/* A couple calculations now, saves many cycles later. */
-	setup_rx_ring(dev, sp->rx_desc, SEEQ_RX_BUFFERS);
-	setup_tx_ring(dev, sp->tx_desc, SEEQ_TX_BUFFERS);
-
-	memcpy(dev->dev_addr, pd->mac, ETH_ALEN);
-
-#ifdef DEBUG
-	gpriv = sp;
-	gdev = dev;
-#endif
-	sp->sregs = (struct sgiseeq_regs *) &hpcregs->eth_ext[0];
-	sp->hregs = &hpcregs->ethregs;
-	sp->name = sgiseeqstr;
-	sp->mode = SEEQ_RCMD_RBCAST;
-
-	/* Setup PIO and DMA transfer timing */
-	sp->hregs->pconfig = 0x161;
-	sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
-			     HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
-
-	/* Setup PIO and DMA transfer timing */
-	sp->hregs->pconfig = 0x161;
-	sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
-			     HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
-
-	/* Reset the chip. */
-	hpc3_eth_reset(sp->hregs);
-
-	sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff);
-	if (sp->is_edlc)
-		sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
-			      SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
-			      SEEQ_CTRL_ENCARR;
-
-	dev->netdev_ops		= &sgiseeq_netdev_ops;
-	dev->watchdog_timeo	= (200 * HZ) / 1000;
-	dev->irq		= irq;
-
-	if (register_netdev(dev)) {
-		printk(KERN_ERR "Sgiseeq: Cannot register net device, "
-		       "aborting.\n");
-		err = -ENODEV;
-		goto err_out_free_page;
-	}
-
-	printk(KERN_INFO "%s: %s %pM\n", dev->name, sgiseeqstr, dev->dev_addr);
-
-	return 0;
-
-err_out_free_page:
-	free_page((unsigned long) sp->srings);
-err_out_free_dev:
-	free_netdev(dev);
-
-err_out:
-	return err;
-}
-
-static int __exit sgiseeq_remove(struct platform_device *pdev)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct sgiseeq_private *sp = netdev_priv(dev);
-
-	unregister_netdev(dev);
-	dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
-			     sp->srings_dma);
-	free_netdev(dev);
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-static struct platform_driver sgiseeq_driver = {
-	.probe	= sgiseeq_probe,
-	.remove	= __exit_p(sgiseeq_remove),
-	.driver = {
-		.name	= "sgiseeq",
-		.owner	= THIS_MODULE,
-	}
-};
-
-static int __init sgiseeq_module_init(void)
-{
-	if (platform_driver_register(&sgiseeq_driver)) {
-		printk(KERN_ERR "Driver registration failed\n");
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
-static void __exit sgiseeq_module_exit(void)
-{
-	platform_driver_unregister(&sgiseeq_driver);
-}
-
-module_init(sgiseeq_module_init);
-module_exit(sgiseeq_module_exit);
-
-MODULE_DESCRIPTION("SGI Seeq 8003 driver");
-MODULE_AUTHOR("Linux/MIPS Mailing List <linux-mips@linux-mips.org>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:sgiseeq");