myri_sbus: remove driver

Remove the myri_sbus driver. Why?
* There is no possibility of ethernet mode on this adapter, so it's
  Myrinet only.
* It won't inter-op with modern versions of Myrinet, and thus can only
  work with legacy adapters.
* There are no in-kernel Linux drivers for the PCI version of this
  adapter, so it only can work on ~15 year old Sun hardware.

It's long in the tooth, let's take it to the knackers.

Signed-off-by: Jon Mason <mason@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 1187 deletions

diff --git a/drivers/net/myri_sbus.c b/drivers/net/myri_sbus.c
deleted file mode 100644
index 53aeea4b536e..000000000000
--- a/drivers/net/myri_sbus.c
+++ /dev/null
@@ -1,1187 +0,0 @@
-/* myri_sbus.c: MyriCOM MyriNET SBUS card driver.
- *
- * Copyright (C) 1996, 1999, 2006, 2008 David S. Miller (davem@davemloft.net)
- */
-
-static char version[] =
-        "myri_sbus.c:v2.0 June 23, 2006 David S. Miller (davem@davemloft.net)\n";
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/bitops.h>
-#include <linux/dma-mapping.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/firmware.h>
-#include <linux/gfp.h>
-
-#include <net/dst.h>
-#include <net/arp.h>
-#include <net/sock.h>
-#include <net/ipv6.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-#include <asm/idprom.h>
-#include <asm/openprom.h>
-#include <asm/oplib.h>
-#include <asm/auxio.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-
-#include "myri_sbus.h"
-
-/* #define DEBUG_DETECT */
-/* #define DEBUG_IRQ */
-/* #define DEBUG_TRANSMIT */
-/* #define DEBUG_RECEIVE */
-/* #define DEBUG_HEADER */
-
-#ifdef DEBUG_DETECT
-#define DET(x)   printk x
-#else
-#define DET(x)
-#endif
-
-#ifdef DEBUG_IRQ
-#define DIRQ(x)  printk x
-#else
-#define DIRQ(x)
-#endif
-
-#ifdef DEBUG_TRANSMIT
-#define DTX(x)  printk x
-#else
-#define DTX(x)
-#endif
-
-#ifdef DEBUG_RECEIVE
-#define DRX(x)  printk x
-#else
-#define DRX(x)
-#endif
-
-#ifdef DEBUG_HEADER
-#define DHDR(x) printk x
-#else
-#define DHDR(x)
-#endif
-
-/* Firmware name */
-#define FWNAME		"myricom/lanai.bin"
-
-static void myri_reset_off(void __iomem *lp, void __iomem *cregs)
-{
-	/* Clear IRQ mask. */
-	sbus_writel(0, lp + LANAI_EIMASK);
-
-	/* Turn RESET function off. */
-	sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL);
-}
-
-static void myri_reset_on(void __iomem *cregs)
-{
-	/* Enable RESET function. */
-	sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL);
-
-	/* Disable IRQ's. */
-	sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
-}
-
-static void myri_disable_irq(void __iomem *lp, void __iomem *cregs)
-{
-	sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
-	sbus_writel(0, lp + LANAI_EIMASK);
-	sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT);
-}
-
-static void myri_enable_irq(void __iomem *lp, void __iomem *cregs)
-{
-	sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL);
-	sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK);
-}
-
-static inline void bang_the_chip(struct myri_eth *mp)
-{
-	struct myri_shmem __iomem *shmem = mp->shmem;
-	void __iomem *cregs		= mp->cregs;
-
-	sbus_writel(1, &shmem->send);
-	sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
-}
-
-static int myri_do_handshake(struct myri_eth *mp)
-{
-	struct myri_shmem __iomem *shmem = mp->shmem;
-	void __iomem *cregs = mp->cregs;
-	struct myri_channel __iomem *chan = &shmem->channel;
-	int tick 			= 0;
-
-	DET(("myri_do_handshake: "));
-	if (sbus_readl(&chan->state) == STATE_READY) {
-		DET(("Already STATE_READY, failed.\n"));
-		return -1;	/* We're hosed... */
-	}
-
-	myri_disable_irq(mp->lregs, cregs);
-
-	while (tick++ < 25) {
-		u32 softstate;
-
-		/* Wake it up. */
-		DET(("shakedown, CONTROL_WON, "));
-		sbus_writel(1, &shmem->shakedown);
-		sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
-
-		softstate = sbus_readl(&chan->state);
-		DET(("chanstate[%08x] ", softstate));
-		if (softstate == STATE_READY) {
-			DET(("wakeup successful, "));
-			break;
-		}
-
-		if (softstate != STATE_WFN) {
-			DET(("not WFN setting that, "));
-			sbus_writel(STATE_WFN, &chan->state);
-		}
-
-		udelay(20);
-	}
-
-	myri_enable_irq(mp->lregs, cregs);
-
-	if (tick > 25) {
-		DET(("25 ticks we lose, failure.\n"));
-		return -1;
-	}
-	DET(("success\n"));
-	return 0;
-}
-
-static int __devinit myri_load_lanai(struct myri_eth *mp)
-{
-	const struct firmware	*fw;
-	struct net_device	*dev = mp->dev;
-	struct myri_shmem __iomem *shmem = mp->shmem;
-	void __iomem		*rptr;
-	int 			i, lanai4_data_size;
-
-	myri_disable_irq(mp->lregs, mp->cregs);
-	myri_reset_on(mp->cregs);
-
-	rptr = mp->lanai;
-	for (i = 0; i < mp->eeprom.ramsz; i++)
-		sbus_writeb(0, rptr + i);
-
-	if (mp->eeprom.cpuvers >= CPUVERS_3_0)
-		sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL);
-
-	i = request_firmware(&fw, FWNAME, &mp->myri_op->dev);
-	if (i) {
-		printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
-		       FWNAME, i);
-		return i;
-	}
-	if (fw->size < 2) {
-		printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
-		       fw->size, FWNAME);
-		release_firmware(fw);
-		return -EINVAL;
-	}
-	lanai4_data_size = fw->data[0] << 8 | fw->data[1];
-
-	/* Load executable code. */
-	for (i = 2; i < fw->size; i++)
-		sbus_writeb(fw->data[i], rptr++);
-
-	/* Load data segment. */
-	for (i = 0; i < lanai4_data_size; i++)
-		sbus_writeb(0, rptr++);
-
-	/* Set device address. */
-	sbus_writeb(0, &shmem->addr[0]);
-	sbus_writeb(0, &shmem->addr[1]);
-	for (i = 0; i < 6; i++)
-		sbus_writeb(dev->dev_addr[i],
-			    &shmem->addr[i + 2]);
-
-	/* Set SBUS bursts and interrupt mask. */
-	sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst);
-	sbus_writel(SHMEM_IMASK_RX, &shmem->imask);
-
-	/* Release the LANAI. */
-	myri_disable_irq(mp->lregs, mp->cregs);
-	myri_reset_off(mp->lregs, mp->cregs);
-	myri_disable_irq(mp->lregs, mp->cregs);
-
-	/* Wait for the reset to complete. */
-	for (i = 0; i < 5000; i++) {
-		if (sbus_readl(&shmem->channel.state) != STATE_READY)
-			break;
-		else
-			udelay(10);
-	}
-
-	if (i == 5000)
-		printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n");
-
-	i = myri_do_handshake(mp);
-	if (i)
-		printk(KERN_ERR "myricom: Handshake with LANAI failed.\n");
-
-	if (mp->eeprom.cpuvers == CPUVERS_4_0)
-		sbus_writel(0, mp->lregs + LANAI_VERS);
-
-	release_firmware(fw);
-	return i;
-}
-
-static void myri_clean_rings(struct myri_eth *mp)
-{
-	struct sendq __iomem *sq = mp->sq;
-	struct recvq __iomem *rq = mp->rq;
-	int i;
-
-	sbus_writel(0, &rq->tail);
-	sbus_writel(0, &rq->head);
-	for (i = 0; i < (RX_RING_SIZE+1); i++) {
-		if (mp->rx_skbs[i] != NULL) {
-			struct myri_rxd __iomem *rxd = &rq->myri_rxd[i];
-			u32 dma_addr;
-
-			dma_addr = sbus_readl(&rxd->myri_scatters[0].addr);
-			dma_unmap_single(&mp->myri_op->dev, dma_addr,
-					 RX_ALLOC_SIZE, DMA_FROM_DEVICE);
-			dev_kfree_skb(mp->rx_skbs[i]);
-			mp->rx_skbs[i] = NULL;
-		}
-	}
-
-	mp->tx_old = 0;
-	sbus_writel(0, &sq->tail);
-	sbus_writel(0, &sq->head);
-	for (i = 0; i < TX_RING_SIZE; i++) {
-		if (mp->tx_skbs[i] != NULL) {
-			struct sk_buff *skb = mp->tx_skbs[i];
-			struct myri_txd __iomem *txd = &sq->myri_txd[i];
-			u32 dma_addr;
-
-			dma_addr = sbus_readl(&txd->myri_gathers[0].addr);
-			dma_unmap_single(&mp->myri_op->dev, dma_addr,
-					 (skb->len + 3) & ~3,
-					 DMA_TO_DEVICE);
-			dev_kfree_skb(mp->tx_skbs[i]);
-			mp->tx_skbs[i] = NULL;
-		}
-	}
-}
-
-static void myri_init_rings(struct myri_eth *mp, int from_irq)
-{
-	struct recvq __iomem *rq = mp->rq;
-	struct myri_rxd __iomem *rxd = &rq->myri_rxd[0];
-	struct net_device *dev = mp->dev;
-	gfp_t gfp_flags = GFP_KERNEL;
-	int i;
-
-	if (from_irq || in_interrupt())
-		gfp_flags = GFP_ATOMIC;
-
-	myri_clean_rings(mp);
-	for (i = 0; i < RX_RING_SIZE; i++) {
-		struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags);
-		u32 dma_addr;
-
-		if (!skb)
-			continue;
-		mp->rx_skbs[i] = skb;
-		skb->dev = dev;
-		skb_put(skb, RX_ALLOC_SIZE);
-
-		dma_addr = dma_map_single(&mp->myri_op->dev,
-					  skb->data, RX_ALLOC_SIZE,
-					  DMA_FROM_DEVICE);
-		sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr);
-		sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len);
-		sbus_writel(i, &rxd[i].ctx);
-		sbus_writel(1, &rxd[i].num_sg);
-	}
-	sbus_writel(0, &rq->head);
-	sbus_writel(RX_RING_SIZE, &rq->tail);
-}
-
-static int myri_init(struct myri_eth *mp, int from_irq)
-{
-	myri_init_rings(mp, from_irq);
-	return 0;
-}
-
-static void myri_is_not_so_happy(struct myri_eth *mp)
-{
-}
-
-#ifdef DEBUG_HEADER
-static void dump_ehdr(struct ethhdr *ehdr)
-{
-	printk("ehdr[h_dst(%pM)"
-	       "h_source(%pM)"
-	       "h_proto(%04x)]\n",
-	       ehdr->h_dest, ehdr->h_source, ehdr->h_proto);
-}
-
-static void dump_ehdr_and_myripad(unsigned char *stuff)
-{
-	struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2);
-
-	printk("pad[%02x:%02x]", stuff[0], stuff[1]);
-	dump_ehdr(ehdr);
-}
-#endif
-
-static void myri_tx(struct myri_eth *mp, struct net_device *dev)
-{
-	struct sendq __iomem *sq= mp->sq;
-	int entry		= mp->tx_old;
-	int limit		= sbus_readl(&sq->head);
-
-	DTX(("entry[%d] limit[%d] ", entry, limit));
-	if (entry == limit)
-		return;
-	while (entry != limit) {
-		struct sk_buff *skb = mp->tx_skbs[entry];
-		u32 dma_addr;
-
-		DTX(("SKB[%d] ", entry));
-		dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr);
-		dma_unmap_single(&mp->myri_op->dev, dma_addr,
-				 skb->len, DMA_TO_DEVICE);
-		dev_kfree_skb(skb);
-		mp->tx_skbs[entry] = NULL;
-		dev->stats.tx_packets++;
-		entry = NEXT_TX(entry);
-	}
-	mp->tx_old = entry;
-}
-
-/* Determine the packet's protocol ID. The rule here is that we
- * assume 802.3 if the type field is short enough to be a length.
- * This is normal practice and works for any 'now in use' protocol.
- */
-static __be16 myri_type_trans(struct sk_buff *skb, struct net_device *dev)
-{
-	struct ethhdr *eth;
-	unsigned char *rawp;
-
-	skb_set_mac_header(skb, MYRI_PAD_LEN);
-	skb_pull(skb, dev->hard_header_len);
-	eth = eth_hdr(skb);
-
-#ifdef DEBUG_HEADER
-	DHDR(("myri_type_trans: "));
-	dump_ehdr(eth);
-#endif
-	if (*eth->h_dest & 1) {
-		if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0)
-			skb->pkt_type = PACKET_BROADCAST;
-		else
-			skb->pkt_type = PACKET_MULTICAST;
-	} else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
-		if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
-			skb->pkt_type = PACKET_OTHERHOST;
-	}
-
-	if (ntohs(eth->h_proto) >= 1536)
-		return eth->h_proto;
-
-	rawp = skb->data;
-
-	/* This is a magic hack to spot IPX packets. Older Novell breaks
-	 * the protocol design and runs IPX over 802.3 without an 802.2 LLC
-	 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
-	 * won't work for fault tolerant netware but does for the rest.
-	 */
-	if (*(unsigned short *)rawp == 0xFFFF)
-		return htons(ETH_P_802_3);
-
-	/* Real 802.2 LLC */
-	return htons(ETH_P_802_2);
-}
-
-static void myri_rx(struct myri_eth *mp, struct net_device *dev)
-{
-	struct recvq __iomem *rq = mp->rq;
-	struct recvq __iomem *rqa = mp->rqack;
-	int entry		= sbus_readl(&rqa->head);
-	int limit		= sbus_readl(&rqa->tail);
-	int drops;
-
-	DRX(("entry[%d] limit[%d] ", entry, limit));
-	if (entry == limit)
-		return;
-	drops = 0;
-	DRX(("\n"));
-	while (entry != limit) {
-		struct myri_rxd __iomem *rxdack = &rqa->myri_rxd[entry];
-		u32 csum		= sbus_readl(&rxdack->csum);
-		int len			= sbus_readl(&rxdack->myri_scatters[0].len);
-		int index		= sbus_readl(&rxdack->ctx);
-		struct myri_rxd __iomem *rxd = &rq->myri_rxd[sbus_readl(&rq->tail)];
-		struct sk_buff *skb	= mp->rx_skbs[index];
-
-		/* Ack it. */
-		sbus_writel(NEXT_RX(entry), &rqa->head);
-
-		/* Check for errors. */
-		DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum));
-		dma_sync_single_for_cpu(&mp->myri_op->dev,
-					sbus_readl(&rxd->myri_scatters[0].addr),
-					RX_ALLOC_SIZE, DMA_FROM_DEVICE);
-		if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) {
-			DRX(("ERROR["));
-			dev->stats.rx_errors++;
-			if (len < (ETH_HLEN + MYRI_PAD_LEN)) {
-				DRX(("BAD_LENGTH] "));
-				dev->stats.rx_length_errors++;
-			} else {
-				DRX(("NO_PADDING] "));
-				dev->stats.rx_frame_errors++;
-			}
-
-			/* Return it to the LANAI. */
-	drop_it:
-			drops++;
-			DRX(("DROP "));
-			dev->stats.rx_dropped++;
-			dma_sync_single_for_device(&mp->myri_op->dev,
-						   sbus_readl(&rxd->myri_scatters[0].addr),
-						   RX_ALLOC_SIZE,
-						   DMA_FROM_DEVICE);
-			sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
-			sbus_writel(index, &rxd->ctx);
-			sbus_writel(1, &rxd->num_sg);
-			sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
-			goto next;
-		}
-
-		DRX(("len[%d] ", len));
-		if (len > RX_COPY_THRESHOLD) {
-			struct sk_buff *new_skb;
-			u32 dma_addr;
-
-			DRX(("BIGBUFF "));
-			new_skb = myri_alloc_skb(RX_ALLOC_SIZE, GFP_ATOMIC);
-			if (new_skb == NULL) {
-				DRX(("skb_alloc(FAILED) "));
-				goto drop_it;
-			}
-			dma_unmap_single(&mp->myri_op->dev,
-					 sbus_readl(&rxd->myri_scatters[0].addr),
-					 RX_ALLOC_SIZE,
-					 DMA_FROM_DEVICE);
-			mp->rx_skbs[index] = new_skb;
-			new_skb->dev = dev;
-			skb_put(new_skb, RX_ALLOC_SIZE);
-			dma_addr = dma_map_single(&mp->myri_op->dev,
-						  new_skb->data,
-						  RX_ALLOC_SIZE,
-						  DMA_FROM_DEVICE);
-			sbus_writel(dma_addr, &rxd->myri_scatters[0].addr);
-			sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
-			sbus_writel(index, &rxd->ctx);
-			sbus_writel(1, &rxd->num_sg);
-			sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
-
-			/* Trim the original skb for the netif. */
-			DRX(("trim(%d) ", len));
-			skb_trim(skb, len);
-		} else {
-			struct sk_buff *copy_skb = dev_alloc_skb(len);
-
-			DRX(("SMALLBUFF "));
-			if (copy_skb == NULL) {
-				DRX(("dev_alloc_skb(FAILED) "));
-				goto drop_it;
-			}
-			/* DMA sync already done above. */
-			copy_skb->dev = dev;
-			DRX(("resv_and_put "));
-			skb_put(copy_skb, len);
-			skb_copy_from_linear_data(skb, copy_skb->data, len);
-
-			/* Reuse original ring buffer. */
-			DRX(("reuse "));
-			dma_sync_single_for_device(&mp->myri_op->dev,
-						   sbus_readl(&rxd->myri_scatters[0].addr),
-						   RX_ALLOC_SIZE,
-						   DMA_FROM_DEVICE);
-			sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
-			sbus_writel(index, &rxd->ctx);
-			sbus_writel(1, &rxd->num_sg);
-			sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
-
-			skb = copy_skb;
-		}
-
-		/* Just like the happy meal we get checksums from this card. */
-		skb->csum = csum;
-		skb->ip_summed = CHECKSUM_UNNECESSARY; /* XXX */
-
-		skb->protocol = myri_type_trans(skb, dev);
-		DRX(("prot[%04x] netif_rx ", skb->protocol));
-		netif_rx(skb);
-
-		dev->stats.rx_packets++;
-		dev->stats.rx_bytes += len;
-	next:
-		DRX(("NEXT\n"));
-		entry = NEXT_RX(entry);
-	}
-}
-
-static irqreturn_t myri_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev		= (struct net_device *) dev_id;
-	struct myri_eth *mp		= netdev_priv(dev);
-	void __iomem *lregs		= mp->lregs;
-	struct myri_channel __iomem *chan = &mp->shmem->channel;
-	unsigned long flags;
-	u32 status;
-	int handled = 0;
-
-	spin_lock_irqsave(&mp->irq_lock, flags);
-
-	status = sbus_readl(lregs + LANAI_ISTAT);
-	DIRQ(("myri_interrupt: status[%08x] ", status));
-	if (status & ISTAT_HOST) {
-		u32 softstate;
-
-		handled = 1;
-		DIRQ(("IRQ_DISAB "));
-		myri_disable_irq(lregs, mp->cregs);
-		softstate = sbus_readl(&chan->state);
-		DIRQ(("state[%08x] ", softstate));
-		if (softstate != STATE_READY) {
-			DIRQ(("myri_not_so_happy "));
-			myri_is_not_so_happy(mp);
-		}
-		DIRQ(("\nmyri_rx: "));
-		myri_rx(mp, dev);
-		DIRQ(("\nistat=ISTAT_HOST "));
-		sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
-		DIRQ(("IRQ_ENAB "));
-		myri_enable_irq(lregs, mp->cregs);
-	}
-	DIRQ(("\n"));
-
-	spin_unlock_irqrestore(&mp->irq_lock, flags);
-
-	return IRQ_RETVAL(handled);
-}
-
-static int myri_open(struct net_device *dev)
-{
-	struct myri_eth *mp = netdev_priv(dev);
-
-	return myri_init(mp, in_interrupt());
-}
-
-static int myri_close(struct net_device *dev)
-{
-	struct myri_eth *mp = netdev_priv(dev);
-
-	myri_clean_rings(mp);
-	return 0;
-}
-
-static void myri_tx_timeout(struct net_device *dev)
-{
-	struct myri_eth *mp = netdev_priv(dev);
-
-	printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
-
-	dev->stats.tx_errors++;
-	myri_init(mp, 0);
-	netif_wake_queue(dev);
-}
-
-static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct myri_eth *mp = netdev_priv(dev);
-	struct sendq __iomem *sq = mp->sq;
-	struct myri_txd __iomem *txd;
-	unsigned long flags;
-	unsigned int head, tail;
-	int len, entry;
-	u32 dma_addr;
-
-	DTX(("myri_start_xmit: "));
-
-	myri_tx(mp, dev);
-
-	netif_stop_queue(dev);
-
-	/* This is just to prevent multiple PIO reads for TX_BUFFS_AVAIL. */
-	head = sbus_readl(&sq->head);
-	tail = sbus_readl(&sq->tail);
-
-	if (!TX_BUFFS_AVAIL(head, tail)) {
-		DTX(("no buffs available, returning 1\n"));
-		return NETDEV_TX_BUSY;
-	}
-
-	spin_lock_irqsave(&mp->irq_lock, flags);
-
-	DHDR(("xmit[skbdata(%p)]\n", skb->data));
-#ifdef DEBUG_HEADER
-	dump_ehdr_and_myripad(((unsigned char *) skb->data));
-#endif
-
-	/* XXX Maybe this can go as well. */
-	len = skb->len;
-	if (len & 3) {
-		DTX(("len&3 "));
-		len = (len + 4) & (~3);
-	}
-
-	entry = sbus_readl(&sq->tail);
-
-	txd = &sq->myri_txd[entry];
-	mp->tx_skbs[entry] = skb;
-
-	/* Must do this before we sbus map it. */
-	if (skb->data[MYRI_PAD_LEN] & 0x1) {
-		sbus_writew(0xffff, &txd->addr[0]);
-		sbus_writew(0xffff, &txd->addr[1]);
-		sbus_writew(0xffff, &txd->addr[2]);
-		sbus_writew(0xffff, &txd->addr[3]);
-	} else {
-		sbus_writew(0xffff, &txd->addr[0]);
-		sbus_writew((skb->data[0] << 8) | skb->data[1], &txd->addr[1]);
-		sbus_writew((skb->data[2] << 8) | skb->data[3], &txd->addr[2]);
-		sbus_writew((skb->data[4] << 8) | skb->data[5], &txd->addr[3]);
-	}
-
-	dma_addr = dma_map_single(&mp->myri_op->dev, skb->data,
-				  len, DMA_TO_DEVICE);
-	sbus_writel(dma_addr, &txd->myri_gathers[0].addr);
-	sbus_writel(len, &txd->myri_gathers[0].len);
-	sbus_writel(1, &txd->num_sg);
-	sbus_writel(KERNEL_CHANNEL, &txd->chan);
-	sbus_writel(len, &txd->len);
-	sbus_writel((u32)-1, &txd->csum_off);
-	sbus_writel(0, &txd->csum_field);
-
-	sbus_writel(NEXT_TX(entry), &sq->tail);
-	DTX(("BangTheChip "));
-	bang_the_chip(mp);
-
-	DTX(("tbusy=0, returning 0\n"));
-	netif_start_queue(dev);
-	spin_unlock_irqrestore(&mp->irq_lock, flags);
-	return NETDEV_TX_OK;
-}
-
-/* Create the MyriNet MAC header for an arbitrary protocol layer
- *
- * saddr=NULL	means use device source address
- * daddr=NULL	means leave destination address (eg unresolved arp)
- */
-static int myri_header(struct sk_buff *skb, struct net_device *dev,
-		       unsigned short type, const void *daddr,
-		       const void *saddr, unsigned len)
-{
-	struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
-	unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN);
-
-#ifdef DEBUG_HEADER
-	DHDR(("myri_header: pad[%02x,%02x] ", pad[0], pad[1]));
-	dump_ehdr(eth);
-#endif
-
-	/* Set the MyriNET padding identifier. */
-	pad[0] = MYRI_PAD_LEN;
-	pad[1] = 0xab;
-
-	/* Set the protocol type. For a packet of type ETH_P_802_3/2 we put the
-	 * length in here instead.
-	 */
-	if (type != ETH_P_802_3 && type != ETH_P_802_2)
-		eth->h_proto = htons(type);
-	else
-		eth->h_proto = htons(len);
-
-	/* Set the source hardware address. */
-	if (saddr)
-		memcpy(eth->h_source, saddr, dev->addr_len);
-	else
-		memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
-
-	/* Anyway, the loopback-device should never use this function... */
-	if (dev->flags & IFF_LOOPBACK) {
-		int i;
-		for (i = 0; i < dev->addr_len; i++)
-			eth->h_dest[i] = 0;
-		return dev->hard_header_len;
-	}
-
-	if (daddr) {
-		memcpy(eth->h_dest, daddr, dev->addr_len);
-		return dev->hard_header_len;
-	}
-	return -dev->hard_header_len;
-}
-
-/* Rebuild the MyriNet MAC header. This is called after an ARP
- * (or in future other address resolution) has completed on this
- * sk_buff. We now let ARP fill in the other fields.
- */
-static int myri_rebuild_header(struct sk_buff *skb)
-{
-	unsigned char *pad = (unsigned char *) skb->data;
-	struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
-	struct net_device *dev = skb->dev;
-
-#ifdef DEBUG_HEADER
-	DHDR(("myri_rebuild_header: pad[%02x,%02x] ", pad[0], pad[1]));
-	dump_ehdr(eth);
-#endif
-
-	/* Refill MyriNet padding identifiers, this is just being anal. */
-	pad[0] = MYRI_PAD_LEN;
-	pad[1] = 0xab;
-
-	switch (eth->h_proto)
-	{
-#ifdef CONFIG_INET
-	case cpu_to_be16(ETH_P_IP):
- 		return arp_find(eth->h_dest, skb);
-#endif
-
-	default:
-		printk(KERN_DEBUG
-		       "%s: unable to resolve type %X addresses.\n",
-		       dev->name, (int)eth->h_proto);
-
-		memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
-		return 0;
-		break;
-	}
-
-	return 0;
-}
-
-static int myri_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
-{
-	unsigned short type = hh->hh_type;
-	unsigned char *pad;
-	struct ethhdr *eth;
-	const struct net_device *dev = neigh->dev;
-
-	pad = ((unsigned char *) hh->hh_data) +
-		HH_DATA_OFF(sizeof(*eth) + MYRI_PAD_LEN);
-	eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
-
-	if (type == htons(ETH_P_802_3))
-		return -1;
-
-	/* Refill MyriNet padding identifiers, this is just being anal. */
-	pad[0] = MYRI_PAD_LEN;
-	pad[1] = 0xab;
-
-	eth->h_proto = type;
-	memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
-	memcpy(eth->h_dest, neigh->ha, dev->addr_len);
-	hh->hh_len = 16;
-	return 0;
-}
-
-
-/* Called by Address Resolution module to notify changes in address. */
-void myri_header_cache_update(struct hh_cache *hh,
-			      const struct net_device *dev,
-			      const unsigned char * haddr)
-{
-	memcpy(((u8*)hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
-	       haddr, dev->addr_len);
-}
-
-static int myri_change_mtu(struct net_device *dev, int new_mtu)
-{
-	if ((new_mtu < (ETH_HLEN + MYRI_PAD_LEN)) || (new_mtu > MYRINET_MTU))
-		return -EINVAL;
-	dev->mtu = new_mtu;
-	return 0;
-}
-
-static void myri_set_multicast(struct net_device *dev)
-{
-	/* Do nothing, all MyriCOM nodes transmit multicast frames
-	 * as broadcast packets...
-	 */
-}
-
-static inline void set_boardid_from_idprom(struct myri_eth *mp, int num)
-{
-	mp->eeprom.id[0] = 0;
-	mp->eeprom.id[1] = idprom->id_machtype;
-	mp->eeprom.id[2] = (idprom->id_sernum >> 16) & 0xff;
-	mp->eeprom.id[3] = (idprom->id_sernum >> 8) & 0xff;
-	mp->eeprom.id[4] = (idprom->id_sernum >> 0) & 0xff;
-	mp->eeprom.id[5] = num;
-}
-
-static inline void determine_reg_space_size(struct myri_eth *mp)
-{
-	switch(mp->eeprom.cpuvers) {
-	case CPUVERS_2_3:
-	case CPUVERS_3_0:
-	case CPUVERS_3_1:
-	case CPUVERS_3_2:
-		mp->reg_size = (3 * 128 * 1024) + 4096;
-		break;
-
-	case CPUVERS_4_0:
-	case CPUVERS_4_1:
-		mp->reg_size = ((4096<<1) + mp->eeprom.ramsz);
-		break;
-
-	case CPUVERS_4_2:
-	case CPUVERS_5_0:
-	default:
-		printk("myricom: AIEEE weird cpu version %04x assuming pre4.0\n",
-		       mp->eeprom.cpuvers);
-		mp->reg_size = (3 * 128 * 1024) + 4096;
-	}
-}
-
-#ifdef DEBUG_DETECT
-static void dump_eeprom(struct myri_eth *mp)
-{
-	printk("EEPROM: clockval[%08x] cpuvers[%04x] "
-	       "id[%02x,%02x,%02x,%02x,%02x,%02x]\n",
-	       mp->eeprom.cval, mp->eeprom.cpuvers,
-	       mp->eeprom.id[0], mp->eeprom.id[1], mp->eeprom.id[2],
-	       mp->eeprom.id[3], mp->eeprom.id[4], mp->eeprom.id[5]);
-	printk("EEPROM: ramsz[%08x]\n", mp->eeprom.ramsz);
-	printk("EEPROM: fvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
-	       mp->eeprom.fvers[0], mp->eeprom.fvers[1], mp->eeprom.fvers[2],
-	       mp->eeprom.fvers[3], mp->eeprom.fvers[4], mp->eeprom.fvers[5],
-	       mp->eeprom.fvers[6], mp->eeprom.fvers[7]);
-	printk("EEPROM:       %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
-	       mp->eeprom.fvers[8], mp->eeprom.fvers[9], mp->eeprom.fvers[10],
-	       mp->eeprom.fvers[11], mp->eeprom.fvers[12], mp->eeprom.fvers[13],
-	       mp->eeprom.fvers[14], mp->eeprom.fvers[15]);
-	printk("EEPROM:       %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
-	       mp->eeprom.fvers[16], mp->eeprom.fvers[17], mp->eeprom.fvers[18],
-	       mp->eeprom.fvers[19], mp->eeprom.fvers[20], mp->eeprom.fvers[21],
-	       mp->eeprom.fvers[22], mp->eeprom.fvers[23]);
-	printk("EEPROM:       %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
-	       mp->eeprom.fvers[24], mp->eeprom.fvers[25], mp->eeprom.fvers[26],
-	       mp->eeprom.fvers[27], mp->eeprom.fvers[28], mp->eeprom.fvers[29],
-	       mp->eeprom.fvers[30], mp->eeprom.fvers[31]);
-	printk("EEPROM: mvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
-	       mp->eeprom.mvers[0], mp->eeprom.mvers[1], mp->eeprom.mvers[2],
-	       mp->eeprom.mvers[3], mp->eeprom.mvers[4], mp->eeprom.mvers[5],
-	       mp->eeprom.mvers[6], mp->eeprom.mvers[7]);
-	printk("EEPROM:       %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
-	       mp->eeprom.mvers[8], mp->eeprom.mvers[9], mp->eeprom.mvers[10],
-	       mp->eeprom.mvers[11], mp->eeprom.mvers[12], mp->eeprom.mvers[13],
-	       mp->eeprom.mvers[14], mp->eeprom.mvers[15]);
-	printk("EEPROM: dlval[%04x] brd_type[%04x] bus_type[%04x] prod_code[%04x]\n",
-	       mp->eeprom.dlval, mp->eeprom.brd_type, mp->eeprom.bus_type,
-	       mp->eeprom.prod_code);
-	printk("EEPROM: serial_num[%08x]\n", mp->eeprom.serial_num);
-}
-#endif
-
-static const struct header_ops myri_header_ops = {
-	.create		= myri_header,
-	.rebuild	= myri_rebuild_header,
-	.cache	 	= myri_header_cache,
-	.cache_update	= myri_header_cache_update,
-};
-
-static const struct net_device_ops myri_ops = {
-	.ndo_open		= myri_open,
-	.ndo_stop		= myri_close,
-	.ndo_start_xmit		= myri_start_xmit,
-	.ndo_set_multicast_list	= myri_set_multicast,
-	.ndo_tx_timeout		= myri_tx_timeout,
-	.ndo_change_mtu		= myri_change_mtu,
-	.ndo_set_mac_address	= eth_mac_addr,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-static int __devinit myri_sbus_probe(struct platform_device *op)
-{
-	struct device_node *dp = op->dev.of_node;
-	static unsigned version_printed;
-	struct net_device *dev;
-	struct myri_eth *mp;
-	const void *prop;
-	static int num;
-	int i, len;
-
-	DET(("myri_ether_init(%p,%d):\n", op, num));
-	dev = alloc_etherdev(sizeof(struct myri_eth));
-	if (!dev)
-		return -ENOMEM;
-
-	if (version_printed++ == 0)
-		printk(version);
-
-	SET_NETDEV_DEV(dev, &op->dev);
-
-	mp = netdev_priv(dev);
-	spin_lock_init(&mp->irq_lock);
-	mp->myri_op = op;
-
-	/* Clean out skb arrays. */
-	for (i = 0; i < (RX_RING_SIZE + 1); i++)
-		mp->rx_skbs[i] = NULL;
-
-	for (i = 0; i < TX_RING_SIZE; i++)
-		mp->tx_skbs[i] = NULL;
-
-	/* First check for EEPROM information. */
-	prop = of_get_property(dp, "myrinet-eeprom-info", &len);
-
-	if (prop)
-		memcpy(&mp->eeprom, prop, sizeof(struct myri_eeprom));
-	if (!prop) {
-		/* No eeprom property, must cook up the values ourselves. */
-		DET(("No EEPROM: "));
-		mp->eeprom.bus_type = BUS_TYPE_SBUS;
-		mp->eeprom.cpuvers =
-			of_getintprop_default(dp, "cpu_version", 0);
-		mp->eeprom.cval =
-			of_getintprop_default(dp, "clock_value", 0);
-		mp->eeprom.ramsz = of_getintprop_default(dp, "sram_size", 0);
-		if (!mp->eeprom.cpuvers)
-			mp->eeprom.cpuvers = CPUVERS_2_3;
-		if (mp->eeprom.cpuvers < CPUVERS_3_0)
-			mp->eeprom.cval = 0;
-		if (!mp->eeprom.ramsz)
-			mp->eeprom.ramsz = (128 * 1024);
-
-		prop = of_get_property(dp, "myrinet-board-id", &len);
-		if (prop)
-			memcpy(&mp->eeprom.id[0], prop, 6);
-		else
-			set_boardid_from_idprom(mp, num);
-
-		prop = of_get_property(dp, "fpga_version", &len);
-		if (prop)
-			memcpy(&mp->eeprom.fvers[0], prop, 32);
-		else
-			memset(&mp->eeprom.fvers[0], 0, 32);
-
-		if (mp->eeprom.cpuvers == CPUVERS_4_1) {
-			if (mp->eeprom.ramsz == (128 * 1024))
-				mp->eeprom.ramsz = (256 * 1024);
-			if ((mp->eeprom.cval == 0x40414041) ||
-			    (mp->eeprom.cval == 0x90449044))
-				mp->eeprom.cval = 0x50e450e4;
-		}
-	}
-#ifdef DEBUG_DETECT
-	dump_eeprom(mp);
-#endif
-
-	for (i = 0; i < 6; i++)
-		dev->dev_addr[i] = mp->eeprom.id[i];
-
-	determine_reg_space_size(mp);
-
-	/* Map in the MyriCOM register/localram set. */
-	if (mp->eeprom.cpuvers < CPUVERS_4_0) {
-		/* XXX Makes no sense, if control reg is non-existent this
-		 * XXX driver cannot function at all... maybe pre-4.0 is
-		 * XXX only a valid version for PCI cards?  Ask feldy...
-		 */
-		DET(("Mapping regs for cpuvers < CPUVERS_4_0\n"));
-		mp->regs = of_ioremap(&op->resource[0], 0,
-				      mp->reg_size, "MyriCOM Regs");
-		if (!mp->regs) {
-			printk("MyriCOM: Cannot map MyriCOM registers.\n");
-			goto err;
-		}
-		mp->lanai = mp->regs + (256 * 1024);
-		mp->lregs = mp->lanai + (0x10000 * 2);
-	} else {
-		DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n"));
-		mp->cregs = of_ioremap(&op->resource[0], 0,
-				       PAGE_SIZE, "MyriCOM Control Regs");
-		mp->lregs = of_ioremap(&op->resource[0], (256 * 1024),
-					 PAGE_SIZE, "MyriCOM LANAI Regs");
-		mp->lanai = of_ioremap(&op->resource[0], (512 * 1024),
-				       mp->eeprom.ramsz, "MyriCOM SRAM");
-	}
-	DET(("Registers mapped: cregs[%p] lregs[%p] lanai[%p]\n",
-	     mp->cregs, mp->lregs, mp->lanai));
-
-	if (mp->eeprom.cpuvers >= CPUVERS_4_0)
-		mp->shmem_base = 0xf000;
-	else
-		mp->shmem_base = 0x8000;
-
-	DET(("Shared memory base is %04x, ", mp->shmem_base));
-
-	mp->shmem = (struct myri_shmem __iomem *)
-		(mp->lanai + (mp->shmem_base * 2));
-	DET(("shmem mapped at %p\n", mp->shmem));
-
-	mp->rqack	= &mp->shmem->channel.recvqa;
-	mp->rq		= &mp->shmem->channel.recvq;
-	mp->sq		= &mp->shmem->channel.sendq;
-
-	/* Reset the board. */
-	DET(("Resetting LANAI\n"));
-	myri_reset_off(mp->lregs, mp->cregs);
-	myri_reset_on(mp->cregs);
-
-	/* Turn IRQ's off. */
-	myri_disable_irq(mp->lregs, mp->cregs);
-
-	/* Reset once more. */
-	myri_reset_on(mp->cregs);
-
-	/* Get the supported DVMA burst sizes from our SBUS. */
-	mp->myri_bursts = of_getintprop_default(dp->parent,
-						"burst-sizes", 0x00);
-	if (!sbus_can_burst64())
-		mp->myri_bursts &= ~(DMA_BURST64);
-
-	DET(("MYRI bursts %02x\n", mp->myri_bursts));
-
-	/* Encode SBUS interrupt level in second control register. */
-	i = of_getintprop_default(dp, "interrupts", 0);
-	if (i == 0)
-		i = 4;
-	DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n",
-	     i, (1 << i)));
-
-	sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL);
-
-	mp->dev = dev;
-	dev->watchdog_timeo = 5*HZ;
-	dev->irq = op->archdata.irqs[0];
-	dev->netdev_ops = &myri_ops;
-
-	/* Register interrupt handler now. */
-	DET(("Requesting MYRIcom IRQ line.\n"));
-	if (request_irq(dev->irq, myri_interrupt,
-			IRQF_SHARED, "MyriCOM Ethernet", (void *) dev)) {
-		printk("MyriCOM: Cannot register interrupt handler.\n");
-		goto err;
-	}
-
-	dev->mtu		= MYRINET_MTU;
-	dev->header_ops		= &myri_header_ops;
-
-	dev->hard_header_len	= (ETH_HLEN + MYRI_PAD_LEN);
-
-	/* Load code onto the LANai. */
-	DET(("Loading LANAI firmware\n"));
-	if (myri_load_lanai(mp)) {
-		printk(KERN_ERR "MyriCOM: Cannot Load LANAI firmware.\n");
-		goto err_free_irq;
-	}
-
-	if (register_netdev(dev)) {
-		printk("MyriCOM: Cannot register device.\n");
-		goto err_free_irq;
-	}
-
-	dev_set_drvdata(&op->dev, mp);
-
-	num++;
-
-	printk("%s: MyriCOM MyriNET Ethernet %pM\n",
-	       dev->name, dev->dev_addr);
-
-	return 0;
-
-err_free_irq:
-	free_irq(dev->irq, dev);
-err:
-	/* This will also free the co-allocated private data*/
-	free_netdev(dev);
-	return -ENODEV;
-}
-
-static int __devexit myri_sbus_remove(struct platform_device *op)
-{
-	struct myri_eth *mp = dev_get_drvdata(&op->dev);
-	struct net_device *net_dev = mp->dev;
-
-	unregister_netdev(net_dev);
-
-	free_irq(net_dev->irq, net_dev);
-
-	if (mp->eeprom.cpuvers < CPUVERS_4_0) {
-		of_iounmap(&op->resource[0], mp->regs, mp->reg_size);
-	} else {
-		of_iounmap(&op->resource[0], mp->cregs, PAGE_SIZE);
-		of_iounmap(&op->resource[0], mp->lregs, (256 * 1024));
-		of_iounmap(&op->resource[0], mp->lanai, (512 * 1024));
-	}
-
-	free_netdev(net_dev);
-
-	dev_set_drvdata(&op->dev, NULL);
-
-	return 0;
-}
-
-static const struct of_device_id myri_sbus_match[] = {
-	{
-		.name = "MYRICOM,mlanai",
-	},
-	{
-		.name = "myri",
-	},
-	{},
-};
-
-MODULE_DEVICE_TABLE(of, myri_sbus_match);
-
-static struct platform_driver myri_sbus_driver = {
-	.driver = {
-		.name = "myri",
-		.owner = THIS_MODULE,
-		.of_match_table = myri_sbus_match,
-	},
-	.probe		= myri_sbus_probe,
-	.remove		= __devexit_p(myri_sbus_remove),
-};
-
-static int __init myri_sbus_init(void)
-{
-	return platform_driver_register(&myri_sbus_driver);
-}
-
-static void __exit myri_sbus_exit(void)
-{
-	platform_driver_unregister(&myri_sbus_driver);
-}
-
-module_init(myri_sbus_init);
-module_exit(myri_sbus_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE(FWNAME);