ioc3-eth/meth: Move the SGI drivers

Move the SGI drivers into drivers/net/ethernet/sgi/ and make the
necessary Kconfig and Makefile changes.

CC: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 855 deletions

diff --git a/drivers/net/meth.c b/drivers/net/meth.c
deleted file mode 100644
index 60135aa55802..000000000000
--- a/drivers/net/meth.c
+++ /dev/null
@@ -1,855 +0,0 @@
-/*
- * meth.c -- O2 Builtin 10/100 Ethernet driver
- *
- * Copyright (C) 2001-2003 Ilya Volynets
- *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License
- *	as published by the Free Software Foundation; either version
- *	2 of the License, or (at your option) any later version.
- */
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <linux/device.h> /* struct device, et al */
-#include <linux/netdevice.h>   /* struct device, and other headers */
-#include <linux/etherdevice.h> /* eth_type_trans */
-#include <linux/ip.h>          /* struct iphdr */
-#include <linux/tcp.h>         /* struct tcphdr */
-#include <linux/skbuff.h>
-#include <linux/mii.h>         /* MII definitions */
-
-#include <asm/ip32/mace.h>
-#include <asm/ip32/ip32_ints.h>
-
-#include <asm/io.h>
-
-#include "meth.h"
-
-#ifndef MFE_DEBUG
-#define MFE_DEBUG 0
-#endif
-
-#if MFE_DEBUG>=1
-#define DPRINTK(str,args...) printk(KERN_DEBUG "meth: %s: " str, __func__ , ## args)
-#define MFE_RX_DEBUG 2
-#else
-#define DPRINTK(str,args...)
-#define MFE_RX_DEBUG 0
-#endif
-
-
-static const char *meth_str="SGI O2 Fast Ethernet";
-
-/* The maximum time waited (in jiffies) before assuming a Tx failed. (400ms) */
-#define TX_TIMEOUT (400*HZ/1000)
-
-static int timeout = TX_TIMEOUT;
-module_param(timeout, int, 0);
-
-/*
- * This structure is private to each device. It is used to pass
- * packets in and out, so there is place for a packet
- */
-struct meth_private {
-	/* in-memory copy of MAC Control register */
-	unsigned long mac_ctrl;
-	/* in-memory copy of DMA Control register */
-	unsigned long dma_ctrl;
-	/* address of PHY, used by mdio_* functions, initialized in mdio_probe */
-	unsigned long phy_addr;
-	tx_packet *tx_ring;
-	dma_addr_t tx_ring_dma;
-	struct sk_buff *tx_skbs[TX_RING_ENTRIES];
-	dma_addr_t tx_skb_dmas[TX_RING_ENTRIES];
-	unsigned long tx_read, tx_write, tx_count;
-
-	rx_packet *rx_ring[RX_RING_ENTRIES];
-	dma_addr_t rx_ring_dmas[RX_RING_ENTRIES];
-	struct sk_buff *rx_skbs[RX_RING_ENTRIES];
-	unsigned long rx_write;
-
-	spinlock_t meth_lock;
-};
-
-static void meth_tx_timeout(struct net_device *dev);
-static irqreturn_t meth_interrupt(int irq, void *dev_id);
-
-/* global, initialized in ip32-setup.c */
-char o2meth_eaddr[8]={0,0,0,0,0,0,0,0};
-
-static inline void load_eaddr(struct net_device *dev)
-{
-	int i;
-	u64 macaddr;
-
-	DPRINTK("Loading MAC Address: %pM\n", dev->dev_addr);
-	macaddr = 0;
-	for (i = 0; i < 6; i++)
-		macaddr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
-
-	mace->eth.mac_addr = macaddr;
-}
-
-/*
- * Waits for BUSY status of mdio bus to clear
- */
-#define WAIT_FOR_PHY(___rval)					\
-	while ((___rval = mace->eth.phy_data) & MDIO_BUSY) {	\
-		udelay(25);					\
-	}
-/*read phy register, return value read */
-static unsigned long mdio_read(struct meth_private *priv, unsigned long phyreg)
-{
-	unsigned long rval;
-	WAIT_FOR_PHY(rval);
-	mace->eth.phy_regs = (priv->phy_addr << 5) | (phyreg & 0x1f);
-	udelay(25);
-	mace->eth.phy_trans_go = 1;
-	udelay(25);
-	WAIT_FOR_PHY(rval);
-	return rval & MDIO_DATA_MASK;
-}
-
-static int mdio_probe(struct meth_private *priv)
-{
-	int i;
-	unsigned long p2, p3, flags;
-	/* check if phy is detected already */
-	if(priv->phy_addr>=0&&priv->phy_addr<32)
-		return 0;
-	spin_lock_irqsave(&priv->meth_lock, flags);
-	for (i=0;i<32;++i){
-		priv->phy_addr=i;
-		p2=mdio_read(priv,2);
-		p3=mdio_read(priv,3);
-#if MFE_DEBUG>=2
-		switch ((p2<<12)|(p3>>4)){
-		case PHY_QS6612X:
-			DPRINTK("PHY is QS6612X\n");
-			break;
-		case PHY_ICS1889:
-			DPRINTK("PHY is ICS1889\n");
-			break;
-		case PHY_ICS1890:
-			DPRINTK("PHY is ICS1890\n");
-			break;
-		case PHY_DP83840:
-			DPRINTK("PHY is DP83840\n");
-			break;
-		}
-#endif
-		if(p2!=0xffff&&p2!=0x0000){
-			DPRINTK("PHY code: %x\n",(p2<<12)|(p3>>4));
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-	if(priv->phy_addr<32) {
-		return 0;
-	}
-	DPRINTK("Oopsie! PHY is not known!\n");
-	priv->phy_addr=-1;
-	return -ENODEV;
-}
-
-static void meth_check_link(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long mii_advertising = mdio_read(priv, 4);
-	unsigned long mii_partner = mdio_read(priv, 5);
-	unsigned long negotiated = mii_advertising & mii_partner;
-	unsigned long duplex, speed;
-
-	if (mii_partner == 0xffff)
-		return;
-
-	speed = (negotiated & 0x0380) ? METH_100MBIT : 0;
-	duplex = ((negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040) ?
-		 METH_PHY_FDX : 0;
-
-	if ((priv->mac_ctrl & METH_PHY_FDX) ^ duplex) {
-		DPRINTK("Setting %s-duplex\n", duplex ? "full" : "half");
-		if (duplex)
-			priv->mac_ctrl |= METH_PHY_FDX;
-		else
-			priv->mac_ctrl &= ~METH_PHY_FDX;
-		mace->eth.mac_ctrl = priv->mac_ctrl;
-	}
-
-	if ((priv->mac_ctrl & METH_100MBIT) ^ speed) {
-		DPRINTK("Setting %dMbs mode\n", speed ? 100 : 10);
-		if (duplex)
-			priv->mac_ctrl |= METH_100MBIT;
-		else
-			priv->mac_ctrl &= ~METH_100MBIT;
-		mace->eth.mac_ctrl = priv->mac_ctrl;
-	}
-}
-
-
-static int meth_init_tx_ring(struct meth_private *priv)
-{
-	/* Init TX ring */
-	priv->tx_ring = dma_alloc_coherent(NULL, TX_RING_BUFFER_SIZE,
-	                                   &priv->tx_ring_dma, GFP_ATOMIC);
-	if (!priv->tx_ring)
-		return -ENOMEM;
-	memset(priv->tx_ring, 0, TX_RING_BUFFER_SIZE);
-	priv->tx_count = priv->tx_read = priv->tx_write = 0;
-	mace->eth.tx_ring_base = priv->tx_ring_dma;
-	/* Now init skb save area */
-	memset(priv->tx_skbs, 0, sizeof(priv->tx_skbs));
-	memset(priv->tx_skb_dmas, 0, sizeof(priv->tx_skb_dmas));
-	return 0;
-}
-
-static int meth_init_rx_ring(struct meth_private *priv)
-{
-	int i;
-
-	for (i = 0; i < RX_RING_ENTRIES; i++) {
-		priv->rx_skbs[i] = alloc_skb(METH_RX_BUFF_SIZE, 0);
-		/* 8byte status vector + 3quad padding + 2byte padding,
-		 * to put data on 64bit aligned boundary */
-		skb_reserve(priv->rx_skbs[i],METH_RX_HEAD);
-		priv->rx_ring[i]=(rx_packet*)(priv->rx_skbs[i]->head);
-		/* I'll need to re-sync it after each RX */
-		priv->rx_ring_dmas[i] =
-			dma_map_single(NULL, priv->rx_ring[i],
-				       METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
-		mace->eth.rx_fifo = priv->rx_ring_dmas[i];
-	}
-        priv->rx_write = 0;
-	return 0;
-}
-static void meth_free_tx_ring(struct meth_private *priv)
-{
-	int i;
-
-	/* Remove any pending skb */
-	for (i = 0; i < TX_RING_ENTRIES; i++) {
-		if (priv->tx_skbs[i])
-			dev_kfree_skb(priv->tx_skbs[i]);
-		priv->tx_skbs[i] = NULL;
-	}
-	dma_free_coherent(NULL, TX_RING_BUFFER_SIZE, priv->tx_ring,
-	                  priv->tx_ring_dma);
-}
-
-/* Presumes RX DMA engine is stopped, and RX fifo ring is reset */
-static void meth_free_rx_ring(struct meth_private *priv)
-{
-	int i;
-
-	for (i = 0; i < RX_RING_ENTRIES; i++) {
-		dma_unmap_single(NULL, priv->rx_ring_dmas[i],
-				 METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
-		priv->rx_ring[i] = 0;
-		priv->rx_ring_dmas[i] = 0;
-		kfree_skb(priv->rx_skbs[i]);
-	}
-}
-
-int meth_reset(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-
-	/* Reset card */
-	mace->eth.mac_ctrl = SGI_MAC_RESET;
-	udelay(1);
-	mace->eth.mac_ctrl = 0;
-	udelay(25);
-
-	/* Load ethernet address */
-	load_eaddr(dev);
-	/* Should load some "errata", but later */
-
-	/* Check for device */
-	if (mdio_probe(priv) < 0) {
-		DPRINTK("Unable to find PHY\n");
-		return -ENODEV;
-	}
-
-	/* Initial mode: 10 | Half-duplex | Accept normal packets */
-	priv->mac_ctrl = METH_ACCEPT_MCAST | METH_DEFAULT_IPG;
-	if (dev->flags & IFF_PROMISC)
-		priv->mac_ctrl |= METH_PROMISC;
-	mace->eth.mac_ctrl = priv->mac_ctrl;
-
-	/* Autonegotiate speed and duplex mode */
-	meth_check_link(dev);
-
-	/* Now set dma control, but don't enable DMA, yet */
-	priv->dma_ctrl = (4 << METH_RX_OFFSET_SHIFT) |
-			 (RX_RING_ENTRIES << METH_RX_DEPTH_SHIFT);
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	return 0;
-}
-
-/*============End Helper Routines=====================*/
-
-/*
- * Open and close
- */
-static int meth_open(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	int ret;
-
-	priv->phy_addr = -1;    /* No PHY is known yet... */
-
-	/* Initialize the hardware */
-	ret = meth_reset(dev);
-	if (ret < 0)
-		return ret;
-
-	/* Allocate the ring buffers */
-	ret = meth_init_tx_ring(priv);
-	if (ret < 0)
-		return ret;
-	ret = meth_init_rx_ring(priv);
-	if (ret < 0)
-		goto out_free_tx_ring;
-
-	ret = request_irq(dev->irq, meth_interrupt, 0, meth_str, dev);
-	if (ret) {
-		printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq);
-		goto out_free_rx_ring;
-	}
-
-	/* Start DMA */
-	priv->dma_ctrl |= METH_DMA_TX_EN | /*METH_DMA_TX_INT_EN |*/
-			  METH_DMA_RX_EN | METH_DMA_RX_INT_EN;
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	DPRINTK("About to start queue\n");
-	netif_start_queue(dev);
-
-	return 0;
-
-out_free_rx_ring:
-	meth_free_rx_ring(priv);
-out_free_tx_ring:
-	meth_free_tx_ring(priv);
-
-	return ret;
-}
-
-static int meth_release(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-
-	DPRINTK("Stopping queue\n");
-	netif_stop_queue(dev); /* can't transmit any more */
-	/* shut down DMA */
-	priv->dma_ctrl &= ~(METH_DMA_TX_EN | METH_DMA_TX_INT_EN |
-			    METH_DMA_RX_EN | METH_DMA_RX_INT_EN);
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-	free_irq(dev->irq, dev);
-	meth_free_tx_ring(priv);
-	meth_free_rx_ring(priv);
-
-	return 0;
-}
-
-/*
- * Receive a packet: retrieve, encapsulate and pass over to upper levels
- */
-static void meth_rx(struct net_device* dev, unsigned long int_status)
-{
-	struct sk_buff *skb;
-	unsigned long status, flags;
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long fifo_rptr = (int_status & METH_INT_RX_RPTR_MASK) >> 8;
-
-	spin_lock_irqsave(&priv->meth_lock, flags);
-	priv->dma_ctrl &= ~METH_DMA_RX_INT_EN;
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-
-	if (int_status & METH_INT_RX_UNDERFLOW) {
-		fifo_rptr = (fifo_rptr - 1) & 0x0f;
-	}
-	while (priv->rx_write != fifo_rptr) {
-		dma_unmap_single(NULL, priv->rx_ring_dmas[priv->rx_write],
-				 METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
-		status = priv->rx_ring[priv->rx_write]->status.raw;
-#if MFE_DEBUG
-		if (!(status & METH_RX_ST_VALID)) {
-			DPRINTK("Not received? status=%016lx\n",status);
-		}
-#endif
-		if ((!(status & METH_RX_STATUS_ERRORS)) && (status & METH_RX_ST_VALID)) {
-			int len = (status & 0xffff) - 4; /* omit CRC */
-			/* length sanity check */
-			if (len < 60 || len > 1518) {
-				printk(KERN_DEBUG "%s: bogus packet size: %ld, status=%#2Lx.\n",
-				       dev->name, priv->rx_write,
-				       priv->rx_ring[priv->rx_write]->status.raw);
-				dev->stats.rx_errors++;
-				dev->stats.rx_length_errors++;
-				skb = priv->rx_skbs[priv->rx_write];
-			} else {
-				skb = alloc_skb(METH_RX_BUFF_SIZE, GFP_ATOMIC);
-				if (!skb) {
-					/* Ouch! No memory! Drop packet on the floor */
-					DPRINTK("No mem: dropping packet\n");
-					dev->stats.rx_dropped++;
-					skb = priv->rx_skbs[priv->rx_write];
-				} else {
-					struct sk_buff *skb_c = priv->rx_skbs[priv->rx_write];
-					/* 8byte status vector + 3quad padding + 2byte padding,
-					 * to put data on 64bit aligned boundary */
-					skb_reserve(skb, METH_RX_HEAD);
-					/* Write metadata, and then pass to the receive level */
-					skb_put(skb_c, len);
-					priv->rx_skbs[priv->rx_write] = skb;
-					skb_c->protocol = eth_type_trans(skb_c, dev);
-					dev->stats.rx_packets++;
-					dev->stats.rx_bytes += len;
-					netif_rx(skb_c);
-				}
-			}
-		} else {
-			dev->stats.rx_errors++;
-			skb=priv->rx_skbs[priv->rx_write];
-#if MFE_DEBUG>0
-			printk(KERN_WARNING "meth: RX error: status=0x%016lx\n",status);
-			if(status&METH_RX_ST_RCV_CODE_VIOLATION)
-				printk(KERN_WARNING "Receive Code Violation\n");
-			if(status&METH_RX_ST_CRC_ERR)
-				printk(KERN_WARNING "CRC error\n");
-			if(status&METH_RX_ST_INV_PREAMBLE_CTX)
-				printk(KERN_WARNING "Invalid Preamble Context\n");
-			if(status&METH_RX_ST_LONG_EVT_SEEN)
-				printk(KERN_WARNING "Long Event Seen...\n");
-			if(status&METH_RX_ST_BAD_PACKET)
-				printk(KERN_WARNING "Bad Packet\n");
-			if(status&METH_RX_ST_CARRIER_EVT_SEEN)
-				printk(KERN_WARNING "Carrier Event Seen\n");
-#endif
-		}
-		priv->rx_ring[priv->rx_write] = (rx_packet*)skb->head;
-		priv->rx_ring[priv->rx_write]->status.raw = 0;
-		priv->rx_ring_dmas[priv->rx_write] =
-			dma_map_single(NULL, priv->rx_ring[priv->rx_write],
-				       METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
-		mace->eth.rx_fifo = priv->rx_ring_dmas[priv->rx_write];
-		ADVANCE_RX_PTR(priv->rx_write);
-	}
-	spin_lock_irqsave(&priv->meth_lock, flags);
-	/* In case there was underflow, and Rx DMA was disabled */
-	priv->dma_ctrl |= METH_DMA_RX_INT_EN | METH_DMA_RX_EN;
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-	mace->eth.int_stat = METH_INT_RX_THRESHOLD;
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-}
-
-static int meth_tx_full(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-
-	return priv->tx_count >= TX_RING_ENTRIES - 1;
-}
-
-static void meth_tx_cleanup(struct net_device* dev, unsigned long int_status)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long status, flags;
-	struct sk_buff *skb;
-	unsigned long rptr = (int_status&TX_INFO_RPTR) >> 16;
-
-	spin_lock_irqsave(&priv->meth_lock, flags);
-
-	/* Stop DMA notification */
-	priv->dma_ctrl &= ~(METH_DMA_TX_INT_EN);
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	while (priv->tx_read != rptr) {
-		skb = priv->tx_skbs[priv->tx_read];
-		status = priv->tx_ring[priv->tx_read].header.raw;
-#if MFE_DEBUG>=1
-		if (priv->tx_read == priv->tx_write)
-			DPRINTK("Auchi! tx_read=%d,tx_write=%d,rptr=%d?\n", priv->tx_read, priv->tx_write,rptr);
-#endif
-		if (status & METH_TX_ST_DONE) {
-			if (status & METH_TX_ST_SUCCESS){
-				dev->stats.tx_packets++;
-				dev->stats.tx_bytes += skb->len;
-			} else {
-				dev->stats.tx_errors++;
-#if MFE_DEBUG>=1
-				DPRINTK("TX error: status=%016lx <",status);
-				if(status & METH_TX_ST_SUCCESS)
-					printk(" SUCCESS");
-				if(status & METH_TX_ST_TOOLONG)
-					printk(" TOOLONG");
-				if(status & METH_TX_ST_UNDERRUN)
-					printk(" UNDERRUN");
-				if(status & METH_TX_ST_EXCCOLL)
-					printk(" EXCCOLL");
-				if(status & METH_TX_ST_DEFER)
-					printk(" DEFER");
-				if(status & METH_TX_ST_LATECOLL)
-					printk(" LATECOLL");
-				printk(" >\n");
-#endif
-			}
-		} else {
-			DPRINTK("RPTR points us here, but packet not done?\n");
-			break;
-		}
-		dev_kfree_skb_irq(skb);
-		priv->tx_skbs[priv->tx_read] = NULL;
-		priv->tx_ring[priv->tx_read].header.raw = 0;
-		priv->tx_read = (priv->tx_read+1)&(TX_RING_ENTRIES-1);
-		priv->tx_count--;
-	}
-
-	/* wake up queue if it was stopped */
-	if (netif_queue_stopped(dev) && !meth_tx_full(dev)) {
-		netif_wake_queue(dev);
-	}
-
-	mace->eth.int_stat = METH_INT_TX_EMPTY | METH_INT_TX_PKT;
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-}
-
-static void meth_error(struct net_device* dev, unsigned status)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long flags;
-
-	printk(KERN_WARNING "meth: error status: 0x%08x\n",status);
-	/* check for errors too... */
-	if (status & (METH_INT_TX_LINK_FAIL))
-		printk(KERN_WARNING "meth: link failure\n");
-	/* Should I do full reset in this case? */
-	if (status & (METH_INT_MEM_ERROR))
-		printk(KERN_WARNING "meth: memory error\n");
-	if (status & (METH_INT_TX_ABORT))
-		printk(KERN_WARNING "meth: aborted\n");
-	if (status & (METH_INT_RX_OVERFLOW))
-		printk(KERN_WARNING "meth: Rx overflow\n");
-	if (status & (METH_INT_RX_UNDERFLOW)) {
-		printk(KERN_WARNING "meth: Rx underflow\n");
-		spin_lock_irqsave(&priv->meth_lock, flags);
-		mace->eth.int_stat = METH_INT_RX_UNDERFLOW;
-		/* more underflow interrupts will be delivered,
-		 * effectively throwing us into an infinite loop.
-		 *  Thus I stop processing Rx in this case. */
-		priv->dma_ctrl &= ~METH_DMA_RX_EN;
-		mace->eth.dma_ctrl = priv->dma_ctrl;
-		DPRINTK("Disabled meth Rx DMA temporarily\n");
-		spin_unlock_irqrestore(&priv->meth_lock, flags);
-	}
-	mace->eth.int_stat = METH_INT_ERROR;
-}
-
-/*
- * The typical interrupt entry point
- */
-static irqreturn_t meth_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = (struct net_device *)dev_id;
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long status;
-
-	status = mace->eth.int_stat;
-	while (status & 0xff) {
-		/* First handle errors - if we get Rx underflow,
-		 * Rx DMA will be disabled, and Rx handler will reenable
-		 * it. I don't think it's possible to get Rx underflow,
-		 * without getting Rx interrupt */
-		if (status & METH_INT_ERROR) {
-			meth_error(dev, status);
-		}
-		if (status & (METH_INT_TX_EMPTY | METH_INT_TX_PKT)) {
-			/* a transmission is over: free the skb */
-			meth_tx_cleanup(dev, status);
-		}
-		if (status & METH_INT_RX_THRESHOLD) {
-			if (!(priv->dma_ctrl & METH_DMA_RX_INT_EN))
-				break;
-			/* send it to meth_rx for handling */
-			meth_rx(dev, status);
-		}
-		status = mace->eth.int_stat;
-	}
-
-	return IRQ_HANDLED;
-}
-
-/*
- * Transmits packets that fit into TX descriptor (are <=120B)
- */
-static void meth_tx_short_prepare(struct meth_private *priv,
-				  struct sk_buff *skb)
-{
-	tx_packet *desc = &priv->tx_ring[priv->tx_write];
-	int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
-	desc->header.raw = METH_TX_CMD_INT_EN | (len-1) | ((128-len) << 16);
-	/* maybe I should set whole thing to 0 first... */
-	skb_copy_from_linear_data(skb, desc->data.dt + (120 - len), skb->len);
-	if (skb->len < len)
-		memset(desc->data.dt + 120 - len + skb->len, 0, len-skb->len);
-}
-#define TX_CATBUF1 BIT(25)
-static void meth_tx_1page_prepare(struct meth_private *priv,
-				  struct sk_buff *skb)
-{
-	tx_packet *desc = &priv->tx_ring[priv->tx_write];
-	void *buffer_data = (void *)(((unsigned long)skb->data + 7) & ~7);
-	int unaligned_len = (int)((unsigned long)buffer_data - (unsigned long)skb->data);
-	int buffer_len = skb->len - unaligned_len;
-	dma_addr_t catbuf;
-
-	desc->header.raw = METH_TX_CMD_INT_EN | TX_CATBUF1 | (skb->len - 1);
-
-	/* unaligned part */
-	if (unaligned_len) {
-		skb_copy_from_linear_data(skb, desc->data.dt + (120 - unaligned_len),
-			      unaligned_len);
-		desc->header.raw |= (128 - unaligned_len) << 16;
-	}
-
-	/* first page */
-	catbuf = dma_map_single(NULL, buffer_data, buffer_len,
-				DMA_TO_DEVICE);
-	desc->data.cat_buf[0].form.start_addr = catbuf >> 3;
-	desc->data.cat_buf[0].form.len = buffer_len - 1;
-}
-#define TX_CATBUF2 BIT(26)
-static void meth_tx_2page_prepare(struct meth_private *priv,
-				  struct sk_buff *skb)
-{
-	tx_packet *desc = &priv->tx_ring[priv->tx_write];
-	void *buffer1_data = (void *)(((unsigned long)skb->data + 7) & ~7);
-	void *buffer2_data = (void *)PAGE_ALIGN((unsigned long)skb->data);
-	int unaligned_len = (int)((unsigned long)buffer1_data - (unsigned long)skb->data);
-	int buffer1_len = (int)((unsigned long)buffer2_data - (unsigned long)buffer1_data);
-	int buffer2_len = skb->len - buffer1_len - unaligned_len;
-	dma_addr_t catbuf1, catbuf2;
-
-	desc->header.raw = METH_TX_CMD_INT_EN | TX_CATBUF1 | TX_CATBUF2| (skb->len - 1);
-	/* unaligned part */
-	if (unaligned_len){
-		skb_copy_from_linear_data(skb, desc->data.dt + (120 - unaligned_len),
-			      unaligned_len);
-		desc->header.raw |= (128 - unaligned_len) << 16;
-	}
-
-	/* first page */
-	catbuf1 = dma_map_single(NULL, buffer1_data, buffer1_len,
-				 DMA_TO_DEVICE);
-	desc->data.cat_buf[0].form.start_addr = catbuf1 >> 3;
-	desc->data.cat_buf[0].form.len = buffer1_len - 1;
-	/* second page */
-	catbuf2 = dma_map_single(NULL, buffer2_data, buffer2_len,
-				 DMA_TO_DEVICE);
-	desc->data.cat_buf[1].form.start_addr = catbuf2 >> 3;
-	desc->data.cat_buf[1].form.len = buffer2_len - 1;
-}
-
-static void meth_add_to_tx_ring(struct meth_private *priv, struct sk_buff *skb)
-{
-	/* Remember the skb, so we can free it at interrupt time */
-	priv->tx_skbs[priv->tx_write] = skb;
-	if (skb->len <= 120) {
-		/* Whole packet fits into descriptor */
-		meth_tx_short_prepare(priv, skb);
-	} else if (PAGE_ALIGN((unsigned long)skb->data) !=
-		   PAGE_ALIGN((unsigned long)skb->data + skb->len - 1)) {
-		/* Packet crosses page boundary */
-		meth_tx_2page_prepare(priv, skb);
-	} else {
-		/* Packet is in one page */
-		meth_tx_1page_prepare(priv, skb);
-	}
-	priv->tx_write = (priv->tx_write + 1) & (TX_RING_ENTRIES - 1);
-	mace->eth.tx_info = priv->tx_write;
-	priv->tx_count++;
-}
-
-/*
- * Transmit a packet (called by the kernel)
- */
-static int meth_tx(struct sk_buff *skb, struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv->meth_lock, flags);
-	/* Stop DMA notification */
-	priv->dma_ctrl &= ~(METH_DMA_TX_INT_EN);
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	meth_add_to_tx_ring(priv, skb);
-	dev->trans_start = jiffies; /* save the timestamp */
-
-	/* If TX ring is full, tell the upper layer to stop sending packets */
-	if (meth_tx_full(dev)) {
-	        printk(KERN_DEBUG "TX full: stopping\n");
-		netif_stop_queue(dev);
-	}
-
-	/* Restart DMA notification */
-	priv->dma_ctrl |= METH_DMA_TX_INT_EN;
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-/*
- * Deal with a transmit timeout.
- */
-static void meth_tx_timeout(struct net_device *dev)
-{
-	struct meth_private *priv = netdev_priv(dev);
-	unsigned long flags;
-
-	printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
-
-	/* Protect against concurrent rx interrupts */
-	spin_lock_irqsave(&priv->meth_lock,flags);
-
-	/* Try to reset the interface. */
-	meth_reset(dev);
-
-	dev->stats.tx_errors++;
-
-	/* Clear all rings */
-	meth_free_tx_ring(priv);
-	meth_free_rx_ring(priv);
-	meth_init_tx_ring(priv);
-	meth_init_rx_ring(priv);
-
-	/* Restart dma */
-	priv->dma_ctrl |= METH_DMA_TX_EN | METH_DMA_RX_EN | METH_DMA_RX_INT_EN;
-	mace->eth.dma_ctrl = priv->dma_ctrl;
-
-	/* Enable interrupt */
-	spin_unlock_irqrestore(&priv->meth_lock, flags);
-
-	dev->trans_start = jiffies; /* prevent tx timeout */
-	netif_wake_queue(dev);
-}
-
-/*
- * Ioctl commands
- */
-static int meth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
-	/* XXX Not yet implemented */
-	switch(cmd) {
-	case SIOCGMIIPHY:
-	case SIOCGMIIREG:
-	case SIOCSMIIREG:
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
-static const struct net_device_ops meth_netdev_ops = {
-	.ndo_open		= meth_open,
-	.ndo_stop		= meth_release,
-	.ndo_start_xmit		= meth_tx,
-	.ndo_do_ioctl		= meth_ioctl,
-	.ndo_tx_timeout		= meth_tx_timeout,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address	= eth_mac_addr,
-};
-
-/*
- * The init function.
- */
-static int __devinit meth_probe(struct platform_device *pdev)
-{
-	struct net_device *dev;
-	struct meth_private *priv;
-	int err;
-
-	dev = alloc_etherdev(sizeof(struct meth_private));
-	if (!dev)
-		return -ENOMEM;
-
-	dev->netdev_ops		= &meth_netdev_ops;
-	dev->watchdog_timeo	= timeout;
-	dev->irq		= MACE_ETHERNET_IRQ;
-	dev->base_addr		= (unsigned long)&mace->eth;
-	memcpy(dev->dev_addr, o2meth_eaddr, 6);
-
-	priv = netdev_priv(dev);
-	spin_lock_init(&priv->meth_lock);
-	SET_NETDEV_DEV(dev, &pdev->dev);
-
-	err = register_netdev(dev);
-	if (err) {
-		free_netdev(dev);
-		return err;
-	}
-
-	printk(KERN_INFO "%s: SGI MACE Ethernet rev. %d\n",
-	       dev->name, (unsigned int)(mace->eth.mac_ctrl >> 29));
-	return 0;
-}
-
-static int __exit meth_remove(struct platform_device *pdev)
-{
-	struct net_device *dev = platform_get_drvdata(pdev);
-
-	unregister_netdev(dev);
-	free_netdev(dev);
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-static struct platform_driver meth_driver = {
-	.probe	= meth_probe,
-	.remove	= __exit_p(meth_remove),
-	.driver = {
-		.name	= "meth",
-		.owner	= THIS_MODULE,
-	}
-};
-
-static int __init meth_init_module(void)
-{
-	int err;
-
-	err = platform_driver_register(&meth_driver);
-	if (err)
-		printk(KERN_ERR "Driver registration failed\n");
-
-	return err;
-}
-
-static void __exit meth_exit_module(void)
-{
-	platform_driver_unregister(&meth_driver);
-}
-
-module_init(meth_init_module);
-module_exit(meth_exit_module);
-
-MODULE_AUTHOR("Ilya Volynets <ilya@theIlya.com>");
-MODULE_DESCRIPTION("SGI O2 Builtin Fast Ethernet driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:meth");