toshiba: Move the Toshiba drivers

Move the Toshiba ethernet drivers into drivers/net/ethernet/toshiba
and make the necessary Kconfig and Makefile changes.

CC: Geoff Levand <geoff@infradead.org>
CC: Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
CC: Ishizaki Kou <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 2603 deletions

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
deleted file mode 100644
index 1ff3491c824..00000000000
--- a/drivers/net/spider_net.c
+++ /dev/null
@@ -1,2603 +0,0 @@
-/*
- * Network device driver for Cell Processor-Based Blade and Celleb platform
- *
- * (C) Copyright IBM Corp. 2005
- * (C) Copyright 2006 TOSHIBA CORPORATION
- *
- * Authors : Utz Bacher <utz.bacher@de.ibm.com>
- *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
- *
- * 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, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/compiler.h>
-#include <linux/crc32.h>
-#include <linux/delay.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/firmware.h>
-#include <linux/if_vlan.h>
-#include <linux/in.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/gfp.h>
-#include <linux/ioport.h>
-#include <linux/ip.h>
-#include <linux/kernel.h>
-#include <linux/mii.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/device.h>
-#include <linux/pci.h>
-#include <linux/skbuff.h>
-#include <linux/tcp.h>
-#include <linux/types.h>
-#include <linux/vmalloc.h>
-#include <linux/wait.h>
-#include <linux/workqueue.h>
-#include <linux/bitops.h>
-#include <asm/pci-bridge.h>
-#include <net/checksum.h>
-
-#include "spider_net.h"
-
-MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
-	      "<Jens.Osterkamp@de.ibm.com>");
-MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(VERSION);
-MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
-
-static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
-static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
-
-module_param(rx_descriptors, int, 0444);
-module_param(tx_descriptors, int, 0444);
-
-MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
-		 "in rx chains");
-MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
-		 "in tx chain");
-
-char spider_net_driver_name[] = "spidernet";
-
-static DEFINE_PCI_DEVICE_TABLE(spider_net_pci_tbl) = {
-	{ PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
-	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
-	{ 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
-
-/**
- * spider_net_read_reg - reads an SMMIO register of a card
- * @card: device structure
- * @reg: register to read from
- *
- * returns the content of the specified SMMIO register.
- */
-static inline u32
-spider_net_read_reg(struct spider_net_card *card, u32 reg)
-{
-	/* We use the powerpc specific variants instead of readl_be() because
-	 * we know spidernet is not a real PCI device and we can thus avoid the
-	 * performance hit caused by the PCI workarounds.
-	 */
-	return in_be32(card->regs + reg);
-}
-
-/**
- * spider_net_write_reg - writes to an SMMIO register of a card
- * @card: device structure
- * @reg: register to write to
- * @value: value to write into the specified SMMIO register
- */
-static inline void
-spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
-{
-	/* We use the powerpc specific variants instead of writel_be() because
-	 * we know spidernet is not a real PCI device and we can thus avoid the
-	 * performance hit caused by the PCI workarounds.
-	 */
-	out_be32(card->regs + reg, value);
-}
-
-/** spider_net_write_phy - write to phy register
- * @netdev: adapter to be written to
- * @mii_id: id of MII
- * @reg: PHY register
- * @val: value to be written to phy register
- *
- * spider_net_write_phy_register writes to an arbitrary PHY
- * register via the spider GPCWOPCMD register. We assume the queue does
- * not run full (not more than 15 commands outstanding).
- **/
-static void
-spider_net_write_phy(struct net_device *netdev, int mii_id,
-		     int reg, int val)
-{
-	struct spider_net_card *card = netdev_priv(netdev);
-	u32 writevalue;
-
-	writevalue = ((u32)mii_id << 21) |
-		((u32)reg << 16) | ((u32)val);
-
-	spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
-}
-
-/** spider_net_read_phy - read from phy register
- * @netdev: network device to be read from
- * @mii_id: id of MII
- * @reg: PHY register
- *
- * Returns value read from PHY register
- *
- * spider_net_write_phy reads from an arbitrary PHY
- * register via the spider GPCROPCMD register
- **/
-static int
-spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
-{
-	struct spider_net_card *card = netdev_priv(netdev);
-	u32 readvalue;
-
-	readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
-	spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
-
-	/* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
-	 * interrupt, as we poll for the completion of the read operation
-	 * in spider_net_read_phy. Should take about 50 us */
-	do {
-		readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
-	} while (readvalue & SPIDER_NET_GPREXEC);
-
-	readvalue &= SPIDER_NET_GPRDAT_MASK;
-
-	return readvalue;
-}
-
-/**
- * spider_net_setup_aneg - initial auto-negotiation setup
- * @card: device structure
- **/
-static void
-spider_net_setup_aneg(struct spider_net_card *card)
-{
-	struct mii_phy *phy = &card->phy;
-	u32 advertise = 0;
-	u16 bmsr, estat;
-
-	bmsr  = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
-	estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
-
-	if (bmsr & BMSR_10HALF)
-		advertise |= ADVERTISED_10baseT_Half;
-	if (bmsr & BMSR_10FULL)
-		advertise |= ADVERTISED_10baseT_Full;
-	if (bmsr & BMSR_100HALF)
-		advertise |= ADVERTISED_100baseT_Half;
-	if (bmsr & BMSR_100FULL)
-		advertise |= ADVERTISED_100baseT_Full;
-
-	if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
-		advertise |= SUPPORTED_1000baseT_Full;
-	if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
-		advertise |= SUPPORTED_1000baseT_Half;
-
-	mii_phy_probe(phy, phy->mii_id);
-	phy->def->ops->setup_aneg(phy, advertise);
-
-}
-
-/**
- * spider_net_rx_irq_off - switch off rx irq on this spider card
- * @card: device structure
- *
- * switches off rx irq by masking them out in the GHIINTnMSK register
- */
-static void
-spider_net_rx_irq_off(struct spider_net_card *card)
-{
-	u32 regvalue;
-
-	regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
-	spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
-}
-
-/**
- * spider_net_rx_irq_on - switch on rx irq on this spider card
- * @card: device structure
- *
- * switches on rx irq by enabling them in the GHIINTnMSK register
- */
-static void
-spider_net_rx_irq_on(struct spider_net_card *card)
-{
-	u32 regvalue;
-
-	regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
-	spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
-}
-
-/**
- * spider_net_set_promisc - sets the unicast address or the promiscuous mode
- * @card: card structure
- *
- * spider_net_set_promisc sets the unicast destination address filter and
- * thus either allows for non-promisc mode or promisc mode
- */
-static void
-spider_net_set_promisc(struct spider_net_card *card)
-{
-	u32 macu, macl;
-	struct net_device *netdev = card->netdev;
-
-	if (netdev->flags & IFF_PROMISC) {
-		/* clear destination entry 0 */
-		spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
-		spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
-		spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
-				     SPIDER_NET_PROMISC_VALUE);
-	} else {
-		macu = netdev->dev_addr[0];
-		macu <<= 8;
-		macu |= netdev->dev_addr[1];
-		memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
-
-		macu |= SPIDER_NET_UA_DESCR_VALUE;
-		spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
-		spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
-		spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
-				     SPIDER_NET_NONPROMISC_VALUE);
-	}
-}
-
-/**
- * spider_net_get_mac_address - read mac address from spider card
- * @card: device structure
- *
- * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
- */
-static int
-spider_net_get_mac_address(struct net_device *netdev)
-{
-	struct spider_net_card *card = netdev_priv(netdev);
-	u32 macl, macu;
-
-	macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
-	macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
-
-	netdev->dev_addr[0] = (macu >> 24) & 0xff;
-	netdev->dev_addr[1] = (macu >> 16) & 0xff;
-	netdev->dev_addr[2] = (macu >> 8) & 0xff;
-	netdev->dev_addr[3] = macu & 0xff;
-	netdev->dev_addr[4] = (macl >> 8) & 0xff;
-	netdev->dev_addr[5] = macl & 0xff;
-
-	if (!is_valid_ether_addr(&netdev->dev_addr[0]))
-		return -EINVAL;
-
-	return 0;
-}
-
-/**
- * spider_net_get_descr_status -- returns the status of a descriptor
- * @descr: descriptor to look at
- *
- * returns the status as in the dmac_cmd_status field of the descriptor
- */
-static inline int
-spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
-{
-	return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
-}
-
-/**
- * spider_net_free_chain - free descriptor chain
- * @card: card structure
- * @chain: address of chain
- *
- */
-static void
-spider_net_free_chain(struct spider_net_card *card,
-		      struct spider_net_descr_chain *chain)
-{
-	struct spider_net_descr *descr;
-
-	descr = chain->ring;
-	do {
-		descr->bus_addr = 0;
-		descr->hwdescr->next_descr_addr = 0;
-		descr = descr->next;
-	} while (descr != chain->ring);
-
-	dma_free_coherent(&card->pdev->dev, chain->num_desc,
-	    chain->hwring, chain->dma_addr);
-}
-
-/**
- * spider_net_init_chain - alloc and link descriptor chain
- * @card: card structure
- * @chain: address of chain
- *
- * We manage a circular list that mirrors the hardware structure,
- * except that the hardware uses bus addresses.
- *
- * Returns 0 on success, <0 on failure
- */
-static int
-spider_net_init_chain(struct spider_net_card *card,
-		       struct spider_net_descr_chain *chain)
-{
-	int i;
-	struct spider_net_descr *descr;
-	struct spider_net_hw_descr *hwdescr;
-	dma_addr_t buf;
-	size_t alloc_size;
-
-	alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
-
-	chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
-		&chain->dma_addr, GFP_KERNEL);
-
-	if (!chain->hwring)
-		return -ENOMEM;
-
-	memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr));
-
-	/* Set up the hardware pointers in each descriptor */
-	descr = chain->ring;
-	hwdescr = chain->hwring;
-	buf = chain->dma_addr;
-	for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
-		hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
-		hwdescr->next_descr_addr = 0;
-
-		descr->hwdescr = hwdescr;
-		descr->bus_addr = buf;
-		descr->next = descr + 1;
-		descr->prev = descr - 1;
-
-		buf += sizeof(struct spider_net_hw_descr);
-	}
-	/* do actual circular list */
-	(descr-1)->next = chain->ring;
-	chain->ring->prev = descr-1;
-
-	spin_lock_init(&chain->lock);
-	chain->head = chain->ring;
-	chain->tail = chain->ring;
-	return 0;
-}
-
-/**
- * spider_net_free_rx_chain_contents - frees descr contents in rx chain
- * @card: card structure
- *
- * returns 0 on success, <0 on failure
- */
-static void
-spider_net_free_rx_chain_contents(struct spider_net_card *card)
-{
-	struct spider_net_descr *descr;
-
-	descr = card->rx_chain.head;
-	do {
-		if (descr->skb) {
-			pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
-					 SPIDER_NET_MAX_FRAME,
-					 PCI_DMA_BIDIRECTIONAL);
-			dev_kfree_skb(descr->skb);
-			descr->skb = NULL;
-		}
-		descr = descr->next;
-	} while (descr != card->rx_chain.head);
-}
-
-/**
- * spider_net_prepare_rx_descr - Reinitialize RX descriptor
- * @card: card structure
- * @descr: descriptor to re-init
- *
- * Return 0 on success, <0 on failure.
- *
- * Allocates a new rx skb, iommu-maps it and attaches it to the
- * descriptor. Mark the descriptor as activated, ready-to-use.
- */
-static int
-spider_net_prepare_rx_descr(struct spider_net_card *card,
-			    struct spider_net_descr *descr)
-{
-	struct spider_net_hw_descr *hwdescr = descr->hwdescr;
-	dma_addr_t buf;
-	int offset;
-	int bufsize;
-
-	/* we need to round up the buffer size to a multiple of 128 */
-	bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
-		(~(SPIDER_NET_RXBUF_ALIGN - 1));
-
-	/* and we need to have it 128 byte aligned, therefore we allocate a
-	 * bit more */
-	/* allocate an skb */
-	descr->skb = netdev_alloc_skb(card->netdev,
-				      bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
-	if (!descr->skb) {
-		if (netif_msg_rx_err(card) && net_ratelimit())
-			dev_err(&card->netdev->dev,
-			        "Not enough memory to allocate rx buffer\n");
-		card->spider_stats.alloc_rx_skb_error++;
-		return -ENOMEM;
-	}
-	hwdescr->buf_size = bufsize;
-	hwdescr->result_size = 0;
-	hwdescr->valid_size = 0;
-	hwdescr->data_status = 0;
-	hwdescr->data_error = 0;
-
-	offset = ((unsigned long)descr->skb->data) &
-		(SPIDER_NET_RXBUF_ALIGN - 1);
-	if (offset)
-		skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
-	/* iommu-map the skb */
-	buf = pci_map_single(card->pdev, descr->skb->data,
-			SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
-	if (pci_dma_mapping_error(card->pdev, buf)) {
-		dev_kfree_skb_any(descr->skb);
-		descr->skb = NULL;
-		if (netif_msg_rx_err(card) && net_ratelimit())
-			dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
-		card->spider_stats.rx_iommu_map_error++;
-		hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
-	} else {
-		hwdescr->buf_addr = buf;
-		wmb();
-		hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
-					 SPIDER_NET_DMAC_NOINTR_COMPLETE;
-	}
-
-	return 0;
-}
-
-/**
- * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
- * @card: card structure
- *
- * spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
- * chip by writing to the appropriate register. DMA is enabled in
- * spider_net_enable_rxdmac.
- */
-static inline void
-spider_net_enable_rxchtails(struct spider_net_card *card)
-{
-	/* assume chain is aligned correctly */
-	spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
-			     card->rx_chain.tail->bus_addr);
-}
-
-/**
- * spider_net_enable_rxdmac - enables a receive DMA controller
- * @card: card structure
- *
- * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
- * in the GDADMACCNTR register
- */
-static inline void
-spider_net_enable_rxdmac(struct spider_net_card *card)
-{
-	wmb();
-	spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
-			     SPIDER_NET_DMA_RX_VALUE);
-}
-
-/**
- * spider_net_disable_rxdmac - disables the receive DMA controller
- * @card: card structure
- *
- * spider_net_disable_rxdmac terminates processing on the DMA controller
- * by turing off the DMA controller, with the force-end flag set.
- */
-static inline void
-spider_net_disable_rxdmac(struct spider_net_card *card)
-{
-	spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
-			     SPIDER_NET_DMA_RX_FEND_VALUE);
-}
-
-/**
- * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
- * @card: card structure
- *
- * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
- */
-static void
-spider_net_refill_rx_chain(struct spider_net_card *card)
-{
-	struct spider_net_descr_chain *chain = &card->rx_chain;
-	unsigned long flags;
-
-	/* one context doing the refill (and a second context seeing that
-	 * and omitting it) is ok. If called by NAPI, we'll be called again
-	 * as spider_net_decode_one_descr is called several times. If some
-	 * interrupt calls us, the NAPI is about to clean up anyway. */
-	if (!spin_trylock_irqsave(&chain->lock, flags))
-		return;
-
-	while (spider_net_get_descr_status(chain->head->hwdescr) ==
-			SPIDER_NET_DESCR_NOT_IN_USE) {
-		if (spider_net_prepare_rx_descr(card, chain->head))
-			break;
-		chain->head = chain->head->next;
-	}
-
-	spin_unlock_irqrestore(&chain->lock, flags);
-}
-
-/**
- * spider_net_alloc_rx_skbs - Allocates rx skbs in rx descriptor chains
- * @card: card structure
- *
- * Returns 0 on success, <0 on failure.
- */
-static int
-spider_net_alloc_rx_skbs(struct spider_net_card *card)
-{
-	struct spider_net_descr_chain *chain = &card->rx_chain;
-	struct spider_net_descr *start = chain->tail;
-	struct spider_net_descr *descr = start;
-
-	/* Link up the hardware chain pointers */
-	do {
-		descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
-		descr = descr->next;
-	} while (descr != start);
-
-	/* Put at least one buffer into the chain. if this fails,
-	 * we've got a problem. If not, spider_net_refill_rx_chain
-	 * will do the rest at the end of this function. */
-	if (spider_net_prepare_rx_descr(card, chain->head))
-		goto error;
-	else
-		chain->head = chain->head->next;
-
-	/* This will allocate the rest of the rx buffers;
-	 * if not, it's business as usual later on. */
-	spider_net_refill_rx_chain(card);
-	spider_net_enable_rxdmac(card);
-	return 0;
-
-error:
-	spider_net_free_rx_chain_contents(card);
-	return -ENOMEM;
-}
-
-/**
- * spider_net_get_multicast_hash - generates hash for multicast filter table
- * @addr: multicast address
- *
- * returns the hash value.
- *
- * spider_net_get_multicast_hash calculates a hash value for a given multicast
- * address, that is used to set the multicast filter tables
- */
-static u8
-spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
-{
-	u32 crc;
-	u8 hash;
-	char addr_for_crc[ETH_ALEN] = { 0, };
-	int i, bit;
-
-	for (i = 0; i < ETH_ALEN * 8; i++) {
-		bit = (addr[i / 8] >> (i % 8)) & 1;
-		addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
-	}
-
-	crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
-
-	hash = (crc >> 27);
-	hash <<= 3;
-	hash |= crc & 7;
-	hash &= 0xff;
-
-	return hash;
-}
-
-/**
- * spider_net_set_multi - sets multicast addresses and promisc flags
- * @netdev: interface device structure
- *
- * spider_net_set_multi configures multicast addresses as needed for the
- * netdev interface. It also sets up multicast, allmulti and promisc
- * flags appropriately
- */
-static void
-spider_net_set_multi(struct net_device *netdev)
-{
-	struct netdev_hw_addr *ha;
-	u8 hash;
-	int i;
-	u32 reg;
-	struct spider_net_card *card = netdev_priv(netdev);
-	unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
-		{0, };
-
-	spider_net_set_promisc(card);
-
-	if (netdev->flags & IFF_ALLMULTI) {
-		for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
-			set_bit(i, bitmask);
-		}
-		goto write_hash;
-	}
-
-	/* well, we know, what the broadcast hash value is: it's xfd
-	hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
-	set_bit(0xfd, bitmask);
-
-	netdev_for_each_mc_addr(ha, netdev) {
-		hash = spider_net_get_multicast_hash(netdev, ha->addr);
-		set_bit(hash, bitmask);
-	}
-
-write_hash:
-	for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
-		reg = 0;
-		if (test_bit(i * 4, bitmask))
-			reg += 0x08;
-		reg <<= 8;
-		if (test_bit(i * 4 + 1, bitmask))
-			reg += 0x08;
-		reg <<= 8;
-		if (test_bit(i * 4 + 2, bitmask))
-			reg += 0x08;
-		reg <<= 8;
-		if (test_bit(i * 4 + 3, bitmask))
-			reg += 0x08;
-
-		spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
-	}
-}
-
-/**
- * spider_net_prepare_tx_descr - fill tx descriptor with skb data
- * @card: card structure
- * @skb: packet to use
- *
- * returns 0 on success, <0 on failure.
- *
- * fills out the descriptor structure with skb data and len. Copies data,
- * if needed (32bit DMA!)
- */
-static int
-spider_net_prepare_tx_descr(struct spider_net_card *card,
-			    struct sk_buff *skb)
-{
-	struct spider_net_descr_chain *chain = &card->tx_chain;
-	struct spider_net_descr *descr;
-	struct spider_net_hw_descr *hwdescr;
-	dma_addr_t buf;
-	unsigned long flags;
-
-	buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
-	if (pci_dma_mapping_error(card->pdev, buf)) {
-		if (netif_msg_tx_err(card) && net_ratelimit())
-			dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
-				  "Dropping packet\n", skb->data, skb->len);
-		card->spider_stats.tx_iommu_map_error++;
-		return -ENOMEM;
-	}
-
-	spin_lock_irqsave(&chain->lock, flags);
-	descr = card->tx_chain.head;
-	if (descr->next == chain->tail->prev) {
-		spin_unlock_irqrestore(&chain->lock, flags);
-		pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
-		return -ENOMEM;
-	}
-	hwdescr = descr->hwdescr;
-	chain->head = descr->next;
-
-	descr->skb = skb;
-	hwdescr->buf_addr = buf;
-	hwdescr->buf_size = skb->len;
-	hwdescr->next_descr_addr = 0;
-	hwdescr->data_status = 0;
-
-	hwdescr->dmac_cmd_status =
-			SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
-	spin_unlock_irqrestore(&chain->lock, flags);
-
-	if (skb->ip_summed == CHECKSUM_PARTIAL)
-		switch (ip_hdr(skb)->protocol) {
-		case IPPROTO_TCP:
-			hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
-			break;
-		case IPPROTO_UDP:
-			hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
-			break;
-		}
-
-	/* Chain the bus address, so that the DMA engine finds this descr. */
-	wmb();
-	descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
-
-	card->netdev->trans_start = jiffies; /* set netdev watchdog timer */
-	return 0;
-}
-
-static int
-spider_net_set_low_watermark(struct spider_net_card *card)
-{
-	struct spider_net_descr *descr = card->tx_chain.tail;
-	struct spider_net_hw_descr *hwdescr;
-	unsigned long flags;
-	int status;
-	int cnt=0;
-	int i;
-
-	/* Measure the length of the queue. Measurement does not
-	 * need to be precise -- does not need a lock. */
-	while (descr != card->tx_chain.head) {
-		status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
-		if (status == SPIDER_NET_DESCR_NOT_IN_USE)
-			break;
-		descr = descr->next;
-		cnt++;
-	}
-
-	/* If TX queue is short, don't even bother with interrupts */
-	if (cnt < card->tx_chain.num_desc/4)
-		return cnt;
-
-	/* Set low-watermark 3/4th's of the way into the queue. */
-	descr = card->tx_chain.tail;
-	cnt = (cnt*3)/4;
-	for (i=0;i<cnt; i++)
-		descr = descr->next;
-
-	/* Set the new watermark, clear the old watermark */
-	spin_lock_irqsave(&card->tx_chain.lock, flags);
-	descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
-	if (card->low_watermark && card->low_watermark != descr) {
-		hwdescr = card->low_watermark->hwdescr;
-		hwdescr->dmac_cmd_status =
-		     hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
-	}
-	card->low_watermark = descr;
-	spin_unlock_irqrestore(&card->tx_chain.lock, flags);
-	return cnt;
-}
-
-/**
- * spider_net_release_tx_chain - processes sent tx descriptors
- * @card: adapter structure
- * @brutal: if set, don't care about whether descriptor seems to be in use
- *
- * returns 0 if the tx ring is empty, otherwise 1.
- *
- * spider_net_release_tx_chain releases the tx descriptors that spider has
- * finished with (if non-brutal) or simply release tx descriptors (if brutal).
- * If some other context is calling this function, we return 1 so that we're
- * scheduled again (if we were scheduled) and will not lose initiative.
- */
-static int
-spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
-{
-	struct net_device *dev = card->netdev;
-	struct spider_net_descr_chain *chain = &card->tx_chain;
-	struct spider_net_descr *descr;
-	struct spider_net_hw_descr *hwdescr;
-	struct sk_buff *skb;
-	u32 buf_addr;
-	unsigned long flags;
-	int status;
-
-	while (1) {
-		spin_lock_irqsave(&chain->lock, flags);
-		if (chain->tail == chain->head) {
-			spin_unlock_irqrestore(&chain->lock, flags);
-			return 0;
-		}
-		descr = chain->tail;
-		hwdescr = descr->hwdescr;
-
-		status = spider_net_get_descr_status(hwdescr);
-		switch (status) {
-		case SPIDER_NET_DESCR_COMPLETE:
-			dev->stats.tx_packets++;
-			dev->stats.tx_bytes += descr->skb->len;
-			break;
-
-		case SPIDER_NET_DESCR_CARDOWNED:
-			if (!brutal) {
-				spin_unlock_irqrestore(&chain->lock, flags);
-				return 1;
-			}
-
-			/* fallthrough, if we release the descriptors
-			 * brutally (then we don't care about
-			 * SPIDER_NET_DESCR_CARDOWNED) */
-
-		case SPIDER_NET_DESCR_RESPONSE_ERROR:
-		case SPIDER_NET_DESCR_PROTECTION_ERROR:
-		case SPIDER_NET_DESCR_FORCE_END:
-			if (netif_msg_tx_err(card))
-				dev_err(&card->netdev->dev, "forcing end of tx descriptor "
-				       "with status x%02x\n", status);
-			dev->stats.tx_errors++;
-			break;
-
-		default:
-			dev->stats.tx_dropped++;
-			if (!brutal) {
-				spin_unlock_irqrestore(&chain->lock, flags);
-				return 1;
-			}
-		}
-
-		chain->tail = descr->next;
-		hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
-		skb = descr->skb;
-		descr->skb = NULL;
-		buf_addr = hwdescr->buf_addr;
-		spin_unlock_irqrestore(&chain->lock, flags);
-
-		/* unmap the skb */
-		if (skb) {
-			pci_unmap_single(card->pdev, buf_addr, skb->len,
-					PCI_DMA_TODEVICE);
-			dev_kfree_skb(skb);
-		}
-	}
-	return 0;
-}
-
-/**
- * spider_net_kick_tx_dma - enables TX DMA processing
- * @card: card structure
- *
- * This routine will start the transmit DMA running if
- * it is not already running. This routine ned only be
- * called when queueing a new packet to an empty tx queue.
- * Writes the current tx chain head as start address
- * of the tx descriptor chain and enables the transmission
- * DMA engine.
- */
-static inline void
-spider_net_kick_tx_dma(struct spider_net_card *card)
-{
-	struct spider_net_descr *descr;
-
-	if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
-			SPIDER_NET_TX_DMA_EN)
-		goto out;
-
-	descr = card->tx_chain.tail;
-	for (;;) {
-		if (spider_net_get_descr_status(descr->hwdescr) ==
-				SPIDER_NET_DESCR_CARDOWNED) {
-			spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
-					descr->bus_addr);
-			spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
-					SPIDER_NET_DMA_TX_VALUE);
-			break;
-		}
-		if (descr == card->tx_chain.head)
-			break;
-		descr = descr->next;
-	}
-
-out:
-	mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
-}
-
-/**
- * spider_net_xmit - transmits a frame over the device
- * @skb: packet to send out
- * @netdev: interface device structure
- *
- * returns 0 on success, !0 on failure
- */
-static int
-spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
-{
-	int cnt;
-	struct spider_net_card *card = netdev_priv(netdev);
-
-	spider_net_release_tx_chain(card, 0);
-
-	if (spider_net_prepare_tx_descr(card, skb) != 0) {
-		netdev->stats.tx_dropped++;
-		netif_stop_queue(netdev);
-		return NETDEV_TX_BUSY;
-	}
-
-	cnt = spider_net_set_low_watermark(card);
-	if (cnt < 5)
-		spider_net_kick_tx_dma(card);
-	return NETDEV_TX_OK;
-}
-
-/**
- * spider_net_cleanup_tx_ring - cleans up the TX ring
- * @card: card structure
- *
- * spider_net_cleanup_tx_ring is called by either the tx_timer
- * or from the NAPI polling routine.
- * This routine releases resources associted with transmitted
- * packets, including updating the queue tail pointer.
- */
-static void
-spider_net_cleanup_tx_ring(struct spider_net_card *card)
-{
-	if ((spider_net_release_tx_chain(card, 0) != 0) &&
-	    (card->netdev->flags & IFF_UP)) {
-		spider_net_kick_tx_dma(card);
-		netif_wake_queue(card->netdev);
-	}
-}
-
-/**
- * spider_net_do_ioctl - called for device ioctls
- * @netdev: interface device structure
- * @ifr: request parameter structure for ioctl
- * @cmd: command code for ioctl
- *
- * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
- * -EOPNOTSUPP is returned, if an unknown ioctl was requested
- */
-static int
-spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
-{
-	switch (cmd) {
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
-/**
- * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
- * @descr: descriptor to process
- * @card: card structure
- *
- * Fills out skb structure and passes the data to the stack.
- * The descriptor state is not changed.
- */
-static void
-spider_net_pass_skb_up(struct spider_net_descr *descr,
-		       struct spider_net_card *card)
-{
-	struct spider_net_hw_descr *hwdescr = descr->hwdescr;
-	struct sk_buff *skb = descr->skb;
-	struct net_device *netdev = card->netdev;
-	u32 data_status = hwdescr->data_status;
-	u32 data_error = hwdescr->data_error;
-
-	skb_put(skb, hwdescr->valid_size);
-
-	/* the card seems to add 2 bytes of junk in front
-	 * of the ethernet frame */
-#define SPIDER_MISALIGN		2
-	skb_pull(skb, SPIDER_MISALIGN);
-	skb->protocol = eth_type_trans(skb, netdev);
-
-	/* checksum offload */
-	skb_checksum_none_assert(skb);
-	if (netdev->features & NETIF_F_RXCSUM) {
-		if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
-		       SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
-		     !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
-			skb->ip_summed = CHECKSUM_UNNECESSARY;
-	}
-
-	if (data_status & SPIDER_NET_VLAN_PACKET) {
-		/* further enhancements: HW-accel VLAN */
-	}
-
-	/* update netdevice statistics */
-	netdev->stats.rx_packets++;
-	netdev->stats.rx_bytes += skb->len;
-
-	/* pass skb up to stack */
-	netif_receive_skb(skb);
-}
-
-static void show_rx_chain(struct spider_net_card *card)
-{
-	struct spider_net_descr_chain *chain = &card->rx_chain;
-	struct spider_net_descr *start= chain->tail;
-	struct spider_net_descr *descr= start;
-	struct spider_net_hw_descr *hwd = start->hwdescr;
-	struct device *dev = &card->netdev->dev;
-	u32 curr_desc, next_desc;
-	int status;
-
-	int tot = 0;
-	int cnt = 0;
-	int off = start - chain->ring;
-	int cstat = hwd->dmac_cmd_status;
-
-	dev_info(dev, "Total number of descrs=%d\n",
-		chain->num_desc);
-	dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
-		off, cstat);
-
-	curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
-	next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
-
-	status = cstat;
-	do
-	{
-		hwd = descr->hwdescr;
-		off = descr - chain->ring;
-		status = hwd->dmac_cmd_status;
-
-		if (descr == chain->head)
-			dev_info(dev, "Chain head is at %d, head status=0x%x\n",
-			         off, status);
-
-		if (curr_desc == descr->bus_addr)
-			dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
-			         off, status);
-
-		if (next_desc == descr->bus_addr)
-			dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
-			         off, status);
-
-		if (hwd->next_descr_addr == 0)
-			dev_info(dev, "chain is cut at %d\n", off);
-
-		if (cstat != status) {
-			int from = (chain->num_desc + off - cnt) % chain->num_desc;
-			int to = (chain->num_desc + off - 1) % chain->num_desc;
-			dev_info(dev, "Have %d (from %d to %d) descrs "
-			         "with stat=0x%08x\n", cnt, from, to, cstat);
-			cstat = status;
-			cnt = 0;
-		}
-
-		cnt ++;
-		tot ++;
-		descr = descr->next;
-	} while (descr != start);
-
-	dev_info(dev, "Last %d descrs with stat=0x%08x "
-	         "for a total of %d descrs\n", cnt, cstat, tot);
-
-#ifdef DEBUG
-	/* Now dump the whole ring */
-	descr = start;
-	do
-	{
-		struct spider_net_hw_descr *hwd = descr->hwdescr;
-		status = spider_net_get_descr_status(hwd);
-		cnt = descr - chain->ring;
-		dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
-		         cnt, status, descr->skb);
-		dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
-		         descr->bus_addr, hwd->buf_addr, hwd->buf_size);
-		dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
-		         hwd->next_descr_addr, hwd->result_size,
-		         hwd->valid_size);
-		dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
-		         hwd->dmac_cmd_status, hwd->data_status,
-		         hwd->data_error);
-		dev_info(dev, "\n");
-
-		descr = descr->next;
-	} while (descr != start);
-#endif
-
-}
-
-/**
- * spider_net_resync_head_ptr - Advance head ptr past empty descrs
- *
- * If the driver fails to keep up and empty the queue, then the
- * hardware wil run out of room to put incoming packets. This
- * will cause the hardware to skip descrs that are full (instead
- * of halting/retrying). Thus, once the driver runs, it wil need
-