Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2074 insertions, 0 deletions

diff --git a/drivers/net/ethernet/adaptec/starfire.c b/drivers/net/ethernet/adaptec/starfire.c
new file mode 100644
index 0000000000..857361c74f
--- /dev/null
+++ b/drivers/net/ethernet/adaptec/starfire.c
@@ -0,0 +1,2074 @@
+/* starfire.c: Linux device driver for the Adaptec Starfire network adapter. */
+/*
+	Written 1998-2000 by Donald Becker.
+
+	Current maintainer is Ion Badulescu <ionut ta badula tod org>. Please
+	send all bug reports to me, and not to Donald Becker, as this code
+	has been heavily modified from Donald's original version.
+
+	This software may be used and distributed according to the terms of
+	the GNU General Public License (GPL), incorporated herein by reference.
+	Drivers based on or derived from this code fall under the GPL and must
+	retain the authorship, copyright and license notice.  This file is not
+	a complete program and may only be used when the entire operating
+	system is licensed under the GPL.
+
+	The information below comes from Donald Becker's original driver:
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+	Support and updates available at
+	http://www.scyld.com/network/starfire.html
+	[link no longer provides useful info -jgarzik]
+
+*/
+
+#define DRV_NAME	"starfire"
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/crc32.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/if_vlan.h>
+#include <linux/mm.h>
+#include <linux/firmware.h>
+#include <asm/processor.h>		/* Processor type for cache alignment. */
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+/*
+ * The current frame processor firmware fails to checksum a fragment
+ * of length 1. If and when this is fixed, the #define below can be removed.
+ */
+#define HAS_BROKEN_FIRMWARE
+
+/*
+ * If using the broken firmware, data must be padded to the next 32-bit boundary.
+ */
+#ifdef HAS_BROKEN_FIRMWARE
+#define PADDING_MASK 3
+#endif
+
+/*
+ * Define this if using the driver with the zero-copy patch
+ */
+#define ZEROCOPY
+
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+#define VLAN_SUPPORT
+#endif
+
+/* The user-configurable values.
+   These may be modified when a driver module is loaded.*/
+
+/* Used for tuning interrupt latency vs. overhead. */
+static int intr_latency;
+static int small_frames;
+
+static int debug = 1;			/* 1 normal messages, 0 quiet .. 7 verbose. */
+static int max_interrupt_work = 20;
+static int mtu;
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
+   The Starfire has a 512 element hash table based on the Ethernet CRC. */
+static const int multicast_filter_limit = 512;
+/* Whether to do TCP/UDP checksums in hardware */
+static int enable_hw_cksum = 1;
+
+#define PKT_BUF_SZ	1536		/* Size of each temporary Rx buffer.*/
+/*
+ * Set the copy breakpoint for the copy-only-tiny-frames scheme.
+ * Setting to > 1518 effectively disables this feature.
+ *
+ * NOTE:
+ * The ia64 doesn't allow for unaligned loads even of integers being
+ * misaligned on a 2 byte boundary. Thus always force copying of
+ * packets as the starfire doesn't allow for misaligned DMAs ;-(
+ * 23/10/2000 - Jes
+ *
+ * The Alpha and the Sparc don't like unaligned loads, either. On Sparc64,
+ * at least, having unaligned frames leads to a rather serious performance
+ * penalty. -Ion
+ */
+#if defined(__ia64__) || defined(__alpha__) || defined(__sparc__)
+static int rx_copybreak = PKT_BUF_SZ;
+#else
+static int rx_copybreak /* = 0 */;
+#endif
+
+/* PCI DMA burst size -- on sparc64 we want to force it to 64 bytes, on the others the default of 128 is fine. */
+#ifdef __sparc__
+#define DMA_BURST_SIZE 64
+#else
+#define DMA_BURST_SIZE 128
+#endif
+
+/* Operational parameters that are set at compile time. */
+
+/* The "native" ring sizes are either 256 or 2048.
+   However in some modes a descriptor may be marked to wrap the ring earlier.
+*/
+#define RX_RING_SIZE	256
+#define TX_RING_SIZE	32
+/* The completion queues are fixed at 1024 entries i.e. 4K or 8KB. */
+#define DONE_Q_SIZE	1024
+/* All queues must be aligned on a 256-byte boundary */
+#define QUEUE_ALIGN	256
+
+#if RX_RING_SIZE > 256
+#define RX_Q_ENTRIES Rx2048QEntries
+#else
+#define RX_Q_ENTRIES Rx256QEntries
+#endif
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT	(2 * HZ)
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+/* 64-bit dma_addr_t */
+#define ADDR_64BITS	/* This chip uses 64 bit addresses. */
+#define netdrv_addr_t __le64
+#define cpu_to_dma(x) cpu_to_le64(x)
+#define dma_to_cpu(x) le64_to_cpu(x)
+#define RX_DESC_Q_ADDR_SIZE RxDescQAddr64bit
+#define TX_DESC_Q_ADDR_SIZE TxDescQAddr64bit
+#define RX_COMPL_Q_ADDR_SIZE RxComplQAddr64bit
+#define TX_COMPL_Q_ADDR_SIZE TxComplQAddr64bit
+#define RX_DESC_ADDR_SIZE RxDescAddr64bit
+#else  /* 32-bit dma_addr_t */
+#define netdrv_addr_t __le32
+#define cpu_to_dma(x) cpu_to_le32(x)
+#define dma_to_cpu(x) le32_to_cpu(x)
+#define RX_DESC_Q_ADDR_SIZE RxDescQAddr32bit
+#define TX_DESC_Q_ADDR_SIZE TxDescQAddr32bit
+#define RX_COMPL_Q_ADDR_SIZE RxComplQAddr32bit
+#define TX_COMPL_Q_ADDR_SIZE TxComplQAddr32bit
+#define RX_DESC_ADDR_SIZE RxDescAddr32bit
+#endif
+
+#define skb_first_frag_len(skb)	skb_headlen(skb)
+#define skb_num_frags(skb) (skb_shinfo(skb)->nr_frags + 1)
+
+/* Firmware names */
+#define FIRMWARE_RX	"adaptec/starfire_rx.bin"
+#define FIRMWARE_TX	"adaptec/starfire_tx.bin"
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("Adaptec Starfire Ethernet driver");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(FIRMWARE_RX);
+MODULE_FIRMWARE(FIRMWARE_TX);
+
+module_param(max_interrupt_work, int, 0);
+module_param(mtu, int, 0);
+module_param(debug, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param(intr_latency, int, 0);
+module_param(small_frames, int, 0);
+module_param(enable_hw_cksum, int, 0);
+MODULE_PARM_DESC(max_interrupt_work, "Maximum events handled per interrupt");
+MODULE_PARM_DESC(mtu, "MTU (all boards)");
+MODULE_PARM_DESC(debug, "Debug level (0-6)");
+MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(intr_latency, "Maximum interrupt latency, in microseconds");
+MODULE_PARM_DESC(small_frames, "Maximum size of receive frames that bypass interrupt latency (0,64,128,256,512)");
+MODULE_PARM_DESC(enable_hw_cksum, "Enable/disable hardware cksum support (0/1)");
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This driver is for the Adaptec 6915 "Starfire" 64 bit PCI Ethernet adapter.
+
+II. Board-specific settings
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+The Starfire hardware uses multiple fixed-size descriptor queues/rings.  The
+ring sizes are set fixed by the hardware, but may optionally be wrapped
+earlier by the END bit in the descriptor.
+This driver uses that hardware queue size for the Rx ring, where a large
+number of entries has no ill effect beyond increases the potential backlog.
+The Tx ring is wrapped with the END bit, since a large hardware Tx queue
+disables the queue layer priority ordering and we have no mechanism to
+utilize the hardware two-level priority queue.  When modifying the
+RX/TX_RING_SIZE pay close attention to page sizes and the ring-empty warning
+levels.
+
+IIIb/c. Transmit/Receive Structure
+
+See the Adaptec manual for the many possible structures, and options for
+each structure.  There are far too many to document all of them here.
+
+For transmit this driver uses type 0/1 transmit descriptors (depending
+on the 32/64 bitness of the architecture), and relies on automatic
+minimum-length padding.  It does not use the completion queue
+consumer index, but instead checks for non-zero status entries.
+
+For receive this driver uses type 2/3 receive descriptors.  The driver
+allocates full frame size skbuffs for the Rx ring buffers, so all frames
+should fit in a single descriptor.  The driver does not use the completion
+queue consumer index, but instead checks for non-zero status entries.
+
+When an incoming frame is less than RX_COPYBREAK bytes long, a fresh skbuff
+is allocated and the frame is copied to the new skbuff.  When the incoming
+frame is larger, the skbuff is passed directly up the protocol stack.
+Buffers consumed this way are replaced by newly allocated skbuffs in a later
+phase of receive.
+
+A notable aspect of operation is that unaligned buffers are not permitted by
+the Starfire hardware.  Thus the IP header at offset 14 in an ethernet frame
+isn't longword aligned, which may cause problems on some machine
+e.g. Alphas and IA64. For these architectures, the driver is forced to copy
+the frame into a new skbuff unconditionally. Copied frames are put into the
+skbuff at an offset of "+2", thus 16-byte aligning the IP header.
+
+IIId. Synchronization
+
+The driver runs as two independent, single-threaded flows of control.  One
+is the send-packet routine, which enforces single-threaded use by the
+dev->tbusy flag.  The other thread is the interrupt handler, which is single
+threaded by the hardware and interrupt handling software.
+
+The send packet thread has partial control over the Tx ring and the netif_queue
+status. If the number of free Tx slots in the ring falls below a certain number
+(currently hardcoded to 4), it signals the upper layer to stop the queue.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. Iff the netif_queue is stopped and the
+number of free Tx slow is above the threshold, it signals the upper layer to
+restart the queue.
+
+IV. Notes
+
+IVb. References
+
+The Adaptec Starfire manuals, available only from Adaptec.
+http://www.scyld.com/expert/100mbps.html
+http://www.scyld.com/expert/NWay.html
+
+IVc. Errata
+
+- StopOnPerr is broken, don't enable
+- Hardware ethernet padding exposes random data, perform software padding
+  instead (unverified -- works correctly for all the hardware I have)
+
+*/
+
+
+
+enum chip_capability_flags {CanHaveMII=1, };
+
+enum chipset {
+	CH_6915 = 0,
+};
+
+static const struct pci_device_id starfire_pci_tbl[] = {
+	{ PCI_VDEVICE(ADAPTEC, 0x6915), CH_6915 },
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, starfire_pci_tbl);
+
+/* A chip capabilities table, matching the CH_xxx entries in xxx_pci_tbl[] above. */
+static const struct chip_info {
+	const char *name;
+	int drv_flags;
+} netdrv_tbl[] = {
+	{ "Adaptec Starfire 6915", CanHaveMII },
+};
+
+
+/* Offsets to the device registers.
+   Unlike software-only systems, device drivers interact with complex hardware.
+   It's not useful to define symbolic names for every register bit in the
+   device.  The name can only partially document the semantics and make
+   the driver longer and more difficult to read.
+   In general, only the important configuration values or bits changed
+   multiple times should be defined symbolically.
+*/
+enum register_offsets {
+	PCIDeviceConfig=0x50040, GenCtrl=0x50070, IntrTimerCtrl=0x50074,
+	IntrClear=0x50080, IntrStatus=0x50084, IntrEnable=0x50088,
+	MIICtrl=0x52000, TxStationAddr=0x50120, EEPROMCtrl=0x51000,
+	GPIOCtrl=0x5008C, TxDescCtrl=0x50090,
+	TxRingPtr=0x50098, HiPriTxRingPtr=0x50094, /* Low and High priority. */
+	TxRingHiAddr=0x5009C,		/* 64 bit address extension. */
+	TxProducerIdx=0x500A0, TxConsumerIdx=0x500A4,
+	TxThreshold=0x500B0,
+	CompletionHiAddr=0x500B4, TxCompletionAddr=0x500B8,
+	RxCompletionAddr=0x500BC, RxCompletionQ2Addr=0x500C0,
+	CompletionQConsumerIdx=0x500C4, RxDMACtrl=0x500D0,
+	RxDescQCtrl=0x500D4, RxDescQHiAddr=0x500DC, RxDescQAddr=0x500E0,
+	RxDescQIdx=0x500E8, RxDMAStatus=0x500F0, RxFilterMode=0x500F4,
+	TxMode=0x55000, VlanType=0x55064,
+	PerfFilterTable=0x56000, HashTable=0x56100,
+	TxGfpMem=0x58000, RxGfpMem=0x5a000,
+};
+
+/*
+ * Bits in the interrupt status/mask registers.
+ * Warning: setting Intr[Ab]NormalSummary in the IntrEnable register
+ * enables all the interrupt sources that are or'ed into those status bits.
+ */
+enum intr_status_bits {
+	IntrLinkChange=0xf0000000, IntrStatsMax=0x08000000,
+	IntrAbnormalSummary=0x02000000, IntrGeneralTimer=0x01000000,
+	IntrSoftware=0x800000, IntrRxComplQ1Low=0x400000,
+	IntrTxComplQLow=0x200000, IntrPCI=0x100000,
+	IntrDMAErr=0x080000, IntrTxDataLow=0x040000,
+	IntrRxComplQ2Low=0x020000, IntrRxDescQ1Low=0x010000,
+	IntrNormalSummary=0x8000, IntrTxDone=0x4000,
+	IntrTxDMADone=0x2000, IntrTxEmpty=0x1000,
+	IntrEarlyRxQ2=0x0800, IntrEarlyRxQ1=0x0400,
+	IntrRxQ2Done=0x0200, IntrRxQ1Done=0x0100,
+	IntrRxGFPDead=0x80, IntrRxDescQ2Low=0x40,
+	IntrNoTxCsum=0x20, IntrTxBadID=0x10,
+	IntrHiPriTxBadID=0x08, IntrRxGfp=0x04,
+	IntrTxGfp=0x02, IntrPCIPad=0x01,
+	/* not quite bits */
+	IntrRxDone=IntrRxQ2Done | IntrRxQ1Done,
+	IntrRxEmpty=IntrRxDescQ1Low | IntrRxDescQ2Low,
+	IntrNormalMask=0xff00, IntrAbnormalMask=0x3ff00fe,
+};
+
+/* Bits in the RxFilterMode register. */
+enum rx_mode_bits {
+	AcceptBroadcast=0x04, AcceptAllMulticast=0x02, AcceptAll=0x01,
+	AcceptMulticast=0x10, PerfectFilter=0x40, HashFilter=0x30,
+	PerfectFilterVlan=0x80, MinVLANPrio=0xE000, VlanMode=0x0200,
+	WakeupOnGFP=0x0800,
+};
+
+/* Bits in the TxMode register */
+enum tx_mode_bits {
+	MiiSoftReset=0x8000, MIILoopback=0x4000,
+	TxFlowEnable=0x0800, RxFlowEnable=0x0400,
+	PadEnable=0x04, FullDuplex=0x02, HugeFrame=0x01,
+};
+
+/* Bits in the TxDescCtrl register. */
+enum tx_ctrl_bits {
+	TxDescSpaceUnlim=0x00, TxDescSpace32=0x10, TxDescSpace64=0x20,
+	TxDescSpace128=0x30, TxDescSpace256=0x40,
+	TxDescType0=0x00, TxDescType1=0x01, TxDescType2=0x02,
+	TxDescType3=0x03, TxDescType4=0x04,
+	TxNoDMACompletion=0x08,
+	TxDescQAddr64bit=0x80, TxDescQAddr32bit=0,
+	TxHiPriFIFOThreshShift=24, TxPadLenShift=16,
+	TxDMABurstSizeShift=8,
+};
+
+/* Bits in the RxDescQCtrl register. */
+enum rx_ctrl_bits {
+	RxBufferLenShift=16, RxMinDescrThreshShift=0,
+	RxPrefetchMode=0x8000, RxVariableQ=0x2000,
+	Rx2048QEntries=0x4000, Rx256QEntries=0,
+	RxDescAddr64bit=0x1000, RxDescAddr32bit=0,
+	RxDescQAddr64bit=0x0100, RxDescQAddr32bit=0,
+	RxDescSpace4=0x000, RxDescSpace8=0x100,
+	RxDescSpace16=0x200, RxDescSpace32=0x300,
+	RxDescSpace64=0x400, RxDescSpace128=0x500,
+	RxConsumerWrEn=0x80,
+};
+
+/* Bits in the RxDMACtrl register. */
+enum rx_dmactrl_bits {
+	RxReportBadFrames=0x80000000, RxDMAShortFrames=0x40000000,
+	RxDMABadFrames=0x20000000, RxDMACrcErrorFrames=0x10000000,
+	RxDMAControlFrame=0x08000000, RxDMAPauseFrame=0x04000000,
+	RxChecksumIgnore=0, RxChecksumRejectTCPUDP=0x02000000,
+	RxChecksumRejectTCPOnly=0x01000000,
+	RxCompletionQ2Enable=0x800000,
+	RxDMAQ2Disable=0, RxDMAQ2FPOnly=0x100000,
+	RxDMAQ2SmallPkt=0x200000, RxDMAQ2HighPrio=0x300000,
+	RxDMAQ2NonIP=0x400000,
+	RxUseBackupQueue=0x080000, RxDMACRC=0x040000,
+	RxEarlyIntThreshShift=12, RxHighPrioThreshShift=8,
+	RxBurstSizeShift=0,
+};
+
+/* Bits in the RxCompletionAddr register */
+enum rx_compl_bits {
+	RxComplQAddr64bit=0x80, RxComplQAddr32bit=0,
+	RxComplProducerWrEn=0x40,
+	RxComplType0=0x00, RxComplType1=0x10,
+	RxComplType2=0x20, RxComplType3=0x30,
+	RxComplThreshShift=0,
+};
+
+/* Bits in the TxCompletionAddr register */
+enum tx_compl_bits {
+	TxComplQAddr64bit=0x80, TxComplQAddr32bit=0,
+	TxComplProducerWrEn=0x40,
+	TxComplIntrStatus=0x20,
+	CommonQueueMode=0x10,
+	TxComplThreshShift=0,
+};
+
+/* Bits in the GenCtrl register */
+enum gen_ctrl_bits {
+	RxEnable=0x05, TxEnable=0x0a,
+	RxGFPEnable=0x10, TxGFPEnable=0x20,
+};
+
+/* Bits in the IntrTimerCtrl register */
+enum intr_ctrl_bits {
+	Timer10X=0x800, EnableIntrMasking=0x60, SmallFrameBypass=0x100,
+	SmallFrame64=0, SmallFrame128=0x200, SmallFrame256=0x400, SmallFrame512=0x600,
+	IntrLatencyMask=0x1f,
+};
+
+/* The Rx and Tx buffer descriptors. */
+struct starfire_rx_desc {
+	netdrv_addr_t rxaddr;
+};
+enum rx_desc_bits {
+	RxDescValid=1, RxDescEndRing=2,
+};
+
+/* Completion queue entry. */
+struct short_rx_done_desc {
+	__le32 status;			/* Low 16 bits is length. */
+};
+struct basic_rx_done_desc {
+	__le32 status;			/* Low 16 bits is length. */
+	__le16 vlanid;
+	__le16 status2;
+};
+struct csum_rx_done_desc {
+	__le32 status;			/* Low 16 bits is length. */
+	__le16 csum;			/* Partial checksum */
+	__le16 status2;
+};
+struct full_rx_done_desc {
+	__le32 status;			/* Low 16 bits is length. */
+	__le16 status3;
+	__le16 status2;
+	__le16 vlanid;
+	__le16 csum;			/* partial checksum */
+	__le32 timestamp;
+};
+/* XXX: this is ugly and I'm not sure it's worth the trouble -Ion */
+#ifdef VLAN_SUPPORT
+typedef struct full_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType3
+#else  /* not VLAN_SUPPORT */
+typedef struct csum_rx_done_desc rx_done_desc;
+#define RxComplType RxComplType2
+#endif /* not VLAN_SUPPORT */
+
+enum rx_done_bits {
+	RxOK=0x20000000, RxFIFOErr=0x10000000, RxBufQ2=0x08000000,
+};
+
+/* Type 1 Tx descriptor. */
+struct starfire_tx_desc_1 {
+	__le32 status;			/* Upper bits are status, lower 16 length. */
+	__le32 addr;
+};
+
+/* Type 2 Tx descriptor. */
+struct starfire_tx_desc_2 {
+	__le32 status;			/* Upper bits are status, lower 16 length. */
+	__le32 reserved;
+	__le64 addr;
+};
+
+#ifdef ADDR_64BITS
+typedef struct starfire_tx_desc_2 starfire_tx_desc;
+#define TX_DESC_TYPE TxDescType2
+#else  /* not ADDR_64BITS */
+typedef struct starfire_tx_desc_1 starfire_tx_desc;
+#define TX_DESC_TYPE TxDescType1
+#endif /* not ADDR_64BITS */
+#define TX_DESC_SPACING TxDescSpaceUnlim
+
+enum tx_desc_bits {
+	TxDescID=0xB0000000,
+	TxCRCEn=0x01000000, TxDescIntr=0x08000000,
+	TxRingWrap=0x04000000, TxCalTCP=0x02000000,
+};
+struct tx_done_desc {
+	__le32 status;			/* timestamp, index. */
+#if 0
+	__le32 intrstatus;		/* interrupt status */
+#endif
+};
+
+struct rx_ring_info {
+	struct sk_buff *skb;
+	dma_addr_t mapping;
+};
+struct tx_ring_info {
+	struct sk_buff *skb;
+	dma_addr_t mapping;
+	unsigned int used_slots;
+};
+
+#define PHY_CNT		2
+struct netdev_private {
+	/* Descriptor rings first for alignment. */
+	struct starfire_rx_desc *rx_ring;
+	starfire_tx_desc *tx_ring;
+	dma_addr_t rx_ring_dma;
+	dma_addr_t tx_ring_dma;
+	/* The addresses of rx/tx-in-place skbuffs. */
+	struct rx_ring_info rx_info[RX_RING_SIZE];
+	struct tx_ring_info tx_info[TX_RING_SIZE];
+	/* Pointers to completion queues (full pages). */
+	rx_done_desc *rx_done_q;
+	dma_addr_t rx_done_q_dma;
+	unsigned int rx_done;
+	struct tx_done_desc *tx_done_q;
+	dma_addr_t tx_done_q_dma;
+	unsigned int tx_done;
+	struct napi_struct napi;
+	struct net_device *dev;
+	struct pci_dev *pci_dev;
+#ifdef VLAN_SUPPORT
+	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+#endif
+	void *queue_mem;
+	dma_addr_t queue_mem_dma;
+	size_t queue_mem_size;
+
+	/* Frequently used values: keep some adjacent for cache effect. */
+	spinlock_t lock;
+	unsigned int cur_rx, dirty_rx;	/* Producer/consumer ring indices */
+	unsigned int cur_tx, dirty_tx, reap_tx;
+	unsigned int rx_buf_sz;		/* Based on MTU+slack. */
+	/* These values keep track of the transceiver/media in use. */
+	int speed100;			/* Set if speed == 100MBit. */
+	u32 tx_mode;
+	u32 intr_timer_ctrl;
+	u8 tx_threshold;
+	/* MII transceiver section. */
+	struct mii_if_info mii_if;		/* MII lib hooks/info */
+	int phy_cnt;			/* MII device addresses. */
+	unsigned char phys[PHY_CNT];	/* MII device addresses. */
+	void __iomem *base;
+};
+
+
+static int	mdio_read(struct net_device *dev, int phy_id, int location);
+static void	mdio_write(struct net_device *dev, int phy_id, int location, int value);
+static int	netdev_open(struct net_device *dev);
+static void	check_duplex(struct net_device *dev);
+static void	tx_timeout(struct net_device *dev, unsigned int txqueue);
+static void	init_ring(struct net_device *dev);
+static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t intr_handler(int irq, void *dev_instance);
+static void	netdev_error(struct net_device *dev, int intr_status);
+static int	__netdev_rx(struct net_device *dev, int *quota);
+static int	netdev_poll(struct napi_struct *napi, int budget);
+static void	refill_rx_ring(struct net_device *dev);
+static void	netdev_error(struct net_device *dev, int intr_status);
+static void	set_rx_mode(struct net_device *dev);
+static struct net_device_stats *get_stats(struct net_device *dev);
+static int	netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static int	netdev_close(struct net_device *dev);
+static void	netdev_media_change(struct net_device *dev);
+static const struct ethtool_ops ethtool_ops;
+
+
+#ifdef VLAN_SUPPORT
+static int netdev_vlan_rx_add_vid(struct net_device *dev,
+				  __be16 proto, u16 vid)
+{
+	struct netdev_private *np = netdev_priv(dev);
+
+	spin_lock(&np->lock);
+	if (debug > 1)
+		printk("%s: Adding vlanid %d to vlan filter\n", dev->name, vid);
+	set_bit(vid, np->active_vlans);
+	set_rx_mode(dev);
+	spin_unlock(&np->lock);
+
+	return 0;
+}
+
+static int netdev_vlan_rx_kill_vid(struct net_device *dev,
+				   __be16 proto, u16 vid)
+{
+	struct netdev_private *np = netdev_priv(dev);
+
+	spin_lock(&np->lock);
+	if (debug > 1)
+		printk("%s: removing vlanid %d from vlan filter\n", dev->name, vid);
+	clear_bit(vid, np->active_vlans);
+	set_rx_mode(dev);
+	spin_unlock(&np->lock);
+
+	return 0;
+}
+#endif /* VLAN_SUPPORT */
+
+
+static const struct net_device_ops netdev_ops = {
+	.ndo_open		= netdev_open,
+	.ndo_stop		= netdev_close,
+	.ndo_start_xmit		= start_tx,
+	.ndo_tx_timeout		= tx_timeout,
+	.ndo_get_stats		= get_stats,
+	.ndo_set_rx_mode	= set_rx_mode,
+	.ndo_eth_ioctl		= netdev_ioctl,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+#ifdef VLAN_SUPPORT
+	.ndo_vlan_rx_add_vid	= netdev_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	= netdev_vlan_rx_kill_vid,
+#endif
+};
+
+static int starfire_init_one(struct pci_dev *pdev,
+			     const struct pci_device_id *ent)
+{
+	struct device *d = &pdev->dev;
+	struct netdev_private *np;
+	int i, irq, chip_idx = ent->driver_data;
+	struct net_device *dev;
+	u8 addr[ETH_ALEN];
+	long ioaddr;
+	void __iomem *base;
+	int drv_flags, io_size;
+	int boguscnt;
+
+	if (pci_enable_device (pdev))
+		return -EIO;
+
+	ioaddr = pci_resource_start(pdev, 0);
+	io_size = pci_resource_len(pdev, 0);
+	if (!ioaddr || ((pci_resource_flags(pdev, 0) & IORESOURCE_MEM) == 0)) {
+		dev_err(d, "no PCI MEM resources, aborting\n");
+		return -ENODEV;
+	}
+
+	dev = alloc_etherdev(sizeof(*np));
+	if (!dev)
+		return -ENOMEM;
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	irq = pdev->irq;
+
+	if (pci_request_regions (pdev, DRV_NAME)) {
+		dev_err(d, "cannot reserve PCI resources, aborting\n");
+		goto err_out_free_netdev;
+	}
+
+	base = ioremap(ioaddr, io_size);
+	if (!base) {
+		dev_err(d, "cannot remap %#x @ %#lx, aborting\n",
+			io_size, ioaddr);
+		goto err_out_free_res;
+	}
+
+	pci_set_master(pdev);
+
+	/* enable MWI -- it vastly improves Rx performance on sparc64 */
+	pci_try_set_mwi(pdev);
+
+#ifdef ZEROCOPY
+	/* Starfire can do TCP/UDP checksumming */
+	if (enable_hw_cksum)
+		dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
+#endif /* ZEROCOPY */
+
+#ifdef VLAN_SUPPORT
+	dev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER;
+#endif /* VLAN_RX_KILL_VID */
+#ifdef ADDR_64BITS
+	dev->features |= NETIF_F_HIGHDMA;
+#endif /* ADDR_64BITS */
+
+	/* Serial EEPROM reads are hidden by the hardware. */
+	for (i = 0; i < 6; i++)
+		addr[i] = readb(base + EEPROMCtrl + 20 - i);
+	eth_hw_addr_set(dev, addr);
+
+#if ! defined(final_version) /* Dump the EEPROM contents during development. */
+	if (debug > 4)
+		for (i = 0; i < 0x20; i++)
+			printk("%2.2x%s",
+			       (unsigned int)readb(base + EEPROMCtrl + i),
+			       i % 16 != 15 ? " " : "\n");
+#endif
+
+	/* Issue soft reset */
+	writel(MiiSoftReset, base + TxMode);
+	udelay(1000);
+	writel(0, base + TxMode);
+
+	/* Reset the chip to erase previous misconfiguration. */
+	writel(1, base + PCIDeviceConfig);
+	boguscnt = 1000;
+	while (--boguscnt > 0) {
+		udelay(10);
+		if ((readl(base + PCIDeviceConfig) & 1) == 0)
+			break;
+	}
+	if (boguscnt == 0)
+		printk("%s: chipset reset never completed!\n", dev->name);
+	/* wait a little longer */
+	udelay(1000);
+
+	np = netdev_priv(dev);
+	np->dev = dev;
+	np->base = base;
+	spin_lock_init(&np->lock);
+	pci_set_drvdata(pdev, dev);
+
+	np->pci_dev = pdev;
+
+	np->mii_if.dev = dev;
+	np->mii_if.mdio_read = mdio_read;
+	np->mii_if.mdio_write = mdio_write;
+	np->mii_if.phy_id_mask = 0x1f;
+	np->mii_if.reg_num_mask = 0x1f;
+
+	drv_flags = netdrv_tbl[chip_idx].drv_flags;
+
+	np->speed100 = 1;
+
+	/* timer resolution is 128 * 0.8us */
+	np->intr_timer_ctrl = (((intr_latency * 10) / 1024) & IntrLatencyMask) |
+		Timer10X | EnableIntrMasking;
+
+	if (small_frames > 0) {
+		np->intr_timer_ctrl |= SmallFrameBypass;
+		switch (small_frames) {
+		case 1 ... 64:
+			np->intr_timer_ctrl |= SmallFrame64;
+			break;
+		case 65 ... 128:
+			np->intr_timer_ctrl |= SmallFrame128;
+			break;
+		case 129 ... 256:
+			np->intr_timer_ctrl |= SmallFrame256;
+			break;
+		default:
+			np->intr_timer_ctrl |= SmallFrame512;
+			if (small_frames > 512)
+				printk("Adjusting small_frames down to 512\n");
+			break;
+		}
+	}
+
+	dev->netdev_ops = &netdev_ops;
+	dev->watchdog_timeo = TX_TIMEOUT;
+	dev->ethtool_ops = &ethtool_ops;
+
+	netif_napi_add_weight(dev, &np->napi, netdev_poll, max_interrupt_work);
+
+	if (mtu)
+		dev->mtu = mtu;
+
+	if (register_netdev(dev))
+		goto err_out_cleardev;
+
+	printk(KERN_INFO "%s: %s at %p, %pM, IRQ %d.\n",
+	       dev->name, netdrv_tbl[chip_idx].name, base,
+	       dev->dev_addr, irq);
+
+	if (drv_flags & CanHaveMII) {
+		int phy, phy_idx = 0;
+		int mii_status;
+		for (phy = 0; phy < 32 && phy_idx < PHY_CNT; phy++) {
+			mdio_write(dev, phy, MII_BMCR, BMCR_RESET);
+			msleep(100);
+			boguscnt = 1000;
+			while (--boguscnt > 0)
+				if ((mdio_read(dev, phy, MII_BMCR) & BMCR_RESET) == 0)
+					break;
+			if (boguscnt == 0) {
+				printk("%s: PHY#%d reset never completed!\n", dev->name, phy);
+				continue;
+			}
+			mii_status = mdio_read(dev, phy, MII_BMSR);
+			if (mii_status != 0) {
+				np->phys[phy_idx++] = phy;
+				np->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
+				printk(KERN_INFO "%s: MII PHY found at address %d, status "
+					   "%#4.4x advertising %#4.4x.\n",
+					   dev->name, phy, mii_status, np->mii_if.advertising);
+				/* there can be only one PHY on-board */
+				break;
+			}
+		}
+		np->phy_cnt = phy_idx;
+		if (np->phy_cnt > 0)
+			np->mii_if.phy_id = np->phys[0];
+		else
+			memset(&np->mii_if, 0, sizeof(np->mii_if));
+	}
+
+	printk(KERN_INFO "%s: scatter-gather and hardware TCP cksumming %s.\n",
+	       dev->name, enable_hw_cksum ? "enabled" : "disabled");
+	return 0;
+
+err_out_cleardev:
+	iounmap(base);
+err_out_free_res:
+	pci_release_regions (pdev);
+err_out_free_netdev:
+	free_netdev(dev);
+	return -ENODEV;
+}
+
+
+/* Read the MII Management Data I/O (MDIO) interfaces. */
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *mdio_addr = np->base + MIICtrl + (phy_id<<7) + (location<<2);
+	int result, boguscnt=1000;
+	/* ??? Should we add a busy-wait here? */
+	do {
+		result = readl(mdio_addr);
+	} while ((result & 0xC0000000) != 0x80000000 && --boguscnt > 0);
+	if (boguscnt == 0)
+		return 0;
+	if ((result & 0xffff) == 0xffff)
+		return 0;
+	return result & 0xffff;
+}
+
+
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *mdio_addr = np->base + MIICtrl + (phy_id<<7) + (location<<2);
+	writel(value, mdio_addr);
+	/* The busy-wait will occur before a read. */
+}
+
+
+static int netdev_open(struct net_device *dev)
+{
+	const struct firmware *fw_rx, *fw_tx;
+	const __be32 *fw_rx_data, *fw_tx_data;
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	const int irq = np->pci_dev->irq;
+	int i, retval;
+	size_t tx_size, rx_size;
+	size_t tx_done_q_size, rx_done_q_size, tx_ring_size, rx_ring_size;
+
+	/* Do we ever need to reset the chip??? */
+
+	retval = request_irq(irq, intr_handler, IRQF_SHARED, dev->name, dev);
+	if (retval)
+		return retval;
+
+	/* Disable the Rx and Tx, and reset the chip. */
+	writel(0, ioaddr + GenCtrl);
+	writel(1, ioaddr + PCIDeviceConfig);
+	if (debug > 1)
+		printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
+		       dev->name, irq);
+
+	/* Allocate the various queues. */
+	if (!np->queue_mem) {
+		tx_done_q_size = ((sizeof(struct tx_done_desc) * DONE_Q_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+		rx_done_q_size = ((sizeof(rx_done_desc) * DONE_Q_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+		tx_ring_size = ((sizeof(starfire_tx_desc) * TX_RING_SIZE + QUEUE_ALIGN - 1) / QUEUE_ALIGN) * QUEUE_ALIGN;
+		rx_ring_size = sizeof(struct starfire_rx_desc) * RX_RING_SIZE;
+		np->queue_mem_size = tx_done_q_size + rx_done_q_size + tx_ring_size + rx_ring_size;
+		np->queue_mem = dma_alloc_coherent(&np->pci_dev->dev,
+						   np->queue_mem_size,
+						   &np->queue_mem_dma, GFP_ATOMIC);
+		if (np->queue_mem == NULL) {
+			free_irq(irq, dev);
+			return -ENOMEM;
+		}
+
+		np->tx_done_q     = np->queue_mem;
+		np->tx_done_q_dma = np->queue_mem_dma;
+		np->rx_done_q     = (void *) np->tx_done_q + tx_done_q_size;
+		np->rx_done_q_dma = np->tx_done_q_dma + tx_done_q_size;
+		np->tx_ring       = (void *) np->rx_done_q + rx_done_q_size;
+		np->tx_ring_dma   = np->rx_done_q_dma + rx_done_q_size;
+		np->rx_ring       = (void *) np->tx_ring + tx_ring_size;
+		np->rx_ring_dma   = np->tx_ring_dma + tx_ring_size;
+	}
+
+	/* Start with no carrier, it gets adjusted later */
+	netif_carrier_off(dev);
+	init_ring(dev);
+	/* Set the size of the Rx buffers. */
+	writel((np->rx_buf_sz << RxBufferLenShift) |
+	       (0 << RxMinDescrThreshShift) |
+	       RxPrefetchMode | RxVariableQ |
+	       RX_Q_ENTRIES |
+	       RX_DESC_Q_ADDR_SIZE | RX_DESC_ADDR_SIZE |
+	       RxDescSpace4,
+	       ioaddr + RxDescQCtrl);
+
+	/* Set up the Rx DMA controller. */
+	writel(RxChecksumIgnore |
+	       (0 << RxEarlyIntThreshShift) |
+	       (6 << RxHighPrioThreshShift) |
+	       ((DMA_BURST_SIZE / 32) << RxBurstSizeShift),
+	       ioaddr + RxDMACtrl);
+
+	/* Set Tx descriptor */
+	writel((2 << TxHiPriFIFOThreshShift) |
+	       (0 << TxPadLenShift) |
+	       ((DMA_BURST_SIZE / 32) << TxDMABurstSizeShift) |
+	       TX_DESC_Q_ADDR_SIZE |
+	       TX_DESC_SPACING | TX_DESC_TYPE,
+	       ioaddr + TxDescCtrl);
+
+	writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + RxDescQHiAddr);
+	writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + TxRingHiAddr);
+	writel( (np->queue_mem_dma >> 16) >> 16, ioaddr + CompletionHiAddr);
+	writel(np->rx_ring_dma, ioaddr + RxDescQAddr);
+	writel(np->tx_ring_dma, ioaddr + TxRingPtr);
+
+	writel(np->tx_done_q_dma, ioaddr + TxCompletionAddr);
+	writel(np->rx_done_q_dma |
+	       RxComplType |
+	       (0 << RxComplThreshShift),
+	       ioaddr + RxCompletionAddr);
+
+	if (debug > 1)
+		printk(KERN_DEBUG "%s: Filling in the station address.\n", dev->name);
+
+	/* Fill both the Tx SA register and the Rx perfect filter. */
+	for (i = 0; i < 6; i++)
+		writeb(dev->dev_addr[i], ioaddr + TxStationAddr + 5 - i);
+	/* The first entry is special because it bypasses the VLAN filter.
+	   Don't use it. */
+	writew(0, ioaddr + PerfFilterTable);
+	writew(0, ioaddr + PerfFilterTable + 4);
+	writew(0, ioaddr + PerfFilterTable + 8);
+	for (i = 1; i < 16; i++) {
+		const __be16 *eaddrs = (const __be16 *)dev->dev_addr;
+		void __iomem *setup_frm = ioaddr + PerfFilterTable + i * 16;
+		writew(be16_to_cpu(eaddrs[2]), setup_frm); setup_frm += 4;
+		writew(be16_to_cpu(eaddrs[1]), setup_frm); setup_frm += 4;
+		writew(be16_to_cpu(eaddrs[0]), setup_frm); setup_frm += 8;
+	}
+
+	/* Initialize other registers. */
+	/* Configure the PCI bus bursts and FIFO thresholds. */
+	np->tx_mode = TxFlowEnable|RxFlowEnable|PadEnable;	/* modified when link is up. */
+	writel(MiiSoftReset | np->tx_mode, ioaddr + TxMode);
+	udelay(1000);
+	writel(np->tx_mode, ioaddr + TxMode);
+	np->tx_threshold = 4;
+	writel(np->tx_threshold, ioaddr + TxThreshold);
+
+	writel(np->intr_timer_ctrl, ioaddr + IntrTimerCtrl);
+
+	napi_enable(&np->napi);
+
+	netif_start_queue(dev);
+
+	if (debug > 1)
+		printk(KERN_DEBUG "%s: Setting the Rx and Tx modes.\n", dev->name);
+	set_rx_mode(dev);
+
+	np->mii_if.advertising = mdio_read(dev, np->phys[0], MII_ADVERTISE);
+	check_duplex(dev);
+
+	/* Enable GPIO interrupts on link change */
+	writel(0x0f00ff00, ioaddr + GPIOCtrl);
+
+	/* Set the interrupt mask */
+	writel(IntrRxDone | IntrRxEmpty | IntrDMAErr |
+	       IntrTxDMADone | IntrStatsMax | IntrLinkChange |
+	       IntrRxGFPDead | IntrNoTxCsum | IntrTxBadID,
+	       ioaddr + IntrEnable);
+	/* Enable PCI interrupts. */
+	writel(0x00800000 | readl(ioaddr + PCIDeviceConfig),
+	       ioaddr + PCIDeviceConfig);
+
+#ifdef VLAN_SUPPORT
+	/* Set VLAN type to 802.1q */
+	writel(ETH_P_8021Q, ioaddr + VlanType);
+#endif /* VLAN_SUPPORT */
+
+	retval = request_firmware(&fw_rx, FIRMWARE_RX, &np->pci_dev->dev);
+	if (retval) {
+		printk(KERN_ERR "starfire: Failed to load firmware \"%s\"\n",
+		       FIRMWARE_RX);
+		goto out_init;
+	}
+	if (fw_rx->size % 4) {
+		printk(KERN_ERR "starfire: bogus length %zu in \"%s\"\n",
+		       fw_rx->size, FIRMWARE_RX);
+		retval = -EINVAL;
+		goto out_rx;
+	}
+	retval = request_firmware(&fw_tx, FIRMWARE_TX, &np->pci_dev->dev);
+	if (retval) {
+		printk(KERN_ERR "starfire: Failed to load firmware \"%s\"\n",
+		       FIRMWARE_TX);
+		goto out_rx;
+	}
+	if (fw_tx->size % 4) {
+		printk(KERN_ERR "starfire: bogus length %zu in \"%s\"\n",
+		       fw_tx->size, FIRMWARE_TX);
+		retval = -EINVAL;
+		goto out_tx;
+	}
+	fw_rx_data = (const __be32 *)&fw_rx->data[0];
+	fw_tx_data = (const __be32 *)&fw_tx->data[0];
+	rx_size = fw_rx->size / 4;
+	tx_size = fw_tx->size / 4;
+
+	/* Load Rx/Tx firmware into the frame processors */
+	for (i = 0; i < rx_size; i++)
+		writel(be32_to_cpup(&fw_rx_data[i]), ioaddr + RxGfpMem + i * 4);
+	for (i = 0; i < tx_size; i++)
+		writel(be32_to_cpup(&fw_tx_data[i]), ioaddr + TxGfpMem + i * 4);
+	if (enable_hw_cksum)
+		/* Enable the Rx and Tx units, and the Rx/Tx frame processors. */
+		writel(TxEnable|TxGFPEnable|RxEnable|RxGFPEnable, ioaddr + GenCtrl);
+	else
+		/* Enable the Rx and Tx units only. */
+		writel(TxEnable|RxEnable, ioaddr + GenCtrl);
+
+	if (debug > 1)
+		printk(KERN_DEBUG "%s: Done netdev_open().\n",
+		       dev->name);
+
+out_tx:
+	release_firmware(fw_tx);
+out_rx:
+	release_firmware(fw_rx);
+out_init:
+	if (retval)
+		netdev_close(dev);
+	return retval;
+}
+
+
+static void check_duplex(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	u16 reg0;
+	int silly_count = 1000;
+
+	mdio_write(dev, np->phys[0], MII_ADVERTISE, np->mii_if.advertising);
+	mdio_write(dev, np->phys[0], MII_BMCR, BMCR_RESET);
+	udelay(500);
+	while (--silly_count && mdio_read(dev, np->phys[0], MII_BMCR) & BMCR_RESET)
+		/* do nothing */;
+	if (!silly_count) {
+		printk("%s: MII reset failed!\n", dev->name);
+		return;
+	}
+
+	reg0 = mdio_read(dev, np->phys[0], MII_BMCR);
+
+	if (!np->mii_if.force_media) {
+		reg0 |= BMCR_ANENABLE | BMCR_ANRESTART;
+	} else {
+		reg0 &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
+		if (np->speed100)
+			reg0 |= BMCR_SPEED100;
+		if (np->mii_if.full_duplex)
+			reg0 |= BMCR_FULLDPLX;
+		printk(KERN_DEBUG "%s: Link forced to %sMbit %s-duplex\n",
+		       dev->name,
+		       np->speed100 ? "100" : "10",
+		       np->mii_if.full_duplex ? "full" : "half");
+	}
+	mdio_write(dev, np->phys[0], MII_BMCR, reg0);
+}
+
+
+static void tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	int old_debug;
+
+	printk(KERN_WARNING "%s: Transmit timed out, status %#8.8x, "
+	       "resetting...\n", dev->name, (int) readl(ioaddr + IntrStatus));
+
+	/* Perhaps we should reinitialize the hardware here. */
+
+	/*
+	 * Stop and restart the interface.
+	 * Cheat and increase the debug level temporarily.
+	 */
+	old_debug = debug;
+	debug = 2;
+	netdev_close(dev);
+	netdev_open(dev);
+	debug = old_debug;
+
+	/* Trigger an immediate transmit demand. */
+
+	netif_trans_update(dev); /* prevent tx timeout */
+	dev->stats.tx_errors++;
+	netif_wake_queue(dev);
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void init_ring(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	int i;
+
+	np->cur_rx = np->cur_tx = np->reap_tx = 0;
+	np->dirty_rx = np->dirty_tx = np->rx_done = np->tx_done = 0;
+
+	np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
+
+	/* Fill in the Rx buffers.  Handle allocation failure gracefully. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz);
+		np->rx_info[i].skb = skb;
+		if (skb == NULL)
+			break;
+		np->rx_info[i].mapping = dma_map_single(&np->pci_dev->dev,
+							skb->data,
+							np->rx_buf_sz,
+							DMA_FROM_DEVICE);
+		if (dma_mapping_error(&np->pci_dev->dev, np->rx_info[i].mapping)) {
+			dev_kfree_skb(skb);
+			np->rx_info[i].skb = NULL;
+			break;
+		}
+		/* Grrr, we cannot offset to correctly align the IP header. */
+		np->rx_ring[i].rxaddr = cpu_to_dma(np->rx_info[i].mapping | RxDescValid);
+	}
+	writew(i - 1, np->base + RxDescQIdx);
+	np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+
+	/* Clear the remainder of the Rx buffer ring. */
+	for (  ; i < RX_RING_SIZE; i++) {
+		np->rx_ring[i].rxaddr = 0;
+		np->rx_info[i].skb = NULL;
+		np->rx_info[i].mapping = 0;
+	}
+	/* Mark the last entry as wrapping the ring. */
+	np->rx_ring[RX_RING_SIZE - 1].rxaddr |= cpu_to_dma(RxDescEndRing);
+
+	/* Clear the completion rings. */
+	for (i = 0; i < DONE_Q_SIZE; i++) {
+		np->rx_done_q[i].status = 0;
+		np->tx_done_q[i].status = 0;
+	}
+
+	for (i = 0; i < TX_RING_SIZE; i++)
+		memset(&np->tx_info[i], 0, sizeof(np->tx_info[i]));
+}
+
+
+static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	unsigned int entry;
+	unsigned int prev_tx;
+	u32 status;
+	int i, j;
+
+	/*
+	 * be cautious here, wrapping the queue has weird semantics
+	 * and we may not have enough slots even when it seems we do.
+	 */
+	if ((np->cur_tx - np->dirty_tx) + skb_num_frags(skb) * 2 > TX_RING_SIZE) {
+		netif_stop_queue(dev);
+		return NETDEV_TX_BUSY;
+	}
+
+#if defined(ZEROCOPY) && defined(HAS_BROKEN_FIRMWARE)
+	if (skb->ip_summed == CHECKSUM_PARTIAL) {
+		if (skb_padto(skb, (skb->len + PADDING_MASK) & ~PADDING_MASK))
+			return NETDEV_TX_OK;
+	}
+#endif /* ZEROCOPY && HAS_BROKEN_FIRMWARE */
+
+	prev_tx = np->cur_tx;
+	entry = np->cur_tx % TX_RING_SIZE;
+	for (i = 0; i < skb_num_frags(skb); i++) {
+		int wrap_ring = 0;
+		status = TxDescID;
+
+		if (i == 0) {
+			np->tx_info[entry].skb = skb;
+			status |= TxCRCEn;
+			if (entry >= TX_RING_SIZE - skb_num_frags(skb)) {
+				status |= TxRingWrap;
+				wrap_ring = 1;
+			}
+			if (np->reap_tx) {
+				status |= TxDescIntr;
+				np->reap_tx = 0;
+			}
+			if (skb->ip_summed == CHECKSUM_PARTIAL) {
+				status |= TxCalTCP;
+				dev->stats.tx_compressed++;
+			}
+			status |= skb_first_frag_len(skb) | (skb_num_frags(skb) << 16);
+
+			np->tx_info[entry].mapping =
+				dma_map_single(&np->pci_dev->dev, skb->data,
+					       skb_first_frag_len(skb),
+					       DMA_TO_DEVICE);
+		} else {
+			const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[i - 1];
+			status |= skb_frag_size(this_frag);
+			np->tx_info[entry].mapping =
+				dma_map_single(&np->pci_dev->dev,
+					       skb_frag_address(this_frag),
+					       skb_frag_size(this_frag),
+					       DMA_TO_DEVICE);
+		}
+		if (dma_mapping_error(&np->pci_dev->dev, np->tx_info[entry].mapping)) {
+			dev->stats.tx_dropped++;
+			goto err_out;
+		}
+
+		np->tx_ring[entry].addr = cpu_to_dma(np->tx_info[entry].mapping);
+		np->tx_ring[entry].status = cpu_to_le32(status);
+		if (debug > 3)
+			printk(KERN_DEBUG "%s: Tx #%d/#%d slot %d status %#8.8x.\n",
+			       dev->name, np->cur_tx, np->dirty_tx,
+			       entry, status);
+		if (wrap_ring) {
+			np->tx_info[entry].used_slots = TX_RING_SIZE - entry;
+			np->cur_tx += np->tx_info[entry].used_slots;
+			entry = 0;
+		} else {
+			np->tx_info[entry].used_slots = 1;
+			np->cur_tx += np->tx_info[entry].used_slots;
+			entry++;
+		}
+		/* scavenge the tx descriptors twice per TX_RING_SIZE */
+		if (np->cur_tx % (TX_RING_SIZE / 2) == 0)
+			np->reap_tx = 1;
+	}
+
+	/* Non-x86: explicitly flush descriptor cache lines here. */
+	/* Ensure all descriptors are written back before the transmit is
+	   initiated. - Jes */
+	wmb();
+
+	/* Update the producer index. */
+	writel(entry * (sizeof(starfire_tx_desc) / 8), np->base + TxProducerIdx);
+
+	/* 4 is arbitrary, but should be ok */
+	if ((np->cur_tx - np->dirty_tx) + 4 > TX_RING_SIZE)
+		netif_stop_queue(dev);
+
+	return NETDEV_TX_OK;
+
+err_out:
+	entry = prev_tx % TX_RING_SIZE;
+	np->tx_info[entry].skb = NULL;
+	if (i > 0) {
+		dma_unmap_single(&np->pci_dev->dev,
+				 np->tx_info[entry].mapping,
+				 skb_first_frag_len(skb), DMA_TO_DEVICE);
+		np->tx_info[entry].mapping = 0;
+		entry = (entry + np->tx_info[entry].used_slots) % TX_RING_SIZE;
+		for (j = 1; j < i; j++) {
+			dma_unmap_single(&np->pci_dev->dev,
+					 np->tx_info[entry].mapping,
+					 skb_frag_size(&skb_shinfo(skb)->frags[j - 1]),
+					 DMA_TO_DEVICE);
+			entry++;
+		}
+	}
+	dev_kfree_skb_any(skb);
+	np->cur_tx = prev_tx;
+	return NETDEV_TX_OK;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+static irqreturn_t intr_handler(int irq, void *dev_instance)
+{
+	struct net_device *dev = dev_instance;
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	int boguscnt = max_interrupt_work;
+	int consumer;
+	int tx_status;
+	int handled = 0;
+
+	do {
+		u32 intr_status = readl(ioaddr + IntrClear);
+
+		if (debug > 4)
+			printk(KERN_DEBUG "%s: Interrupt status %#8.8x.\n",
+			       dev->name, intr_status);
+
+		if (intr_status == 0 || intr_status == (u32) -1)
+			break;
+
+		handled = 1;
+
+		if (intr_status & (IntrRxDone | IntrRxEmpty)) {
+			u32 enable;
+
+			if (likely(napi_schedule_prep(&np->napi))) {
+				__napi_schedule(&np->napi);
+				enable = readl(ioaddr + IntrEnable);
+				enable &= ~(IntrRxDone | IntrRxEmpty);
+				writel(enable, ioaddr + IntrEnable);
+				/* flush PCI posting buffers */
+				readl(ioaddr + IntrEnable);
+			} else {
+				/* Paranoia check */
+				enable = readl(ioaddr + IntrEnable);
+				if (enable & (IntrRxDone | IntrRxEmpty)) {
+					printk(KERN_INFO
+					       "%s: interrupt while in poll!\n",
+					       dev->name);
+					enable &= ~(IntrRxDone | IntrRxEmpty);
+					writel(enable, ioaddr + IntrEnable);
+				}
+			}
+		}
+
+		/* Scavenge the skbuff list based on the Tx-done queue.
+		   There are redundant checks here that may be cleaned up
+		   after the driver has proven to be reliable. */
+		consumer = readl(ioaddr + TxConsumerIdx);
+		if (debug > 3)
+			printk(KERN_DEBUG "%s: Tx Consumer index is %d.\n",
+			       dev->name, consumer);
+
+		while ((tx_status = le32_to_cpu(np->tx_done_q[np->tx_done].status)) != 0) {
+			if (debug > 3)
+				printk(KERN_DEBUG "%s: Tx completion #%d entry %d is %#8.8x.\n",
+				       dev->name, np->dirty_tx, np->tx_done, tx_status);
+			if ((tx_status & 0xe0000000) == 0xa0000000) {
+				dev->stats.tx_packets++;
+			} else if ((tx_status & 0xe0000000) == 0x80000000) {
+				u16 entry = (tx_status & 0x7fff) / sizeof(starfire_tx_desc);
+				struct sk_buff *skb = np->tx_info[entry].skb;
+				np->tx_info[entry].skb = NULL;
+				dma_unmap_single(&np->pci_dev->dev,
+						 np->tx_info[entry].mapping,
+						 skb_first_frag_len(skb),
+						 DMA_TO_DEVICE);
+				np->tx_info[entry].mapping = 0;
+				np->dirty_tx += np->tx_info[entry].used_slots;
+				entry = (entry + np->tx_info[entry].used_slots) % TX_RING_SIZE;
+				{
+					int i;
+					for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+						dma_unmap_single(&np->pci_dev->dev,
+								 np->tx_info[entry].mapping,
+								 skb_frag_size(&skb_shinfo(skb)->frags[i]),
+								 DMA_TO_DEVICE);
+						np->dirty_tx++;
+						entry++;
+					}
+				}
+
+				dev_consume_skb_irq(skb);
+			}
+			np->tx_done_q[np->tx_done].status = 0;
+			np->tx_done = (np->tx_done + 1) % DONE_Q_SIZE;
+		}
+		writew(np->tx_done, ioaddr + CompletionQConsumerIdx + 2);
+
+		if (netif_queue_stopped(dev) &&
+		    (np->cur_tx - np->dirty_tx + 4 < TX_RING_SIZE)) {
+			/* The ring is no longer full, wake the queue. */
+			netif_wake_queue(dev);
+		}
+
+		/* Stats overflow */
+		if (intr_status & IntrStatsMax)
+			get_stats(dev);
+
+		/* Media change interrupt. */
+		if (intr_status & IntrLinkChange)
+			netdev_media_change(dev);
+
+		/* Abnormal error summary/uncommon events handlers. */
+		if (intr_status & IntrAbnormalSummary)
+			netdev_error(dev, intr_status);
+
+		if (--boguscnt < 0) {
+			if (debug > 1)
+				printk(KERN_WARNING "%s: Too much work at interrupt, "
+				       "status=%#8.8x.\n",
+				       dev->name, intr_status);
+			break;
+		}
+	} while (1);
+
+	if (debug > 4)
+		printk(KERN_DEBUG "%s: exiting interrupt, status=%#8.8x.\n",
+		       dev->name, (int) readl(ioaddr + IntrStatus));
+	return IRQ_RETVAL(handled);
+}
+
+
+/*
+ * This routine is logically part of the interrupt/poll handler, but separated
+ * for clarity and better register allocation.
+ */
+static int __netdev_rx(struct net_device *dev, int *quota)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	u32 desc_status;
+	int retcode = 0;
+
+	/* If EOP is set on the next entry, it's a new packet. Send it up. */
+	while ((desc_status = le32_to_cpu(np->rx_done_q[np->rx_done].status)) != 0) {
+		struct sk_buff *skb;
+		u16 pkt_len;
+		int entry;
+		rx_done_desc *desc = &np->rx_done_q[np->rx_done];
+
+		if (debug > 4)
+			printk(KERN_DEBUG "  netdev_rx() status of %d was %#8.8x.\n", np->rx_done, desc_status);
+		if (!(desc_status & RxOK)) {
+			/* There was an error. */
+			if (debug > 2)
+				printk(KERN_DEBUG "  netdev_rx() Rx error was %#8.8x.\n", desc_status);
+			dev->stats.rx_errors++;
+			if (desc_status & RxFIFOErr)
+				dev->stats.rx_fifo_errors++;
+			goto next_rx;
+		}
+
+		if (*quota <= 0) {	/* out of rx quota */
+			retcode = 1;
+			goto out;
+		}
+		(*quota)--;
+
+		pkt_len = desc_status;	/* Implicitly Truncate */
+		entry = (desc_status >> 16) & 0x7ff;
+
+		if (debug > 4)
+			printk(KERN_DEBUG "  netdev_rx() normal Rx pkt length %d, quota %d.\n", pkt_len, *quota);
+		/* Check if the packet is long enough to accept without copying
+		   to a minimally-sized skbuff. */
+		if (pkt_len < rx_copybreak &&
+		    (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) {
+			skb_reserve(skb, 2);	/* 16 byte align the IP header */
+			dma_sync_single_for_cpu(&np->pci_dev->dev,
+						np->rx_info[entry].mapping,
+						pkt_len, DMA_FROM_DEVICE);
+			skb_copy_to_linear_data(skb, np->rx_info[entry].skb->data, pkt_len);
+			dma_sync_single_for_device(&np->pci_dev->dev,
+						   np->rx_info[entry].mapping,
+						   pkt_len, DMA_FROM_DEVICE);
+			skb_put(skb, pkt_len);
+		} else {
+			dma_unmap_single(&np->pci_dev->dev,
+					 np->rx_info[entry].mapping,
+					 np->rx_buf_sz, DMA_FROM_DEVICE);
+			skb = np->rx_info[entry].skb;
+			skb_put(skb, pkt_len);
+			np->rx_info[entry].skb = NULL;
+			np->rx_info[entry].mapping = 0;
+		}
+#ifndef final_version			/* Remove after testing. */
+		/* You will want this info for the initial debug. */
+		if (debug > 5) {
+			printk(KERN_DEBUG "  Rx data %pM %pM %2.2x%2.2x.\n",
+			       skb->data, skb->data + 6,
+			       skb->data[12], skb->data[13]);
+		}
+#endif
+
+		skb->protocol = eth_type_trans(skb, dev);
+#ifdef VLAN_SUPPORT
+		if (debug > 4)
+			printk(KERN_DEBUG "  netdev_rx() status2 of %d was %#4.4x.\n", np->rx_done, le16_to_cpu(desc->status2));
+#endif
+		if (le16_to_cpu(desc->status2) & 0x0100) {
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+			dev->stats.rx_compressed++;
+		}
+		/*
+		 * This feature doesn't seem to be working, at least
+		 * with the two firmware versions I have. If the GFP sees
+		 * an IP fragment, it either ignores it completely, or reports
+		 * "bad checksum" on it.
+		 *
+		 * Maybe I missed something -- corrections are welcome.
+		 * Until then, the printk stays. :-) -Ion
+		 */
+		else if (le16_to_cpu(desc->status2) & 0x0040) {
+			skb->ip_summed = CHECKSUM_COMPLETE;
+			skb->csum = le16_to_cpu(desc->csum);
+			printk(KERN_DEBUG "%s: checksum_hw, status2 = %#x\n", dev->name, le16_to_cpu(desc->status2));
+		}
+#ifdef VLAN_SUPPORT
+		if (le16_to_cpu(desc->status2) & 0x0200) {
+			u16 vlid = le16_to_cpu(desc->vlanid);
+
+			if (debug > 4) {
+				printk(KERN_DEBUG "  netdev_rx() vlanid = %d\n",
+				       vlid);
+			}
+			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlid);
+		}
+#endif /* VLAN_SUPPORT */
+		netif_receive_skb(skb);
+		dev->stats.rx_packets++;
+
+	next_rx:
+		np->cur_rx++;
+		desc->status = 0;
+		np->rx_done = (np->rx_done + 1) % DONE_Q_SIZE;
+	}
+
+	if (*quota == 0) {	/* out of rx quota */
+		retcode = 1;
+		goto out;
+	}
+	writew(np->rx_done, np->base + CompletionQConsumerIdx);
+
+ out:
+	refill_rx_ring(dev);
+	if (debug > 5)
+		printk(KERN_DEBUG "  exiting netdev_rx(): %d, status of %d was %#8.8x.\n",
+		       retcode, np->rx_done, desc_status);
+	return retcode;
+}
+
+static int netdev_poll(struct napi_struct *napi, int budget)
+{
+	struct netdev_private *np = container_of(napi, struct netdev_private, napi);
+	struct net_device *dev = np->dev;
+	u32 intr_status;
+	void __iomem *ioaddr = np->base;
+	int quota = budget;
+
+	do {
+		writel(IntrRxDone | IntrRxEmpty, ioaddr + IntrClear);
+
+		if (__netdev_rx(dev, &quota))
+			goto out;
+
+		intr_status = readl(ioaddr + IntrStatus);
+	} while (intr_status & (IntrRxDone | IntrRxEmpty));
+
+	napi_complete(napi);
+	intr_status = readl(ioaddr + IntrEnable);
+	intr_status |= IntrRxDone | IntrRxEmpty;
+	writel(intr_status, ioaddr + IntrEnable);
+
+ out:
+	if (debug > 5)
+		printk(KERN_DEBUG "  exiting netdev_poll(): %d.\n",
+		       budget - quota);
+
+	/* Restart Rx engine if stopped. */
+	return budget - quota;
+}
+
+static void refill_rx_ring(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	struct sk_buff *skb;
+	int entry = -1;
+
+	/* Refill the Rx ring buffers. */
+	for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
+		entry = np->dirty_rx % RX_RING_SIZE;
+		if (np->rx_info[entry].skb == NULL) {
+			skb = netdev_alloc_skb(dev, np->rx_buf_sz);
+			np->rx_info[entry].skb = skb;
+			if (skb == NULL)
+				break;	/* Better luck next round. */
+			np->rx_info[entry].mapping =
+				dma_map_single(&np->pci_dev->dev, skb->data,
+					       np->rx_buf_sz, DMA_FROM_DEVICE);
+			if (dma_mapping_error(&np->pci_dev->dev, np->rx_info[entry].mapping)) {
+				dev_kfree_skb(skb);
+				np->rx_info[entry].skb = NULL;
+				break;
+			}
+			np->rx_ring[entry].rxaddr =
+				cpu_to_dma(np->rx_info[entry].mapping | RxDescValid);
+		}
+		if (entry == RX_RING_SIZE - 1)
+			np->rx_ring[entry].rxaddr |= cpu_to_dma(RxDescEndRing);
+	}
+	if (entry >= 0)
+		writew(entry, np->base + RxDescQIdx);
+}
+
+
+static void netdev_media_change(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	u16 reg0, reg1, reg4, reg5;
+	u32 new_tx_mode;
+	u32 new_intr_timer_ctrl;
+
+	/* reset status first */
+	mdio_read(dev, np->phys[0], MII_BMCR);
+	mdio_read(dev, np->phys[0], MII_BMSR);
+
+	reg0 = mdio_read(dev, np->phys[0], MII_BMCR);
+	reg1 = mdio_read(dev, np->phys[0], MII_BMSR);
+
+	if (reg1 & BMSR_LSTATUS) {
+		/* link is up */
+		if (reg0 & BMCR_ANENABLE) {
+			/* autonegotiation is enabled */
+			reg4 = mdio_read(dev, np->phys[0], MII_ADVERTISE);
+			reg5 = mdio_read(dev, np->phys[0], MII_LPA);
+			if (reg4 & ADVERTISE_100FULL && reg5 & LPA_100FULL) {
+				np->speed100 = 1;
+				np->mii_if.full_duplex = 1;
+			} else if (reg4 & ADVERTISE_100HALF && reg5 & LPA_100HALF) {
+				np->speed100 = 1;
+				np->mii_if.full_duplex = 0;
+			} else if (reg4 & ADVERTISE_10FULL && reg5 & LPA_10FULL) {
+				np->speed100 = 0;
+				np->mii_if.full_duplex = 1;
+			} else {
+				np->speed100 = 0;
+				np->mii_if.full_duplex = 0;
+			}
+		} else {
+			/* autonegotiation is disabled */
+			if (reg0 & BMCR_SPEED100)
+				np->speed100 = 1;
+			else
+				np->speed100 = 0;
+			if (reg0 & BMCR_FULLDPLX)
+				np->mii_if.full_duplex = 1;
+			else
+				np->mii_if.full_duplex = 0;
+		}
+		netif_carrier_on(dev);
+		printk(KERN_DEBUG "%s: Link is up, running at %sMbit %s-duplex\n",
+		       dev->name,
+		       np->speed100 ? "100" : "10",
+		       np->mii_if.full_duplex ? "full" : "half");
+
+		new_tx_mode = np->tx_mode & ~FullDuplex;	/* duplex setting */
+		if (np->mii_if.full_duplex)
+			new_tx_mode |= FullDuplex;
+		if (np->tx_mode != new_tx_mode) {
+			np->tx_mode = new_tx_mode;
+			writel(np->tx_mode | MiiSoftReset, ioaddr + TxMode);
+			udelay(1000);
+			writel(np->tx_mode, ioaddr + TxMode);
+		}
+
+		new_intr_timer_ctrl = np->intr_timer_ctrl & ~Timer10X;
+		if (np->speed100)
+			new_intr_timer_ctrl |= Timer10X;
+		if (np->intr_timer_ctrl != new_intr_timer_ctrl) {
+			np->intr_timer_ctrl = new_intr_timer_ctrl;
+			writel(new_intr_timer_ctrl, ioaddr + IntrTimerCtrl);
+		}
+	} else {
+		netif_carrier_off(dev);
+		printk(KERN_DEBUG "%s: Link is down\n", dev->name);
+	}
+}
+
+
+static void netdev_error(struct net_device *dev, int intr_status)
+{
+	struct netdev_private *np = netdev_priv(dev);
+
+	/* Came close to underrunning the Tx FIFO, increase threshold. */
+	if (intr_status & IntrTxDataLow) {
+		if (np->tx_threshold <= PKT_BUF_SZ / 16) {
+			writel(++np->tx_threshold, np->base + TxThreshold);
+			printk(KERN_NOTICE "%s: PCI bus congestion, increasing Tx FIFO threshold to %d bytes\n",
+			       dev->name, np->tx_threshold * 16);
+		} else
+			printk(KERN_WARNING "%s: PCI Tx underflow -- adapter is probably malfunctioning\n", dev->name);
+	}
+	if (intr_status & IntrRxGFPDead) {
+		dev->stats.rx_fifo_errors++;
+		dev->stats.rx_errors++;
+	}
+	if (intr_status & (IntrNoTxCsum | IntrDMAErr)) {
+		dev->stats.tx_fifo_errors++;
+		dev->stats.tx_errors++;
+	}
+	if ((intr_status & ~(IntrNormalMask | IntrAbnormalSummary | IntrLinkChange | IntrStatsMax | IntrTxDataLow | IntrRxGFPDead | IntrNoTxCsum | IntrPCIPad)) && debug)
+		printk(KERN_ERR "%s: Something Wicked happened! %#8.8x.\n",
+		       dev->name, intr_status);
+}
+
+
+static struct net_device_stats *get_stats(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+
+	/* This adapter architecture needs no SMP locks. */
+	dev->stats.tx_bytes = readl(ioaddr + 0x57010);
+	dev->stats.rx_bytes = readl(ioaddr + 0x57044);
+	dev->stats.tx_packets = readl(ioaddr + 0x57000);
+	dev->stats.tx_aborted_errors =
+		readl(ioaddr + 0x57024) + readl(ioaddr + 0x57028);
+	dev->stats.tx_window_errors = readl(ioaddr + 0x57018);
+	dev->stats.collisions =
+		readl(ioaddr + 0x57004) + readl(ioaddr + 0x57008);
+
+	/* The chip only need report frame silently dropped. */
+	dev->stats.rx_dropped += readw(ioaddr + RxDMAStatus);
+	writew(0, ioaddr + RxDMAStatus);
+	dev->stats.rx_crc_errors = readl(ioaddr + 0x5703C);
+	dev->stats.rx_frame_errors = readl(ioaddr + 0x57040);
+	dev->stats.rx_length_errors = readl(ioaddr + 0x57058);
+	dev->stats.rx_missed_errors = readl(ioaddr + 0x5707C);
+
+	return &dev->stats;
+}
+
+#ifdef VLAN_SUPPORT
+static u32 set_vlan_mode(struct netdev_private *np)
+{
+	u32 ret = VlanMode;
+	u16 vid;
+	void __iomem *filter_addr = np->base + HashTable + 8;
+	int vlan_count = 0;
+
+	for_each_set_bit(vid, np->active_vlans, VLAN_N_VID) {
+		if (vlan_count == 32)
+			break;
+		writew(vid, filter_addr);
+		filter_addr += 16;
+		vlan_count++;
+	}
+	if (vlan_count == 32) {
+		ret |= PerfectFilterVlan;
+		while (vlan_count < 32) {
+			writew(0, filter_addr);
+			filter_addr += 16;
+			vlan_count++;
+		}
+	}
+	return ret;
+}
+#endif /* VLAN_SUPPORT */
+
+static void set_rx_mode(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	u32 rx_mode = MinVLANPrio;
+	struct netdev_hw_addr *ha;
+	int i;
+
+#ifdef VLAN_SUPPORT
+	rx_mode |= set_vlan_mode(np);
+#endif /* VLAN_SUPPORT */
+
+	if (dev->flags & IFF_PROMISC) {	/* Set promiscuous. */
+		rx_mode |= AcceptAll;
+	} else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
+		   (dev->flags & IFF_ALLMULTI)) {
+		/* Too many to match, or accept all multicasts. */
+		rx_mode |= AcceptBroadcast|AcceptAllMulticast|PerfectFilter;
+	} else if (netdev_mc_count(dev) <= 14) {
+		/* Use the 16 element perfect filter, skip first two entries. */
+		void __iomem *filter_addr = ioaddr + PerfFilterTable + 2 * 16;
+		const __be16 *eaddrs;
+		netdev_for_each_mc_addr(ha, dev) {
+			eaddrs = (__be16 *) ha->addr;
+			writew(be16_to_cpu(eaddrs[2]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[1]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[0]), filter_addr); filter_addr += 8;
+		}
+		eaddrs = (const __be16 *)dev->dev_addr;
+		i = netdev_mc_count(dev) + 2;
+		while (i++ < 16) {
+			writew(be16_to_cpu(eaddrs[0]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[1]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[2]), filter_addr); filter_addr += 8;
+		}
+		rx_mode |= AcceptBroadcast|PerfectFilter;
+	} else {
+		/* Must use a multicast hash table. */
+		void __iomem *filter_addr;
+		const __be16 *eaddrs;
+		__le16 mc_filter[32] __attribute__ ((aligned(sizeof(long))));	/* Multicast hash filter */
+
+		memset(mc_filter, 0, sizeof(mc_filter));
+		netdev_for_each_mc_addr(ha, dev) {
+			/* The chip uses the upper 9 CRC bits
+			   as index into the hash table */
+			int bit_nr = ether_crc_le(ETH_ALEN, ha->addr) >> 23;
+			__le32 *fptr = (__le32 *) &mc_filter[(bit_nr >> 4) & ~1];
+
+			*fptr |= cpu_to_le32(1 << (bit_nr & 31));
+		}
+		/* Clear the perfect filter list, skip first two entries. */
+		filter_addr = ioaddr + PerfFilterTable + 2 * 16;
+		eaddrs = (const __be16 *)dev->dev_addr;
+		for (i = 2; i < 16; i++) {
+			writew(be16_to_cpu(eaddrs[0]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[1]), filter_addr); filter_addr += 4;
+			writew(be16_to_cpu(eaddrs[2]), filter_addr); filter_addr += 8;
+		}
+		for (filter_addr = ioaddr + HashTable, i = 0; i < 32; filter_addr+= 16, i++)
+			writew(mc_filter[i], filter_addr);
+		rx_mode |= AcceptBroadcast|PerfectFilter|HashFilter;
+	}
+	writel(rx_mode, ioaddr + RxFilterMode);
+}
+
+static int check_if_running(struct net_device *dev)
+{
+	if (!netif_running(dev))
+		return -EINVAL;
+	return 0;
+}
+
+static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
+	strscpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info));
+}
+
+static int get_link_ksettings(struct net_device *dev,
+			      struct ethtool_link_ksettings *cmd)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	spin_lock_irq(&np->lock);
+	mii_ethtool_get_link_ksettings(&np->mii_if, cmd);
+	spin_unlock_irq(&np->lock);
+	return 0;
+}
+
+static int set_link_ksettings(struct net_device *dev,
+			      const struct ethtool_link_ksettings *cmd)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	int res;
+	spin_lock_irq(&np->lock);
+	res = mii_ethtool_set_link_ksettings(&np->mii_if, cmd);
+	spin_unlock_irq(&np->lock);
+	check_duplex(dev);
+	return res;
+}
+
+static int nway_reset(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	return mii_nway_restart(&np->mii_if);
+}
+
+static u32 get_link(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	return mii_link_ok(&np->mii_if);
+}
+
+static u32 get_msglevel(struct net_device *dev)
+{
+	return debug;
+}
+
+static void set_msglevel(struct net_device *dev, u32 val)
+{
+	debug = val;
+}
+
+static const struct ethtool_ops ethtool_ops = {
+	.begin = check_if_running,
+	.get_drvinfo = get_drvinfo,
+	.nway_reset = nway_reset,
+	.get_link = get_link,
+	.get_msglevel = get_msglevel,
+	.set_msglevel = set_msglevel,
+	.get_link_ksettings = get_link_ksettings,
+	.set_link_ksettings = set_link_ksettings,
+};
+
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	struct mii_ioctl_data *data = if_mii(rq);
+	int rc;
+
+	if (!netif_running(dev))
+		return -EINVAL;
+
+	spin_lock_irq(&np->lock);
+	rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL);
+	spin_unlock_irq(&np->lock);
+
+	if ((cmd == SIOCSMIIREG) && (data->phy_id == np->phys[0]))
+		check_duplex(dev);
+
+	return rc;
+}
+
+static int netdev_close(struct net_device *dev)
+{
+	struct netdev_private *np = netdev_priv(dev);
+	void __iomem *ioaddr = np->base;
+	int i;
+
+	netif_stop_queue(dev);
+
+	napi_disable(&np->napi);
+
+	if (debug > 1) {
+		printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %#8.8x.\n",
+			   dev->name, (int) readl(ioaddr + IntrStatus));
+		printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
+		       dev->name, np->cur_tx, np->dirty_tx,
+		       np->cur_rx, np->dirty_rx);
+	}
+
+	/* Disable interrupts by clearing the interrupt mask. */
+	writel(0, ioaddr + IntrEnable);
+
+	/* Stop the chip's Tx and Rx processes. */
+	writel(0, ioaddr + GenCtrl);
+	readl(ioaddr + GenCtrl);
+
+	if (debug > 5) {
+		printk(KERN_DEBUG"  Tx ring at %#llx:\n",
+		       (long long) np->tx_ring_dma);
+		for (i = 0; i < 8 /* TX_RING_SIZE is huge! */; i++)
+			printk(KERN_DEBUG " #%d desc. %#8.8x %#llx -> %#8.8x.\n",
+			       i, le32_to_cpu(np->tx_ring[i].status),
+			       (long long) dma_to_cpu(np->tx_ring[i].addr),
+			       le32_to_cpu(np->tx_done_q[i].status));
+		printk(KERN_DEBUG "  Rx ring at %#llx -> %p:\n",
+		       (long long) np->rx_ring_dma, np->rx_done_q);
+		if (np->rx_done_q)
+			for (i = 0; i < 8 /* RX_RING_SIZE */; i++) {
+				printk(KERN_DEBUG " #%d desc. %#llx -> %#8.8x\n",
+				       i, (long long) dma_to_cpu(np->rx_ring[i].rxaddr), le32_to_cpu(np->rx_done_q[i].status));
+		}
+	}
+
+	free_irq(np->pci_dev->irq, dev);
+
+	/* Free all the skbuffs in the Rx queue. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		np->rx_ring[i].rxaddr = cpu_to_dma(0xBADF00D0); /* An invalid address. */
+		if (np->rx_info[i].skb != NULL) {
+			dma_unmap_single(&np->pci_dev->dev,
+					 np->rx_info[i].mapping,
+					 np->rx_buf_sz, DMA_FROM_DEVICE);
+			dev_kfree_skb(np->rx_info[i].skb);
+		}
+		np->rx_info[i].skb = NULL;
+		np->rx_info[i].mapping = 0;
+	}
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		struct sk_buff *skb = np->tx_info[i].skb;
+		if (skb == NULL)
+			continue;
+		dma_unmap_single(&np->pci_dev->dev, np->tx_info[i].mapping,
+				 skb_first_frag_len(skb), DMA_TO_DEVICE);
+		np->tx_info[i].mapping = 0;
+		dev_kfree_skb(skb);
+		np->tx_info[i].skb = NULL;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused starfire_suspend(struct device *dev_d)
+{
+	struct net_device *dev = dev_get_drvdata(dev_d);
+
+	if (netif_running(dev)) {
+		netif_device_detach(dev);
+		netdev_close(dev);
+	}
+
+	return 0;
+}
+
+static int __maybe_unused starfire_resume(struct device *dev_d)
+{
+	struct net_device *dev = dev_get_drvdata(dev_d);
+
+	if (netif_running(dev)) {
+		netdev_open(dev);
+		netif_device_attach(dev);
+	}
+
+	return 0;
+}
+
+static void starfire_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct netdev_private *np = netdev_priv(dev);
+
+	BUG_ON(!dev);
+
+	unregister_netdev(dev);
+
+	if (np->queue_mem)
+		dma_free_coherent(&pdev->dev, np->queue_mem_size,
+				  np->queue_mem, np->queue_mem_dma);
+
+
+	/* XXX: add wakeup code -- requires firmware for MagicPacket */
+	pci_set_power_state(pdev, PCI_D3hot);	/* go to sleep in D3 mode */
+	pci_disable_device(pdev);
+
+	iounmap(np->base);
+	pci_release_regions(pdev);
+
+	free_netdev(dev);			/* Will also free np!! */
+}
+
+static SIMPLE_DEV_PM_OPS(starfire_pm_ops, starfire_suspend, starfire_resume);
+
+static struct pci_driver starfire_driver = {
+	.name		= DRV_NAME,
+	.probe		= starfire_init_one,
+	.remove		= starfire_remove_one,
+	.driver.pm	= &starfire_pm_ops,
+	.id_table	= starfire_pci_tbl,
+};
+
+
+static int __init starfire_init (void)
+{
+/* when a module, this is printed whether or not devices are found in probe */
+#ifdef MODULE
+	printk(KERN_INFO DRV_NAME ": polling (NAPI) enabled\n");
+#endif
+
+	BUILD_BUG_ON(sizeof(dma_addr_t) != sizeof(netdrv_addr_t));
+
+	return pci_register_driver(&starfire_driver);
+}
+
+
+static void __exit starfire_cleanup (void)
+{
+	pci_unregister_driver (&starfire_driver);
+}
+
+
+module_init(starfire_init);
+module_exit(starfire_cleanup);