Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2412 insertions, 0 deletions

diff --git a/drivers/net/eepro100.c b/drivers/net/eepro100.c
new file mode 100644
index 0000000..98b3a2f
--- /dev/null
+++ b/drivers/net/eepro100.c
@@ -0,0 +1,2412 @@
+/* drivers/net/eepro100.c: An Intel i82557-559 Ethernet driver for Linux. */
+/*
+	Written 1996-1999 by Donald Becker.
+
+	The driver also contains updates by different kernel developers
+	(see incomplete list below).
+	Current maintainer is Andrey V. Savochkin <saw@saw.sw.com.sg>.
+	Please use this email address and linux-kernel mailing list for bug reports.
+
+	This software may be used and distributed according to the terms
+	of the GNU General Public License, incorporated herein by reference.
+
+	This driver is for the Intel EtherExpress Pro100 (Speedo3) design.
+	It should work with all i82557/558/559 boards.
+
+	Version history:
+	1998 Apr - 2000 Feb  Andrey V. Savochkin <saw@saw.sw.com.sg>
+		Serious fixes for multicast filter list setting, TX timeout routine;
+		RX ring refilling logic;  other stuff
+	2000 Feb  Jeff Garzik <jgarzik@pobox.com>
+		Convert to new PCI driver interface
+	2000 Mar 24  Dragan Stancevic <visitor@valinux.com>
+		Disabled FC and ER, to avoid lockups when when we get FCP interrupts.
+	2000 Jul 17 Goutham Rao <goutham.rao@intel.com>
+		PCI DMA API fixes, adding pci_dma_sync_single calls where neccesary
+	2000 Aug 31 David Mosberger <davidm@hpl.hp.com>
+		rx_align support: enables rx DMA without causing unaligned accesses.
+*/
+
+static const char *version =
+"eepro100.c:v1.09j-t 9/29/99 Donald Becker http://www.scyld.com/network/eepro100.html\n"
+"eepro100.c: $Revision: 1.36 $ 2000/11/17 Modified by Andrey V. Savochkin <saw@saw.sw.com.sg> and others\n";
+
+/* A few user-configurable values that apply to all boards.
+   First set is undocumented and spelled per Intel recommendations. */
+
+static int congenb /* = 0 */; /* Enable congestion control in the DP83840. */
+static int txfifo = 8;		/* Tx FIFO threshold in 4 byte units, 0-15 */
+static int rxfifo = 8;		/* Rx FIFO threshold, default 32 bytes. */
+/* Tx/Rx DMA burst length, 0-127, 0 == no preemption, tx==128 -> disabled. */
+static int txdmacount = 128;
+static int rxdmacount /* = 0 */;
+
+#if defined(__ia64__) || defined(__alpha__) || defined(__sparc__) || defined(__mips__) || \
+	defined(__arm__)
+  /* align rx buffers to 2 bytes so that IP header is aligned */
+# define rx_align(skb)		skb_reserve((skb), 2)
+# define RxFD_ALIGNMENT		__attribute__ ((aligned (2), packed))
+#else
+# define rx_align(skb)
+# define RxFD_ALIGNMENT
+#endif
+
+/* Set the copy breakpoint for the copy-only-tiny-buffer Rx method.
+   Lower values use more memory, but are faster. */
+static int rx_copybreak = 200;
+
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 20;
+
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast) */
+static int multicast_filter_limit = 64;
+
+/* 'options' is used to pass a transceiver override or full-duplex flag
+   e.g. "options=16" for FD, "options=32" for 100mbps-only. */
+static int full_duplex[] = {-1, -1, -1, -1, -1, -1, -1, -1};
+static int options[] = {-1, -1, -1, -1, -1, -1, -1, -1};
+
+/* A few values that may be tweaked. */
+/* The ring sizes should be a power of two for efficiency. */
+#define TX_RING_SIZE	64
+#define RX_RING_SIZE	64
+/* How much slots multicast filter setup may take.
+   Do not descrease without changing set_rx_mode() implementaion. */
+#define TX_MULTICAST_SIZE   2
+#define TX_MULTICAST_RESERV (TX_MULTICAST_SIZE*2)
+/* Actual number of TX packets queued, must be
+   <= TX_RING_SIZE-TX_MULTICAST_RESERV. */
+#define TX_QUEUE_LIMIT  (TX_RING_SIZE-TX_MULTICAST_RESERV)
+/* Hysteresis marking queue as no longer full. */
+#define TX_QUEUE_UNFULL (TX_QUEUE_LIMIT-4)
+
+/* Operational parameters that usually are not changed. */
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT		(2*HZ)
+/* Size of an pre-allocated Rx buffer: <Ethernet MTU> + slack.*/
+#define PKT_BUF_SZ		1536
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/mii.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/irq.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+
+static int use_io;
+static int debug = -1;
+#define DEBUG_DEFAULT		(NETIF_MSG_DRV		| \
+				 NETIF_MSG_HW		| \
+				 NETIF_MSG_RX_ERR	| \
+				 NETIF_MSG_TX_ERR)
+#define DEBUG			((debug >= 0) ? (1<<debug)-1 : DEBUG_DEFAULT)
+
+
+MODULE_AUTHOR("Maintainer: Andrey V. Savochkin <saw@saw.sw.com.sg>");
+MODULE_DESCRIPTION("Intel i82557/i82558/i82559 PCI EtherExpressPro driver");
+MODULE_LICENSE("GPL");
+module_param(use_io, int, 0);
+module_param(debug, int, 0);
+module_param_array(options, int, NULL, 0);
+module_param_array(full_duplex, int, NULL, 0);
+module_param(congenb, int, 0);
+module_param(txfifo, int, 0);
+module_param(rxfifo, int, 0);
+module_param(txdmacount, int, 0);
+module_param(rxdmacount, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param(max_interrupt_work, int, 0);
+module_param(multicast_filter_limit, int, 0);
+MODULE_PARM_DESC(debug, "debug level (0-6)");
+MODULE_PARM_DESC(options, "Bits 0-3: transceiver type, bit 4: full duplex, bit 5: 100Mbps");
+MODULE_PARM_DESC(full_duplex, "full duplex setting(s) (1)");
+MODULE_PARM_DESC(congenb, "Enable congestion control (1)");
+MODULE_PARM_DESC(txfifo, "Tx FIFO threshold in 4 byte units, (0-15)");
+MODULE_PARM_DESC(rxfifo, "Rx FIFO threshold in 4 byte units, (0-15)");
+MODULE_PARM_DESC(txdmacount, "Tx DMA burst length; 128 - disable (0-128)");
+MODULE_PARM_DESC(rxdmacount, "Rx DMA burst length; 128 - disable (0-128)");
+MODULE_PARM_DESC(rx_copybreak, "copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(max_interrupt_work, "maximum events handled per interrupt");
+MODULE_PARM_DESC(multicast_filter_limit, "maximum number of filtered multicast addresses");
+
+#define RUN_AT(x) (jiffies + (x))
+
+#define netdevice_start(dev)
+#define netdevice_stop(dev)
+#define netif_set_tx_timeout(dev, tf, tm) \
+								do { \
+									(dev)->tx_timeout = (tf); \
+									(dev)->watchdog_timeo = (tm); \
+								} while(0)
+
+
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This device driver is designed for the Intel i82557 "Speedo3" chip, Intel's
+single-chip fast Ethernet controller for PCI, as used on the Intel
+EtherExpress Pro 100 adapter.
+
+II. Board-specific settings
+
+PCI bus devices are configured by the system at boot time, so no jumpers
+need to be set on the board.  The system BIOS should be set to assign the
+PCI INTA signal to an otherwise unused system IRQ line.  While it's
+possible to share PCI interrupt lines, it negatively impacts performance and
+only recent kernels support it.
+
+III. Driver operation
+
+IIIA. General
+The Speedo3 is very similar to other Intel network chips, that is to say
+"apparently designed on a different planet".  This chips retains the complex
+Rx and Tx descriptors and multiple buffers pointers as previous chips, but
+also has simplified Tx and Rx buffer modes.  This driver uses the "flexible"
+Tx mode, but in a simplified lower-overhead manner: it associates only a
+single buffer descriptor with each frame descriptor.
+
+Despite the extra space overhead in each receive skbuff, the driver must use
+the simplified Rx buffer mode to assure that only a single data buffer is
+associated with each RxFD. The driver implements this by reserving space
+for the Rx descriptor at the head of each Rx skbuff.
+
+The Speedo-3 has receive and command unit base addresses that are added to
+almost all descriptor pointers.  The driver sets these to zero, so that all
+pointer fields are absolute addresses.
+
+The System Control Block (SCB) of some previous Intel chips exists on the
+chip in both PCI I/O and memory space.  This driver uses the I/O space
+registers, but might switch to memory mapped mode to better support non-x86
+processors.
+
+IIIB. Transmit structure
+
+The driver must use the complex Tx command+descriptor mode in order to
+have a indirect pointer to the skbuff data section.  Each Tx command block
+(TxCB) is associated with two immediately appended Tx Buffer Descriptor
+(TxBD).  A fixed ring of these TxCB+TxBD pairs are kept as part of the
+speedo_private data structure for each adapter instance.
+
+The newer i82558 explicitly supports this structure, and can read the two
+TxBDs in the same PCI burst as the TxCB.
+
+This ring structure is used for all normal transmit packets, but the
+transmit packet descriptors aren't long enough for most non-Tx commands such
+as CmdConfigure.  This is complicated by the possibility that the chip has
+already loaded the link address in the previous descriptor.  So for these
+commands we convert the next free descriptor on the ring to a NoOp, and point
+that descriptor's link to the complex command.
+
+An additional complexity of these non-transmit commands are that they may be
+added asynchronous to the normal transmit queue, so we disable interrupts
+whenever the Tx descriptor ring is manipulated.
+
+A notable aspect of these special configure commands is that they do
+work with the normal Tx ring entry scavenge method.  The Tx ring scavenge
+is done at interrupt time using the 'dirty_tx' index, and checking for the
+command-complete bit.  While the setup frames may have the NoOp command on the
+Tx ring marked as complete, but not have completed the setup command, this
+is not a problem.  The tx_ring entry can be still safely reused, as the
+tx_skbuff[] entry is always empty for config_cmd and mc_setup frames.
+
+Commands may have bits set e.g. CmdSuspend in the command word to either
+suspend or stop the transmit/command unit.  This driver always flags the last
+command with CmdSuspend, erases the CmdSuspend in the previous command, and
+then issues a CU_RESUME.
+Note: Watch out for the potential race condition here: imagine
+	erasing the previous suspend
+		the chip processes the previous command
+		the chip processes the final command, and suspends
+	doing the CU_RESUME
+		the chip processes the next-yet-valid post-final-command.
+So blindly sending a CU_RESUME is only safe if we do it immediately after
+after erasing the previous CmdSuspend, without the possibility of an
+intervening delay.  Thus the resume command is always within the
+interrupts-disabled region.  This is a timing dependence, but handling this
+condition in a timing-independent way would considerably complicate the code.
+
+Note: In previous generation Intel chips, restarting the command unit was a
+notoriously slow process.  This is presumably no longer true.
+
+IIIC. Receive structure
+
+Because of the bus-master support on the Speedo3 this driver uses the new
+SKBUFF_RX_COPYBREAK scheme, rather than a fixed intermediate receive buffer.
+This scheme allocates full-sized skbuffs as receive buffers.  The value
+SKBUFF_RX_COPYBREAK is used as the copying breakpoint: it is chosen to
+trade-off the memory wasted by passing the full-sized skbuff to the queue
+layer for all frames vs. the copying cost of copying a frame to a
+correctly-sized skbuff.
+
+For small frames the copying cost is negligible (esp. considering that we
+are pre-loading the cache with immediately useful header information), so we
+allocate a new, minimally-sized skbuff.  For large frames the copying cost
+is non-trivial, and the larger copy might flush the cache of useful data, so
+we pass up the skbuff the packet was received into.
+
+IV. Notes
+
+Thanks to Steve Williams of Intel for arranging the non-disclosure agreement
+that stated that I could disclose the information.  But I still resent
+having to sign an Intel NDA when I'm helping Intel sell their own product!
+
+*/
+
+static int speedo_found1(struct pci_dev *pdev, void __iomem *ioaddr, int fnd_cnt, int acpi_idle_state);
+
+enum pci_flags_bit {
+	PCI_USES_IO=1, PCI_USES_MEM=2, PCI_USES_MASTER=4,
+	PCI_ADDR0=0x10<<0, PCI_ADDR1=0x10<<1, PCI_ADDR2=0x10<<2, PCI_ADDR3=0x10<<3,
+};
+
+/* Offsets to the various registers.
+   All accesses need not be longword aligned. */
+enum speedo_offsets {
+	SCBStatus = 0, SCBCmd = 2,	/* Rx/Command Unit command and status. */
+	SCBIntmask = 3,
+	SCBPointer = 4,				/* General purpose pointer. */
+	SCBPort = 8,				/* Misc. commands and operands.  */
+	SCBflash = 12, SCBeeprom = 14, /* EEPROM and flash memory control. */
+	SCBCtrlMDI = 16,			/* MDI interface control. */
+	SCBEarlyRx = 20,			/* Early receive byte count. */
+};
+/* Commands that can be put in a command list entry. */
+enum commands {
+	CmdNOp = 0, CmdIASetup = 0x10000, CmdConfigure = 0x20000,
+	CmdMulticastList = 0x30000, CmdTx = 0x40000, CmdTDR = 0x50000,
+	CmdDump = 0x60000, CmdDiagnose = 0x70000,
+	CmdSuspend = 0x40000000,	/* Suspend after completion. */
+	CmdIntr = 0x20000000,		/* Interrupt after completion. */
+	CmdTxFlex = 0x00080000,		/* Use "Flexible mode" for CmdTx command. */
+};
+/* Clear CmdSuspend (1<<30) avoiding interference with the card access to the
+   status bits.  Previous driver versions used separate 16 bit fields for
+   commands and statuses.  --SAW
+ */
+#if defined(__alpha__)
+# define clear_suspend(cmd)  clear_bit(30, &(cmd)->cmd_status);
+#else
+# if defined(__LITTLE_ENDIAN)
+#  define clear_suspend(cmd)  ((__u16 *)&(cmd)->cmd_status)[1] &= ~0x4000
+# elif defined(__BIG_ENDIAN)
+#  define clear_suspend(cmd)  ((__u16 *)&(cmd)->cmd_status)[1] &= ~0x0040
+# else
+#  error Unsupported byteorder
+# endif
+#endif
+
+enum SCBCmdBits {
+	SCBMaskCmdDone=0x8000, SCBMaskRxDone=0x4000, SCBMaskCmdIdle=0x2000,
+	SCBMaskRxSuspend=0x1000, SCBMaskEarlyRx=0x0800, SCBMaskFlowCtl=0x0400,
+	SCBTriggerIntr=0x0200, SCBMaskAll=0x0100,
+	/* The rest are Rx and Tx commands. */
+	CUStart=0x0010, CUResume=0x0020, CUStatsAddr=0x0040, CUShowStats=0x0050,
+	CUCmdBase=0x0060,	/* CU Base address (set to zero) . */
+	CUDumpStats=0x0070, /* Dump then reset stats counters. */
+	RxStart=0x0001, RxResume=0x0002, RxAbort=0x0004, RxAddrLoad=0x0006,
+	RxResumeNoResources=0x0007,
+};
+
+enum SCBPort_cmds {
+	PortReset=0, PortSelfTest=1, PortPartialReset=2, PortDump=3,
+};
+
+/* The Speedo3 Rx and Tx frame/buffer descriptors. */
+struct descriptor {			    /* A generic descriptor. */
+	volatile s32 cmd_status;	/* All command and status fields. */
+	u32 link;				    /* struct descriptor *  */
+	unsigned char params[0];
+};
+
+/* The Speedo3 Rx and Tx buffer descriptors. */
+struct RxFD {					/* Receive frame descriptor. */
+	volatile s32 status;
+	u32 link;					/* struct RxFD * */
+	u32 rx_buf_addr;			/* void * */
+	u32 count;
+} RxFD_ALIGNMENT;
+
+/* Selected elements of the Tx/RxFD.status word. */
+enum RxFD_bits {
+	RxComplete=0x8000, RxOK=0x2000,
+	RxErrCRC=0x0800, RxErrAlign=0x0400, RxErrTooBig=0x0200, RxErrSymbol=0x0010,
+	RxEth2Type=0x0020, RxNoMatch=0x0004, RxNoIAMatch=0x0002,
+	TxUnderrun=0x1000,  StatusComplete=0x8000,
+};
+
+#define CONFIG_DATA_SIZE 22
+struct TxFD {					/* Transmit frame descriptor set. */
+	s32 status;
+	u32 link;					/* void * */
+	u32 tx_desc_addr;			/* Always points to the tx_buf_addr element. */
+	s32 count;					/* # of TBD (=1), Tx start thresh., etc. */
+	/* This constitutes two "TBD" entries -- we only use one. */
+#define TX_DESCR_BUF_OFFSET 16
+	u32 tx_buf_addr0;			/* void *, frame to be transmitted.  */
+	s32 tx_buf_size0;			/* Length of Tx frame. */
+	u32 tx_buf_addr1;			/* void *, frame to be transmitted.  */
+	s32 tx_buf_size1;			/* Length of Tx frame. */
+	/* the structure must have space for at least CONFIG_DATA_SIZE starting
+	 * from tx_desc_addr field */
+};
+
+/* Multicast filter setting block.  --SAW */
+struct speedo_mc_block {
+	struct speedo_mc_block *next;
+	unsigned int tx;
+	dma_addr_t frame_dma;
+	unsigned int len;
+	struct descriptor frame __attribute__ ((__aligned__(16)));
+};
+
+/* Elements of the dump_statistics block. This block must be lword aligned. */
+struct speedo_stats {
+	u32 tx_good_frames;
+	u32 tx_coll16_errs;
+	u32 tx_late_colls;
+	u32 tx_underruns;
+	u32 tx_lost_carrier;
+	u32 tx_deferred;
+	u32 tx_one_colls;
+	u32 tx_multi_colls;
+	u32 tx_total_colls;
+	u32 rx_good_frames;
+	u32 rx_crc_errs;
+	u32 rx_align_errs;
+	u32 rx_resource_errs;
+	u32 rx_overrun_errs;
+	u32 rx_colls_errs;
+	u32 rx_runt_errs;
+	u32 done_marker;
+};
+
+enum Rx_ring_state_bits {
+	RrNoMem=1, RrPostponed=2, RrNoResources=4, RrOOMReported=8,
+};
+
+/* Do not change the position (alignment) of the first few elements!
+   The later elements are grouped for cache locality.
+
+   Unfortunately, all the positions have been shifted since there.
+   A new re-alignment is required.  2000/03/06  SAW */
+struct speedo_private {
+    void __iomem *regs;
+	struct TxFD	*tx_ring;		/* Commands (usually CmdTxPacket). */
+	struct RxFD *rx_ringp[RX_RING_SIZE];	/* Rx descriptor, used as ring. */
+	/* The addresses of a Tx/Rx-in-place packets/buffers. */
+	struct sk_buff *tx_skbuff[TX_RING_SIZE];
+	struct sk_buff *rx_skbuff[RX_RING_SIZE];
+	/* Mapped addresses of the rings. */
+	dma_addr_t tx_ring_dma;
+#define TX_RING_ELEM_DMA(sp, n) ((sp)->tx_ring_dma + (n)*sizeof(struct TxFD))
+	dma_addr_t rx_ring_dma[RX_RING_SIZE];
+	struct descriptor *last_cmd;		/* Last command sent. */
+	unsigned int cur_tx, dirty_tx;		/* The ring entries to be free()ed. */
+	spinlock_t lock;			/* Group with Tx control cache line. */
+	u32 tx_threshold;			/* The value for txdesc.count. */
+	struct RxFD *last_rxf;			/* Last filled RX buffer. */
+	dma_addr_t last_rxf_dma;
+	unsigned int cur_rx, dirty_rx;		/* The next free ring entry */
+	long last_rx_time;			/* Last Rx, in jiffies, to handle Rx hang. */
+	struct net_device_stats stats;
+	struct speedo_stats *lstats;
+	dma_addr_t lstats_dma;
+	int chip_id;
+	struct pci_dev *pdev;
+	struct timer_list timer;		/* Media selection timer. */
+	struct speedo_mc_block *mc_setup_head;	/* Multicast setup frame list head. */
+	struct speedo_mc_block *mc_setup_tail;	/* Multicast setup frame list tail. */
+	long in_interrupt;			/* Word-aligned dev->interrupt */
+	unsigned char acpi_pwr;
+	signed char rx_mode;			/* Current PROMISC/ALLMULTI setting. */
+	unsigned int tx_full:1;			/* The Tx queue is full. */
+	unsigned int flow_ctrl:1;		/* Use 802.3x flow control. */
+	unsigned int rx_bug:1;			/* Work around receiver hang errata. */
+	unsigned char default_port:8;		/* Last dev->if_port value. */
+	unsigned char rx_ring_state;		/* RX ring status flags. */
+	unsigned short phy[2];			/* PHY media interfaces available. */
+	unsigned short partner;			/* Link partner caps. */
+	struct mii_if_info mii_if;		/* MII API hooks, info */
+	u32 msg_enable;				/* debug message level */
+};
+
+/* The parameters for a CmdConfigure operation.
+   There are so many options that it would be difficult to document each bit.
+   We mostly use the default or recommended settings. */
+static const char i82557_config_cmd[CONFIG_DATA_SIZE] = {
+	22, 0x08, 0, 0,  0, 0, 0x32, 0x03,  1, /* 1=Use MII  0=Use AUI */
+	0, 0x2E, 0,  0x60, 0,
+	0xf2, 0x48,   0, 0x40, 0xf2, 0x80, 		/* 0x40=Force full-duplex */
+	0x3f, 0x05, };
+static const char i82558_config_cmd[CONFIG_DATA_SIZE] = {
+	22, 0x08, 0, 1,  0, 0, 0x22, 0x03,  1, /* 1=Use MII  0=Use AUI */
+	0, 0x2E, 0,  0x60, 0x08, 0x88,
+	0x68, 0, 0x40, 0xf2, 0x84,		/* Disable FC */
+	0x31, 0x05, };
+
+/* PHY media interface chips. */
+static const char *phys[] = {
+	"None", "i82553-A/B", "i82553-C", "i82503",
+	"DP83840", "80c240", "80c24", "i82555",
+	"unknown-8", "unknown-9", "DP83840A", "unknown-11",
+	"unknown-12", "unknown-13", "unknown-14", "unknown-15", };
+enum phy_chips { NonSuchPhy=0, I82553AB, I82553C, I82503, DP83840, S80C240,
+					 S80C24, I82555, DP83840A=10, };
+static const char is_mii[] = { 0, 1, 1, 0, 1, 1, 0, 1 };
+#define EE_READ_CMD		(6)
+
+static int eepro100_init_one(struct pci_dev *pdev,
+		const struct pci_device_id *ent);
+
+static int do_eeprom_cmd(void __iomem *ioaddr, int cmd, int cmd_len);
+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 speedo_open(struct net_device *dev);
+static void speedo_resume(struct net_device *dev);
+static void speedo_timer(unsigned long data);
+static void speedo_init_rx_ring(struct net_device *dev);
+static void speedo_tx_timeout(struct net_device *dev);
+static int speedo_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void speedo_refill_rx_buffers(struct net_device *dev, int force);
+static int speedo_rx(struct net_device *dev);
+static void speedo_tx_buffer_gc(struct net_device *dev);
+static irqreturn_t speedo_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
+static int speedo_close(struct net_device *dev);
+static struct net_device_stats *speedo_get_stats(struct net_device *dev);
+static int speedo_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static void set_rx_mode(struct net_device *dev);
+static void speedo_show_state(struct net_device *dev);
+static struct ethtool_ops ethtool_ops;
+
+
+
+#ifdef honor_default_port
+/* Optional driver feature to allow forcing the transceiver setting.
+   Not recommended. */
+static int mii_ctrl[8] = { 0x3300, 0x3100, 0x0000, 0x0100,
+						   0x2000, 0x2100, 0x0400, 0x3100};
+#endif
+
+/* How to wait for the command unit to accept a command.
+   Typically this takes 0 ticks. */
+static inline unsigned char wait_for_cmd_done(struct net_device *dev,
+											  	struct speedo_private *sp)
+{
+	int wait = 1000;
+	void __iomem *cmd_ioaddr = sp->regs + SCBCmd;
+	unsigned char r;
+
+	do  {
+		udelay(1);
+		r = ioread8(cmd_ioaddr);
+	} while(r && --wait >= 0);
+
+	if (wait < 0)
+		printk(KERN_ALERT "%s: wait_for_cmd_done timeout!\n", dev->name);
+	return r;
+}
+
+static int __devinit eepro100_init_one (struct pci_dev *pdev,
+		const struct pci_device_id *ent)
+{
+	void __iomem *ioaddr;
+	int irq, pci_bar;
+	int acpi_idle_state = 0, pm;
+	static int cards_found /* = 0 */;
+	unsigned long pci_base;
+
+#ifndef MODULE
+	/* when built-in, we only print version if device is found */
+	static int did_version;
+	if (did_version++ == 0)
+		printk(version);
+#endif
+
+	/* save power state before pci_enable_device overwrites it */
+	pm = pci_find_capability(pdev, PCI_CAP_ID_PM);
+	if (pm) {
+		u16 pwr_command;
+		pci_read_config_word(pdev, pm + PCI_PM_CTRL, &pwr_command);
+		acpi_idle_state = pwr_command & PCI_PM_CTRL_STATE_MASK;
+	}
+
+	if (pci_enable_device(pdev))
+		goto err_out_free_mmio_region;
+
+	pci_set_master(pdev);
+
+	if (!request_region(pci_resource_start(pdev, 1),
+			pci_resource_len(pdev, 1), "eepro100")) {
+		printk (KERN_ERR "eepro100: cannot reserve I/O ports\n");
+		goto err_out_none;
+	}
+	if (!request_mem_region(pci_resource_start(pdev, 0),
+			pci_resource_len(pdev, 0), "eepro100")) {
+		printk (KERN_ERR "eepro100: cannot reserve MMIO region\n");
+		goto err_out_free_pio_region;
+	}
+
+	irq = pdev->irq;
+	pci_bar = use_io ? 1 : 0;
+	pci_base = pci_resource_start(pdev, pci_bar);
+	if (DEBUG & NETIF_MSG_PROBE)
+		printk("Found Intel i82557 PCI Speedo at %#lx, IRQ %d.\n",
+		       pci_base, irq);
+
+	ioaddr = pci_iomap(pdev, pci_bar, 0);
+	if (!ioaddr) {
+		printk (KERN_ERR "eepro100: cannot remap IO\n");
+		goto err_out_free_mmio_region;
+	}
+
+	if (speedo_found1(pdev, ioaddr, cards_found, acpi_idle_state) == 0)
+		cards_found++;
+	else
+		goto err_out_iounmap;
+
+	return 0;
+
+err_out_iounmap: ;
+	pci_iounmap(pdev, ioaddr);
+err_out_free_mmio_region:
+	release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+err_out_free_pio_region:
+	release_region(pci_resource_start(pdev, 1), pci_resource_len(pdev, 1));
+err_out_none:
+	return -ENODEV;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+
+static void poll_speedo (struct net_device *dev)
+{
+	/* disable_irq is not very nice, but with the funny lockless design
+	   we have no other choice. */
+	disable_irq(dev->irq);
+	speedo_interrupt (dev->irq, dev, NULL);
+	enable_irq(dev->irq);
+}
+#endif
+
+static int __devinit speedo_found1(struct pci_dev *pdev,
+		void __iomem *ioaddr, int card_idx, int acpi_idle_state)
+{
+	struct net_device *dev;
+	struct speedo_private *sp;
+	const char *product;
+	int i, option;
+	u16 eeprom[0x100];
+	int size;
+	void *tx_ring_space;
+	dma_addr_t tx_ring_dma;
+
+	size = TX_RING_SIZE * sizeof(struct TxFD) + sizeof(struct speedo_stats);
+	tx_ring_space = pci_alloc_consistent(pdev, size, &tx_ring_dma);
+	if (tx_ring_space == NULL)
+		return -1;
+
+	dev = alloc_etherdev(sizeof(struct speedo_private));
+	if (dev == NULL) {
+		printk(KERN_ERR "eepro100: Could not allocate ethernet device.\n");
+		pci_free_consistent(pdev, size, tx_ring_space, tx_ring_dma);
+		return -1;
+	}
+
+	SET_MODULE_OWNER(dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	if (dev->mem_start > 0)
+		option = dev->mem_start;
+	else if (card_idx >= 0  &&  options[card_idx] >= 0)
+		option = options[card_idx];
+	else
+		option = 0;
+
+	rtnl_lock();
+	if (dev_alloc_name(dev, dev->name) < 0) 
+		goto err_free_unlock;
+
+	/* Read the station address EEPROM before doing the reset.
+	   Nominally his should even be done before accepting the device, but
+	   then we wouldn't have a device name with which to report the error.
+	   The size test is for 6 bit vs. 8 bit address serial EEPROMs.
+	*/
+	{
+		void __iomem *iobase;
+		int read_cmd, ee_size;
+		u16 sum;
+		int j;
+
+		/* Use IO only to avoid postponed writes and satisfy EEPROM timing
+		   requirements. */
+		iobase = pci_iomap(pdev, 1, pci_resource_len(pdev, 1));
+		if (!iobase)
+			goto err_free_unlock;
+		if ((do_eeprom_cmd(iobase, EE_READ_CMD << 24, 27) & 0xffe0000)
+			== 0xffe0000) {
+			ee_size = 0x100;
+			read_cmd = EE_READ_CMD << 24;
+		} else {
+			ee_size = 0x40;
+			read_cmd = EE_READ_CMD << 22;
+		}
+
+		for (j = 0, i = 0, sum = 0; i < ee_size; i++) {
+			u16 value = do_eeprom_cmd(iobase, read_cmd | (i << 16), 27);
+			eeprom[i] = value;
+			sum += value;
+			if (i < 3) {
+				dev->dev_addr[j++] = value;
+				dev->dev_addr[j++] = value >> 8;
+			}
+		}
+		if (sum != 0xBABA)
+			printk(KERN_WARNING "%s: Invalid EEPROM checksum %#4.4x, "
+				   "check settings before activating this device!\n",
+				   dev->name, sum);
+		/* Don't  unregister_netdev(dev);  as the EEPro may actually be
+		   usable, especially if the MAC address is set later.
+		   On the other hand, it may be unusable if MDI data is corrupted. */
+
+		pci_iounmap(pdev, iobase);
+	}
+
+	/* Reset the chip: stop Tx and Rx processes and clear counters.
+	   This takes less than 10usec and will easily finish before the next
+	   action. */
+	iowrite32(PortReset, ioaddr + SCBPort);
+	ioread32(ioaddr + SCBPort);
+	udelay(10);
+
+	if (eeprom[3] & 0x0100)
+		product = "OEM i82557/i82558 10/100 Ethernet";
+	else
+		product = pci_name(pdev);
+
+	printk(KERN_INFO "%s: %s, ", dev->name, product);
+
+	for (i = 0; i < 5; i++)
+		printk("%2.2X:", dev->dev_addr[i]);
+	printk("%2.2X, ", dev->dev_addr[i]);
+	printk("IRQ %d.\n", pdev->irq);
+
+	sp = netdev_priv(dev);
+
+	/* we must initialize this early, for mdio_{read,write} */
+	sp->regs = ioaddr;
+
+#if 1 || defined(kernel_bloat)
+	/* OK, this is pure kernel bloat.  I don't like it when other drivers
+	   waste non-pageable kernel space to emit similar messages, but I need
+	   them for bug reports. */
+	{
+		const char *connectors[] = {" RJ45", " BNC", " AUI", " MII"};
+		/* The self-test results must be paragraph aligned. */
+		volatile s32 *self_test_results;
+		int boguscnt = 16000;	/* Timeout for set-test. */
+		if ((eeprom[3] & 0x03) != 0x03)
+			printk(KERN_INFO "  Receiver lock-up bug exists -- enabling"
+				   " work-around.\n");
+		printk(KERN_INFO "  Board assembly %4.4x%2.2x-%3.3d, Physical"
+			   " connectors present:",
+			   eeprom[8], eeprom[9]>>8, eeprom[9] & 0xff);
+		for (i = 0; i < 4; i++)
+			if (eeprom[5] & (1<<i))
+				printk(connectors[i]);
+		printk("\n"KERN_INFO"  Primary interface chip %s PHY #%d.\n",
+			   phys[(eeprom[6]>>8)&15], eeprom[6] & 0x1f);
+		if (eeprom[7] & 0x0700)
+			printk(KERN_INFO "    Secondary interface chip %s.\n",
+				   phys[(eeprom[7]>>8)&7]);
+		if (((eeprom[6]>>8) & 0x3f) == DP83840
+			||  ((eeprom[6]>>8) & 0x3f) == DP83840A) {
+			int mdi_reg23 = mdio_read(dev, eeprom[6] & 0x1f, 23) | 0x0422;
+			if (congenb)
+			  mdi_reg23 |= 0x0100;
+			printk(KERN_INFO"  DP83840 specific setup, setting register 23 to %4.4x.\n",
+				   mdi_reg23);
+			mdio_write(dev, eeprom[6] & 0x1f, 23, mdi_reg23);
+		}
+		if ((option >= 0) && (option & 0x70)) {
+			printk(KERN_INFO "  Forcing %dMbs %s-duplex operation.\n",
+				   (option & 0x20 ? 100 : 10),
+				   (option & 0x10 ? "full" : "half"));
+			mdio_write(dev, eeprom[6] & 0x1f, MII_BMCR,
+					   ((option & 0x20) ? 0x2000 : 0) | 	/* 100mbps? */
+					   ((option & 0x10) ? 0x0100 : 0)); /* Full duplex? */
+		}
+
+		/* Perform a system self-test. */
+		self_test_results = (s32*) ((((long) tx_ring_space) + 15) & ~0xf);
+		self_test_results[0] = 0;
+		self_test_results[1] = -1;
+		iowrite32(tx_ring_dma | PortSelfTest, ioaddr + SCBPort);
+		do {
+			udelay(10);
+		} while (self_test_results[1] == -1  &&  --boguscnt >= 0);
+
+		if (boguscnt < 0) {		/* Test optimized out. */
+			printk(KERN_ERR "Self test failed, status %8.8x:\n"
+				   KERN_ERR " Failure to initialize the i82557.\n"
+				   KERN_ERR " Verify that the card is a bus-master"
+				   " capable slot.\n",
+				   self_test_results[1]);
+		} else
+			printk(KERN_INFO "  General self-test: %s.\n"
+				   KERN_INFO "  Serial sub-system self-test: %s.\n"
+				   KERN_INFO "  Internal registers self-test: %s.\n"
+				   KERN_INFO "  ROM checksum self-test: %s (%#8.8x).\n",
+				   self_test_results[1] & 0x1000 ? "failed" : "passed",
+				   self_test_results[1] & 0x0020 ? "failed" : "passed",
+				   self_test_results[1] & 0x0008 ? "failed" : "passed",
+				   self_test_results[1] & 0x0004 ? "failed" : "passed",
+				   self_test_results[0]);
+	}
+#endif  /* kernel_bloat */
+
+	iowrite32(PortReset, ioaddr + SCBPort);
+	ioread32(ioaddr + SCBPort);
+	udelay(10);
+
+	/* Return the chip to its original power state. */
+	pci_set_power_state(pdev, acpi_idle_state);
+
+	pci_set_drvdata (pdev, dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	dev->irq = pdev->irq;
+
+	sp->pdev = pdev;
+	sp->msg_enable = DEBUG;
+	sp->acpi_pwr = acpi_idle_state;
+	sp->tx_ring = tx_ring_space;
+	sp->tx_ring_dma = tx_ring_dma;
+	sp->lstats = (struct speedo_stats *)(sp->tx_ring + TX_RING_SIZE);
+	sp->lstats_dma = TX_RING_ELEM_DMA(sp, TX_RING_SIZE);
+	init_timer(&sp->timer); /* used in ioctl() */
+	spin_lock_init(&sp->lock);
+
+	sp->mii_if.full_duplex = option >= 0 && (option & 0x10) ? 1 : 0;
+	if (card_idx >= 0) {
+		if (full_duplex[card_idx] >= 0)
+			sp->mii_if.full_duplex = full_duplex[card_idx];
+	}
+	sp->default_port = option >= 0 ? (option & 0x0f) : 0;
+
+	sp->phy[0] = eeprom[6];
+	sp->phy[1] = eeprom[7];
+
+	sp->mii_if.phy_id = eeprom[6] & 0x1f;
+	sp->mii_if.phy_id_mask = 0x1f;
+	sp->mii_if.reg_num_mask = 0x1f;
+	sp->mii_if.dev = dev;
+	sp->mii_if.mdio_read = mdio_read;
+	sp->mii_if.mdio_write = mdio_write;
+	
+	sp->rx_bug = (eeprom[3] & 0x03) == 3 ? 0 : 1;
+	if (((pdev->device > 0x1030 && (pdev->device < 0x103F))) 
+	    || (pdev->device == 0x2449) || (pdev->device == 0x2459) 
+            || (pdev->device == 0x245D)) {
+	    	sp->chip_id = 1;
+	}
+
+	if (sp->rx_bug)
+		printk(KERN_INFO "  Receiver lock-up workaround activated.\n");
+
+	/* The Speedo-specific entries in the device structure. */
+	dev->open = &speedo_open;
+	dev->hard_start_xmit = &speedo_start_xmit;
+	netif_set_tx_timeout(dev, &speedo_tx_timeout, TX_TIMEOUT);
+	dev->stop = &speedo_close;
+	dev->get_stats = &speedo_get_stats;
+	dev->set_multicast_list = &set_rx_mode;
+	dev->do_ioctl = &speedo_ioctl;
+	SET_ETHTOOL_OPS(dev, &ethtool_ops);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = &poll_speedo;
+#endif
+
+	if (register_netdevice(dev))
+		goto err_free_unlock;
+	rtnl_unlock();
+
+	return 0;
+
+ err_free_unlock:
+	rtnl_unlock();
+	free_netdev(dev);
+	return -1;
+}
+
+static void do_slow_command(struct net_device *dev, struct speedo_private *sp, int cmd)
+{
+	void __iomem *cmd_ioaddr = sp->regs + SCBCmd;
+	int wait = 0;
+	do
+		if (ioread8(cmd_ioaddr) == 0) break;
+	while(++wait <= 200);
+	if (wait > 100)
+		printk(KERN_ERR "Command %4.4x never accepted (%d polls)!\n",
+		       ioread8(cmd_ioaddr), wait);
+
+	iowrite8(cmd, cmd_ioaddr);
+
+	for (wait = 0; wait <= 100; wait++)
+		if (ioread8(cmd_ioaddr) == 0) return;
+	for (; wait <= 20000; wait++)
+		if (ioread8(cmd_ioaddr) == 0) return;
+		else udelay(1);
+	printk(KERN_ERR "Command %4.4x was not accepted after %d polls!"
+	       "  Current status %8.8x.\n",
+	       cmd, wait, ioread32(sp->regs + SCBStatus));
+}
+
+/* Serial EEPROM section.
+   A "bit" grungy, but we work our way through bit-by-bit :->. */
+/*  EEPROM_Ctrl bits. */
+#define EE_SHIFT_CLK	0x01	/* EEPROM shift clock. */
+#define EE_CS			0x02	/* EEPROM chip select. */
+#define EE_DATA_WRITE	0x04	/* EEPROM chip data in. */
+#define EE_DATA_READ	0x08	/* EEPROM chip data out. */
+#define EE_ENB			(0x4800 | EE_CS)
+#define EE_WRITE_0		0x4802
+#define EE_WRITE_1		0x4806
+#define EE_OFFSET		SCBeeprom
+
+/* The fixes for the code were kindly provided by Dragan Stancevic
+   <visitor@valinux.com> to strictly follow Intel specifications of EEPROM
+   access timing.
+   The publicly available sheet 64486302 (sec. 3.1) specifies 1us access
+   interval for serial EEPROM.  However, it looks like that there is an
+   additional requirement dictating larger udelay's in the code below.
+   2000/05/24  SAW */
+static int __devinit do_eeprom_cmd(void __iomem *ioaddr, int cmd, int cmd_len)
+{
+	unsigned retval = 0;
+	void __iomem *ee_addr = ioaddr + SCBeeprom;
+
+	iowrite16(EE_ENB, ee_addr); udelay(2);
+	iowrite16(EE_ENB | EE_SHIFT_CLK, ee_addr); udelay(2);
+
+	/* Shift the command bits out. */
+	do {
+		short dataval = (cmd & (1 << cmd_len)) ? EE_WRITE_1 : EE_WRITE_0;
+		iowrite16(dataval, ee_addr); udelay(2);
+		iowrite16(dataval | EE_SHIFT_CLK, ee_addr); udelay(2);
+		retval = (retval << 1) | ((ioread16(ee_addr) & EE_DATA_READ) ? 1 : 0);
+	} while (--cmd_len >= 0);
+	iowrite16(EE_ENB, ee_addr); udelay(2);
+
+	/* Terminate the EEPROM access. */
+	iowrite16(EE_ENB & ~EE_CS, ee_addr);
+	return retval;
+}
+
+static int mdio_read(struct net_device *dev, int phy_id, int location)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int val, boguscnt = 64*10;		/* <64 usec. to complete, typ 27 ticks */
+	iowrite32(0x08000000 | (location<<16) | (phy_id<<21), ioaddr + SCBCtrlMDI);
+	do {
+		val = ioread32(ioaddr + SCBCtrlMDI);
+		if (--boguscnt < 0) {
+			printk(KERN_ERR " mdio_read() timed out with val = %8.8x.\n", val);
+			break;
+		}
+	} while (! (val & 0x10000000));
+	return val & 0xffff;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int val, boguscnt = 64*10;		/* <64 usec. to complete, typ 27 ticks */
+	iowrite32(0x04000000 | (location<<16) | (phy_id<<21) | value,
+		 ioaddr + SCBCtrlMDI);
+	do {
+		val = ioread32(ioaddr + SCBCtrlMDI);
+		if (--boguscnt < 0) {
+			printk(KERN_ERR" mdio_write() timed out with val = %8.8x.\n", val);
+			break;
+		}
+	} while (! (val & 0x10000000));
+}
+
+static int
+speedo_open(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int retval;
+
+	if (netif_msg_ifup(sp))
+		printk(KERN_DEBUG "%s: speedo_open() irq %d.\n", dev->name, dev->irq);
+
+	pci_set_power_state(sp->pdev, PCI_D0);
+
+	/* Set up the Tx queue early.. */
+	sp->cur_tx = 0;
+	sp->dirty_tx = 0;
+	sp->last_cmd = NULL;
+	sp->tx_full = 0;
+	sp->in_interrupt = 0;
+
+	/* .. we can safely take handler calls during init. */
+	retval = request_irq(dev->irq, &speedo_interrupt, SA_SHIRQ, dev->name, dev);
+	if (retval) {
+		return retval;
+	}
+
+	dev->if_port = sp->default_port;
+
+#ifdef oh_no_you_dont_unless_you_honour_the_options_passed_in_to_us
+	/* Retrigger negotiation to reset previous errors. */
+	if ((sp->phy[0] & 0x8000) == 0) {
+		int phy_addr = sp->phy[0] & 0x1f ;
+		/* Use 0x3300 for restarting NWay, other values to force xcvr:
+		   0x0000 10-HD
+		   0x0100 10-FD
+		   0x2000 100-HD
+		   0x2100 100-FD
+		*/
+#ifdef honor_default_port
+		mdio_write(dev, phy_addr, MII_BMCR, mii_ctrl[dev->default_port & 7]);
+#else
+		mdio_write(dev, phy_addr, MII_BMCR, 0x3300);
+#endif
+	}
+#endif
+
+	speedo_init_rx_ring(dev);
+
+	/* Fire up the hardware. */
+	iowrite16(SCBMaskAll, ioaddr + SCBCmd);
+	speedo_resume(dev);
+
+	netdevice_start(dev);
+	netif_start_queue(dev);
+
+	/* Setup the chip and configure the multicast list. */
+	sp->mc_setup_head = NULL;
+	sp->mc_setup_tail = NULL;
+	sp->flow_ctrl = sp->partner = 0;
+	sp->rx_mode = -1;			/* Invalid -> always reset the mode. */
+	set_rx_mode(dev);
+	if ((sp->phy[0] & 0x8000) == 0)
+		sp->mii_if.advertising = mdio_read(dev, sp->phy[0] & 0x1f, MII_ADVERTISE);
+
+	mii_check_link(&sp->mii_if);
+
+	if (netif_msg_ifup(sp)) {
+		printk(KERN_DEBUG "%s: Done speedo_open(), status %8.8x.\n",
+			   dev->name, ioread16(ioaddr + SCBStatus));
+	}
+
+	/* Set the timer.  The timer serves a dual purpose:
+	   1) to monitor the media interface (e.g. link beat) and perhaps switch
+	   to an alternate media type
+	   2) to monitor Rx activity, and restart the Rx process if the receiver
+	   hangs. */
+	sp->timer.expires = RUN_AT((24*HZ)/10); 			/* 2.4 sec. */
+	sp->timer.data = (unsigned long)dev;
+	sp->timer.function = &speedo_timer;					/* timer handler */
+	add_timer(&sp->timer);
+
+	/* No need to wait for the command unit to accept here. */
+	if ((sp->phy[0] & 0x8000) == 0)
+		mdio_read(dev, sp->phy[0] & 0x1f, MII_BMCR);
+
+	return 0;
+}
+
+/* Start the chip hardware after a full reset. */
+static void speedo_resume(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+
+	/* Start with a Tx threshold of 256 (0x..20.... 8 byte units). */
+	sp->tx_threshold = 0x01208000;
+
+	/* Set the segment registers to '0'. */
+	if (wait_for_cmd_done(dev, sp) != 0) {
+		iowrite32(PortPartialReset, ioaddr + SCBPort);
+		udelay(10);
+	}
+
+        iowrite32(0, ioaddr + SCBPointer);
+        ioread32(ioaddr + SCBPointer);			/* Flush to PCI. */
+        udelay(10);			/* Bogus, but it avoids the bug. */
+
+        /* Note: these next two operations can take a while. */
+        do_slow_command(dev, sp, RxAddrLoad);
+        do_slow_command(dev, sp, CUCmdBase);
+
+	/* Load the statistics block and rx ring addresses. */
+	iowrite32(sp->lstats_dma, ioaddr + SCBPointer);
+	ioread32(ioaddr + SCBPointer);			/* Flush to PCI */
+
+	iowrite8(CUStatsAddr, ioaddr + SCBCmd);
+	sp->lstats->done_marker = 0;
+	wait_for_cmd_done(dev, sp);
+
+	if (sp->rx_ringp[sp->cur_rx % RX_RING_SIZE] == NULL) {
+		if (netif_msg_rx_err(sp))
+			printk(KERN_DEBUG "%s: NULL cur_rx in speedo_resume().\n",
+					dev->name);
+	} else {
+		iowrite32(sp->rx_ring_dma[sp->cur_rx % RX_RING_SIZE],
+			 ioaddr + SCBPointer);
+		ioread32(ioaddr + SCBPointer);		/* Flush to PCI */
+	}
+
+	/* Note: RxStart should complete instantly. */
+	do_slow_command(dev, sp, RxStart);
+	do_slow_command(dev, sp, CUDumpStats);
+
+	/* Fill the first command with our physical address. */
+	{
+		struct descriptor *ias_cmd;
+
+		ias_cmd =
+			(struct descriptor *)&sp->tx_ring[sp->cur_tx++ % TX_RING_SIZE];
+		/* Avoid a bug(?!) here by marking the command already completed. */
+		ias_cmd->cmd_status = cpu_to_le32((CmdSuspend | CmdIASetup) | 0xa000);
+		ias_cmd->link =
+			cpu_to_le32(TX_RING_ELEM_DMA(sp, sp->cur_tx % TX_RING_SIZE));
+		memcpy(ias_cmd->params, dev->dev_addr, 6);
+		if (sp->last_cmd)
+			clear_suspend(sp->last_cmd);
+		sp->last_cmd = ias_cmd;
+	}
+
+	/* Start the chip's Tx process and unmask interrupts. */
+	iowrite32(TX_RING_ELEM_DMA(sp, sp->dirty_tx % TX_RING_SIZE),
+		 ioaddr + SCBPointer);
+	/* We are not ACK-ing FCP and ER in the interrupt handler yet so they should
+	   remain masked --Dragan */
+	iowrite16(CUStart | SCBMaskEarlyRx | SCBMaskFlowCtl, ioaddr + SCBCmd);
+}
+
+/*
+ * Sometimes the receiver stops making progress.  This routine knows how to
+ * get it going again, without losing packets or being otherwise nasty like
+ * a chip reset would be.  Previously the driver had a whole sequence
+ * of if RxSuspended, if it's no buffers do one thing, if it's no resources,
+ * do another, etc.  But those things don't really matter.  Separate logic
+ * in the ISR provides for allocating buffers--the other half of operation
+ * is just making sure the receiver is active.  speedo_rx_soft_reset does that.
+ * This problem with the old, more involved algorithm is shown up under
+ * ping floods on the order of 60K packets/second on a 100Mbps fdx network.
+ */
+static void
+speedo_rx_soft_reset(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	struct RxFD *rfd;
+	void __iomem *ioaddr;
+
+	ioaddr = sp->regs;
+	if (wait_for_cmd_done(dev, sp) != 0) {
+		printk("%s: previous command stalled\n", dev->name);
+		return;
+	}
+	/*
+	* Put the hardware into a known state.
+	*/
+	iowrite8(RxAbort, ioaddr + SCBCmd);
+
+	rfd = sp->rx_ringp[sp->cur_rx % RX_RING_SIZE];
+
+	rfd->rx_buf_addr = 0xffffffff;
+
+	if (wait_for_cmd_done(dev, sp) != 0) {
+		printk("%s: RxAbort command stalled\n", dev->name);
+		return;
+	}
+	iowrite32(sp->rx_ring_dma[sp->cur_rx % RX_RING_SIZE],
+		ioaddr + SCBPointer);
+	iowrite8(RxStart, ioaddr + SCBCmd);
+}
+
+
+/* Media monitoring and control. */
+static void speedo_timer(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int phy_num = sp->phy[0] & 0x1f;
+
+	/* We have MII and lost link beat. */
+	if ((sp->phy[0] & 0x8000) == 0) {
+		int partner = mdio_read(dev, phy_num, MII_LPA);
+		if (partner != sp->partner) {
+			int flow_ctrl = sp->mii_if.advertising & partner & 0x0400 ? 1 : 0;
+			if (netif_msg_link(sp)) {
+				printk(KERN_DEBUG "%s: Link status change.\n", dev->name);
+				printk(KERN_DEBUG "%s: Old partner %x, new %x, adv %x.\n",
+					   dev->name, sp->partner, partner, sp->mii_if.advertising);
+			}
+			sp->partner = partner;
+			if (flow_ctrl != sp->flow_ctrl) {
+				sp->flow_ctrl = flow_ctrl;
+				sp->rx_mode = -1;	/* Trigger a reload. */
+			}
+		}
+	}
+	mii_check_link(&sp->mii_if);
+	if (netif_msg_timer(sp)) {
+		printk(KERN_DEBUG "%s: Media control tick, status %4.4x.\n",
+			   dev->name, ioread16(ioaddr + SCBStatus));
+	}
+	if (sp->rx_mode < 0  ||
+		(sp->rx_bug  && jiffies - sp->last_rx_time > 2*HZ)) {
+		/* We haven't received a packet in a Long Time.  We might have been
+		   bitten by the receiver hang bug.  This can be cleared by sending
+		   a set multicast list command. */
+		if (netif_msg_timer(sp))
+			printk(KERN_DEBUG "%s: Sending a multicast list set command"
+				   " from a timer routine,"
+				   " m=%d, j=%ld, l=%ld.\n",
+				   dev->name, sp->rx_mode, jiffies, sp->last_rx_time);
+		set_rx_mode(dev);
+	}
+	/* We must continue to monitor the media. */
+	sp->timer.expires = RUN_AT(2*HZ); 			/* 2.0 sec. */
+	add_timer(&sp->timer);
+}
+
+static void speedo_show_state(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	int i;
+
+	if (netif_msg_pktdata(sp)) {
+		printk(KERN_DEBUG "%s: Tx ring dump,  Tx queue %u / %u:\n", 
+		    dev->name, sp->cur_tx, sp->dirty_tx);
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk(KERN_DEBUG "%s:  %c%c%2d %8.8x.\n", dev->name,
+			    i == sp->dirty_tx % TX_RING_SIZE ? '*' : ' ',
+			    i == sp->cur_tx % TX_RING_SIZE ? '=' : ' ',
+			    i, sp->tx_ring[i].status);
+
+		printk(KERN_DEBUG "%s: Printing Rx ring"
+		    " (next to receive into %u, dirty index %u).\n",
+		    dev->name, sp->cur_rx, sp->dirty_rx);
+		for (i = 0; i < RX_RING_SIZE; i++)
+			printk(KERN_DEBUG "%s: %c%c%c%2d %8.8x.\n", dev->name,
+			    sp->rx_ringp[i] == sp->last_rxf ? 'l' : ' ',
+			    i == sp->dirty_rx % RX_RING_SIZE ? '*' : ' ',
+			    i == sp->cur_rx % RX_RING_SIZE ? '=' : ' ',
+			    i, (sp->rx_ringp[i] != NULL) ?
+			    (unsigned)sp->rx_ringp[i]->status : 0);
+	}
+
+#if 0
+	{
+		void __iomem *ioaddr = sp->regs;
+		int phy_num = sp->phy[0] & 0x1f;
+		for (i = 0; i < 16; i++) {
+			/* FIXME: what does it mean?  --SAW */
+			if (i == 6) i = 21;
+			printk(KERN_DEBUG "%s:  PHY index %d register %d is %4.4x.\n",
+				   dev->name, phy_num, i, mdio_read(dev, phy_num, i));
+		}
+	}
+#endif
+
+}
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void
+speedo_init_rx_ring(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	struct RxFD *rxf, *last_rxf = NULL;
+	dma_addr_t last_rxf_dma = 0 /* to shut up the compiler */;
+	int i;
+
+	sp->cur_rx = 0;
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb;
+		skb = dev_alloc_skb(PKT_BUF_SZ + sizeof(struct RxFD));
+		/* XXX: do we really want to call this before the NULL check? --hch */
+		rx_align(skb);			/* Align IP on 16 byte boundary */
+		sp->rx_skbuff[i] = skb;
+		if (skb == NULL)
+			break;			/* OK.  Just initially short of Rx bufs. */
+		skb->dev = dev;			/* Mark as being used by this device. */
+		rxf = (struct RxFD *)skb->tail;
+		sp->rx_ringp[i] = rxf;
+		sp->rx_ring_dma[i] =
+			pci_map_single(sp->pdev, rxf,
+					PKT_BUF_SZ + sizeof(struct RxFD), PCI_DMA_BIDIRECTIONAL);
+		skb_reserve(skb, sizeof(struct RxFD));
+		if (last_rxf) {
+			last_rxf->link = cpu_to_le32(sp->rx_ring_dma[i]);
+			pci_dma_sync_single_for_device(sp->pdev, last_rxf_dma,
+										   sizeof(struct RxFD), PCI_DMA_TODEVICE);
+		}
+		last_rxf = rxf;
+		last_rxf_dma = sp->rx_ring_dma[i];
+		rxf->status = cpu_to_le32(0x00000001);	/* '1' is flag value only. */
+		rxf->link = 0;						/* None yet. */
+		/* This field unused by i82557. */
+		rxf->rx_buf_addr = 0xffffffff;
+		rxf->count = cpu_to_le32(PKT_BUF_SZ << 16);
+		pci_dma_sync_single_for_device(sp->pdev, sp->rx_ring_dma[i],
+									   sizeof(struct RxFD), PCI_DMA_TODEVICE);
+	}
+	sp->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+	/* Mark the last entry as end-of-list. */
+	last_rxf->status = cpu_to_le32(0xC0000002);	/* '2' is flag value only. */
+	pci_dma_sync_single_for_device(sp->pdev, sp->rx_ring_dma[RX_RING_SIZE-1],
+								   sizeof(struct RxFD), PCI_DMA_TODEVICE);
+	sp->last_rxf = last_rxf;
+	sp->last_rxf_dma = last_rxf_dma;
+}
+
+static void speedo_purge_tx(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	int entry;
+
+	while ((int)(sp->cur_tx - sp->dirty_tx) > 0) {
+		entry = sp->dirty_tx % TX_RING_SIZE;
+		if (sp->tx_skbuff[entry]) {
+			sp->stats.tx_errors++;
+			pci_unmap_single(sp->pdev,
+					le32_to_cpu(sp->tx_ring[entry].tx_buf_addr0),
+					sp->tx_skbuff[entry]->len, PCI_DMA_TODEVICE);
+			dev_kfree_skb_irq(sp->tx_skbuff[entry]);
+			sp->tx_skbuff[entry] = NULL;
+		}
+		sp->dirty_tx++;
+	}
+	while (sp->mc_setup_head != NULL) {
+		struct speedo_mc_block *t;
+		if (netif_msg_tx_err(sp))
+			printk(KERN_DEBUG "%s: freeing mc frame.\n", dev->name);
+		pci_unmap_single(sp->pdev, sp->mc_setup_head->frame_dma,
+				sp->mc_setup_head->len, PCI_DMA_TODEVICE);
+		t = sp->mc_setup_head->next;
+		kfree(sp->mc_setup_head);
+		sp->mc_setup_head = t;
+	}
+	sp->mc_setup_tail = NULL;
+	sp->tx_full = 0;
+	netif_wake_queue(dev);
+}
+
+static void reset_mii(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+
+	/* Reset the MII transceiver, suggested by Fred Young @ scalable.com. */
+	if ((sp->phy[0] & 0x8000) == 0) {
+		int phy_addr = sp->phy[0] & 0x1f;
+		int advertising = mdio_read(dev, phy_addr, MII_ADVERTISE);
+		int mii_bmcr = mdio_read(dev, phy_addr, MII_BMCR);
+		mdio_write(dev, phy_addr, MII_BMCR, 0x0400);
+		mdio_write(dev, phy_addr, MII_BMSR, 0x0000);
+		mdio_write(dev, phy_addr, MII_ADVERTISE, 0x0000);
+		mdio_write(dev, phy_addr, MII_BMCR, 0x8000);
+#ifdef honor_default_port
+		mdio_write(dev, phy_addr, MII_BMCR, mii_ctrl[dev->default_port & 7]);
+#else
+		mdio_read(dev, phy_addr, MII_BMCR);
+		mdio_write(dev, phy_addr, MII_BMCR, mii_bmcr);
+		mdio_write(dev, phy_addr, MII_ADVERTISE, advertising);
+#endif
+	}
+}
+
+static void speedo_tx_timeout(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int status = ioread16(ioaddr + SCBStatus);
+	unsigned long flags;
+
+	if (netif_msg_tx_err(sp)) {
+		printk(KERN_WARNING "%s: Transmit timed out: status %4.4x "
+		   " %4.4x at %d/%d command %8.8x.\n",
+		   dev->name, status, ioread16(ioaddr + SCBCmd),
+		   sp->dirty_tx, sp->cur_tx,
+		   sp->tx_ring[sp->dirty_tx % TX_RING_SIZE].status);
+
+	}
+	speedo_show_state(dev);
+#if 0
+	if ((status & 0x00C0) != 0x0080
+		&&  (status & 0x003C) == 0x0010) {
+		/* Only the command unit has stopped. */
+		printk(KERN_WARNING "%s: Trying to restart the transmitter...\n",
+			   dev->name);
+		iowrite32(TX_RING_ELEM_DMA(sp, dirty_tx % TX_RING_SIZE]),
+			 ioaddr + SCBPointer);
+		iowrite16(CUStart, ioaddr + SCBCmd);
+		reset_mii(dev);
+	} else {
+#else
+	{
+#endif
+		del_timer_sync(&sp->timer);
+		/* Reset the Tx and Rx units. */
+		iowrite32(PortReset, ioaddr + SCBPort);
+		/* We may get spurious interrupts here.  But I don't think that they
+		   may do much harm.  1999/12/09 SAW */
+		udelay(10);
+		/* Disable interrupts. */
+		iowrite16(SCBMaskAll, ioaddr + SCBCmd);
+		synchronize_irq(dev->irq);
+		speedo_tx_buffer_gc(dev);
+		/* Free as much as possible.
+		   It helps to recover from a hang because of out-of-memory.
+		   It also simplifies speedo_resume() in case TX ring is full or
+		   close-to-be full. */
+		speedo_purge_tx(dev);
+		speedo_refill_rx_buffers(dev, 1);
+		spin_lock_irqsave(&sp->lock, flags);
+		speedo_resume(dev);
+		sp->rx_mode = -1;
+		dev->trans_start = jiffies;
+		spin_unlock_irqrestore(&sp->lock, flags);
+		set_rx_mode(dev); /* it takes the spinlock itself --SAW */
+		/* Reset MII transceiver.  Do it before starting the timer to serialize
+		   mdio_xxx operations.  Yes, it's a paranoya :-)  2000/05/09 SAW */
+		reset_mii(dev);
+		sp->timer.expires = RUN_AT(2*HZ);
+		add_timer(&sp->timer);
+	}
+	return;
+}
+
+static int
+speedo_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int entry;
+
+	/* Prevent interrupts from changing the Tx ring from underneath us. */
+	unsigned long flags;
+
+	spin_lock_irqsave(&sp->lock, flags);
+
+	/* Check if there are enough space. */
+	if ((int)(sp->cur_tx - sp->dirty_tx) >= TX_QUEUE_LIMIT) {
+		printk(KERN_ERR "%s: incorrect tbusy state, fixed.\n", dev->name);
+		netif_stop_queue(dev);
+		sp->tx_full = 1;
+		spin_unlock_irqrestore(&sp->lock, flags);
+		return 1;
+	}
+
+	/* Calculate the Tx descriptor entry. */
+	entry = sp->cur_tx++ % TX_RING_SIZE;
+
+	sp->tx_skbuff[entry] = skb;
+	sp->tx_ring[entry].status =
+		cpu_to_le32(CmdSuspend | CmdTx | CmdTxFlex);
+	if (!(entry & ((TX_RING_SIZE>>2)-1)))
+		sp->tx_ring[entry].status |= cpu_to_le32(CmdIntr);
+	sp->tx_ring[entry].link =
+		cpu_to_le32(TX_RING_ELEM_DMA(sp, sp->cur_tx % TX_RING_SIZE));
+	sp->tx_ring[entry].tx_desc_addr =
+		cpu_to_le32(TX_RING_ELEM_DMA(sp, entry) + TX_DESCR_BUF_OFFSET);
+	/* The data region is always in one buffer descriptor. */
+	sp->tx_ring[entry].count = cpu_to_le32(sp->tx_threshold);
+	sp->tx_ring[entry].tx_buf_addr0 =
+		cpu_to_le32(pci_map_single(sp->pdev, skb->data,
+					   skb->len, PCI_DMA_TODEVICE));
+	sp->tx_ring[entry].tx_buf_size0 = cpu_to_le32(skb->len);
+
+	/* workaround for hardware bug on 10 mbit half duplex */
+
+	if ((sp->partner == 0) && (sp->chip_id == 1)) {
+		wait_for_cmd_done(dev, sp);
+		iowrite8(0 , ioaddr + SCBCmd);
+		udelay(1);
+	}
+
+	/* Trigger the command unit resume. */
+	wait_for_cmd_done(dev, sp);
+	clear_suspend(sp->last_cmd);
+	/* We want the time window between clearing suspend flag on the previous
+	   command and resuming CU to be as small as possible.
+	   Interrupts in between are very undesired.  --SAW */
+	iowrite8(CUResume, ioaddr + SCBCmd);
+	sp->last_cmd = (struct descriptor *)&sp->tx_ring[entry];
+
+	/* Leave room for set_rx_mode(). If there is no more space than reserved
+	   for multicast filter mark the ring as full. */
+	if ((int)(sp->cur_tx - sp->dirty_tx) >= TX_QUEUE_LIMIT) {
+		netif_stop_queue(dev);
+		sp->tx_full = 1;
+	}
+
+	spin_unlock_irqrestore(&sp->lock, flags);
+
+	dev->trans_start = jiffies;
+
+	return 0;
+}
+
+static void speedo_tx_buffer_gc(struct net_device *dev)
+{
+	unsigned int dirty_tx;
+	struct speedo_private *sp = netdev_priv(dev);
+
+	dirty_tx = sp->dirty_tx;
+	while ((int)(sp->cur_tx - dirty_tx) > 0) {
+		int entry = dirty_tx % TX_RING_SIZE;
+		int status = le32_to_cpu(sp->tx_ring[entry].status);
+
+		if (netif_msg_tx_done(sp))
+			printk(KERN_DEBUG " scavenge candidate %d status %4.4x.\n",
+				   entry, status);
+		if ((status & StatusComplete) == 0)
+			break;			/* It still hasn't been processed. */
+		if (status & TxUnderrun)
+			if (sp->tx_threshold < 0x01e08000) {
+				if (netif_msg_tx_err(sp))
+					printk(KERN_DEBUG "%s: TX underrun, threshold adjusted.\n",
+						   dev->name);
+				sp->tx_threshold += 0x00040000;
+			}
+		/* Free the original skb. */
+		if (sp->tx_skbuff[entry]) {
+			sp->stats.tx_packets++;	/* Count only user packets. */
+			sp->stats.tx_bytes += sp->tx_skbuff[entry]->len;
+			pci_unmap_single(sp->pdev,
+					le32_to_cpu(sp->tx_ring[entry].tx_buf_addr0),
+					sp->tx_skbuff[entry]->len, PCI_DMA_TODEVICE);
+			dev_kfree_skb_irq(sp->tx_skbuff[entry]);
+			sp->tx_skbuff[entry] = NULL;
+		}
+		dirty_tx++;
+	}
+
+	if (netif_msg_tx_err(sp) && (int)(sp->cur_tx - dirty_tx) > TX_RING_SIZE) {
+		printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d,"
+			   " full=%d.\n",
+			   dirty_tx, sp->cur_tx, sp->tx_full);
+		dirty_tx += TX_RING_SIZE;
+	}
+
+	while (sp->mc_setup_head != NULL
+		   && (int)(dirty_tx - sp->mc_setup_head->tx - 1) > 0) {
+		struct speedo_mc_block *t;
+		if (netif_msg_tx_err(sp))
+			printk(KERN_DEBUG "%s: freeing mc frame.\n", dev->name);
+		pci_unmap_single(sp->pdev, sp->mc_setup_head->frame_dma,
+				sp->mc_setup_head->len, PCI_DMA_TODEVICE);
+		t = sp->mc_setup_head->next;
+		kfree(sp->mc_setup_head);
+		sp->mc_setup_head = t;
+	}
+	if (sp->mc_setup_head == NULL)
+		sp->mc_setup_tail = NULL;
+
+	sp->dirty_tx = dirty_tx;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+static irqreturn_t speedo_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct net_device *dev = (struct net_device *)dev_instance;
+	struct speedo_private *sp;
+	void __iomem *ioaddr;
+	long boguscnt = max_interrupt_work;
+	unsigned short status;
+	unsigned int handled = 0;
+
+	sp = netdev_priv(dev);
+	ioaddr = sp->regs;
+
+#ifndef final_version
+	/* A lock to prevent simultaneous entry on SMP machines. */
+	if (test_and_set_bit(0, (void*)&sp->in_interrupt)) {
+		printk(KERN_ERR"%s: SMP simultaneous entry of an interrupt handler.\n",
+			   dev->name);
+		sp->in_interrupt = 0;	/* Avoid halting machine. */
+		return IRQ_NONE;
+	}
+#endif
+
+	do {
+		status = ioread16(ioaddr + SCBStatus);
+		/* Acknowledge all of the current interrupt sources ASAP. */
+		/* Will change from 0xfc00 to 0xff00 when we start handling
+		   FCP and ER interrupts --Dragan */
+		iowrite16(status & 0xfc00, ioaddr + SCBStatus);
+
+		if (netif_msg_intr(sp))
+			printk(KERN_DEBUG "%s: interrupt  status=%#4.4x.\n",
+				   dev->name, status);
+
+		if ((status & 0xfc00) == 0)
+			break;
+		handled = 1;
+
+
+		if ((status & 0x5000) ||	/* Packet received, or Rx error. */
+			(sp->rx_ring_state&(RrNoMem|RrPostponed)) == RrPostponed)
+									/* Need to gather the postponed packet. */
+			speedo_rx(dev);
+
+		/* Always check if all rx buffers are allocated.  --SAW */
+		speedo_refill_rx_buffers(dev, 0);
+		
+		spin_lock(&sp->lock);
+		/*
+		 * The chip may have suspended reception for various reasons.
+		 * Check for that, and re-prime it should this be the case.
+		 */
+		switch ((status >> 2) & 0xf) {
+		case 0: /* Idle */
+			break;
+		case 1:	/* Suspended */
+		case 2:	/* No resources (RxFDs) */
+		case 9:	/* Suspended with no more RBDs */
+		case 10: /* No resources due to no RBDs */
+		case 12: /* Ready with no RBDs */
+			speedo_rx_soft_reset(dev);
+			break;
+		case 3:  case 5:  case 6:  case 7:  case 8:
+		case 11:  case 13:  case 14:  case 15:
+			/* these are all reserved values */
+			break;
+		}
+		
+		
+		/* User interrupt, Command/Tx unit interrupt or CU not active. */
+		if (status & 0xA400) {
+			speedo_tx_buffer_gc(dev);
+			if (sp->tx_full
+				&& (int)(sp->cur_tx - sp->dirty_tx) < TX_QUEUE_UNFULL) {
+				/* The ring is no longer full. */
+				sp->tx_full = 0;
+				netif_wake_queue(dev); /* Attention: under a spinlock.  --SAW */
+			}
+		}
+		
+		spin_unlock(&sp->lock);
+
+		if (--boguscnt < 0) {
+			printk(KERN_ERR "%s: Too much work at interrupt, status=0x%4.4x.\n",
+				   dev->name, status);
+			/* Clear all interrupt sources. */
+			/* Will change from 0xfc00 to 0xff00 when we start handling
+			   FCP and ER interrupts --Dragan */
+			iowrite16(0xfc00, ioaddr + SCBStatus);
+			break;
+		}
+	} while (1);
+
+	if (netif_msg_intr(sp))
+		printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
+			   dev->name, ioread16(ioaddr + SCBStatus));
+
+	clear_bit(0, (void*)&sp->in_interrupt);
+	return IRQ_RETVAL(handled);
+}
+
+static inline struct RxFD *speedo_rx_alloc(struct net_device *dev, int entry)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	struct RxFD *rxf;
+	struct sk_buff *skb;
+	/* Get a fresh skbuff to replace the consumed one. */
+	skb = dev_alloc_skb(PKT_BUF_SZ + sizeof(struct RxFD));
+	/* XXX: do we really want to call this before the NULL check? --hch */
+	rx_align(skb);				/* Align IP on 16 byte boundary */
+	sp->rx_skbuff[entry] = skb;
+	if (skb == NULL) {
+		sp->rx_ringp[entry] = NULL;
+		return NULL;
+	}
+	rxf = sp->rx_ringp[entry] = (struct RxFD *)skb->tail;
+	sp->rx_ring_dma[entry] =
+		pci_map_single(sp->pdev, rxf,
+					   PKT_BUF_SZ + sizeof(struct RxFD), PCI_DMA_FROMDEVICE);
+	skb->dev = dev;
+	skb_reserve(skb, sizeof(struct RxFD));
+	rxf->rx_buf_addr = 0xffffffff;
+	pci_dma_sync_single_for_device(sp->pdev, sp->rx_ring_dma[entry],
+								   sizeof(struct RxFD), PCI_DMA_TODEVICE);
+	return rxf;
+}
+
+static inline void speedo_rx_link(struct net_device *dev, int entry,
+								  struct RxFD *rxf, dma_addr_t rxf_dma)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	rxf->status = cpu_to_le32(0xC0000001); 	/* '1' for driver use only. */
+	rxf->link = 0;			/* None yet. */
+	rxf->count = cpu_to_le32(PKT_BUF_SZ << 16);
+	sp->last_rxf->link = cpu_to_le32(rxf_dma);
+	sp->last_rxf->status &= cpu_to_le32(~0xC0000000);
+	pci_dma_sync_single_for_device(sp->pdev, sp->last_rxf_dma,
+								   sizeof(struct RxFD), PCI_DMA_TODEVICE);
+	sp->last_rxf = rxf;
+	sp->last_rxf_dma = rxf_dma;
+}
+
+static int speedo_refill_rx_buf(struct net_device *dev, int force)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	int entry;
+	struct RxFD *rxf;
+
+	entry = sp->dirty_rx % RX_RING_SIZE;
+	if (sp->rx_skbuff[entry] == NULL) {
+		rxf = speedo_rx_alloc(dev, entry);
+		if (rxf == NULL) {
+			unsigned int forw;
+			int forw_entry;
+			if (netif_msg_rx_err(sp) || !(sp->rx_ring_state & RrOOMReported)) {
+				printk(KERN_WARNING "%s: can't fill rx buffer (force %d)!\n",
+						dev->name, force);
+				sp->rx_ring_state |= RrOOMReported;
+			}
+			speedo_show_state(dev);
+			if (!force)
+				return -1;	/* Better luck next time!  */
+			/* Borrow an skb from one of next entries. */
+			for (forw = sp->dirty_rx + 1; forw != sp->cur_rx; forw++)
+				if (sp->rx_skbuff[forw % RX_RING_SIZE] != NULL)
+					break;
+			if (forw == sp->cur_rx)
+				return -1;
+			forw_entry = forw % RX_RING_SIZE;
+			sp->rx_skbuff[entry] = sp->rx_skbuff[forw_entry];
+			sp->rx_skbuff[forw_entry] = NULL;
+			rxf = sp->rx_ringp[forw_entry];
+			sp->rx_ringp[forw_entry] = NULL;
+			sp->rx_ringp[entry] = rxf;
+		}
+	} else {
+		rxf = sp->rx_ringp[entry];
+	}
+	speedo_rx_link(dev, entry, rxf, sp->rx_ring_dma[entry]);
+	sp->dirty_rx++;
+	sp->rx_ring_state &= ~(RrNoMem|RrOOMReported); /* Mark the progress. */
+	return 0;
+}
+
+static void speedo_refill_rx_buffers(struct net_device *dev, int force)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+
+	/* Refill the RX ring. */
+	while ((int)(sp->cur_rx - sp->dirty_rx) > 0 &&
+			speedo_refill_rx_buf(dev, force) != -1);
+}
+
+static int
+speedo_rx(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	int entry = sp->cur_rx % RX_RING_SIZE;
+	int rx_work_limit = sp->dirty_rx + RX_RING_SIZE - sp->cur_rx;
+	int alloc_ok = 1;
+	int npkts = 0;
+
+	if (netif_msg_intr(sp))
+		printk(KERN_DEBUG " In speedo_rx().\n");
+	/* If we own the next entry, it's a new packet. Send it up. */
+	while (sp->rx_ringp[entry] != NULL) {
+		int status;
+		int pkt_len;
+
+		pci_dma_sync_single_for_cpu(sp->pdev, sp->rx_ring_dma[entry],
+									sizeof(struct RxFD), PCI_DMA_FROMDEVICE);
+		status = le32_to_cpu(sp->rx_ringp[entry]->status);
+		pkt_len = le32_to_cpu(sp->rx_ringp[entry]->count) & 0x3fff;
+
+		if (!(status & RxComplete))
+			break;
+
+		if (--rx_work_limit < 0)
+			break;
+
+		/* Check for a rare out-of-memory case: the current buffer is
+		   the last buffer allocated in the RX ring.  --SAW */
+		if (sp->last_rxf == sp->rx_ringp[entry]) {
+			/* Postpone the packet.  It'll be reaped at an interrupt when this
+			   packet is no longer the last packet in the ring. */
+			if (netif_msg_rx_err(sp))
+				printk(KERN_DEBUG "%s: RX packet postponed!\n",
+					   dev->name);
+			sp->rx_ring_state |= RrPostponed;
+			break;
+		}
+
+		if (netif_msg_rx_status(sp))
+			printk(KERN_DEBUG "  speedo_rx() status %8.8x len %d.\n", status,
+				   pkt_len);
+		if ((status & (RxErrTooBig|RxOK|0x0f90)) != RxOK) {
+			if (status & RxErrTooBig)
+				printk(KERN_ERR "%s: Ethernet frame overran the Rx buffer, "
+					   "status %8.8x!\n", dev->name, status);
+			else if (! (status & RxOK)) {
+				/* There was a fatal error.  This *should* be impossible. */
+				sp->stats.rx_errors++;
+				printk(KERN_ERR "%s: Anomalous event in speedo_rx(), "
+					   "status %8.8x.\n",
+					   dev->name, status);
+			}
+		} else {
+			struct sk_buff *skb;
+
+			/* Check if the packet is long enough to just accept without
+			   copying to a properly sized skbuff. */
+			if (pkt_len < rx_copybreak
+				&& (skb = dev_alloc_skb(pkt_len + 2)) != 0) {
+				skb->dev = dev;
+				skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+				/* 'skb_put()' points to the start of sk_buff data area. */
+				pci_dma_sync_single_for_cpu(sp->pdev, sp->rx_ring_dma[entry],
+											sizeof(struct RxFD) + pkt_len,
+											PCI_DMA_FROMDEVICE);
+
+#if 1 || USE_IP_CSUM
+				/* Packet is in one chunk -- we can copy + cksum. */
+				eth_copy_and_sum(skb, sp->rx_skbuff[entry]->tail, pkt_len, 0);
+				skb_put(skb, pkt_len);
+#else
+				memcpy(skb_put(skb, pkt_len), sp->rx_skbuff[entry]->tail,
+					   pkt_len);
+#endif
+				pci_dma_sync_single_for_device(sp->pdev, sp->rx_ring_dma[entry],
+											   sizeof(struct RxFD) + pkt_len,
+											   PCI_DMA_FROMDEVICE);
+				npkts++;
+			} else {
+				/* Pass up the already-filled skbuff. */
+				skb = sp->rx_skbuff[entry];
+				if (skb == NULL) {
+					printk(KERN_ERR "%s: Inconsistent Rx descriptor chain.\n",
+						   dev->name);
+					break;
+				}
+				sp->rx_skbuff[entry] = NULL;
+				skb_put(skb, pkt_len);
+				npkts++;
+				sp->rx_ringp[entry] = NULL;
+				pci_unmap_single(sp->pdev, sp->rx_ring_dma[entry],
+								 PKT_BUF_SZ + sizeof(struct RxFD),
+								 PCI_DMA_FROMDEVICE);
+			}
+			skb->protocol = eth_type_trans(skb, dev);
+			netif_rx(skb);
+			dev->last_rx = jiffies;
+			sp->stats.rx_packets++;
+			sp->stats.rx_bytes += pkt_len;
+		}
+		entry = (++sp->cur_rx) % RX_RING_SIZE;
+		sp->rx_ring_state &= ~RrPostponed;
+		/* Refill the recently taken buffers.
+		   Do it one-by-one to handle traffic bursts better. */
+		if (alloc_ok && speedo_refill_rx_buf(dev, 0) == -1)
+			alloc_ok = 0;
+	}
+
+	/* Try hard to refill the recently taken buffers. */
+	speedo_refill_rx_buffers(dev, 1);
+
+	if (npkts)
+		sp->last_rx_time = jiffies;
+
+	return 0;
+}
+
+static int
+speedo_close(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	int i;
+
+	netdevice_stop(dev);
+	netif_stop_queue(dev);
+
+	if (netif_msg_ifdown(sp))
+		printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
+			   dev->name, ioread16(ioaddr + SCBStatus));
+
+	/* Shut off the media monitoring timer. */
+	del_timer_sync(&sp->timer);
+
+	iowrite16(SCBMaskAll, ioaddr + SCBCmd);
+
+	/* Shutting down the chip nicely fails to disable flow control. So.. */
+	iowrite32(PortPartialReset, ioaddr + SCBPort);
+	ioread32(ioaddr + SCBPort); /* flush posted write */
+	/*
+	 * The chip requires a 10 microsecond quiet period.  Wait here!
+	 */
+	udelay(10);
+
+	free_irq(dev->irq, dev);
+	speedo_show_state(dev);
+
+    /* Free all the skbuffs in the Rx and Tx queues. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb = sp->rx_skbuff[i];
+		sp->rx_skbuff[i] = NULL;
+		/* Clear the Rx descriptors. */
+		if (skb) {
+			pci_unmap_single(sp->pdev,
+					 sp->rx_ring_dma[i],
+					 PKT_BUF_SZ + sizeof(struct RxFD), PCI_DMA_FROMDEVICE);
+			dev_kfree_skb(skb);
+		}
+	}
+
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		struct sk_buff *skb = sp->tx_skbuff[i];
+		sp->tx_skbuff[i] = NULL;
+		/* Clear the Tx descriptors. */
+		if (skb) {
+			pci_unmap_single(sp->pdev,
+					 le32_to_cpu(sp->tx_ring[i].tx_buf_addr0),
+					 skb->len, PCI_DMA_TODEVICE);
+			dev_kfree_skb(skb);
+		}
+	}
+
+	/* Free multicast setting blocks. */
+	for (i = 0; sp->mc_setup_head != NULL; i++) {
+		struct speedo_mc_block *t;
+		t = sp->mc_setup_head->next;
+		kfree(sp->mc_setup_head);
+		sp->mc_setup_head = t;
+	}
+	sp->mc_setup_tail = NULL;
+	if (netif_msg_ifdown(sp))
+		printk(KERN_DEBUG "%s: %d multicast blocks dropped.\n", dev->name, i);
+
+	pci_set_power_state(sp->pdev, PCI_D2);
+
+	return 0;
+}
+
+/* The Speedo-3 has an especially awkward and unusable method of getting
+   statistics out of the chip.  It takes an unpredictable length of time
+   for the dump-stats command to complete.  To avoid a busy-wait loop we
+   update the stats with the previous dump results, and then trigger a
+   new dump.
+
+   Oh, and incoming frames are dropped while executing dump-stats!
+   */
+static struct net_device_stats *
+speedo_get_stats(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+
+	/* Update only if the previous dump finished. */
+	if (sp->lstats->done_marker == le32_to_cpu(0xA007)) {
+		sp->stats.tx_aborted_errors += le32_to_cpu(sp->lstats->tx_coll16_errs);
+		sp->stats.tx_window_errors += le32_to_cpu(sp->lstats->tx_late_colls);
+		sp->stats.tx_fifo_errors += le32_to_cpu(sp->lstats->tx_underruns);
+		sp->stats.tx_fifo_errors += le32_to_cpu(sp->lstats->tx_lost_carrier);
+		/*sp->stats.tx_deferred += le32_to_cpu(sp->lstats->tx_deferred);*/
+		sp->stats.collisions += le32_to_cpu(sp->lstats->tx_total_colls);
+		sp->stats.rx_crc_errors += le32_to_cpu(sp->lstats->rx_crc_errs);
+		sp->stats.rx_frame_errors += le32_to_cpu(sp->lstats->rx_align_errs);
+		sp->stats.rx_over_errors += le32_to_cpu(sp->lstats->rx_resource_errs);
+		sp->stats.rx_fifo_errors += le32_to_cpu(sp->lstats->rx_overrun_errs);
+		sp->stats.rx_length_errors += le32_to_cpu(sp->lstats->rx_runt_errs);
+		sp->lstats->done_marker = 0x0000;
+		if (netif_running(dev)) {
+			unsigned long flags;
+			/* Take a spinlock to make wait_for_cmd_done and sending the
+			   command atomic.  --SAW */
+			spin_lock_irqsave(&sp->lock, flags);
+			wait_for_cmd_done(dev, sp);
+			iowrite8(CUDumpStats, ioaddr + SCBCmd);
+			spin_unlock_irqrestore(&sp->lock, flags);
+		}
+	}
+	return &sp->stats;
+}
+
+static void speedo_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	strncpy(info->driver, "eepro100", sizeof(info->driver)-1);
+	strncpy(info->version, version, sizeof(info->version)-1);
+	if (sp->pdev)
+		strcpy(info->bus_info, pci_name(sp->pdev));
+}
+
+static int speedo_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	spin_lock_irq(&sp->lock);
+	mii_ethtool_gset(&sp->mii_if, ecmd);
+	spin_unlock_irq(&sp->lock);
+	return 0;
+}
+
+static int speedo_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	int res;
+	spin_lock_irq(&sp->lock);
+	res = mii_ethtool_sset(&sp->mii_if, ecmd);
+	spin_unlock_irq(&sp->lock);
+	return res;
+}
+
+static int speedo_nway_reset(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	return mii_nway_restart(&sp->mii_if);
+}
+
+static u32 speedo_get_link(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	return mii_link_ok(&sp->mii_if);
+}
+
+static u32 speedo_get_msglevel(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	return sp->msg_enable;
+}
+
+static void speedo_set_msglevel(struct net_device *dev, u32 v)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	sp->msg_enable = v;
+}
+
+static struct ethtool_ops ethtool_ops = {
+	.get_drvinfo = speedo_get_drvinfo,
+	.get_settings = speedo_get_settings,
+	.set_settings = speedo_set_settings,
+	.nway_reset = speedo_nway_reset,
+	.get_link = speedo_get_link,
+	.get_msglevel = speedo_get_msglevel,
+	.set_msglevel = speedo_set_msglevel,
+};
+
+static int speedo_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	struct mii_ioctl_data *data = if_mii(rq);
+	int phy = sp->phy[0] & 0x1f;
+	int saved_acpi;
+	int t;
+
+    switch(cmd) {
+	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
+		data->phy_id = phy;
+
+	case SIOCGMIIREG:		/* Read MII PHY register. */
+		/* FIXME: these operations need to be serialized with MDIO
+		   access from the timeout handler.
+		   They are currently serialized only with MDIO access from the
+		   timer routine.  2000/05/09 SAW */
+		saved_acpi = pci_set_power_state(sp->pdev, PCI_D0);
+		t = del_timer_sync(&sp->timer);
+		data->val_out = mdio_read(dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
+		if (t)
+			add_timer(&sp->timer); /* may be set to the past  --SAW */
+		pci_set_power_state(sp->pdev, saved_acpi);
+		return 0;
+
+	case SIOCSMIIREG:		/* Write MII PHY register. */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		saved_acpi = pci_set_power_state(sp->pdev, PCI_D0);
+		t = del_timer_sync(&sp->timer);
+		mdio_write(dev, data->phy_id, data->reg_num, data->val_in);
+		if (t)
+			add_timer(&sp->timer); /* may be set to the past  --SAW */
+		pci_set_power_state(sp->pdev, saved_acpi);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+/* Set or clear the multicast filter for this adaptor.
+   This is very ugly with Intel chips -- we usually have to execute an
+   entire configuration command, plus process a multicast command.
+   This is complicated.  We must put a large configuration command and
+   an arbitrarily-sized multicast command in the transmit list.
+   To minimize the disruption -- the previous command might have already
+   loaded the link -- we convert the current command block, normally a Tx
+   command, into a no-op and link it to the new command.
+*/
+static void set_rx_mode(struct net_device *dev)
+{
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+	struct descriptor *last_cmd;
+	char new_rx_mode;
+	unsigned long flags;
+	int entry, i;
+
+	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous. */
+		new_rx_mode = 3;
+	} else if ((dev->flags & IFF_ALLMULTI)  ||
+			   dev->mc_count > multicast_filter_limit) {
+		new_rx_mode = 1;
+	} else
+		new_rx_mode = 0;
+
+	if (netif_msg_rx_status(sp))
+		printk(KERN_DEBUG "%s: set_rx_mode %d -> %d\n", dev->name,
+				sp->rx_mode, new_rx_mode);
+
+	if ((int)(sp->cur_tx - sp->dirty_tx) > TX_RING_SIZE - TX_MULTICAST_SIZE) {
+	    /* The Tx ring is full -- don't add anything!  Hope the mode will be
+		 * set again later. */
+		sp->rx_mode = -1;
+		return;
+	}
+
+	if (new_rx_mode != sp->rx_mode) {
+		u8 *config_cmd_data;
+
+		spin_lock_irqsave(&sp->lock, flags);
+		entry = sp->cur_tx++ % TX_RING_SIZE;
+		last_cmd = sp->last_cmd;
+		sp->last_cmd = (struct descriptor *)&sp->tx_ring[entry];
+
+		sp->tx_skbuff[entry] = NULL;			/* Redundant. */
+		sp->tx_ring[entry].status = cpu_to_le32(CmdSuspend | CmdConfigure);
+		sp->tx_ring[entry].link =
+			cpu_to_le32(TX_RING_ELEM_DMA(sp, (entry + 1) % TX_RING_SIZE));
+		config_cmd_data = (void *)&sp->tx_ring[entry].tx_desc_addr;
+		/* Construct a full CmdConfig frame. */
+		memcpy(config_cmd_data, i82558_config_cmd, CONFIG_DATA_SIZE);
+		config_cmd_data[1] = (txfifo << 4) | rxfifo;
+		config_cmd_data[4] = rxdmacount;
+		config_cmd_data[5] = txdmacount + 0x80;
+		config_cmd_data[15] |= (new_rx_mode & 2) ? 1 : 0;
+		/* 0x80 doesn't disable FC 0x84 does.
+		   Disable Flow control since we are not ACK-ing any FC interrupts
+		   for now. --Dragan */
+		config_cmd_data[19] = 0x84;
+		config_cmd_data[19] |= sp->mii_if.full_duplex ? 0x40 : 0;
+		config_cmd_data[21] = (new_rx_mode & 1) ? 0x0D : 0x05;
+		if (sp->phy[0] & 0x8000) {			/* Use the AUI port instead. */
+			config_cmd_data[15] |= 0x80;
+			config_cmd_data[8] = 0;
+		}
+		/* Trigger the command unit resume. */
+		wait_for_cmd_done(dev, sp);
+		clear_suspend(last_cmd);
+		iowrite8(CUResume, ioaddr + SCBCmd);
+		if ((int)(sp->cur_tx - sp->dirty_tx) >= TX_QUEUE_LIMIT) {
+			netif_stop_queue(dev);
+			sp->tx_full = 1;
+		}
+		spin_unlock_irqrestore(&sp->lock, flags);
+	}
+
+	if (new_rx_mode == 0  &&  dev->mc_count < 4) {
+		/* The simple case of 0-3 multicast list entries occurs often, and
+		   fits within one tx_ring[] entry. */
+		struct dev_mc_list *mclist;
+		u16 *setup_params, *eaddrs;
+
+		spin_lock_irqsave(&sp->lock, flags);
+		entry = sp->cur_tx++ % TX_RING_SIZE;
+		last_cmd = sp->last_cmd;
+		sp->last_cmd = (struct descriptor *)&sp->tx_ring[entry];
+
+		sp->tx_skbuff[entry] = NULL;
+		sp->tx_ring[entry].status = cpu_to_le32(CmdSuspend | CmdMulticastList);
+		sp->tx_ring[entry].link =
+			cpu_to_le32(TX_RING_ELEM_DMA(sp, (entry + 1) % TX_RING_SIZE));
+		sp->tx_ring[entry].tx_desc_addr = 0; /* Really MC list count. */
+		setup_params = (u16 *)&sp->tx_ring[entry].tx_desc_addr;
+		*setup_params++ = cpu_to_le16(dev->mc_count*6);
+		/* Fill in the multicast addresses. */
+		for (i = 0, mclist = dev->mc_list; i < dev->mc_count;
+			 i++, mclist = mclist->next) {
+			eaddrs = (u16 *)mclist->dmi_addr;
+			*setup_params++ = *eaddrs++;
+			*setup_params++ = *eaddrs++;
+			*setup_params++ = *eaddrs++;
+		}
+
+		wait_for_cmd_done(dev, sp);
+		clear_suspend(last_cmd);
+		/* Immediately trigger the command unit resume. */
+		iowrite8(CUResume, ioaddr + SCBCmd);
+
+		if ((int)(sp->cur_tx - sp->dirty_tx) >= TX_QUEUE_LIMIT) {
+			netif_stop_queue(dev);
+			sp->tx_full = 1;
+		}
+		spin_unlock_irqrestore(&sp->lock, flags);
+	} else if (new_rx_mode == 0) {
+		struct dev_mc_list *mclist;
+		u16 *setup_params, *eaddrs;
+		struct speedo_mc_block *mc_blk;
+		struct descriptor *mc_setup_frm;
+		int i;
+
+		mc_blk = kmalloc(sizeof(*mc_blk) + 2 + multicast_filter_limit*6,
+						 GFP_ATOMIC);
+		if (mc_blk == NULL) {
+			printk(KERN_ERR "%s: Failed to allocate a setup frame.\n",
+				   dev->name);
+			sp->rx_mode = -1; /* We failed, try again. */
+			return;
+		}
+		mc_blk->next = NULL;
+		mc_blk->len = 2 + multicast_filter_limit*6;
+		mc_blk->frame_dma =
+			pci_map_single(sp->pdev, &mc_blk->frame, mc_blk->len,
+					PCI_DMA_TODEVICE);
+		mc_setup_frm = &mc_blk->frame;
+
+		/* Fill the setup frame. */
+		if (netif_msg_ifup(sp))
+			printk(KERN_DEBUG "%s: Constructing a setup frame at %p.\n",
+				   dev->name, mc_setup_frm);
+		mc_setup_frm->cmd_status =
+			cpu_to_le32(CmdSuspend | CmdIntr | CmdMulticastList);
+		/* Link set below. */
+		setup_params = (u16 *)&mc_setup_frm->params;
+		*setup_params++ = cpu_to_le16(dev->mc_count*6);
+		/* Fill in the multicast addresses. */
+		for (i = 0, mclist = dev->mc_list; i < dev->mc_count;
+			 i++, mclist = mclist->next) {
+			eaddrs = (u16 *)mclist->dmi_addr;
+			*setup_params++ = *eaddrs++;
+			*setup_params++ = *eaddrs++;
+			*setup_params++ = *eaddrs++;
+		}
+
+		/* Disable interrupts while playing with the Tx Cmd list. */
+		spin_lock_irqsave(&sp->lock, flags);
+
+		if (sp->mc_setup_tail)
+			sp->mc_setup_tail->next = mc_blk;
+		else
+			sp->mc_setup_head = mc_blk;
+		sp->mc_setup_tail = mc_blk;
+		mc_blk->tx = sp->cur_tx;
+
+		entry = sp->cur_tx++ % TX_RING_SIZE;
+		last_cmd = sp->last_cmd;
+		sp->last_cmd = mc_setup_frm;
+
+		/* Change the command to a NoOp, pointing to the CmdMulti command. */
+		sp->tx_skbuff[entry] = NULL;
+		sp->tx_ring[entry].status = cpu_to_le32(CmdNOp);
+		sp->tx_ring[entry].link = cpu_to_le32(mc_blk->frame_dma);
+
+		/* Set the link in the setup frame. */
+		mc_setup_frm->link =
+			cpu_to_le32(TX_RING_ELEM_DMA(sp, (entry + 1) % TX_RING_SIZE));
+
+		pci_dma_sync_single_for_device(sp->pdev, mc_blk->frame_dma,
+									   mc_blk->len, PCI_DMA_TODEVICE);
+
+		wait_for_cmd_done(dev, sp);
+		clear_suspend(last_cmd);
+		/* Immediately trigger the command unit resume. */
+		iowrite8(CUResume, ioaddr + SCBCmd);
+
+		if ((int)(sp->cur_tx - sp->dirty_tx) >= TX_QUEUE_LIMIT) {
+			netif_stop_queue(dev);
+			sp->tx_full = 1;
+		}
+		spin_unlock_irqrestore(&sp->lock, flags);
+
+		if (netif_msg_rx_status(sp))
+			printk(" CmdMCSetup frame length %d in entry %d.\n",
+				   dev->mc_count, entry);
+	}
+
+	sp->rx_mode = new_rx_mode;
+}
+
+#ifdef CONFIG_PM
+static int eepro100_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct net_device *dev = pci_get_drvdata (pdev);
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+
+	pci_save_state(pdev);
+
+	if (!netif_running(dev))
+		return 0;
+		
+	del_timer_sync(&sp->timer);
+
+	netif_device_detach(dev);
+	iowrite32(PortPartialReset, ioaddr + SCBPort);
+	
+	/* XXX call pci_set_power_state ()? */
+	pci_disable_device(pdev);
+	pci_set_power_state (pdev, PCI_D3hot);
+	return 0;
+}
+
+static int eepro100_resume(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata (pdev);
+	struct speedo_private *sp = netdev_priv(dev);
+	void __iomem *ioaddr = sp->regs;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+	pci_enable_device(pdev);
+	pci_set_master(pdev);
+
+	if (!netif_running(dev))
+		return 0;
+
+	/* I'm absolutely uncertain if this part of code may work.
+	   The problems are:
+	    - correct hardware reinitialization;
+		- correct driver behavior between different steps of the
+		  reinitialization;
+		- serialization with other driver calls.
+	   2000/03/08  SAW */
+	iowrite16(SCBMaskAll, ioaddr + SCBCmd);
+	speedo_resume(dev);
+	netif_device_attach(dev);
+	sp->rx_mode = -1;
+	sp->flow_ctrl = sp->partner = 0;
+	set_rx_mode(dev);
+	sp->timer.expires = RUN_AT(2*HZ);
+	add_timer(&sp->timer);
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+static void __devexit eepro100_remove_one (struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata (pdev);
+	struct speedo_private *sp = netdev_priv(dev);
+	
+	unregister_netdev(dev);
+
+	release_region(pci_resource_start(pdev, 1), pci_resource_len(pdev, 1));
+	release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
+
+	pci_iounmap(pdev, sp->regs);
+	pci_free_consistent(pdev, TX_RING_SIZE * sizeof(struct TxFD)
+								+ sizeof(struct speedo_stats),
+						sp->tx_ring, sp->tx_ring_dma);
+	pci_disable_device(pdev);
+	free_netdev(dev);
+}
+
+static struct pci_device_id eepro100_pci_tbl[] = {
+	{ PCI_VENDOR_ID_INTEL, 0x1229, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1209, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1029, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1030, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1031, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1032, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1033, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1034, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1035, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1036, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1037, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1038, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1039, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x103A, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x103B, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x103C, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x103D, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x103E, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1050, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1059, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x1227, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x2449, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x2459, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x245D, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x5200, PCI_ANY_ID, PCI_ANY_ID, },
+	{ PCI_VENDOR_ID_INTEL, 0x5201, PCI_ANY_ID, PCI_ANY_ID, },
+	{ 0,}
+};
+MODULE_DEVICE_TABLE(pci, eepro100_pci_tbl);
+	
+static struct pci_driver eepro100_driver = {
+	.name		= "eepro100",
+	.id_table	= eepro100_pci_tbl,
+	.probe		= eepro100_init_one,
+	.remove		= __devexit_p(eepro100_remove_one),
+#ifdef CONFIG_PM
+	.suspend	= eepro100_suspend,
+	.resume		= eepro100_resume,
+#endif /* CONFIG_PM */
+};
+
+static int __init eepro100_init_module(void)
+{
+#ifdef MODULE
+	printk(version);
+#endif
+	return pci_module_init(&eepro100_driver);
+}
+
+static void __exit eepro100_cleanup_module(void)
+{
+	pci_unregister_driver(&eepro100_driver);
+}
+
+module_init(eepro100_init_module);
+module_exit(eepro100_cleanup_module);
+
+/*
+ * Local variables:
+ *  compile-command: "gcc -DMODULE -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -c eepro100.c `[ -f /usr/include/linux/modversions.h ] && echo -DMODVERSIONS`"
+ *  c-indent-level: 4
+ *  c-basic-offset: 4
+ *  tab-width: 4
+ * End:
+ */