Linux-2.6.12-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, 1756 insertions, 0 deletions

diff --git a/drivers/net/rrunner.c b/drivers/net/rrunner.c
new file mode 100644
index 000000000000..12a86f96d973
--- /dev/null
+++ b/drivers/net/rrunner.c
@@ -0,0 +1,1756 @@
+/*
+ * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
+ *
+ * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
+ *
+ * Thanks to Essential Communication for providing us with hardware
+ * and very comprehensive documentation without which I would not have
+ * been able to write this driver. A special thank you to John Gibbon
+ * for sorting out the legal issues, with the NDA, allowing the code to
+ * be released under the GPL.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
+ * stupid bugs in my code.
+ *
+ * Softnet support and various other patches from Val Henson of
+ * ODS/Essential.
+ *
+ * PCI DMA mapping code partly based on work by Francois Romieu.
+ */
+
+
+#define DEBUG 1
+#define RX_DMA_SKBUFF 1
+#define PKT_COPY_THRESHOLD 512
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/hippidevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <net/sock.h>
+
+#include <asm/system.h>
+#include <asm/cache.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#define rr_if_busy(dev)     netif_queue_stopped(dev)
+#define rr_if_running(dev)  netif_running(dev)
+
+#include "rrunner.h"
+
+#define RUN_AT(x) (jiffies + (x))
+
+
+MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
+MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
+MODULE_LICENSE("GPL");
+
+static char version[] __devinitdata = "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
+
+/*
+ * Implementation notes:
+ *
+ * The DMA engine only allows for DMA within physical 64KB chunks of
+ * memory. The current approach of the driver (and stack) is to use
+ * linear blocks of memory for the skbuffs. However, as the data block
+ * is always the first part of the skb and skbs are 2^n aligned so we
+ * are guarantted to get the whole block within one 64KB align 64KB
+ * chunk.
+ *
+ * On the long term, relying on being able to allocate 64KB linear
+ * chunks of memory is not feasible and the skb handling code and the
+ * stack will need to know about I/O vectors or something similar.
+ */
+
+/*
+ * These are checked at init time to see if they are at least 256KB
+ * and increased to 256KB if they are not. This is done to avoid ending
+ * up with socket buffers smaller than the MTU size,
+ */
+extern __u32 sysctl_wmem_max;
+extern __u32 sysctl_rmem_max;
+
+static int __devinit rr_init_one(struct pci_dev *pdev,
+	const struct pci_device_id *ent)
+{
+	struct net_device *dev;
+	static int version_disp;
+	u8 pci_latency;
+	struct rr_private *rrpriv;
+	void *tmpptr;
+	dma_addr_t ring_dma;
+	int ret = -ENOMEM;
+
+	dev = alloc_hippi_dev(sizeof(struct rr_private));
+	if (!dev)
+		goto out3;
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		ret = -ENODEV;
+		goto out2;
+	}
+
+	rrpriv = netdev_priv(dev);
+
+	SET_MODULE_OWNER(dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	if (pci_request_regions(pdev, "rrunner")) {
+		ret = -EIO;
+		goto out;
+	}
+
+	pci_set_drvdata(pdev, dev);
+
+	rrpriv->pci_dev = pdev;
+
+	spin_lock_init(&rrpriv->lock);
+
+	dev->irq = pdev->irq;
+	dev->open = &rr_open;
+	dev->hard_start_xmit = &rr_start_xmit;
+	dev->stop = &rr_close;
+	dev->get_stats = &rr_get_stats;
+	dev->do_ioctl = &rr_ioctl;
+
+	dev->base_addr = pci_resource_start(pdev, 0);
+
+	/* display version info if adapter is found */
+	if (!version_disp) {
+		/* set display flag to TRUE so that */
+		/* we only display this string ONCE */
+		version_disp = 1;
+		printk(version);
+	}
+
+	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
+	if (pci_latency <= 0x58){
+		pci_latency = 0x58;
+		pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
+	}
+
+	pci_set_master(pdev);
+
+	printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
+	       "at 0x%08lx, irq %i, PCI latency %i\n", dev->name,
+	       dev->base_addr, dev->irq, pci_latency);
+
+	/*
+	 * Remap the regs into kernel space.
+	 */
+
+	rrpriv->regs = ioremap(dev->base_addr, 0x1000);
+
+	if (!rrpriv->regs){
+		printk(KERN_ERR "%s:  Unable to map I/O register, "
+			"RoadRunner will be disabled.\n", dev->name);
+		ret = -EIO;
+		goto out;
+	}
+
+	tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
+	rrpriv->tx_ring = tmpptr;
+	rrpriv->tx_ring_dma = ring_dma;
+
+	if (!tmpptr) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
+	rrpriv->rx_ring = tmpptr;
+	rrpriv->rx_ring_dma = ring_dma;
+
+	if (!tmpptr) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
+	rrpriv->evt_ring = tmpptr;
+	rrpriv->evt_ring_dma = ring_dma;
+
+	if (!tmpptr) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/*
+	 * Don't access any register before this point!
+	 */
+#ifdef __BIG_ENDIAN
+	writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
+		&rrpriv->regs->HostCtrl);
+#endif
+	/*
+	 * Need to add a case for little-endian 64-bit hosts here.
+	 */
+
+	rr_init(dev);
+
+	dev->base_addr = 0;
+
+	ret = register_netdev(dev);
+	if (ret)
+		goto out;
+	return 0;
+
+ out:
+	if (rrpriv->rx_ring)
+		pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring, 
+				    rrpriv->rx_ring_dma);
+	if (rrpriv->tx_ring)
+		pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
+				    rrpriv->tx_ring_dma);
+	if (rrpriv->regs)
+		iounmap(rrpriv->regs);	
+	if (pdev) {
+		pci_release_regions(pdev);
+		pci_set_drvdata(pdev, NULL);
+	}
+ out2:
+	free_netdev(dev);
+ out3:
+	return ret;
+}
+
+static void __devexit rr_remove_one (struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+
+	if (dev) {
+		struct rr_private *rr = netdev_priv(dev);
+
+		if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)){
+			printk(KERN_ERR "%s: trying to unload running NIC\n",
+			       dev->name);
+			writel(HALT_NIC, &rr->regs->HostCtrl);
+		}
+
+		pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
+				    rr->evt_ring_dma);
+		pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
+				    rr->rx_ring_dma);
+		pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
+				    rr->tx_ring_dma);
+		unregister_netdev(dev);
+		iounmap(rr->regs);
+		free_netdev(dev);
+		pci_release_regions(pdev);
+		pci_disable_device(pdev);
+		pci_set_drvdata(pdev, NULL);
+	}
+}
+
+
+/*
+ * Commands are considered to be slow, thus there is no reason to
+ * inline this.
+ */
+static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
+{
+	struct rr_regs __iomem *regs;
+	u32 idx;
+
+	regs = rrpriv->regs;
+	/*
+	 * This is temporary - it will go away in the final version.
+	 * We probably also want to make this function inline.
+	 */
+	if (readl(&regs->HostCtrl) & NIC_HALTED){
+		printk("issuing command for halted NIC, code 0x%x, "
+		       "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
+		if (readl(&regs->Mode) & FATAL_ERR)
+			printk("error codes Fail1 %02x, Fail2 %02x\n",
+			       readl(&regs->Fail1), readl(&regs->Fail2));
+	}
+
+	idx = rrpriv->info->cmd_ctrl.pi;
+
+	writel(*(u32*)(cmd), &regs->CmdRing[idx]);
+	wmb();
+
+	idx = (idx - 1) % CMD_RING_ENTRIES;
+	rrpriv->info->cmd_ctrl.pi = idx;
+	wmb();
+
+	if (readl(&regs->Mode) & FATAL_ERR)
+		printk("error code %02x\n", readl(&regs->Fail1));
+}
+
+
+/*
+ * Reset the board in a sensible manner. The NIC is already halted
+ * when we get here and a spin-lock is held.
+ */
+static int rr_reset(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	struct eeprom *hw = NULL;
+	u32 start_pc;
+	int i;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	rr_load_firmware(dev);
+
+	writel(0x01000000, &regs->TX_state);
+	writel(0xff800000, &regs->RX_state);
+	writel(0, &regs->AssistState);
+	writel(CLEAR_INTA, &regs->LocalCtrl);
+	writel(0x01, &regs->BrkPt);
+	writel(0, &regs->Timer);
+	writel(0, &regs->TimerRef);
+	writel(RESET_DMA, &regs->DmaReadState);
+	writel(RESET_DMA, &regs->DmaWriteState);
+	writel(0, &regs->DmaWriteHostHi);
+	writel(0, &regs->DmaWriteHostLo);
+	writel(0, &regs->DmaReadHostHi);
+	writel(0, &regs->DmaReadHostLo);
+	writel(0, &regs->DmaReadLen);
+	writel(0, &regs->DmaWriteLen);
+	writel(0, &regs->DmaWriteLcl);
+	writel(0, &regs->DmaWriteIPchecksum);
+	writel(0, &regs->DmaReadLcl);
+	writel(0, &regs->DmaReadIPchecksum);
+	writel(0, &regs->PciState);
+#if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
+	writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
+#elif (BITS_PER_LONG == 64)
+	writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
+#else
+	writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
+#endif
+
+#if 0
+	/*
+	 * Don't worry, this is just black magic.
+	 */
+	writel(0xdf000, &regs->RxBase);
+	writel(0xdf000, &regs->RxPrd);
+	writel(0xdf000, &regs->RxCon);
+	writel(0xce000, &regs->TxBase);
+	writel(0xce000, &regs->TxPrd);
+	writel(0xce000, &regs->TxCon);
+	writel(0, &regs->RxIndPro);
+	writel(0, &regs->RxIndCon);
+	writel(0, &regs->RxIndRef);
+	writel(0, &regs->TxIndPro);
+	writel(0, &regs->TxIndCon);
+	writel(0, &regs->TxIndRef);
+	writel(0xcc000, &regs->pad10[0]);
+	writel(0, &regs->DrCmndPro);
+	writel(0, &regs->DrCmndCon);
+	writel(0, &regs->DwCmndPro);
+	writel(0, &regs->DwCmndCon);
+	writel(0, &regs->DwCmndRef);
+	writel(0, &regs->DrDataPro);
+	writel(0, &regs->DrDataCon);
+	writel(0, &regs->DrDataRef);
+	writel(0, &regs->DwDataPro);
+	writel(0, &regs->DwDataCon);
+	writel(0, &regs->DwDataRef);
+#endif
+
+	writel(0xffffffff, &regs->MbEvent);
+	writel(0, &regs->Event);
+
+	writel(0, &regs->TxPi);
+	writel(0, &regs->IpRxPi);
+
+	writel(0, &regs->EvtCon);
+	writel(0, &regs->EvtPrd);
+
+	rrpriv->info->evt_ctrl.pi = 0;
+
+	for (i = 0; i < CMD_RING_ENTRIES; i++)
+		writel(0, &regs->CmdRing[i]);
+
+/*
+ * Why 32 ? is this not cache line size dependent?
+ */
+	writel(RBURST_64|WBURST_64, &regs->PciState);
+	wmb();
+
+	start_pc = rr_read_eeprom_word(rrpriv, &hw->rncd_info.FwStart);
+
+#if (DEBUG > 1)
+	printk("%s: Executing firmware at address 0x%06x\n",
+	       dev->name, start_pc);
+#endif
+
+	writel(start_pc + 0x800, &regs->Pc);
+	wmb();
+	udelay(5);
+
+	writel(start_pc, &regs->Pc);
+	wmb();
+
+	return 0;
+}
+
+
+/*
+ * Read a string from the EEPROM.
+ */
+static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
+				unsigned long offset,
+				unsigned char *buf,
+				unsigned long length)
+{
+	struct rr_regs __iomem *regs = rrpriv->regs;
+	u32 misc, io, host, i;
+
+	io = readl(&regs->ExtIo);
+	writel(0, &regs->ExtIo);
+	misc = readl(&regs->LocalCtrl);
+	writel(0, &regs->LocalCtrl);
+	host = readl(&regs->HostCtrl);
+	writel(host | HALT_NIC, &regs->HostCtrl);
+	mb();
+
+	for (i = 0; i < length; i++){
+		writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
+		mb();
+		buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
+		mb();
+	}
+
+	writel(host, &regs->HostCtrl);
+	writel(misc, &regs->LocalCtrl);
+	writel(io, &regs->ExtIo);
+	mb();
+	return i;
+}
+
+
+/*
+ * Shortcut to read one word (4 bytes) out of the EEPROM and convert
+ * it to our CPU byte-order.
+ */
+static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
+			    void * offset)
+{
+	u32 word;
+
+	if ((rr_read_eeprom(rrpriv, (unsigned long)offset,
+			    (char *)&word, 4) == 4))
+		return be32_to_cpu(word);
+	return 0;
+}
+
+
+/*
+ * Write a string to the EEPROM.
+ *
+ * This is only called when the firmware is not running.
+ */
+static unsigned int write_eeprom(struct rr_private *rrpriv,
+				 unsigned long offset,
+				 unsigned char *buf,
+				 unsigned long length)
+{
+	struct rr_regs __iomem *regs = rrpriv->regs;
+	u32 misc, io, data, i, j, ready, error = 0;
+
+	io = readl(&regs->ExtIo);
+	writel(0, &regs->ExtIo);
+	misc = readl(&regs->LocalCtrl);
+	writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
+	mb();
+
+	for (i = 0; i < length; i++){
+		writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
+		mb();
+		data = buf[i] << 24;
+		/*
+		 * Only try to write the data if it is not the same
+		 * value already.
+		 */
+		if ((readl(&regs->WinData) & 0xff000000) != data){
+			writel(data, &regs->WinData);
+			ready = 0;
+			j = 0;
+			mb();
+			while(!ready){
+				udelay(20);
+				if ((readl(&regs->WinData) & 0xff000000) ==
+				    data)
+					ready = 1;
+				mb();
+				if (j++ > 5000){
+					printk("data mismatch: %08x, "
+					       "WinData %08x\n", data,
+					       readl(&regs->WinData));
+					ready = 1;
+					error = 1;
+				}
+			}
+		}
+	}
+
+	writel(misc, &regs->LocalCtrl);
+	writel(io, &regs->ExtIo);
+	mb();
+
+	return error;
+}
+
+
+static int __init rr_init(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	struct eeprom *hw = NULL;
+	u32 sram_size, rev;
+	int i;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	rev = readl(&regs->FwRev);
+	rrpriv->fw_rev = rev;
+	if (rev > 0x00020024)
+		printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
+		       ((rev >> 8) & 0xff), (rev & 0xff));
+	else if (rev >= 0x00020000) {
+		printk("  Firmware revision: %i.%i.%i (2.0.37 or "
+		       "later is recommended)\n", (rev >> 16),
+		       ((rev >> 8) & 0xff), (rev & 0xff));
+	}else{
+		printk("  Firmware revision too old: %i.%i.%i, please "
+		       "upgrade to 2.0.37 or later.\n",
+		       (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
+	}
+
+#if (DEBUG > 2)
+	printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
+#endif
+
+	/*
+	 * Read the hardware address from the eeprom.  The HW address
+	 * is not really necessary for HIPPI but awfully convenient.
+	 * The pointer arithmetic to put it in dev_addr is ugly, but
+	 * Donald Becker does it this way for the GigE version of this
+	 * card and it's shorter and more portable than any
+	 * other method I've seen.  -VAL
+	 */
+
+	*(u16 *)(dev->dev_addr) =
+	  htons(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA));
+	*(u32 *)(dev->dev_addr+2) =
+	  htonl(rr_read_eeprom_word(rrpriv, &hw->manf.BoardULA[4]));
+	
+	printk("  MAC: ");
+
+	for (i = 0; i < 5; i++)
+		printk("%2.2x:", dev->dev_addr[i]);
+	printk("%2.2x\n", dev->dev_addr[i]);
+
+	sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
+	printk("  SRAM size 0x%06x\n", sram_size);
+
+	if (sysctl_rmem_max < 262144){
+		printk("  Receive socket buffer limit too low (%i), "
+		       "setting to 262144\n", sysctl_rmem_max);
+		sysctl_rmem_max = 262144;
+	}
+
+	if (sysctl_wmem_max < 262144){
+		printk("  Transmit socket buffer limit too low (%i), "
+		       "setting to 262144\n", sysctl_wmem_max);
+		sysctl_wmem_max = 262144;
+	}
+
+	return 0;
+}
+
+
+static int rr_init1(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	unsigned long myjif, flags;
+	struct cmd cmd;
+	u32 hostctrl;
+	int ecode = 0;
+	short i;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	spin_lock_irqsave(&rrpriv->lock, flags);
+
+	hostctrl = readl(&regs->HostCtrl);
+	writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
+	wmb();
+
+	if (hostctrl & PARITY_ERR){
+		printk("%s: Parity error halting NIC - this is serious!\n",
+		       dev->name);
+		spin_unlock_irqrestore(&rrpriv->lock, flags);
+		ecode = -EFAULT;
+		goto error;
+	}
+
+	set_rxaddr(regs, rrpriv->rx_ctrl_dma);
+	set_infoaddr(regs, rrpriv->info_dma);
+
+	rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
+	rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
+	rrpriv->info->evt_ctrl.mode = 0;
+	rrpriv->info->evt_ctrl.pi = 0;
+	set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
+
+	rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
+	rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
+	rrpriv->info->cmd_ctrl.mode = 0;
+	rrpriv->info->cmd_ctrl.pi = 15;
+
+	for (i = 0; i < CMD_RING_ENTRIES; i++) {
+		writel(0, &regs->CmdRing[i]);
+	}
+
+	for (i = 0; i < TX_RING_ENTRIES; i++) {
+		rrpriv->tx_ring[i].size = 0;
+		set_rraddr(&rrpriv->tx_ring[i].addr, 0);
+		rrpriv->tx_skbuff[i] = NULL;
+	}
+	rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
+	rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
+	rrpriv->info->tx_ctrl.mode = 0;
+	rrpriv->info->tx_ctrl.pi = 0;
+	set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
+
+	/*
+	 * Set dirty_tx before we start receiving interrupts, otherwise
+	 * the interrupt handler might think it is supposed to process
+	 * tx ints before we are up and running, which may cause a null
+	 * pointer access in the int handler.
+	 */
+	rrpriv->tx_full = 0;
+	rrpriv->cur_rx = 0;
+	rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
+
+	rr_reset(dev);
+
+	/* Tuning values */
+	writel(0x5000, &regs->ConRetry);
+	writel(0x100, &regs->ConRetryTmr);
+	writel(0x500000, &regs->ConTmout);
+ 	writel(0x60, &regs->IntrTmr);
+	writel(0x500000, &regs->TxDataMvTimeout);
+	writel(0x200000, &regs->RxDataMvTimeout);
+ 	writel(0x80, &regs->WriteDmaThresh);
+ 	writel(0x80, &regs->ReadDmaThresh);
+
+	rrpriv->fw_running = 0;
+	wmb();
+
+	hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
+	writel(hostctrl, &regs->HostCtrl);
+	wmb();
+
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+	for (i = 0; i < RX_RING_ENTRIES; i++) {
+		struct sk_buff *skb;
+		dma_addr_t addr;
+
+		rrpriv->rx_ring[i].mode = 0;
+		skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
+		if (!skb) {
+			printk(KERN_WARNING "%s: Unable to allocate memory "
+			       "for receive ring - halting NIC\n", dev->name);
+			ecode = -ENOMEM;
+			goto error;
+		}
+		rrpriv->rx_skbuff[i] = skb;
+	        addr = pci_map_single(rrpriv->pci_dev, skb->data,
+			dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+		/*
+		 * Sanity test to see if we conflict with the DMA
+		 * limitations of the Roadrunner.
+		 */
+		if ((((unsigned long)skb->data) & 0xfff) > ~65320)
+			printk("skb alloc error\n");
+
+		set_rraddr(&rrpriv->rx_ring[i].addr, addr);
+		rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
+	}
+
+	rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
+	rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
+	rrpriv->rx_ctrl[4].mode = 8;
+	rrpriv->rx_ctrl[4].pi = 0;
+	wmb();
+	set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
+
+	udelay(1000);
+
+	/*
+	 * Now start the FirmWare.
+	 */
+	cmd.code = C_START_FW;
+	cmd.ring = 0;
+	cmd.index = 0;
+
+	rr_issue_cmd(rrpriv, &cmd);
+
+	/*
+	 * Give the FirmWare time to chew on the `get running' command.
+	 */
+	myjif = jiffies + 5 * HZ;
+	while (time_before(jiffies, myjif) && !rrpriv->fw_running)
+		cpu_relax();
+
+	netif_start_queue(dev);
+
+	return ecode;
+
+ error:
+	/*
+	 * We might have gotten here because we are out of memory,
+	 * make sure we release everything we allocated before failing
+	 */
+	for (i = 0; i < RX_RING_ENTRIES; i++) {
+		struct sk_buff *skb = rrpriv->rx_skbuff[i];
+
+		if (skb) {
+	        	pci_unmap_single(rrpriv->pci_dev, 
+					 rrpriv->rx_ring[i].addr.addrlo, 
+					 dev->mtu + HIPPI_HLEN,
+					 PCI_DMA_FROMDEVICE);
+			rrpriv->rx_ring[i].size = 0;
+			set_rraddr(&rrpriv->rx_ring[i].addr, 0);
+			dev_kfree_skb(skb);
+			rrpriv->rx_skbuff[i] = NULL;
+		}
+	}
+	return ecode;
+}
+
+
+/*
+ * All events are considered to be slow (RX/TX ints do not generate
+ * events) and are handled here, outside the main interrupt handler,
+ * to reduce the size of the handler.
+ */
+static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	u32 tmp;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	while (prodidx != eidx){
+		switch (rrpriv->evt_ring[eidx].code){
+		case E_NIC_UP:
+			tmp = readl(&regs->FwRev);
+			printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
+			       "up and running\n", dev->name,
+			       (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
+			rrpriv->fw_running = 1;
+			writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
+			wmb();
+			break;
+		case E_LINK_ON:
+			printk(KERN_INFO "%s: Optical link ON\n", dev->name);
+			break;
+		case E_LINK_OFF:
+			printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
+			break;
+		case E_RX_IDLE:
+			printk(KERN_WARNING "%s: RX data not moving\n",
+			       dev->name);
+			goto drop;
+		case E_WATCHDOG:
+			printk(KERN_INFO "%s: The watchdog is here to see "
+			       "us\n", dev->name);
+			break;
+		case E_INTERN_ERR:
+			printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_HOST_ERR:
+			printk(KERN_ERR "%s: Host software error\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		/*
+		 * TX events.
+		 */
+		case E_CON_REJ:
+			printk(KERN_WARNING "%s: Connection rejected\n",
+			       dev->name);
+			rrpriv->stats.tx_aborted_errors++;
+			break;
+		case E_CON_TMOUT:
+			printk(KERN_WARNING "%s: Connection timeout\n",
+			       dev->name);
+			break;
+		case E_DISC_ERR:
+			printk(KERN_WARNING "%s: HIPPI disconnect error\n",
+			       dev->name);
+			rrpriv->stats.tx_aborted_errors++;
+			break;
+		case E_INT_PRTY:
+			printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_TX_IDLE:
+			printk(KERN_WARNING "%s: Transmitter idle\n",
+			       dev->name);
+			break;
+		case E_TX_LINK_DROP:
+			printk(KERN_WARNING "%s: Link lost during transmit\n",
+			       dev->name);
+			rrpriv->stats.tx_aborted_errors++;
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_TX_INV_RNG:
+			printk(KERN_ERR "%s: Invalid send ring block\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_TX_INV_BUF:
+			printk(KERN_ERR "%s: Invalid send buffer address\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_TX_INV_DSC:
+			printk(KERN_ERR "%s: Invalid descriptor address\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		/*
+		 * RX events.
+		 */
+		case E_RX_RNG_OUT:
+			printk(KERN_INFO "%s: Receive ring full\n", dev->name);
+			break;
+
+		case E_RX_PAR_ERR:
+			printk(KERN_WARNING "%s: Receive parity error\n",
+			       dev->name);
+			goto drop;
+		case E_RX_LLRC_ERR:
+			printk(KERN_WARNING "%s: Receive LLRC error\n",
+			       dev->name);
+			goto drop;
+		case E_PKT_LN_ERR:
+			printk(KERN_WARNING "%s: Receive packet length "
+			       "error\n", dev->name);
+			goto drop;
+		case E_DTA_CKSM_ERR:
+			printk(KERN_WARNING "%s: Data checksum error\n",
+			       dev->name);
+			goto drop;
+		case E_SHT_BST:
+			printk(KERN_WARNING "%s: Unexpected short burst "
+			       "error\n", dev->name);
+			goto drop;
+		case E_STATE_ERR:
+			printk(KERN_WARNING "%s: Recv. state transition"
+			       " error\n", dev->name);
+			goto drop;
+		case E_UNEXP_DATA:
+			printk(KERN_WARNING "%s: Unexpected data error\n",
+			       dev->name);
+			goto drop;
+		case E_LST_LNK_ERR:
+			printk(KERN_WARNING "%s: Link lost error\n",
+			       dev->name);
+			goto drop;
+		case E_FRM_ERR:
+			printk(KERN_WARNING "%s: Framming Error\n",
+			       dev->name);
+			goto drop;
+		case E_FLG_SYN_ERR:
+			printk(KERN_WARNING "%s: Flag sync. lost during"
+			       "packet\n", dev->name);
+			goto drop;
+		case E_RX_INV_BUF:
+			printk(KERN_ERR "%s: Invalid receive buffer "
+			       "address\n", dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_RX_INV_DSC:
+			printk(KERN_ERR "%s: Invalid receive descriptor "
+			       "address\n", dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		case E_RNG_BLK:
+			printk(KERN_ERR "%s: Invalid ring block\n",
+			       dev->name);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			wmb();
+			break;
+		drop:
+			/* Label packet to be dropped.
+			 * Actual dropping occurs in rx
+			 * handling.
+			 *
+			 * The index of packet we get to drop is
+			 * the index of the packet following
+			 * the bad packet. -kbf
+			 */
+			{
+				u16 index = rrpriv->evt_ring[eidx].index;
+				index = (index + (RX_RING_ENTRIES - 1)) %
+					RX_RING_ENTRIES;
+				rrpriv->rx_ring[index].mode |=
+					(PACKET_BAD | PACKET_END);
+			}
+			break;
+		default:
+			printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
+			       dev->name, rrpriv->evt_ring[eidx].code);
+		}
+		eidx = (eidx + 1) % EVT_RING_ENTRIES;
+	}
+
+	rrpriv->info->evt_ctrl.pi = eidx;
+	wmb();
+	return eidx;
+}
+
+
+static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
+{
+	struct rr_private *rrpriv = netdev_priv(dev);
+	struct rr_regs __iomem *regs = rrpriv->regs;
+
+	do {
+		struct rx_desc *desc;
+		u32 pkt_len;
+
+		desc = &(rrpriv->rx_ring[index]);
+		pkt_len = desc->size;
+#if (DEBUG > 2)
+		printk("index %i, rxlimit %i\n", index, rxlimit);
+		printk("len %x, mode %x\n", pkt_len, desc->mode);
+#endif
+		if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
+			rrpriv->stats.rx_dropped++;
+			goto defer;
+		}
+
+		if (pkt_len > 0){
+			struct sk_buff *skb, *rx_skb;
+
+			rx_skb = rrpriv->rx_skbuff[index];
+
+			if (pkt_len < PKT_COPY_THRESHOLD) {
+				skb = alloc_skb(pkt_len, GFP_ATOMIC);
+				if (skb == NULL){
+					printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
+					rrpriv->stats.rx_dropped++;
+					goto defer;
+				} else {
+					pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
+								    desc->addr.addrlo,
+								    pkt_len,
+								    PCI_DMA_FROMDEVICE);
+
+					memcpy(skb_put(skb, pkt_len),
+					       rx_skb->data, pkt_len);
+
+					pci_dma_sync_single_for_device(rrpriv->pci_dev,
+								       desc->addr.addrlo,
+								       pkt_len,
+								       PCI_DMA_FROMDEVICE);
+				}
+			}else{
+				struct sk_buff *newskb;
+
+				newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
+					GFP_ATOMIC);
+				if (newskb){
+					dma_addr_t addr;
+
+	        			pci_unmap_single(rrpriv->pci_dev, 
+						desc->addr.addrlo, dev->mtu + 
+						HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+					skb = rx_skb;
+					skb_put(skb, pkt_len);
+					rrpriv->rx_skbuff[index] = newskb;
+	        			addr = pci_map_single(rrpriv->pci_dev, 
+						newskb->data, 
+						dev->mtu + HIPPI_HLEN, 
+						PCI_DMA_FROMDEVICE);
+					set_rraddr(&desc->addr, addr);
+				} else {
+					printk("%s: Out of memory, deferring "
+					       "packet\n", dev->name);
+					rrpriv->stats.rx_dropped++;
+					goto defer;
+				}
+			}
+			skb->dev = dev;
+			skb->protocol = hippi_type_trans(skb, dev);
+
+			netif_rx(skb);		/* send it up */
+
+			dev->last_rx = jiffies;
+			rrpriv->stats.rx_packets++;
+			rrpriv->stats.rx_bytes += pkt_len;
+		}
+	defer:
+		desc->mode = 0;
+		desc->size = dev->mtu + HIPPI_HLEN;
+
+		if ((index & 7) == 7)
+			writel(index, &regs->IpRxPi);
+
+		index = (index + 1) % RX_RING_ENTRIES;
+	} while(index != rxlimit);
+
+	rrpriv->cur_rx = index;
+	wmb();
+}
+
+
+static irqreturn_t rr_interrupt(int irq, void *dev_id, struct pt_regs *ptregs)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	struct net_device *dev = (struct net_device *)dev_id;
+	u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	if (!(readl(&regs->HostCtrl) & RR_INT))
+		return IRQ_NONE;
+
+	spin_lock(&rrpriv->lock);
+
+	prodidx = readl(&regs->EvtPrd);
+	txcsmr = (prodidx >> 8) & 0xff;
+	rxlimit = (prodidx >> 16) & 0xff;
+	prodidx &= 0xff;
+
+#if (DEBUG > 2)
+	printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
+	       prodidx, rrpriv->info->evt_ctrl.pi);
+#endif
+	/*
+	 * Order here is important.  We must handle events
+	 * before doing anything else in order to catch
+	 * such things as LLRC errors, etc -kbf
+	 */
+
+	eidx = rrpriv->info->evt_ctrl.pi;
+	if (prodidx != eidx)
+		eidx = rr_handle_event(dev, prodidx, eidx);
+
+	rxindex = rrpriv->cur_rx;
+	if (rxindex != rxlimit)
+		rx_int(dev, rxlimit, rxindex);
+
+	txcon = rrpriv->dirty_tx;
+	if (txcsmr != txcon) {
+		do {
+			/* Due to occational firmware TX producer/consumer out
+			 * of sync. error need to check entry in ring -kbf
+			 */
+			if(rrpriv->tx_skbuff[txcon]){
+				struct tx_desc *desc;
+				struct sk_buff *skb;
+
+				desc = &(rrpriv->tx_ring[txcon]);
+				skb = rrpriv->tx_skbuff[txcon];
+
+				rrpriv->stats.tx_packets++;
+				rrpriv->stats.tx_bytes += skb->len;
+
+				pci_unmap_single(rrpriv->pci_dev,
+						 desc->addr.addrlo, skb->len,
+						 PCI_DMA_TODEVICE);
+				dev_kfree_skb_irq(skb);
+
+				rrpriv->tx_skbuff[txcon] = NULL;
+				desc->size = 0;
+				set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
+				desc->mode = 0;
+			}
+			txcon = (txcon + 1) % TX_RING_ENTRIES;
+		} while (txcsmr != txcon);
+		wmb();
+
+		rrpriv->dirty_tx = txcon;
+		if (rrpriv->tx_full && rr_if_busy(dev) &&
+		    (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
+		     != rrpriv->dirty_tx)){
+			rrpriv->tx_full = 0;
+			netif_wake_queue(dev);
+		}
+	}
+
+	eidx |= ((txcsmr << 8) | (rxlimit << 16));
+	writel(eidx, &regs->EvtCon);
+	wmb();
+
+	spin_unlock(&rrpriv->lock);
+	return IRQ_HANDLED;
+}
+
+static inline void rr_raz_tx(struct rr_private *rrpriv,
+			     struct net_device *dev)
+{
+	int i;
+
+	for (i = 0; i < TX_RING_ENTRIES; i++) {
+		struct sk_buff *skb = rrpriv->tx_skbuff[i];
+
+		if (skb) {
+			struct tx_desc *desc = &(rrpriv->tx_ring[i]);
+
+	        	pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
+				skb->len, PCI_DMA_TODEVICE);
+			desc->size = 0;
+			set_rraddr(&desc->addr, 0);
+			dev_kfree_skb(skb);
+			rrpriv->tx_skbuff[i] = NULL;
+		}
+	}
+}
+
+
+static inline void rr_raz_rx(struct rr_private *rrpriv,
+			     struct net_device *dev)
+{
+	int i;
+
+	for (i = 0; i < RX_RING_ENTRIES; i++) {
+		struct sk_buff *skb = rrpriv->rx_skbuff[i];
+
+		if (skb) {
+			struct rx_desc *desc = &(rrpriv->rx_ring[i]);
+
+	        	pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
+				dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+			desc->size = 0;
+			set_rraddr(&desc->addr, 0);
+			dev_kfree_skb(skb);
+			rrpriv->rx_skbuff[i] = NULL;
+		}
+	}
+}
+
+static void rr_timer(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct rr_private *rrpriv = netdev_priv(dev);
+	struct rr_regs __iomem *regs = rrpriv->regs;
+	unsigned long flags;
+
+	if (readl(&regs->HostCtrl) & NIC_HALTED){
+		printk("%s: Restarting nic\n", dev->name);
+		memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
+		memset(rrpriv->info, 0, sizeof(struct rr_info));
+		wmb();
+
+		rr_raz_tx(rrpriv, dev);
+		rr_raz_rx(rrpriv, dev);
+
+		if (rr_init1(dev)) {
+			spin_lock_irqsave(&rrpriv->lock, flags);
+			writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, 
+			       &regs->HostCtrl);
+			spin_unlock_irqrestore(&rrpriv->lock, flags);
+		}
+	}
+	rrpriv->timer.expires = RUN_AT(5*HZ);
+	add_timer(&rrpriv->timer);
+}
+
+
+static int rr_open(struct net_device *dev)
+{
+	struct rr_private *rrpriv = netdev_priv(dev);
+	struct pci_dev *pdev = rrpriv->pci_dev;
+	struct rr_regs __iomem *regs;
+	int ecode = 0;
+	unsigned long flags;
+	dma_addr_t dma_addr;
+
+	regs = rrpriv->regs;
+
+	if (rrpriv->fw_rev < 0x00020000) {
+		printk(KERN_WARNING "%s: trying to configure device with "
+		       "obsolete firmware\n", dev->name);
+		ecode = -EBUSY;
+		goto error;
+	}
+
+	rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
+					       256 * sizeof(struct ring_ctrl),
+					       &dma_addr);
+	if (!rrpriv->rx_ctrl) {
+		ecode = -ENOMEM;
+		goto error;
+	}
+	rrpriv->rx_ctrl_dma = dma_addr;
+	memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
+
+	rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
+					    &dma_addr);
+	if (!rrpriv->info) {
+		ecode = -ENOMEM;
+		goto error;
+	}
+	rrpriv->info_dma = dma_addr;
+	memset(rrpriv->info, 0, sizeof(struct rr_info));
+	wmb();
+
+	spin_lock_irqsave(&rrpriv->lock, flags);
+	writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
+	readl(&regs->HostCtrl);
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+	if (request_irq(dev->irq, rr_interrupt, SA_SHIRQ, dev->name, dev)) {
+		printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
+		       dev->name, dev->irq);
+		ecode = -EAGAIN;
+		goto error;
+	}
+
+	if ((ecode = rr_init1(dev)))
+		goto error;
+
+	/* Set the timer to switch to check for link beat and perhaps switch
+	   to an alternate media type. */
+	init_timer(&rrpriv->timer);
+	rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
+	rrpriv->timer.data = (unsigned long)dev;
+	rrpriv->timer.function = &rr_timer;               /* timer handler */
+	add_timer(&rrpriv->timer);
+
+	netif_start_queue(dev);
+
+	return ecode;
+
+ error:
+	spin_lock_irqsave(&rrpriv->lock, flags);
+	writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+	if (rrpriv->info) {
+		pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
+				    rrpriv->info_dma);
+		rrpriv->info = NULL;
+	}
+	if (rrpriv->rx_ctrl) {
+		pci_free_consistent(pdev, sizeof(struct ring_ctrl),
+				    rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+		rrpriv->rx_ctrl = NULL;
+	}
+
+	netif_stop_queue(dev);
+	
+	return ecode;
+}
+
+
+static void rr_dump(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	u32 index, cons;
+	short i;
+	int len;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	printk("%s: dumping NIC TX rings\n", dev->name);
+
+	printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
+	       readl(&regs->RxPrd), readl(&regs->TxPrd),
+	       readl(&regs->EvtPrd), readl(&regs->TxPi),
+	       rrpriv->info->tx_ctrl.pi);
+
+	printk("Error code 0x%x\n", readl(&regs->Fail1));
+
+	index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
+	cons = rrpriv->dirty_tx;
+	printk("TX ring index %i, TX consumer %i\n",
+	       index, cons);
+
+	if (rrpriv->tx_skbuff[index]){
+		len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
+		printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
+		for (i = 0; i < len; i++){
+			if (!(i & 7))
+				printk("\n");
+			printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
+		}
+		printk("\n");
+	}
+
+	if (rrpriv->tx_skbuff[cons]){
+		len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
+		printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
+		printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
+		       rrpriv->tx_ring[cons].mode,
+		       rrpriv->tx_ring[cons].size,
+		       (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
+		       (unsigned long)rrpriv->tx_skbuff[cons]->data,
+		       (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
+		for (i = 0; i < len; i++){
+			if (!(i & 7))
+				printk("\n");
+			printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
+		}
+		printk("\n");
+	}
+
+	printk("dumping TX ring info:\n");
+	for (i = 0; i < TX_RING_ENTRIES; i++)
+		printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
+		       rrpriv->tx_ring[i].mode,
+		       rrpriv->tx_ring[i].size,
+		       (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
+
+}
+
+
+static int rr_close(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	unsigned long flags;
+	u32 tmp;
+	short i;
+
+	netif_stop_queue(dev);
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	/*
+	 * Lock to make sure we are not cleaning up while another CPU
+	 * is handling interrupts.
+	 */
+	spin_lock_irqsave(&rrpriv->lock, flags);
+
+	tmp = readl(&regs->HostCtrl);
+	if (tmp & NIC_HALTED){
+		printk("%s: NIC already halted\n", dev->name);
+		rr_dump(dev);
+	}else{
+		tmp |= HALT_NIC | RR_CLEAR_INT;
+		writel(tmp, &regs->HostCtrl);
+		readl(&regs->HostCtrl);
+	}
+
+	rrpriv->fw_running = 0;
+
+	del_timer_sync(&rrpriv->timer);
+
+	writel(0, &regs->TxPi);
+	writel(0, &regs->IpRxPi);
+
+	writel(0, &regs->EvtCon);
+	writel(0, &regs->EvtPrd);
+
+	for (i = 0; i < CMD_RING_ENTRIES; i++)
+		writel(0, &regs->CmdRing[i]);
+
+	rrpriv->info->tx_ctrl.entries = 0;
+	rrpriv->info->cmd_ctrl.pi = 0;
+	rrpriv->info->evt_ctrl.pi = 0;
+	rrpriv->rx_ctrl[4].entries = 0;
+
+	rr_raz_tx(rrpriv, dev);
+	rr_raz_rx(rrpriv, dev);
+
+	pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
+			    rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+	rrpriv->rx_ctrl = NULL;
+
+	pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
+			    rrpriv->info, rrpriv->info_dma);
+	rrpriv->info = NULL;
+
+	free_irq(dev->irq, dev);
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+	return 0;
+}
+
+
+static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct rr_private *rrpriv = netdev_priv(dev);
+	struct rr_regs __iomem *regs = rrpriv->regs;
+	struct ring_ctrl *txctrl;
+	unsigned long flags;
+	u32 index, len = skb->len;
+	u32 *ifield;
+	struct sk_buff *new_skb;
+
+	if (readl(&regs->Mode) & FATAL_ERR)
+		printk("error codes Fail1 %02x, Fail2 %02x\n",
+		       readl(&regs->Fail1), readl(&regs->Fail2));
+
+	/*
+	 * We probably need to deal with tbusy here to prevent overruns.
+	 */
+
+	if (skb_headroom(skb) < 8){
+		printk("incoming skb too small - reallocating\n");
+		if (!(new_skb = dev_alloc_skb(len + 8))) {
+			dev_kfree_skb(skb);
+			netif_wake_queue(dev);
+			return -EBUSY;
+		}
+		skb_reserve(new_skb, 8);
+		skb_put(new_skb, len);
+		memcpy(new_skb->data, skb->data, len);
+		dev_kfree_skb(skb);
+		skb = new_skb;
+	}
+
+	ifield = (u32 *)skb_push(skb, 8);
+
+	ifield[0] = 0;
+	ifield[1] = skb->private.ifield;
+
+	/*
+	 * We don't need the lock before we are actually going to start
+	 * fiddling with the control blocks.
+	 */
+	spin_lock_irqsave(&rrpriv->lock, flags);
+
+	txctrl = &rrpriv->info->tx_ctrl;
+
+	index = txctrl->pi;
+
+	rrpriv->tx_skbuff[index] = skb;
+	set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
+		rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
+	rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
+	rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
+	txctrl->pi = (index + 1) % TX_RING_ENTRIES;
+	wmb();
+	writel(txctrl->pi, &regs->TxPi);
+
+	if (txctrl->pi == rrpriv->dirty_tx){
+		rrpriv->tx_full = 1;
+		netif_stop_queue(dev);
+	}
+
+	spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+	dev->trans_start = jiffies;
+	return 0;
+}
+
+
+static struct net_device_stats *rr_get_stats(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+
+	rrpriv = netdev_priv(dev);
+
+	return(&rrpriv->stats);
+}
+
+
+/*
+ * Read the firmware out of the EEPROM and put it into the SRAM
+ * (or from user space - later)
+ *
+ * This operation requires the NIC to be halted and is performed with
+ * interrupts disabled and with the spinlock hold.
+ */
+static int rr_load_firmware(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	unsigned long eptr, segptr;
+	int i, j;
+	u32 localctrl, sptr, len, tmp;
+	u32 p2len, p2size, nr_seg, revision, io, sram_size;
+	struct eeprom *hw = NULL;
+
+	rrpriv = netdev_priv(dev);
+	regs = rrpriv->regs;
+
+	if (dev->flags & IFF_UP)
+		return -EBUSY;
+
+	if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
+		printk("%s: Trying to load firmware to a running NIC.\n", 
+		       dev->name);
+		return -EBUSY;
+	}
+
+	localctrl = readl(&regs->LocalCtrl);
+	writel(0, &regs->LocalCtrl);
+
+	writel(0, &regs->EvtPrd);
+	writel(0, &regs->RxPrd);
+	writel(0, &regs->TxPrd);
+
+	/*
+	 * First wipe the entire SRAM, otherwise we might run into all
+	 * kinds of trouble ... sigh, this took almost all afternoon
+	 * to track down ;-(
+	 */
+	io = readl(&regs->ExtIo);
+	writel(0, &regs->ExtIo);
+	sram_size = rr_read_eeprom_word(rrpriv, (void *)8);
+
+	for (i = 200; i < sram_size / 4; i++){
+		writel(i * 4, &regs->WinBase);
+		mb();
+		writel(0, &regs->WinData);
+		mb();
+	}
+	writel(io, &regs->ExtIo);
+	mb();
+
+	eptr = (unsigned long)rr_read_eeprom_word(rrpriv,
+					       &hw->rncd_info.AddrRunCodeSegs);
+	eptr = ((eptr & 0x1fffff) >> 3);
+
+	p2len = rr_read_eeprom_word(rrpriv, (void *)(0x83*4));
+	p2len = (p2len << 2);
+	p2size = rr_read_eeprom_word(rrpriv, (void *)(0x84*4));
+	p2size = ((p2size & 0x1fffff) >> 3);
+
+	if ((eptr < p2size) || (eptr > (p2size + p2len))){
+		printk("%s: eptr is invalid\n", dev->name);
+		goto out;
+	}
+
+	revision = rr_read_eeprom_word(rrpriv, &hw->manf.HeaderFmt);
+
+	if (revision != 1){
+		printk("%s: invalid firmware format (%i)\n",
+		       dev->name, revision);
+		goto out;
+	}
+
+	nr_seg = rr_read_eeprom_word(rrpriv, (void *)eptr);
+	eptr +=4;
+#if (DEBUG > 1)
+	printk("%s: nr_seg %i\n", dev->name, nr_seg);
+#endif
+
+	for (i = 0; i < nr_seg; i++){
+		sptr = rr_read_eeprom_word(rrpriv, (void *)eptr);
+		eptr += 4;
+		len = rr_read_eeprom_word(rrpriv, (void *)eptr);
+		eptr += 4;
+		segptr = (unsigned long)rr_read_eeprom_word(rrpriv, (void *)eptr);
+		segptr = ((segptr & 0x1fffff) >> 3);
+		eptr += 4;
+#if (DEBUG > 1)
+		printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
+		       dev->name, i, sptr, len, segptr);
+#endif
+		for (j = 0; j < len; j++){
+			tmp = rr_read_eeprom_word(rrpriv, (void *)segptr);
+			writel(sptr, &regs->WinBase);
+			mb();
+			writel(tmp, &regs->WinData);
+			mb();
+			segptr += 4;
+			sptr += 4;
+		}
+	}
+
+out:
+	writel(localctrl, &regs->LocalCtrl);
+	mb();
+	return 0;
+}
+
+
+static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct rr_private *rrpriv;
+	unsigned char *image, *oldimage;
+	unsigned long flags;
+	unsigned int i;
+	int error = -EOPNOTSUPP;
+
+	rrpriv = netdev_priv(dev);
+
+	switch(cmd){
+	case SIOCRRGFW:
+		if (!capable(CAP_SYS_RAWIO)){
+			return -EPERM;
+		}
+
+		image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+		if (!image){
+			printk(KERN_ERR "%s: Unable to allocate memory "
+			       "for EEPROM image\n", dev->name);
+			return -ENOMEM;
+		}
+
+
+		if (rrpriv->fw_running){
+			printk("%s: Firmware already running\n", dev->name);
+			error = -EPERM;
+			goto gf_out;
+		}
+
+		spin_lock_irqsave(&rrpriv->lock, flags);
+		i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
+		spin_unlock_irqrestore(&rrpriv->lock, flags);
+		if (i != EEPROM_BYTES){
+			printk(KERN_ERR "%s: Error reading EEPROM\n",
+			       dev->name);
+			error = -EFAULT;
+			goto gf_out;
+		}
+		error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
+		if (error)
+			error = -EFAULT;
+	gf_out:
+		kfree(image);
+		return error;
+		
+	case SIOCRRPFW:
+		if (!capable(CAP_SYS_RAWIO)){
+			return -EPERM;
+		}
+
+		image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+		oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+		if (!image || !oldimage) {
+			printk(KERN_ERR "%s: Unable to allocate memory "
+			       "for EEPROM image\n", dev->name);
+			error = -ENOMEM;
+			goto wf_out;
+		}
+
+		error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
+		if (error) {
+			error = -EFAULT;
+			goto wf_out;
+		}
+
+		if (rrpriv->fw_running){
+			printk("%s: Firmware already running\n", dev->name);
+			error = -EPERM;
+			goto wf_out;
+		}
+
+		printk("%s: Updating EEPROM firmware\n", dev->name);
+
+		spin_lock_irqsave(&rrpriv->lock, flags);
+		error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
+		if (error)
+			printk(KERN_ERR "%s: Error writing EEPROM\n",
+			       dev->name);
+
+		i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
+		spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+		if (i != EEPROM_BYTES)
+			printk(KERN_ERR "%s: Error reading back EEPROM "
+			       "image\n", dev->name);
+
+		error = memcmp(image, oldimage, EEPROM_BYTES);
+		if (error){
+			printk(KERN_ERR "%s: Error verifying EEPROM image\n",
+			       dev->name);
+			error = -EFAULT;
+		}
+	wf_out:
+		if (oldimage)
+			kfree(oldimage);
+		if (image)
+			kfree(image);
+		return error;
+		
+	case SIOCRRID:
+		return put_user(0x52523032, (int __user *)rq->ifr_data);
+	default:
+		return error;
+	}
+}
+
+static struct pci_device_id rr_pci_tbl[] = {
+	{ PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
+		PCI_ANY_ID, PCI_ANY_ID, },
+	{ 0,}
+};
+MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
+
+static struct pci_driver rr_driver = {
+	.name		= "rrunner",
+	.id_table	= rr_pci_tbl,
+	.probe		= rr_init_one,
+	.remove		= __devexit_p(rr_remove_one),
+};
+
+static int __init rr_init_module(void)
+{
+	return pci_module_init(&rr_driver);
+}
+
+static void __exit rr_cleanup_module(void)
+{
+	pci_unregister_driver(&rr_driver);
+}
+
+module_init(rr_init_module);
+module_exit(rr_cleanup_module);
+
+/*
+ * Local variables:
+ * compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c rrunner.c"
+ * End:
+ */