hippi: Move the HIPPI driver

Move the HIPPI driver into drivers/net/hippi/ and make the
necessary Kconfig and Makefile changes.

CC: Jes Sorensen <jes@wildopensource.com>
CC: Jes Sorensen <jes@trained-monkey.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

4 files changed, 2606 insertions, 0 deletions

diff --git a/drivers/net/hippi/Kconfig b/drivers/net/hippi/Kconfig
new file mode 100644
index 000000000000..7393eb732ee6
--- /dev/null
+++ b/drivers/net/hippi/Kconfig
@@ -0,0 +1,39 @@
+#
+# HIPPI network device configuration
+#
+
+config HIPPI
+	bool "HIPPI driver support (EXPERIMENTAL)"
+	depends on EXPERIMENTAL && INET && PCI
+	---help---
+	  HIgh Performance Parallel Interface (HIPPI) is a 800Mbit/sec and
+	  1600Mbit/sec dual-simplex switched or point-to-point network. HIPPI
+	  can run over copper (25m) or fiber (300m on multi-mode or 10km on
+	  single-mode). HIPPI networks are commonly used for clusters and to
+	  connect to super computers. If you are connected to a HIPPI network
+	  and have a HIPPI network card in your computer that you want to use
+	  under Linux, say Y here (you must also remember to enable the driver
+	  for your HIPPI card below). Most people will say N here.
+
+if HIPPI
+
+config ROADRUNNER
+	tristate "Essential RoadRunner HIPPI PCI adapter support (EXPERIMENTAL)"
+	depends on PCI
+	---help---
+	  Say Y here if this is your PCI HIPPI network card.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called rrunner.  If unsure, say N.
+
+config ROADRUNNER_LARGE_RINGS
+	bool "Use large TX/RX rings (EXPERIMENTAL)"
+	depends on ROADRUNNER
+	---help---
+	  If you say Y here, the RoadRunner driver will preallocate up to 2 MB
+	  of additional memory to allow for fastest operation, both for
+	  transmitting and receiving. This memory cannot be used by any other
+	  kernel code or by user space programs. Say Y here only if you have
+	  the memory.
+
+endif /* HIPPI */
diff --git a/drivers/net/hippi/Makefile b/drivers/net/hippi/Makefile
new file mode 100644
index 000000000000..b95d629baee5
--- /dev/null
+++ b/drivers/net/hippi/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the HIPPI network device drivers.
+#
+
+obj-$(CONFIG_ROADRUNNER) += rrunner.o
diff --git a/drivers/net/hippi/rrunner.c b/drivers/net/hippi/rrunner.c
new file mode 100644
index 000000000000..e68c941926f1
--- /dev/null
+++ b/drivers/net/hippi/rrunner.c
@@ -0,0 +1,1716 @@
+/*
+ * 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/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 <linux/slab.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";
+
+
+static const struct net_device_ops rr_netdev_ops = {
+	.ndo_open 		= rr_open,
+	.ndo_stop		= rr_close,
+	.ndo_do_ioctl		= rr_ioctl,
+	.ndo_start_xmit		= rr_start_xmit,
+	.ndo_change_mtu		= hippi_change_mtu,
+	.ndo_set_mac_address	= hippi_mac_addr,
+};
+
+/*
+ * 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.
+ */
+
+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_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->netdev_ops = &rr_netdev_ops;
+
+	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;
+	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,
+			offsetof(struct eeprom, 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,
+			    size_t offset)
+{
+	__be32 word;
+
+	if ((rr_read_eeprom(rrpriv, offset,
+			    (unsigned 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 __devinit rr_init(struct net_device *dev)
+{
+	struct rr_private *rrpriv;
+	struct rr_regs __iomem *regs;
+	u32 sram_size, rev;
+
+	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
+	 */
+
+	*(__be16 *)(dev->dev_addr) =
+	  htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
+	*(__be32 *)(dev->dev_addr+2) =
+	  htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
+
+	printk("  MAC: %pM\n", dev->dev_addr);
+
+	sram_size = rr_read_eeprom_word(rrpriv, 8);
+	printk("  SRAM size 0x%06x\n", sram_size);
+
+	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);
+			dev->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);
+			dev->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);
+			dev->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){
+			dev->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);
+					dev->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);
+					dev->stats.rx_dropped++;
+					goto defer;
+				}
+			}
+			skb->protocol = hippi_type_trans(skb, dev);
+
+			netif_rx(skb);		/* send it up */
+
+			dev->stats.rx_packets++;
+			dev->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 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];
+
+				dev->stats.tx_packets++;
+				dev->stats.tx_bytes += skb->len;
+
+				pci_unmap_single(rrpriv->pci_dev,
+						 desc->addr.addrlo, skb->len,
+						 PCI_DMA_TODEVICE);
+				dev_kfree_skb_irq(skb);