Initial import

1 files changed, 2747 insertions, 0 deletions

diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
new file mode 100644
index 000000000..ddc4ceb85
--- /dev/null
+++ b/drivers/atm/nicstar.c
@@ -0,0 +1,2747 @@
+/*
+ * nicstar.c
+ *
+ * Device driver supporting CBR for IDT 77201/77211 "NICStAR" based cards.
+ *
+ * IMPORTANT: The included file nicstarmac.c was NOT WRITTEN BY ME.
+ *            It was taken from the frle-0.22 device driver.
+ *            As the file doesn't have a copyright notice, in the file
+ *            nicstarmac.copyright I put the copyright notice from the
+ *            frle-0.22 device driver.
+ *            Some code is based on the nicstar driver by M. Welsh.
+ *
+ * Author: Rui Prior (rprior@inescn.pt)
+ * PowerPC support by Jay Talbott (jay_talbott@mcg.mot.com) April 1999
+ *
+ *
+ * (C) INESC 1999
+ */
+
+/*
+ * IMPORTANT INFORMATION
+ *
+ * There are currently three types of spinlocks:
+ *
+ * 1 - Per card interrupt spinlock (to protect structures and such)
+ * 2 - Per SCQ scq spinlock
+ * 3 - Per card resource spinlock (to access registers, etc.)
+ *
+ * These must NEVER be grabbed in reverse order.
+ *
+ */
+
+/* Header files */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/atmdev.h>
+#include <linux/atm.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/idr.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/etherdevice.h>
+#include "nicstar.h"
+#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
+#include "suni.h"
+#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
+#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
+#include "idt77105.h"
+#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
+
+/* Additional code */
+
+#include "nicstarmac.c"
+
+/* Configurable parameters */
+
+#undef PHY_LOOPBACK
+#undef TX_DEBUG
+#undef RX_DEBUG
+#undef GENERAL_DEBUG
+#undef EXTRA_DEBUG
+
+/* Do not touch these */
+
+#ifdef TX_DEBUG
+#define TXPRINTK(args...) printk(args)
+#else
+#define TXPRINTK(args...)
+#endif /* TX_DEBUG */
+
+#ifdef RX_DEBUG
+#define RXPRINTK(args...) printk(args)
+#else
+#define RXPRINTK(args...)
+#endif /* RX_DEBUG */
+
+#ifdef GENERAL_DEBUG
+#define PRINTK(args...) printk(args)
+#else
+#define PRINTK(args...)
+#endif /* GENERAL_DEBUG */
+
+#ifdef EXTRA_DEBUG
+#define XPRINTK(args...) printk(args)
+#else
+#define XPRINTK(args...)
+#endif /* EXTRA_DEBUG */
+
+/* Macros */
+
+#define CMD_BUSY(card) (readl((card)->membase + STAT) & NS_STAT_CMDBZ)
+
+#define NS_DELAY mdelay(1)
+
+#define PTR_DIFF(a, b)	((u32)((unsigned long)(a) - (unsigned long)(b)))
+
+#ifndef ATM_SKB
+#define ATM_SKB(s) (&(s)->atm)
+#endif
+
+#define scq_virt_to_bus(scq, p) \
+		(scq->dma + ((unsigned long)(p) - (unsigned long)(scq)->org))
+
+/* Function declarations */
+
+static u32 ns_read_sram(ns_dev * card, u32 sram_address);
+static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
+			  int count);
+static int ns_init_card(int i, struct pci_dev *pcidev);
+static void ns_init_card_error(ns_dev * card, int error);
+static scq_info *get_scq(ns_dev *card, int size, u32 scd);
+static void free_scq(ns_dev *card, scq_info * scq, struct atm_vcc *vcc);
+static void push_rxbufs(ns_dev *, struct sk_buff *);
+static irqreturn_t ns_irq_handler(int irq, void *dev_id);
+static int ns_open(struct atm_vcc *vcc);
+static void ns_close(struct atm_vcc *vcc);
+static void fill_tst(ns_dev * card, int n, vc_map * vc);
+static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb);
+static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
+		     struct sk_buff *skb);
+static void process_tsq(ns_dev * card);
+static void drain_scq(ns_dev * card, scq_info * scq, int pos);
+static void process_rsq(ns_dev * card);
+static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe);
+static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb);
+static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count);
+static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb);
+static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb);
+static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb);
+static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page);
+static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
+#ifdef EXTRA_DEBUG
+static void which_list(ns_dev * card, struct sk_buff *skb);
+#endif
+static void ns_poll(unsigned long arg);
+static void ns_phy_put(struct atm_dev *dev, unsigned char value,
+		       unsigned long addr);
+static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr);
+
+/* Global variables */
+
+static struct ns_dev *cards[NS_MAX_CARDS];
+static unsigned num_cards;
+static struct atmdev_ops atm_ops = {
+	.open = ns_open,
+	.close = ns_close,
+	.ioctl = ns_ioctl,
+	.send = ns_send,
+	.phy_put = ns_phy_put,
+	.phy_get = ns_phy_get,
+	.proc_read = ns_proc_read,
+	.owner = THIS_MODULE,
+};
+
+static struct timer_list ns_timer;
+static char *mac[NS_MAX_CARDS];
+module_param_array(mac, charp, NULL, 0);
+MODULE_LICENSE("GPL");
+
+/* Functions */
+
+static int nicstar_init_one(struct pci_dev *pcidev,
+			    const struct pci_device_id *ent)
+{
+	static int index = -1;
+	unsigned int error;
+
+	index++;
+	cards[index] = NULL;
+
+	error = ns_init_card(index, pcidev);
+	if (error) {
+		cards[index--] = NULL;	/* don't increment index */
+		goto err_out;
+	}
+
+	return 0;
+err_out:
+	return -ENODEV;
+}
+
+static void nicstar_remove_one(struct pci_dev *pcidev)
+{
+	int i, j;
+	ns_dev *card = pci_get_drvdata(pcidev);
+	struct sk_buff *hb;
+	struct sk_buff *iovb;
+	struct sk_buff *lb;
+	struct sk_buff *sb;
+
+	i = card->index;
+
+	if (cards[i] == NULL)
+		return;
+
+	if (card->atmdev->phy && card->atmdev->phy->stop)
+		card->atmdev->phy->stop(card->atmdev);
+
+	/* Stop everything */
+	writel(0x00000000, card->membase + CFG);
+
+	/* De-register device */
+	atm_dev_deregister(card->atmdev);
+
+	/* Disable PCI device */
+	pci_disable_device(pcidev);
+
+	/* Free up resources */
+	j = 0;
+	PRINTK("nicstar%d: freeing %d huge buffers.\n", i, card->hbpool.count);
+	while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL) {
+		dev_kfree_skb_any(hb);
+		j++;
+	}
+	PRINTK("nicstar%d: %d huge buffers freed.\n", i, j);
+	j = 0;
+	PRINTK("nicstar%d: freeing %d iovec buffers.\n", i,
+	       card->iovpool.count);
+	while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL) {
+		dev_kfree_skb_any(iovb);
+		j++;
+	}
+	PRINTK("nicstar%d: %d iovec buffers freed.\n", i, j);
+	while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
+		dev_kfree_skb_any(lb);
+	while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
+		dev_kfree_skb_any(sb);
+	free_scq(card, card->scq0, NULL);
+	for (j = 0; j < NS_FRSCD_NUM; j++) {
+		if (card->scd2vc[j] != NULL)
+			free_scq(card, card->scd2vc[j]->scq, card->scd2vc[j]->tx_vcc);
+	}
+	idr_destroy(&card->idr);
+	dma_free_coherent(&card->pcidev->dev, NS_RSQSIZE + NS_RSQ_ALIGNMENT,
+			  card->rsq.org, card->rsq.dma);
+	dma_free_coherent(&card->pcidev->dev, NS_TSQSIZE + NS_TSQ_ALIGNMENT,
+			  card->tsq.org, card->tsq.dma);
+	free_irq(card->pcidev->irq, card);
+	iounmap(card->membase);
+	kfree(card);
+}
+
+static struct pci_device_id nicstar_pci_tbl[] = {
+	{ PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77201), 0 },
+	{0,}			/* terminate list */
+};
+
+MODULE_DEVICE_TABLE(pci, nicstar_pci_tbl);
+
+static struct pci_driver nicstar_driver = {
+	.name = "nicstar",
+	.id_table = nicstar_pci_tbl,
+	.probe = nicstar_init_one,
+	.remove = nicstar_remove_one,
+};
+
+static int __init nicstar_init(void)
+{
+	unsigned error = 0;	/* Initialized to remove compile warning */
+
+	XPRINTK("nicstar: nicstar_init() called.\n");
+
+	error = pci_register_driver(&nicstar_driver);
+
+	TXPRINTK("nicstar: TX debug enabled.\n");
+	RXPRINTK("nicstar: RX debug enabled.\n");
+	PRINTK("nicstar: General debug enabled.\n");
+#ifdef PHY_LOOPBACK
+	printk("nicstar: using PHY loopback.\n");
+#endif /* PHY_LOOPBACK */
+	XPRINTK("nicstar: nicstar_init() returned.\n");
+
+	if (!error) {
+		init_timer(&ns_timer);
+		ns_timer.expires = jiffies + NS_POLL_PERIOD;
+		ns_timer.data = 0UL;
+		ns_timer.function = ns_poll;
+		add_timer(&ns_timer);
+	}
+
+	return error;
+}
+
+static void __exit nicstar_cleanup(void)
+{
+	XPRINTK("nicstar: nicstar_cleanup() called.\n");
+
+	del_timer(&ns_timer);
+
+	pci_unregister_driver(&nicstar_driver);
+
+	XPRINTK("nicstar: nicstar_cleanup() returned.\n");
+}
+
+static u32 ns_read_sram(ns_dev * card, u32 sram_address)
+{
+	unsigned long flags;
+	u32 data;
+	sram_address <<= 2;
+	sram_address &= 0x0007FFFC;	/* address must be dword aligned */
+	sram_address |= 0x50000000;	/* SRAM read command */
+	spin_lock_irqsave(&card->res_lock, flags);
+	while (CMD_BUSY(card)) ;
+	writel(sram_address, card->membase + CMD);
+	while (CMD_BUSY(card)) ;
+	data = readl(card->membase + DR0);
+	spin_unlock_irqrestore(&card->res_lock, flags);
+	return data;
+}
+
+static void ns_write_sram(ns_dev * card, u32 sram_address, u32 * value,
+			  int count)
+{
+	unsigned long flags;
+	int i, c;
+	count--;		/* count range now is 0..3 instead of 1..4 */
+	c = count;
+	c <<= 2;		/* to use increments of 4 */
+	spin_lock_irqsave(&card->res_lock, flags);
+	while (CMD_BUSY(card)) ;
+	for (i = 0; i <= c; i += 4)
+		writel(*(value++), card->membase + i);
+	/* Note: DR# registers are the first 4 dwords in nicstar's memspace,
+	   so card->membase + DR0 == card->membase */
+	sram_address <<= 2;
+	sram_address &= 0x0007FFFC;
+	sram_address |= (0x40000000 | count);
+	writel(sram_address, card->membase + CMD);
+	spin_unlock_irqrestore(&card->res_lock, flags);
+}
+
+static int ns_init_card(int i, struct pci_dev *pcidev)
+{
+	int j;
+	struct ns_dev *card = NULL;
+	unsigned char pci_latency;
+	unsigned error;
+	u32 data;
+	u32 u32d[4];
+	u32 ns_cfg_rctsize;
+	int bcount;
+	unsigned long membase;
+
+	error = 0;
+
+	if (pci_enable_device(pcidev)) {
+		printk("nicstar%d: can't enable PCI device\n", i);
+		error = 2;
+		ns_init_card_error(card, error);
+		return error;
+	}
+        if (dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)) != 0) {
+                printk(KERN_WARNING
+		       "nicstar%d: No suitable DMA available.\n", i);
+		error = 2;
+		ns_init_card_error(card, error);
+		return error;
+        }
+
+	if ((card = kmalloc(sizeof(ns_dev), GFP_KERNEL)) == NULL) {
+		printk
+		    ("nicstar%d: can't allocate memory for device structure.\n",
+		     i);
+		error = 2;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	cards[i] = card;
+	spin_lock_init(&card->int_lock);
+	spin_lock_init(&card->res_lock);
+
+	pci_set_drvdata(pcidev, card);
+
+	card->index = i;
+	card->atmdev = NULL;
+	card->pcidev = pcidev;
+	membase = pci_resource_start(pcidev, 1);
+	card->membase = ioremap(membase, NS_IOREMAP_SIZE);
+	if (!card->membase) {
+		printk("nicstar%d: can't ioremap() membase.\n", i);
+		error = 3;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	PRINTK("nicstar%d: membase at 0x%p.\n", i, card->membase);
+
+	pci_set_master(pcidev);
+
+	if (pci_read_config_byte(pcidev, PCI_LATENCY_TIMER, &pci_latency) != 0) {
+		printk("nicstar%d: can't read PCI latency timer.\n", i);
+		error = 6;
+		ns_init_card_error(card, error);
+		return error;
+	}
+#ifdef NS_PCI_LATENCY
+	if (pci_latency < NS_PCI_LATENCY) {
+		PRINTK("nicstar%d: setting PCI latency timer to %d.\n", i,
+		       NS_PCI_LATENCY);
+		for (j = 1; j < 4; j++) {
+			if (pci_write_config_byte
+			    (pcidev, PCI_LATENCY_TIMER, NS_PCI_LATENCY) != 0)
+				break;
+		}
+		if (j == 4) {
+			printk
+			    ("nicstar%d: can't set PCI latency timer to %d.\n",
+			     i, NS_PCI_LATENCY);
+			error = 7;
+			ns_init_card_error(card, error);
+			return error;
+		}
+	}
+#endif /* NS_PCI_LATENCY */
+
+	/* Clear timer overflow */
+	data = readl(card->membase + STAT);
+	if (data & NS_STAT_TMROF)
+		writel(NS_STAT_TMROF, card->membase + STAT);
+
+	/* Software reset */
+	writel(NS_CFG_SWRST, card->membase + CFG);
+	NS_DELAY;
+	writel(0x00000000, card->membase + CFG);
+
+	/* PHY reset */
+	writel(0x00000008, card->membase + GP);
+	NS_DELAY;
+	writel(0x00000001, card->membase + GP);
+	NS_DELAY;
+	while (CMD_BUSY(card)) ;
+	writel(NS_CMD_WRITE_UTILITY | 0x00000100, card->membase + CMD);	/* Sync UTOPIA with SAR clock */
+	NS_DELAY;
+
+	/* Detect PHY type */
+	while (CMD_BUSY(card)) ;
+	writel(NS_CMD_READ_UTILITY | 0x00000200, card->membase + CMD);
+	while (CMD_BUSY(card)) ;
+	data = readl(card->membase + DR0);
+	switch (data) {
+	case 0x00000009:
+		printk("nicstar%d: PHY seems to be 25 Mbps.\n", i);
+		card->max_pcr = ATM_25_PCR;
+		while (CMD_BUSY(card)) ;
+		writel(0x00000008, card->membase + DR0);
+		writel(NS_CMD_WRITE_UTILITY | 0x00000200, card->membase + CMD);
+		/* Clear an eventual pending interrupt */
+		writel(NS_STAT_SFBQF, card->membase + STAT);
+#ifdef PHY_LOOPBACK
+		while (CMD_BUSY(card)) ;
+		writel(0x00000022, card->membase + DR0);
+		writel(NS_CMD_WRITE_UTILITY | 0x00000202, card->membase + CMD);
+#endif /* PHY_LOOPBACK */
+		break;
+	case 0x00000030:
+	case 0x00000031:
+		printk("nicstar%d: PHY seems to be 155 Mbps.\n", i);
+		card->max_pcr = ATM_OC3_PCR;
+#ifdef PHY_LOOPBACK
+		while (CMD_BUSY(card)) ;
+		writel(0x00000002, card->membase + DR0);
+		writel(NS_CMD_WRITE_UTILITY | 0x00000205, card->membase + CMD);
+#endif /* PHY_LOOPBACK */
+		break;
+	default:
+		printk("nicstar%d: unknown PHY type (0x%08X).\n", i, data);
+		error = 8;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	writel(0x00000000, card->membase + GP);
+
+	/* Determine SRAM size */
+	data = 0x76543210;
+	ns_write_sram(card, 0x1C003, &data, 1);
+	data = 0x89ABCDEF;
+	ns_write_sram(card, 0x14003, &data, 1);
+	if (ns_read_sram(card, 0x14003) == 0x89ABCDEF &&
+	    ns_read_sram(card, 0x1C003) == 0x76543210)
+		card->sram_size = 128;
+	else
+		card->sram_size = 32;
+	PRINTK("nicstar%d: %dK x 32bit SRAM size.\n", i, card->sram_size);
+
+	card->rct_size = NS_MAX_RCTSIZE;
+
+#if (NS_MAX_RCTSIZE == 4096)
+	if (card->sram_size == 128)
+		printk
+		    ("nicstar%d: limiting maximum VCI. See NS_MAX_RCTSIZE in nicstar.h\n",
+		     i);
+#elif (NS_MAX_RCTSIZE == 16384)
+	if (card->sram_size == 32) {
+		printk
+		    ("nicstar%d: wasting memory. See NS_MAX_RCTSIZE in nicstar.h\n",
+		     i);
+		card->rct_size = 4096;
+	}
+#else
+#error NS_MAX_RCTSIZE must be either 4096 or 16384 in nicstar.c
+#endif
+
+	card->vpibits = NS_VPIBITS;
+	if (card->rct_size == 4096)
+		card->vcibits = 12 - NS_VPIBITS;
+	else			/* card->rct_size == 16384 */
+		card->vcibits = 14 - NS_VPIBITS;
+
+	/* Initialize the nicstar eeprom/eprom stuff, for the MAC addr */
+	if (mac[i] == NULL)
+		nicstar_init_eprom(card->membase);
+
+	/* Set the VPI/VCI MSb mask to zero so we can receive OAM cells */
+	writel(0x00000000, card->membase + VPM);
+
+	/* Initialize TSQ */
+	card->tsq.org = dma_alloc_coherent(&card->pcidev->dev,
+					   NS_TSQSIZE + NS_TSQ_ALIGNMENT,
+					   &card->tsq.dma, GFP_KERNEL);
+	if (card->tsq.org == NULL) {
+		printk("nicstar%d: can't allocate TSQ.\n", i);
+		error = 10;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	card->tsq.base = PTR_ALIGN(card->tsq.org, NS_TSQ_ALIGNMENT);
+	card->tsq.next = card->tsq.base;
+	card->tsq.last = card->tsq.base + (NS_TSQ_NUM_ENTRIES - 1);
+	for (j = 0; j < NS_TSQ_NUM_ENTRIES; j++)
+		ns_tsi_init(card->tsq.base + j);
+	writel(0x00000000, card->membase + TSQH);
+	writel(ALIGN(card->tsq.dma, NS_TSQ_ALIGNMENT), card->membase + TSQB);
+	PRINTK("nicstar%d: TSQ base at 0x%p.\n", i, card->tsq.base);
+
+	/* Initialize RSQ */
+	card->rsq.org = dma_alloc_coherent(&card->pcidev->dev,
+					   NS_RSQSIZE + NS_RSQ_ALIGNMENT,
+					   &card->rsq.dma, GFP_KERNEL);
+	if (card->rsq.org == NULL) {
+		printk("nicstar%d: can't allocate RSQ.\n", i);
+		error = 11;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	card->rsq.base = PTR_ALIGN(card->rsq.org, NS_RSQ_ALIGNMENT);
+	card->rsq.next = card->rsq.base;
+	card->rsq.last = card->rsq.base + (NS_RSQ_NUM_ENTRIES - 1);
+	for (j = 0; j < NS_RSQ_NUM_ENTRIES; j++)
+		ns_rsqe_init(card->rsq.base + j);
+	writel(0x00000000, card->membase + RSQH);
+	writel(ALIGN(card->rsq.dma, NS_RSQ_ALIGNMENT), card->membase + RSQB);
+	PRINTK("nicstar%d: RSQ base at 0x%p.\n", i, card->rsq.base);
+
+	/* Initialize SCQ0, the only VBR SCQ used */
+	card->scq1 = NULL;
+	card->scq2 = NULL;
+	card->scq0 = get_scq(card, VBR_SCQSIZE, NS_VRSCD0);
+	if (card->scq0 == NULL) {
+		printk("nicstar%d: can't get SCQ0.\n", i);
+		error = 12;
+		ns_init_card_error(card, error);
+		return error;
+	}
+	u32d[0] = scq_virt_to_bus(card->scq0, card->scq0->base);
+	u32d[1] = (u32) 0x00000000;
+	u32d[2] = (u32) 0xffffffff;
+	u32d[3] = (u32) 0x00000000;
+	ns_write_sram(card, NS_VRSCD0, u32d, 4);
+	ns_write_sram(card, NS_VRSCD1, u32d, 4);	/* These last two won't be used */
+	ns_write_sram(card, NS_VRSCD2, u32d, 4);	/* but are initialized, just in case... */
+	card->scq0->scd = NS_VRSCD0;
+	PRINTK("nicstar%d: VBR-SCQ0 base at 0x%p.\n", i, card->scq0->base);
+
+	/* Initialize TSTs */
+	card->tst_addr = NS_TST0;
+	card->tst_free_entries = NS_TST_NUM_ENTRIES;
+	data = NS_TST_OPCODE_VARIABLE;
+	for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+		ns_write_sram(card, NS_TST0 + j, &data, 1);
+	data = ns_tste_make(NS_TST_OPCODE_END, NS_TST0);
+	ns_write_sram(card, NS_TST0 + NS_TST_NUM_ENTRIES, &data, 1);
+	for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+		ns_write_sram(card, NS_TST1 + j, &data, 1);
+	data = ns_tste_make(NS_TST_OPCODE_END, NS_TST1);
+	ns_write_sram(card, NS_TST1 + NS_TST_NUM_ENTRIES, &data, 1);
+	for (j = 0; j < NS_TST_NUM_ENTRIES; j++)
+		card->tste2vc[j] = NULL;
+	writel(NS_TST0 << 2, card->membase + TSTB);
+
+	/* Initialize RCT. AAL type is set on opening the VC. */
+#ifdef RCQ_SUPPORT
+	u32d[0] = NS_RCTE_RAWCELLINTEN;
+#else
+	u32d[0] = 0x00000000;
+#endif /* RCQ_SUPPORT */
+	u32d[1] = 0x00000000;
+	u32d[2] = 0x00000000;
+	u32d[3] = 0xFFFFFFFF;
+	for (j = 0; j < card->rct_size; j++)
+		ns_write_sram(card, j * 4, u32d, 4);
+
+	memset(card->vcmap, 0, NS_MAX_RCTSIZE * sizeof(vc_map));
+
+	for (j = 0; j < NS_FRSCD_NUM; j++)
+		card->scd2vc[j] = NULL;
+
+	/* Initialize buffer levels */
+	card->sbnr.min = MIN_SB;
+	card->sbnr.init = NUM_SB;
+	card->sbnr.max = MAX_SB;
+	card->lbnr.min = MIN_LB;
+	card->lbnr.init = NUM_LB;
+	card->lbnr.max = MAX_LB;
+	card->iovnr.min = MIN_IOVB;
+	card->iovnr.init = NUM_IOVB;
+	card->iovnr.max = MAX_IOVB;
+	card->hbnr.min = MIN_HB;
+	card->hbnr.init = NUM_HB;
+	card->hbnr.max = MAX_HB;
+
+	card->sm_handle = NULL;
+	card->sm_addr = 0x00000000;
+	card->lg_handle = NULL;
+	card->lg_addr = 0x00000000;
+
+	card->efbie = 1;	/* To prevent push_rxbufs from enabling the interrupt */
+
+	idr_init(&card->idr);
+
+	/* Pre-allocate some huge buffers */
+	skb_queue_head_init(&card->hbpool.queue);
+	card->hbpool.count = 0;
+	for (j = 0; j < NUM_HB; j++) {
+		struct sk_buff *hb;
+		hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
+		if (hb == NULL) {
+			printk
+			    ("nicstar%d: can't allocate %dth of %d huge buffers.\n",
+			     i, j, NUM_HB);
+			error = 13;
+			ns_init_card_error(card, error);
+			return error;
+		}
+		NS_PRV_BUFTYPE(hb) = BUF_NONE;
+		skb_queue_tail(&card->hbpool.queue, hb);
+		card->hbpool.count++;
+	}
+
+	/* Allocate large buffers */
+	skb_queue_head_init(&card->lbpool.queue);
+	card->lbpool.count = 0;	/* Not used */
+	for (j = 0; j < NUM_LB; j++) {
+		struct sk_buff *lb;
+		lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
+		if (lb == NULL) {
+			printk
+			    ("nicstar%d: can't allocate %dth of %d large buffers.\n",
+			     i, j, NUM_LB);
+			error = 14;
+			ns_init_card_error(card, error);
+			return error;
+		}
+		NS_PRV_BUFTYPE(lb) = BUF_LG;
+		skb_queue_tail(&card->lbpool.queue, lb);
+		skb_reserve(lb, NS_SMBUFSIZE);
+		push_rxbufs(card, lb);
+		/* Due to the implementation of push_rxbufs() this is 1, not 0 */
+		if (j == 1) {
+			card->rcbuf = lb;
+			card->rawcell = (struct ns_rcqe *) lb->data;
+			card->rawch = NS_PRV_DMA(lb);
+		}
+	}
+	/* Test for strange behaviour which leads to crashes */
+	if ((bcount =
+	     ns_stat_lfbqc_get(readl(card->membase + STAT))) < card->lbnr.min) {
+		printk
+		    ("nicstar%d: Strange... Just allocated %d large buffers and lfbqc = %d.\n",
+		     i, j, bcount);
+		error = 14;
+		ns_init_card_error(card, error);
+		return error;
+	}
+
+	/* Allocate small buffers */
+	skb_queue_head_init(&card->sbpool.queue);
+	card->sbpool.count = 0;	/* Not used */
+	for (j = 0; j < NUM_SB; j++) {
+		struct sk_buff *sb;
+		sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
+		if (sb == NULL) {
+			printk
+			    ("nicstar%d: can't allocate %dth of %d small buffers.\n",
+			     i, j, NUM_SB);
+			error = 15;
+			ns_init_card_error(card, error);
+			return error;
+		}
+		NS_PRV_BUFTYPE(sb) = BUF_SM;
+		skb_queue_tail(&card->sbpool.queue, sb);
+		skb_reserve(sb, NS_AAL0_HEADER);
+		push_rxbufs(card, sb);
+	}
+	/* Test for strange behaviour which leads to crashes */
+	if ((bcount =
+	     ns_stat_sfbqc_get(readl(card->membase + STAT))) < card->sbnr.min) {
+		printk
+		    ("nicstar%d: Strange... Just allocated %d small buffers and sfbqc = %d.\n",
+		     i, j, bcount);
+		error = 15;
+		ns_init_card_error(card, error);
+		return error;
+	}
+
+	/* Allocate iovec buffers */
+	skb_queue_head_init(&card->iovpool.queue);
+	card->iovpool.count = 0;
+	for (j = 0; j < NUM_IOVB; j++) {
+		struct sk_buff *iovb;
+		iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
+		if (iovb == NULL) {
+			printk
+			    ("nicstar%d: can't allocate %dth of %d iovec buffers.\n",
+			     i, j, NUM_IOVB);
+			error = 16;
+			ns_init_card_error(card, error);
+			return error;
+		}
+		NS_PRV_BUFTYPE(iovb) = BUF_NONE;
+		skb_queue_tail(&card->iovpool.queue, iovb);
+		card->iovpool.count++;
+	}
+
+	/* Configure NICStAR */
+	if (card->rct_size == 4096)
+		ns_cfg_rctsize = NS_CFG_RCTSIZE_4096_ENTRIES;
+	else			/* (card->rct_size == 16384) */
+		ns_cfg_rctsize = NS_CFG_RCTSIZE_16384_ENTRIES;
+
+	card->efbie = 1;
+
+	card->intcnt = 0;
+	if (request_irq
+	    (pcidev->irq, &ns_irq_handler, IRQF_SHARED, "nicstar", card) != 0) {
+		printk("nicstar%d: can't allocate IRQ %d.\n", i, pcidev->irq);
+		error = 9;
+		ns_init_card_error(card, error);
+		return error;
+	}
+
+	/* Register device */
+	card->atmdev = atm_dev_register("nicstar", &card->pcidev->dev, &atm_ops,
+					-1, NULL);
+	if (card->atmdev == NULL) {
+		printk("nicstar%d: can't register device.\n", i);
+		error = 17;
+		ns_init_card_error(card, error);
+		return error;
+	}
+
+	if (mac[i] == NULL || !mac_pton(mac[i], card->atmdev->esi)) {
+		nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
+				   card->atmdev->esi, 6);
+		if (ether_addr_equal(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00")) {
+			nicstar_read_eprom(card->membase,
+					   NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
+					   card->atmdev->esi, 6);
+		}
+	}
+
+	printk("nicstar%d: MAC address %pM\n", i, card->atmdev->esi);
+
+	card->atmdev->dev_data = card;
+	card->atmdev->ci_range.vpi_bits = card->vpibits;
+	card->atmdev->ci_range.vci_bits = card->vcibits;
+	card->atmdev->link_rate = card->max_pcr;
+	card->atmdev->phy = NULL;
+
+#ifdef CONFIG_ATM_NICSTAR_USE_SUNI
+	if (card->max_pcr == ATM_OC3_PCR)
+		suni_init(card->atmdev);
+#endif /* CONFIG_ATM_NICSTAR_USE_SUNI */
+
+#ifdef CONFIG_ATM_NICSTAR_USE_IDT77105
+	if (card->max_pcr == ATM_25_PCR)
+		idt77105_init(card->atmdev);
+#endif /* CONFIG_ATM_NICSTAR_USE_IDT77105 */
+
+	if (card->atmdev->phy && card->atmdev->phy->start)
+		card->atmdev->phy->start(card->atmdev);
+
+	writel(NS_CFG_RXPATH | NS_CFG_SMBUFSIZE | NS_CFG_LGBUFSIZE | NS_CFG_EFBIE | NS_CFG_RSQSIZE | NS_CFG_VPIBITS | ns_cfg_rctsize | NS_CFG_RXINT_NODELAY | NS_CFG_RAWIE |	/* Only enabled if RCQ_SUPPORT */
+	       NS_CFG_RSQAFIE | NS_CFG_TXEN | NS_CFG_TXIE | NS_CFG_TSQFIE_OPT |	/* Only enabled if ENABLE_TSQFIE */
+	       NS_CFG_PHYIE, card->membase + CFG);
+
+	num_cards++;
+
+	return error;
+}
+
+static void ns_init_card_error(ns_dev *card, int error)
+{
+	if (error >= 17) {
+		writel(0x00000000, card->membase + CFG);
+	}
+	if (error >= 16) {
+		struct sk_buff *iovb;
+		while ((iovb = skb_dequeue(&card->iovpool.queue)) != NULL)
+			dev_kfree_skb_any(iovb);
+	}
+	if (error >= 15) {
+		struct sk_buff *sb;
+		while ((sb = skb_dequeue(&card->sbpool.queue)) != NULL)
+			dev_kfree_skb_any(sb);
+		free_scq(card, card->scq0, NULL);
+	}
+	if (error >= 14) {
+		struct sk_buff *lb;
+		while ((lb = skb_dequeue(&card->lbpool.queue)) != NULL)
+			dev_kfree_skb_any(lb);
+	}
+	if (error >= 13) {
+		struct sk_buff *hb;
+		while ((hb = skb_dequeue(&card->hbpool.queue)) != NULL)
+			dev_kfree_skb_any(hb);
+	}
+	if (error >= 12) {
+		kfree(card->rsq.org);
+	}
+	if (error >= 11) {
+		kfree(card->tsq.org);
+	}
+	if (error >= 10) {
+		free_irq(card->pcidev->irq, card);
+	}
+	if (error >= 4) {
+		iounmap(card->membase);
+	}
+	if (error >= 3) {
+		pci_disable_device(card->pcidev);
+		kfree(card);
+	}
+}
+
+static scq_info *get_scq(ns_dev *card, int size, u32 scd)
+{
+	scq_info *scq;
+	int i;
+
+	if (size != VBR_SCQSIZE && size != CBR_SCQSIZE)
+		return NULL;
+
+	scq = kmalloc(sizeof(scq_info), GFP_KERNEL);
+	if (!scq)
+		return NULL;
+        scq->org = dma_alloc_coherent(&card->pcidev->dev,
+				      2 * size,  &scq->dma, GFP_KERNEL);
+	if (!scq->org) {
+		kfree(scq);
+		return NULL;
+	}
+	scq->skb = kmalloc(sizeof(struct sk_buff *) *
+			   (size / NS_SCQE_SIZE), GFP_KERNEL);
+	if (!scq->skb) {
+		kfree(scq->org);
+		kfree(scq);
+		return NULL;
+	}
+	scq->num_entries = size / NS_SCQE_SIZE;
+	scq->base = PTR_ALIGN(scq->org, size);
+	scq->next = scq->base;
+	scq->last = scq->base + (scq->num_entries - 1);
+	scq->tail = scq->last;
+	scq->scd = scd;
+	scq->num_entries = size / NS_SCQE_SIZE;
+	scq->tbd_count = 0;
+	init_waitqueue_head(&scq->scqfull_waitq);
+	scq->full = 0;
+	spin_lock_init(&scq->lock);
+
+	for (i = 0; i < scq->num_entries; i++)
+		scq->skb[i] = NULL;
+
+	return scq;
+}
+
+/* For variable rate SCQ vcc must be NULL */
+static void free_scq(ns_dev *card, scq_info *scq, struct atm_vcc *vcc)
+{
+	int i;
+
+	if (scq->num_entries == VBR_SCQ_NUM_ENTRIES)
+		for (i = 0; i < scq->num_entries; i++) {
+			if (scq->skb[i] != NULL) {
+				vcc = ATM_SKB(scq->skb[i])->vcc;
+				if (vcc->pop != NULL)
+					vcc->pop(vcc, scq->skb[i]);
+				else
+					dev_kfree_skb_any(scq->skb[i]);
+			}
+	} else {		/* vcc must be != NULL */
+
+		if (vcc == NULL) {
+			printk
+			    ("nicstar: free_scq() called with vcc == NULL for fixed rate scq.");
+			for (i = 0; i < scq->num_entries; i++)
+				dev_kfree_skb_any(scq->skb[i]);
+		} else
+			for (i = 0; i < scq->num_entries; i++) {
+				if (scq->skb[i] != NULL) {
+					if (vcc->pop != NULL)
+						vcc->pop(vcc, scq->skb[i]);
+					else
+						dev_kfree_skb_any(scq->skb[i]);
+				}
+			}
+	}
+	kfree(scq->skb);
+	dma_free_coherent(&card->pcidev->dev,
+			  2 * (scq->num_entries == VBR_SCQ_NUM_ENTRIES ?
+			       VBR_SCQSIZE : CBR_SCQSIZE),
+			  scq->org, scq->dma);
+	kfree(scq);
+}
+
+/* The handles passed must be pointers to the sk_buff containing the small
+   or large buffer(s) cast to u32. */
+static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
+{
+	struct sk_buff *handle1, *handle2;
+	int id1, id2;
+	u32 addr1, addr2;
+	u32 stat;
+	unsigned long flags;
+
+	/* *BARF* */
+	handle2 = NULL;
+	addr2 = 0;
+	handle1 = skb;
+	addr1 = dma_map_single(&card->pcidev->dev,
+			       skb->data,
+			       (NS_PRV_BUFTYPE(skb) == BUF_SM
+				? NS_SMSKBSIZE : NS_LGSKBSIZE),
+			       DMA_TO_DEVICE);
+	NS_PRV_DMA(skb) = addr1; /* save so we can unmap later */
+
+#ifdef GENERAL_DEBUG
+	if (!addr1)
+		printk("nicstar%d: push_rxbufs called with addr1 = 0.\n",
+		       card->index);
+#endif /* GENERAL_DEBUG */
+
+	stat = readl(card->membase + STAT);
+	card->sbfqc = ns_stat_sfbqc_get(stat);
+	card->lbfqc = ns_stat_lfbqc_get(stat);
+	if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
+		if (!addr2) {
+			if (card->sm_addr) {
+				addr2 = card->sm_addr;
+				handle2 = card->sm_handle;
+				card->sm_addr = 0x00000000;
+				card->sm_handle = NULL;
+			} else {	/* (!sm_addr) */
+
+				card->sm_addr = addr1;
+				card->sm_handle = handle1;
+			}
+		}
+	} else {		/* buf_type == BUF_LG */
+
+		if (!addr2) {
+			if (card->lg_addr) {
+				addr2 = card->lg_addr;
+				handle2 = card->lg_handle;
+				card->lg_addr = 0x00000000;
+				card->lg_handle = NULL;
+			} else {	/* (!lg_addr) */
+
+				card->lg_addr = addr1;
+				card->lg_handle = handle1;
+			}
+		}
+	}
+
+	if (addr2) {
+		if (NS_PRV_BUFTYPE(skb) == BUF_SM) {
+			if (card->sbfqc >= card->sbnr.max) {
+				skb_unlink(handle1, &card->sbpool.queue);
+				dev_kfree_skb_any(handle1);
+				skb_unlink(handle2, &card->sbpool.queue);
+				dev_kfree_skb_any(handle2);
+				return;
+			} else
+				card->sbfqc += 2;
+		} else {	/* (buf_type == BUF_LG) */
+
+			if (card->lbfqc >= card->lbnr.max) {
+				skb_unlink(handle1, &card->lbpool.queue);
+				dev_kfree_skb_any(handle1);
+				skb_unlink(handle2, &card->lbpool.queue);
+				dev_kfree_skb_any(handle2);
+				return;
+			} else
+				card->lbfqc += 2;
+		}
+
+		id1 = idr_alloc(&card->idr, handle1, 0, 0, GFP_ATOMIC);
+		if (id1 < 0)
+			goto out;
+
+		id2 = idr_alloc(&card->idr, handle2, 0, 0, GFP_ATOMIC);
+		if (id2 < 0)
+			goto out;
+
+		spin_lock_irqsave(&card->res_lock, flags);
+		while (CMD_BUSY(card)) ;
+		writel(addr2, card->membase + DR3);
+		writel(id2, card->membase + DR2);
+		writel(addr1, card->membase + DR1);
+		writel(id1, card->membase + DR0);
+		writel(NS_CMD_WRITE_FREEBUFQ | NS_PRV_BUFTYPE(skb),
+		       card->membase + CMD);
+		spin_unlock_irqrestore(&card->res_lock, flags);
+
+		XPRINTK("nicstar%d: Pushing %s buffers at 0x%x and 0x%x.\n",
+			card->index,
+			(NS_PRV_BUFTYPE(skb) == BUF_SM ? "small" : "large"),
+			addr1, addr2);
+	}
+
+	if (!card->efbie && card->sbfqc >= card->sbnr.min &&
+	    card->lbfqc >= card->lbnr.min) {
+		card->efbie = 1;
+		writel((readl(card->membase + CFG) | NS_CFG_EFBIE),
+		       card->membase + CFG);
+	}
+
+out:
+	return;
+}
+
+static irqreturn_t ns_irq_handler(int irq, void *dev_id)
+{
+	u32 stat_r;
+	ns_dev *card;
+	struct atm_dev *dev;
+	unsigned long flags;
+
+	card = (ns_dev *) dev_id;
+	dev = card->atmdev;
+	card->intcnt++;
+
+	PRINTK("nicstar%d: NICStAR generated an interrupt\n", card->index);
+
+	spin_lock_irqsave(&card->int_lock, flags);
+
+	stat_r = readl(card->membase + STAT);
+
+	/* Transmit Status Indicator has been written to T. S. Queue */
+	if (stat_r & NS_STAT_TSIF) {
+		TXPRINTK("nicstar%d: TSI interrupt\n", card->index);
+		process_tsq(card);
+		writel(NS_STAT_TSIF, card->membase + STAT);
+	}
+
+	/* Incomplete CS-PDU has been transmitted */
+	if (stat_r & NS_STAT_TXICP) {
+		writel(NS_STAT_TXICP, card->membase + STAT);
+		TXPRINTK("nicstar%d: Incomplete CS-PDU transmitted.\n",
+			 card->index);
+	}
+
+	/* Transmit Status Queue 7/8 full */
+	if (stat_r & NS_STAT_TSQF) {
+		writel(NS_STAT_TSQF, card->membase + STAT);
+		PRINTK("nicstar%d: TSQ full.\n", card->index);
+		process_tsq(card);
+	}
+
+	/* Timer overflow */
+	if (stat_r & NS_STAT_TMROF) {
+		writel(NS_STAT_TMROF, card->membase + STAT);
+		PRINTK("nicstar%d: Timer overflow.\n", card->index);
+	}
+
+	/* PHY device interrupt signal active */
+	if (stat_r & NS_STAT_PHYI) {
+		writel(NS_STAT_PHYI, card->membase + STAT);
+		PRINTK("nicstar%d: PHY interrupt.\n", card->index);
+		if (dev->phy && dev->phy->interrupt) {
+			dev->phy->interrupt(dev);
+		}
+	}
+
+	/* Small Buffer Queue is full */
+	if (stat_r & NS_STAT_SFBQF) {
+		writel(NS_STAT_SFBQF, card->membase + STAT);
+		printk("nicstar%d: Small free buffer queue is full.\n",
+		       card->index);
+	}
+
+	/* Large Buffer Queue is full */
+	if (stat_r & NS_STAT_LFBQF) {
+		writel(NS_STAT_LFBQF, card->membase + STAT);
+		printk("nicstar%d: Large free buffer queue is full.\n",
+		       card->index);
+	}
+
+	/* Receive Status Queue is full */
+	if (stat_r & NS_STAT_RSQF) {
+		writel(NS_STAT_RSQF, card->membase + STAT);
+		printk("nicstar%d: RSQ full.\n", card->index);
+		process_rsq(card);
+	}
+
+	/* Complete CS-PDU received */
+	if (stat_r & NS_STAT_EOPDU) {
+		RXPRINTK("nicstar%d: End of CS-PDU received.\n", card->index);
+		process_rsq(card);
+		writel(NS_STAT_EOPDU, card->membase + STAT);
+	}
+
+	/* Raw cell received */
+	if (stat_r & NS_STAT_RAWCF) {
+		writel(NS_STAT_RAWCF, card->membase + STAT);
+#ifndef RCQ_SUPPORT
+		printk("nicstar%d: Raw cell received and no support yet...\n",
+		       card->index);
+#endif /* RCQ_SUPPORT */
+		/* NOTE: the following procedure may keep a raw cell pending until the
+		   next interrupt. As this preliminary support is only meant to
+		   avoid buffer leakage, this is not an issue. */
+		while (readl(card->membase + RAWCT) != card->rawch) {
+
+			if (ns_rcqe_islast(card->rawcell)) {
+				struct sk_buff *oldbuf;
+
+				oldbuf = card->rcbuf;
+				card->rcbuf = idr_find(&card->idr,
+						       ns_rcqe_nextbufhandle(card->rawcell));
+				card->rawch = NS_PRV_DMA(card->rcbuf);
+				card->rawcell = (struct ns_rcqe *)
+						card->rcbuf->data;
+				recycle_rx_buf(card, oldbuf);
+			} else {
+				card->rawch += NS_RCQE_SIZE;
+				card->rawcell++;
+			}
+		}
+	}
+
+	/* Small buffer queue is empty */
+	if (stat_r & NS_STAT_SFBQE) {
+		int i;
+		struct sk_buff *sb;
+
+		writel(NS_STAT_SFBQE, card->membase + STAT);
+		printk("nicstar%d: Small free buffer queue empty.\n",
+		       card->index);
+		for (i = 0; i < card->sbnr.min; i++) {
+			sb = dev_alloc_skb(NS_SMSKBSIZE);
+			if (sb == NULL) {
+				writel(readl(card->membase + CFG) &
+				       ~NS_CFG_EFBIE, card->membase + CFG);
+				card->efbie = 0;
+				break;
+			}
+			NS_PRV_BUFTYPE(sb) = BUF_SM;
+			skb_queue_tail(&card->sbpool.queue, sb);
+			skb_reserve(sb, NS_AAL0_HEADER);
+			push_rxbufs(card, sb);
+		}
+		card->sbfqc = i;
+		process_rsq(card);
+	}
+
+	/* Large buffer queue empty */
+	if (stat_r & NS_STAT_LFBQE) {
+		int i;
+		struct sk_buff *lb;
+
+		writel(NS_STAT_LFBQE, card->membase + STAT);
+		printk("nicstar%d: Large free buffer queue empty.\n",
+		       card->index);
+		for (i = 0; i < card->lbnr.min; i++) {
+			lb = dev_alloc_skb(NS_LGSKBSIZE);
+			if (lb == NULL) {
+				writel(readl(card->membase + CFG) &
+				       ~NS_CFG_EFBIE, card->membase + CFG);
+				card->efbie = 0;
+				break;
+			}
+			NS_PRV_BUFTYPE(lb) = BUF_LG;
+			skb_queue_tail(&card->lbpool.queue, lb);
+			skb_reserve(lb, NS_SMBUFSIZE);
+			push_rxbufs(card, lb);
+		}
+		card->lbfqc = i;
+		process_rsq(card);
+	}
+
+	/* Receive Status Queue is 7/8 full */
+	if (stat_r & NS_STAT_RSQAF) {
+		writel(NS_STAT_RSQAF, card->membase + STAT);
+		RXPRINTK("nicstar%d: RSQ almost full.\n", card->index);
+		process_rsq(card);
+	}
+
+	spin_unlock_irqrestore(&card->int_lock, flags);
+	PRINTK("nicstar%d: end of interrupt service\n", card->index);
+	return IRQ_HANDLED;
+}
+
+static int ns_open(struct atm_vcc *vcc)
+{
+	ns_dev *card;
+	vc_map *vc;
+	unsigned long tmpl, modl;
+	int tcr, tcra;		/* target cell rate, and absolute value */
+	int n = 0;		/* Number of entries in the TST. Initialized to remove
+				   the compiler warning. */
+	u32 u32d[4];
+	int frscdi = 0;		/* Index of the SCD. Initialized to remove the compiler
+				   warning. How I wish compilers were clever enough to
+				   tell which variables can truly be used
+				   uninitialized... */
+	int inuse;		/* tx or rx vc already in use by another vcc */
+	short vpi = vcc->vpi;
+	int vci = vcc->vci;
+
+	card = (ns_dev *) vcc->dev->dev_data;
+	PRINTK("nicstar%d: opening vpi.vci %d.%d \n", card->index, (int)vpi,
+	       vci);
+	if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
+		PRINTK("nicstar%d: unsupported AAL.\n", card->index);
+		return -EINVAL;
+	}
+
+	vc = &(card->vcmap[vpi << card->vcibits | vci]);
+	vcc->dev_data = vc;
+
+	inuse = 0;
+	if (vcc->qos.txtp.traffic_class != ATM_NONE && vc->tx)
+		inuse = 1;
+	if (vcc->qos.rxtp.traffic_class != ATM_NONE && vc->rx)
+		inuse += 2;
+	if (inuse) {
+		printk("nicstar%d: %s vci already in use.\n", card->index,
+		       inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
+		return -EINVAL;
+	}
+
+	set_bit(ATM_VF_ADDR, &vcc->flags);
+
+	/* NOTE: You are not allowed to modify an open connection's QOS. To change
+	   that, remove the ATM_VF_PARTIAL flag checking. There may be other changes
+	   needed to do that. */
+	if (!test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
+		scq_info *scq;
+
+		set_bit(ATM_VF_PARTIAL, &vcc->flags);
+		if (vcc->qos.txtp.traffic_class == ATM_CBR) {
+			/* Check requested cell rate and availability of SCD */
+			if (vcc->qos.txtp.max_pcr == 0 && vcc->qos.txtp.pcr == 0
+			    && vcc->qos.txtp.min_pcr == 0) {
+				PRINTK
+				    ("nicstar%d: trying to open a CBR vc with cell rate = 0 \n",
+				     card->index);
+				clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+				clear_bit(ATM_VF_ADDR, &vcc->flags);
+				return -EINVAL;
+			}
+
+			tcr = atm_pcr_goal(&(vcc->qos.txtp));
+			tcra = tcr >= 0 ? tcr : -tcr;
+
+			PRINTK("nicstar%d: target cell rate = %d.\n",
+			       card->index, vcc->qos.txtp.max_pcr);
+
+			tmpl =
+			    (unsigned long)tcra *(unsigned long)
+			    NS_TST_NUM_ENTRIES;
+			modl = tmpl % card->max_pcr;
+
+			n = (int)(tmpl / card->max_pcr);
+			if (tcr > 0) {
+				if (modl > 0)
+					n++;
+			} else if (tcr == 0) {
+				if ((n =
+				     (card->tst_free_entries -
+				      NS_TST_RESERVED)) <= 0) {
+					PRINTK
+					    ("nicstar%d: no CBR bandwidth free.\n",
+					     card->index);
+					clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+					clear_bit(ATM_VF_ADDR, &vcc->flags);
+					return -EINVAL;
+				}
+			}
+
+			if (n == 0) {
+				printk
+				    ("nicstar%d: selected bandwidth < granularity.\n",
+				     card->index);
+				clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+				clear_bit(ATM_VF_ADDR, &vcc->flags);
+				return -EINVAL;
+			}
+
+			if (n > (card->tst_free_entries - NS_TST_RESERVED)) {
+				PRINTK
+				    ("nicstar%d: not enough free CBR bandwidth.\n",
+				     card->index);
+				clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+				clear_bit(ATM_VF_ADDR, &vcc->flags);
+				return -EINVAL;
+			} else
+				card->tst_free_entries -= n;
+
+			XPRINTK("nicstar%d: writing %d tst entries.\n",
+				card->index, n);
+			for (frscdi = 0; frscdi < NS_FRSCD_NUM; frscdi++) {
+				if (card->scd2vc[frscdi] == NULL) {
+					card->scd2vc[frscdi] = vc;
+					break;
+				}
+			}
+			if (frscdi == NS_FRSCD_NUM) {
+				PRINTK
+				    ("nicstar%d: no SCD available for CBR channel.\n",
+				     card->index);
+				card->tst_free_entries += n;
+				clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+				clear_bit(ATM_VF_ADDR, &vcc->flags);
+				return -EBUSY;
+			}
+
+			vc->cbr_scd = NS_FRSCD + frscdi * NS_FRSCD_SIZE;
+
+			scq = get_scq(card, CBR_SCQSIZE, vc->cbr_scd);
+			if (scq == NULL) {
+				PRINTK("nicstar%d: can't get fixed rate SCQ.\n",
+				       card->index);
+				card->scd2vc[frscdi] = NULL;
+				card->tst_free_entries += n;
+				clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+				clear_bit(ATM_VF_ADDR, &vcc->flags);
+				return -ENOMEM;
+			}
+			vc->scq = scq;
+			u32d[0] = scq_virt_to_bus(scq, scq->base);
+			u32d[1] = (u32) 0x00000000;
+			u32d[2] = (u32) 0xffffffff;
+			u32d[3] = (u32) 0x00000000;
+			ns_write_sram(card, vc->cbr_scd, u32d, 4);
+
+			fill_tst(card, n, vc);
+		} else if (vcc->qos.txtp.traffic_class == ATM_UBR) {
+			vc->cbr_scd = 0x00000000;
+			vc->scq = card->scq0;
+		}
+
+		if (vcc->qos.txtp.traffic_class != ATM_NONE) {
+			vc->tx = 1;
+			vc->tx_vcc = vcc;
+			vc->tbd_count = 0;
+		}
+		if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
+			u32 status;
+
+			vc->rx = 1;
+			vc->rx_vcc = vcc;
+			vc->rx_iov = NULL;
+
+			/* Open the connection in hardware */
+			if (vcc->qos.aal == ATM_AAL5)
+				status = NS_RCTE_AAL5 | NS_RCTE_CONNECTOPEN;
+			else	/* vcc->qos.aal == ATM_AAL0 */
+				status = NS_RCTE_AAL0 | NS_RCTE_CONNECTOPEN;
+#ifdef RCQ_SUPPORT
+			status |= NS_RCTE_RAWCELLINTEN;
+#endif /* RCQ_SUPPORT */
+			ns_write_sram(card,
+				      NS_RCT +
+				      (vpi << card->vcibits | vci) *
+				      NS_RCT_ENTRY_SIZE, &status, 1);
+		}
+
+	}
+
+	set_bit(ATM_VF_READY, &vcc->flags);
+	return 0;
+}
+
+static void ns_close(struct atm_vcc *vcc)
+{
+	vc_map *vc;
+	ns_dev *card;
+	u32 data;
+	int i;
+
+	vc = vcc->dev_data;
+	card = vcc->dev->dev_data;
+	PRINTK("nicstar%d: closing vpi.vci %d.%d \n", card->index,
+	       (int)vcc->vpi, vcc->vci);
+
+	clear_bit(ATM_VF_READY, &vcc->flags);
+
+	if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
+		u32 addr;
+		unsigned long flags;
+
+		addr =
+		    NS_RCT +
+		    (vcc->vpi << card->vcibits | vcc->vci) * NS_RCT_ENTRY_SIZE;
+		spin_lock_irqsave(&card->res_lock, flags);
+		while (CMD_BUSY(card)) ;
+		writel(NS_CMD_CLOSE_CONNECTION | addr << 2,
+		       card->membase + CMD);
+		spin_unlock_irqrestore(&card->res_lock, flags);
+
+		vc->rx = 0;
+		if (vc->rx_iov != NULL) {
+			struct sk_buff *iovb;
+			u32 stat;
+
+			stat = readl(card->membase + STAT);
+			card->sbfqc = ns_stat_sfbqc_get(stat);
+			card->lbfqc = ns_stat_lfbqc_get(stat);
+
+			PRINTK
+			    ("nicstar%d: closing a VC with pending rx buffers.\n",
+			     card->index);
+			iovb = vc->rx_iov;
+			recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+					      NS_PRV_IOVCNT(iovb));
+			NS_PRV_IOVCNT(iovb) = 0;
+			spin_lock_irqsave(&card->int_lock, flags);
+			recycle_iov_buf(card, iovb);
+			spin_unlock_irqrestore(&card->int_lock, flags);
+			vc->rx_iov = NULL;
+		}
+	}
+
+	if (vcc->qos.txtp.traffic_class != ATM_NONE) {
+		vc->tx = 0;
+	}
+
+	if (vcc->qos.txtp.traffic_class == ATM_CBR) {
+		unsigned long flags;
+		ns_scqe *scqep;
+		scq_info *scq;
+
+		scq = vc->scq;
+
+		for (;;) {
+			spin_lock_irqsave(&scq->lock, flags);
+			scqep = scq->next;
+			if (scqep == scq->base)
+				scqep = scq->last;
+			else
+				scqep--;
+			if (scqep == scq->tail) {
+				spin_unlock_irqrestore(&scq->lock, flags);
+				break;
+			}
+			/* If the last entry is not a TSR, place one in the SCQ in order to
+			   be able to completely drain it and then close. */
+			if (!ns_scqe_is_tsr(scqep) && scq->tail != scq->next) {
+				ns_scqe tsr;
+				u32 scdi, scqi;
+				u32 data;
+				int index;
+
+				tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
+				scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
+				scqi = scq->next - scq->base;
+				tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
+				tsr.word_3 = 0x00000000;
+				tsr.word_4 = 0x00000000;
+				*scq->next = tsr;
+				index = (int)scqi;
+				scq->skb[index] = NULL;
+				if (scq->next == scq->last)
+					scq->next = scq->base;
+				else
+					scq->next++;
+				data = scq_virt_to_bus(scq, scq->next);
+				ns_write_sram(card, scq->scd, &data, 1);
+			}
+			spin_unlock_irqrestore(&scq->lock, flags);
+			schedule();
+		}
+
+		/* Free all TST entries */
+		data = NS_TST_OPCODE_VARIABLE;
+		for (i = 0; i < NS_TST_NUM_ENTRIES; i++) {
+			if (card->tste2vc[i] == vc) {
+				ns_write_sram(card, card->tst_addr + i, &data,
+					      1);
+				card->tste2vc[i] = NULL;
+				card->tst_free_entries++;
+			}
+		}
+
+		card->scd2vc[(vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE] = NULL;
+		free_scq(card, vc->scq, vcc);
+	}
+
+	/* remove all references to vcc before deleting it */
+	if (vcc->qos.txtp.traffic_class != ATM_NONE) {
+		unsigned long flags;
+		scq_info *scq = card->scq0;
+
+		spin_lock_irqsave(&scq->lock, flags);
+
+		for (i = 0; i < scq->num_entries; i++) {
+			if (scq->skb[i] && ATM_SKB(scq->skb[i])->vcc == vcc) {
+				ATM_SKB(scq->skb[i])->vcc = NULL;
+				atm_return(vcc, scq->skb[i]->truesize);
+				PRINTK
+				    ("nicstar: deleted pending vcc mapping\n");
+			}
+		}
+
+		spin_unlock_irqrestore(&scq->lock, flags);
+	}
+
+	vcc->dev_data = NULL;
+	clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+	clear_bit(ATM_VF_ADDR, &vcc->flags);
+
+#ifdef RX_DEBUG
+	{
+		u32 stat, cfg;
+		stat = readl(card->membase + STAT);
+		cfg = readl(card->membase + CFG);
+		printk("STAT = 0x%08X  CFG = 0x%08X  \n", stat, cfg);
+		printk
+		    ("TSQ: base = 0x%p  next = 0x%p  last = 0x%p  TSQT = 0x%08X \n",
+		     card->tsq.base, card->tsq.next,
+		     card->tsq.last, readl(card->membase + TSQT));
+		printk
+		    ("RSQ: base = 0x%p  next = 0x%p  last = 0x%p  RSQT = 0x%08X \n",
+		     card->rsq.base, card->rsq.next,
+		     card->rsq.last, readl(card->membase + RSQT));
+		printk("Empty free buffer queue interrupt %s \n",
+		       card->efbie ? "enabled" : "disabled");
+		printk("SBCNT = %d  count = %d   LBCNT = %d count = %d \n",
+		       ns_stat_sfbqc_get(stat), card->sbpool.count,
+		       ns_stat_lfbqc_get(stat), card->lbpool.count);
+		printk("hbpool.count = %d  iovpool.count = %d \n",
+		       card->hbpool.count, card->iovpool.count);
+	}
+#endif /* RX_DEBUG */
+}
+
+static void fill_tst(ns_dev * card, int n, vc_map * vc)
+{
+	u32 new_tst;
+	unsigned long cl;
+	int e, r;
+	u32 data;
+
+	/* It would be very complicated to keep the two TSTs synchronized while
+	   assuring that writes are only made to the inactive TST. So, for now I
+	   will use only one TST. If problems occur, I will change this again */
+
+	new_tst = card->tst_addr;
+
+	/* Fill procedure */
+
+	for (e = 0; e < NS_TST_NUM_ENTRIES; e++) {
+		if (card->tste2vc[e] == NULL)
+			break;
+	}
+	if (e == NS_TST_NUM_ENTRIES) {
+		printk("nicstar%d: No free TST entries found. \n", card->index);
+		return;
+	}
+
+	r = n;
+	cl = NS_TST_NUM_ENTRIES;
+	data = ns_tste_make(NS_TST_OPCODE_FIXED, vc->cbr_scd);
+
+	while (r > 0) {
+		if (cl >= NS_TST_NUM_ENTRIES && card->tste2vc[e] == NULL) {
+			card->tste2vc[e] = vc;
+			ns_write_sram(card, new_tst + e, &data, 1);
+			cl -= NS_TST_NUM_ENTRIES;
+			r--;
+		}
+
+		if (++e == NS_TST_NUM_ENTRIES) {
+			e = 0;
+		}
+		cl += n;
+	}
+
+	/* End of fill procedure */
+
+	data = ns_tste_make(NS_TST_OPCODE_END, new_tst);
+	ns_write_sram(card, new_tst + NS_TST_NUM_ENTRIES, &data, 1);
+	ns_write_sram(card, card->tst_addr + NS_TST_NUM_ENTRIES, &data, 1);
+	card->tst_addr = new_tst;
+}
+
+static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+	ns_dev *card;
+	vc_map *vc;
+	scq_info *scq;
+	unsigned long buflen;
+	ns_scqe scqe;
+	u32 flags;		/* TBD flags, not CPU flags */
+
+	card = vcc->dev->dev_data;
+	TXPRINTK("nicstar%d: ns_send() called.\n", card->index);
+	if ((vc = (vc_map *) vcc->dev_data) == NULL) {
+		printk("nicstar%d: vcc->dev_data == NULL on ns_send().\n",
+		       card->index);
+		atomic_inc(&vcc->stats->tx_err);
+		dev_kfree_skb_any(skb);
+		return -EINVAL;
+	}
+
+	if (!vc->tx) {
+		printk("nicstar%d: Trying to transmit on a non-tx VC.\n",
+		       card->index);
+		atomic_inc(&vcc->stats->tx_err);
+		dev_kfree_skb_any(skb);
+		return -EINVAL;
+	}
+
+	if (vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0) {
+		printk("nicstar%d: Only AAL0 and AAL5 are supported.\n",
+		       card->index);
+		atomic_inc(&vcc->stats->tx_err);
+		dev_kfree_skb_any(skb);
+		return -EINVAL;
+	}
+
+	if (skb_shinfo(skb)->nr_frags != 0) {
+		printk("nicstar%d: No scatter-gather yet.\n", card->index);
+		atomic_inc(&vcc->stats->tx_err);
+		dev_kfree_skb_any(skb);
+		return -EINVAL;
+	}
+
+	ATM_SKB(skb)->vcc = vcc;
+
+	NS_PRV_DMA(skb) = dma_map_single(&card->pcidev->dev, skb->data,
+					 skb->len, DMA_TO_DEVICE);
+
+	if (vcc->qos.aal == ATM_AAL5) {
+		buflen = (skb->len + 47 + 8) / 48 * 48;	/* Multiple of 48 */
+		flags = NS_TBD_AAL5;
+		scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb));
+		scqe.word_3 = cpu_to_le32(skb->len);
+		scqe.word_4 =
+		    ns_tbd_mkword_4(0, (u32) vcc->vpi, (u32) vcc->vci, 0,
+				    ATM_SKB(skb)->
+				    atm_options & ATM_ATMOPT_CLP ? 1 : 0);
+		flags |= NS_TBD_EOPDU;
+	} else {		/* (vcc->qos.aal == ATM_AAL0) */
+
+		buflen = ATM_CELL_PAYLOAD;	/* i.e., 48 bytes */
+		flags = NS_TBD_AAL0;
+		scqe.word_2 = cpu_to_le32(NS_PRV_DMA(skb) + NS_AAL0_HEADER);
+		scqe.word_3 = cpu_to_le32(0x00000000);
+		if (*skb->data & 0x02)	/* Payload type 1 - end of pdu */
+			flags |= NS_TBD_EOPDU;
+		scqe.word_4 =
+		    cpu_to_le32(*((u32 *) skb->data) & ~NS_TBD_VC_MASK);
+		/* Force the VPI/VCI to be the same as in VCC struct */
+		scqe.word_4 |=
+		    cpu_to_le32((((u32) vcc->
+				  vpi) << NS_TBD_VPI_SHIFT | ((u32) vcc->
+							      vci) <<
+				 NS_TBD_VCI_SHIFT) & NS_TBD_VC_MASK);
+	}
+
+	if (vcc->qos.txtp.traffic_class == ATM_CBR) {
+		scqe.word_1 = ns_tbd_mkword_1_novbr(flags, (u32) buflen);
+		scq = ((vc_map *) vcc->dev_data)->scq;
+	} else {
+		scqe.word_1 =
+		    ns_tbd_mkword_1(flags, (u32) 1, (u32) 1, (u32) buflen);
+		scq = card->scq0;
+	}
+
+	if (push_scqe(card, vc, scq, &scqe, skb) != 0) {
+		atomic_inc(&vcc->stats->tx_err);
+		dev_kfree_skb_any(skb);
+		return -EIO;
+	}
+	atomic_inc(&vcc->stats->tx);
+
+	return 0;
+}
+
+static int push_scqe(ns_dev * card, vc_map * vc, scq_info * scq, ns_scqe * tbd,
+		     struct sk_buff *skb)
+{
+	unsigned long flags;
+	ns_scqe tsr;
+	u32 scdi, scqi;
+	int scq_is_vbr;
+	u32 data;
+	int index;
+
+	spin_lock_irqsave(&scq->lock, flags);
+	while (scq->tail == scq->next) {
+		if (in_interrupt()) {
+			spin_unlock_irqrestore(&scq->lock, flags);
+			printk("nicstar%d: Error pushing TBD.\n", card->index);
+			return 1;
+		}
+
+		scq->full = 1;
+		wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
+							  scq->tail != scq->next,
+							  scq->lock,
+							  SCQFULL_TIMEOUT);
+
+		if (scq->full) {
+			spin_unlock_irqrestore(&scq->lock, flags);
+			printk("nicstar%d: Timeout pushing TBD.\n",
+			       card->index);
+			return 1;
+		}
+	}
+	*scq->next = *tbd;
+	index = (int)(scq->next - scq->base);
+	scq->skb[index] = skb;
+	XPRINTK("nicstar%d: sending skb at 0x%p (pos %d).\n",
+		card->index, skb, index);
+	XPRINTK("nicstar%d: TBD written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
+		card->index, le32_to_cpu(tbd->word_1), le32_to_cpu(tbd->word_2),
+		le32_to_cpu(tbd->word_3), le32_to_cpu(tbd->word_4),
+		scq->next);
+	if (scq->next == scq->last)
+		scq->next = scq->base;
+	else
+		scq->next++;
+
+	vc->tbd_count++;
+	if (scq->num_entries == VBR_SCQ_NUM_ENTRIES) {
+		scq->tbd_count++;
+		scq_is_vbr = 1;
+	} else
+		scq_is_vbr = 0;
+
+	if (vc->tbd_count >= MAX_TBD_PER_VC
+	    || scq->tbd_count >= MAX_TBD_PER_SCQ) {
+		int has_run = 0;
+
+		while (scq->tail == scq->next) {
+			if (in_interrupt()) {
+				data = scq_virt_to_bus(scq, scq->next);
+				ns_write_sram(card, scq->scd, &data, 1);
+				spin_unlock_irqrestore(&scq->lock, flags);
+				printk("nicstar%d: Error pushing TSR.\n",
+				       card->index);
+				return 0;
+			}
+
+			scq->full = 1;
+			if (has_run++)
+				break;
+			wait_event_interruptible_lock_irq_timeout(scq->scqfull_waitq,
+								  scq->tail != scq->next,
+								  scq->lock,
+								  SCQFULL_TIMEOUT);
+		}
+
+		if (!scq->full) {
+			tsr.word_1 = ns_tsr_mkword_1(NS_TSR_INTENABLE);
+			if (scq_is_vbr)
+				scdi = NS_TSR_SCDISVBR;
+			else
+				scdi = (vc->cbr_scd - NS_FRSCD) / NS_FRSCD_SIZE;
+			scqi = scq->next - scq->base;
+			tsr.word_2 = ns_tsr_mkword_2(scdi, scqi);
+			tsr.word_3 = 0x00000000;
+			tsr.word_4 = 0x00000000;
+
+			*scq->next = tsr;
+			index = (int)scqi;
+			scq->skb[index] = NULL;
+			XPRINTK
+			    ("nicstar%d: TSR written:\n0x%x\n0x%x\n0x%x\n0x%x\n at 0x%p.\n",
+			     card->index, le32_to_cpu(tsr.word_1),
+			     le32_to_cpu(tsr.word_2), le32_to_cpu(tsr.word_3),
+			     le32_to_cpu(tsr.word_4), scq->next);
+			if (scq->next == scq->last)
+				scq->next = scq->base;
+			else
+				scq->next++;
+			vc->tbd_count = 0;
+			scq->tbd_count = 0;
+		} else
+			PRINTK("nicstar%d: Timeout pushing TSR.\n",
+			       card->index);
+	}
+	data = scq_virt_to_bus(scq, scq->next);
+	ns_write_sram(card, scq->scd, &data, 1);
+
+	spin_unlock_irqrestore(&scq->lock, flags);
+
+	return 0;
+}
+
+static void process_tsq(ns_dev * card)
+{
+	u32 scdi;
+	scq_info *scq;
+	ns_tsi *previous = NULL, *one_ahead, *two_ahead;
+	int serviced_entries;	/* flag indicating at least on entry was serviced */
+
+	serviced_entries = 0;
+
+	if (card->tsq.next == card->tsq.last)
+		one_ahead = card->tsq.base;
+	else
+		one_ahead = card->tsq.next + 1;
+
+	if (one_ahead == card->tsq.last)
+		two_ahead = card->tsq.base;
+	else
+		two_ahead = one_ahead + 1;
+
+	while (!ns_tsi_isempty(card->tsq.next) || !ns_tsi_isempty(one_ahead) ||
+	       !ns_tsi_isempty(two_ahead))
+		/* At most two empty, as stated in the 77201 errata */
+	{
+		serviced_entries = 1;
+
+		/* Skip the one or two possible empty entries */
+		while (ns_tsi_isempty(card->tsq.next)) {
+			if (card->tsq.next == card->tsq.last)
+				card->tsq.next = card->tsq.base;
+			else
+				card->tsq.next++;
+		}
+
+		if (!ns_tsi_tmrof(card->tsq.next)) {
+			scdi = ns_tsi_getscdindex(card->tsq.next);
+			if (scdi == NS_TSI_SCDISVBR)
+				scq = card->scq0;
+			else {
+				if (card->scd2vc[scdi] == NULL) {
+					printk
+					    ("nicstar%d: could not find VC from SCD index.\n",
+					     card->index);
+					ns_tsi_init(card->tsq.next);
+					return;
+				}
+				scq = card->scd2vc[scdi]->scq;
+			}
+			drain_scq(card, scq, ns_tsi_getscqpos(card->tsq.next));
+			scq->full = 0;
+			wake_up_interruptible(&(scq->scqfull_waitq));
+		}
+
+		ns_tsi_init(card->tsq.next);
+		previous = card->tsq.next;
+		if (card->tsq.next == card->tsq.last)
+			card->tsq.next = card->tsq.base;
+		else
+			card->tsq.next++;
+
+		if (card->tsq.next == card->tsq.last)
+			one_ahead = card->tsq.base;
+		else
+			one_ahead = card->tsq.next + 1;
+
+		if (one_ahead == card->tsq.last)
+			two_ahead = card->tsq.base;
+		else
+			two_ahead = one_ahead + 1;
+	}
+
+	if (serviced_entries)
+		writel(PTR_DIFF(previous, card->tsq.base),
+		       card->membase + TSQH);
+}
+
+static void drain_scq(ns_dev * card, scq_info * scq, int pos)
+{
+	struct atm_vcc *vcc;
+	struct sk_buff *skb;
+	int i;
+	unsigned long flags;
+
+	XPRINTK("nicstar%d: drain_scq() called, scq at 0x%p, pos %d.\n",
+		card->index, scq, pos);
+	if (pos >= scq->num_entries) {
+		printk("nicstar%d: Bad index on drain_scq().\n", card->index);
+		return;
+	}
+
+	spin_lock_irqsave(&scq->lock, flags);
+	i = (int)(scq->tail - scq->base);
+	if (++i == scq->num_entries)
+		i = 0;
+	while (i != pos) {
+		skb = scq->skb[i];
+		XPRINTK("nicstar%d: freeing skb at 0x%p (index %d).\n",
+			card->index, skb, i);
+		if (skb != NULL) {
+			dma_unmap_single(&card->pcidev->dev,
+					 NS_PRV_DMA(skb),
+					 skb->len,
+					 DMA_TO_DEVICE);
+			vcc = ATM_SKB(skb)->vcc;
+			if (vcc && vcc->pop != NULL) {
+				vcc->pop(vcc, skb);
+			} else {
+				dev_kfree_skb_irq(skb);
+			}
+			scq->skb[i] = NULL;
+		}
+		if (++i == scq->num_entries)
+			i = 0;
+	}
+	scq->tail = scq->base + pos;
+	spin_unlock_irqrestore(&scq->lock, flags);
+}
+
+static void process_rsq(ns_dev * card)
+{
+	ns_rsqe *previous;
+
+	if (!ns_rsqe_valid(card->rsq.next))
+		return;
+	do {
+		dequeue_rx(card, card->rsq.next);
+		ns_rsqe_init(card->rsq.next);
+		previous = card->rsq.next;
+		if (card->rsq.next == card->rsq.last)
+			card->rsq.next = card->rsq.base;
+		else
+			card->rsq.next++;
+	} while (ns_rsqe_valid(card->rsq.next));
+	writel(PTR_DIFF(previous, card->rsq.base), card->membase + RSQH);
+}
+
+static void dequeue_rx(ns_dev * card, ns_rsqe * rsqe)
+{
+	u32 vpi, vci;
+	vc_map *vc;
+	struct sk_buff *iovb;
+	struct iovec *iov;
+	struct atm_vcc *vcc;
+	struct sk_buff *skb;
+	unsigned short aal5_len;
+	int len;
+	u32 stat;
+	u32 id;
+
+	stat = readl(card->membase + STAT);
+	card->sbfqc = ns_stat_sfbqc_get(stat);
+	card->lbfqc = ns_stat_lfbqc_get(stat);
+
+	id = le32_to_cpu(rsqe->buffer_handle);
+	skb = idr_find(&card->idr, id);
+	if (!skb) {
+		RXPRINTK(KERN_ERR
+			 "nicstar%d: idr_find() failed!\n", card->index);
+		return;
+	}
+	idr_remove(&card->idr, id);
+	dma_sync_single_for_cpu(&card->pcidev->dev,
+				NS_PRV_DMA(skb),
+				(NS_PRV_BUFTYPE(skb) == BUF_SM
+				 ? NS_SMSKBSIZE : NS_LGSKBSIZE),
+				DMA_FROM_DEVICE);
+	dma_unmap_single(&card->pcidev->dev,
+			 NS_PRV_DMA(skb),
+			 (NS_PRV_BUFTYPE(skb) == BUF_SM
+			  ? NS_SMSKBSIZE : NS_LGSKBSIZE),
+			 DMA_FROM_DEVICE);
+	vpi = ns_rsqe_vpi(rsqe);
+	vci = ns_rsqe_vci(rsqe);
+	if (vpi >= 1UL << card->vpibits || vci >= 1UL << card->vcibits) {
+		printk("nicstar%d: SDU received for out-of-range vc %d.%d.\n",
+		       card->index, vpi, vci);
+		recycle_rx_buf(card, skb);
+		return;
+	}
+
+	vc = &(card->vcmap[vpi << card->vcibits | vci]);
+	if (!vc->rx) {
+		RXPRINTK("nicstar%d: SDU received on non-rx vc %d.%d.\n",
+			 card->index, vpi, vci);
+		recycle_rx_buf(card, skb);
+		return;
+	}
+
+	vcc = vc->rx_vcc;
+
+	if (vcc->qos.aal == ATM_AAL0) {
+		struct sk_buff *sb;
+		unsigned char *cell;
+		int i;
+
+		cell = skb->data;
+		for (i = ns_rsqe_cellcount(rsqe); i; i--) {
+			if ((sb = dev_alloc_skb(NS_SMSKBSIZE)) == NULL) {
+				printk
+				    ("nicstar%d: Can't allocate buffers for aal0.\n",
+				     card->index);
+				atomic_add(i, &vcc->stats->rx_drop);
+				break;
+			}
+			if (!atm_charge(vcc, sb->truesize)) {
+				RXPRINTK
+				    ("nicstar%d: atm_charge() dropped aal0 packets.\n",
+				     card->index);
+				atomic_add(i - 1, &vcc->stats->rx_drop);	/* already increased by 1 */
+				dev_kfree_skb_any(sb);
+				break;
+			}
+			/* Rebuild the header */
+			*((u32 *) sb->data) = le32_to_cpu(rsqe->word_1) << 4 |
+			    (ns_rsqe_clp(rsqe) ? 0x00000001 : 0x00000000);
+			if (i == 1 && ns_rsqe_eopdu(rsqe))
+				*((u32 *) sb->data) |= 0x00000002;
+			skb_put(sb, NS_AAL0_HEADER);
+			memcpy(skb_tail_pointer(sb), cell, ATM_CELL_PAYLOAD);
+			skb_put(sb, ATM_CELL_PAYLOAD);
+			ATM_SKB(sb)->vcc = vcc;
+			__net_timestamp(sb);
+			vcc->push(vcc, sb);
+			atomic_inc(&vcc->stats->rx);
+			cell += ATM_CELL_PAYLOAD;
+		}
+
+		recycle_rx_buf(card, skb);
+		return;
+	}
+
+	/* To reach this point, the AAL layer can only be AAL5 */
+
+	if ((iovb = vc->rx_iov) == NULL) {
+		iovb = skb_dequeue(&(card->iovpool.queue));
+		if (iovb == NULL) {	/* No buffers in the queue */
+			iovb = alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC);
+			if (iovb == NULL) {
+				printk("nicstar%d: Out of iovec buffers.\n",
+				       card->index);
+				atomic_inc(&vcc->stats->rx_drop);
+				recycle_rx_buf(card, skb);
+				return;
+			}
+			NS_PRV_BUFTYPE(iovb) = BUF_NONE;
+		} else if (--card->iovpool.count < card->iovnr.min) {
+			struct sk_buff *new_iovb;
+			if ((new_iovb =
+			     alloc_skb(NS_IOVBUFSIZE, GFP_ATOMIC)) != NULL) {
+				NS_PRV_BUFTYPE(iovb) = BUF_NONE;
+				skb_queue_tail(&card->iovpool.queue, new_iovb);
+				card->iovpool.count++;
+			}
+		}
+		vc->rx_iov = iovb;
+		NS_PRV_IOVCNT(iovb) = 0;
+		iovb->len = 0;
+		iovb->data = iovb->head;
+		skb_reset_tail_pointer(iovb);
+		/* IMPORTANT: a pointer to the sk_buff containing the small or large
+		   buffer is stored as iovec base, NOT a pointer to the
+		   small or large buffer itself. */
+	} else if (NS_PRV_IOVCNT(iovb) >= NS_MAX_IOVECS) {
+		printk("nicstar%d: received too big AAL5 SDU.\n", card->index);
+		atomic_inc(&vcc->stats->rx_err);
+		recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+				      NS_MAX_IOVECS);
+		NS_PRV_IOVCNT(iovb) = 0;
+		iovb->len = 0;
+		iovb->data = iovb->head;
+		skb_reset_tail_pointer(iovb);
+	}
+	iov = &((struct iovec *)iovb->data)[NS_PRV_IOVCNT(iovb)++];
+	iov->iov_base = (void *)skb;
+	iov->iov_len = ns_rsqe_cellcount(rsqe) * 48;
+	iovb->len += iov->iov_len;
+
+#ifdef EXTRA_DEBUG
+	if (NS_PRV_IOVCNT(iovb) == 1) {
+		if (NS_PRV_BUFTYPE(skb) != BUF_SM) {
+			printk
+			    ("nicstar%d: Expected a small buffer, and this is not one.\n",
+			     card->index);
+			which_list(card, skb);
+			atomic_inc(&vcc->stats->rx_err);
+			recycle_rx_buf(card, skb);
+			vc->rx_iov = NULL;
+			recycle_iov_buf(card, iovb);
+			return;
+		}
+	} else {		/* NS_PRV_IOVCNT(iovb) >= 2 */
+
+		if (NS_PRV_BUFTYPE(skb) != BUF_LG) {
+			printk
+			    ("nicstar%d: Expected a large buffer, and this is not one.\n",
+			     card->index);
+			which_list(card, skb);
+			atomic_inc(&vcc->stats->rx_err);
+			recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+					      NS_PRV_IOVCNT(iovb));
+			vc->rx_iov = NULL;
+			recycle_iov_buf(card, iovb);
+			return;
+		}
+	}
+#endif /* EXTRA_DEBUG */
+
+	if (ns_rsqe_eopdu(rsqe)) {
+		/* This works correctly regardless of the endianness of the host */
+		unsigned char *L1L2 = (unsigned char *)
+						(skb->data + iov->iov_len - 6);
+		aal5_len = L1L2[0] << 8 | L1L2[1];
+		len = (aal5_len == 0x0000) ? 0x10000 : aal5_len;
+		if (ns_rsqe_crcerr(rsqe) ||
+		    len + 8 > iovb->len || len + (47 + 8) < iovb->len) {
+			printk("nicstar%d: AAL5 CRC error", card->index);
+			if (len + 8 > iovb->len || len + (47 + 8) < iovb->len)
+				printk(" - PDU size mismatch.\n");
+			else
+				printk(".\n");
+			atomic_inc(&vcc->stats->rx_err);
+			recycle_iovec_rx_bufs(card, (struct iovec *)iovb->data,
+					      NS_PRV_IOVCNT(iovb));
+			vc->rx_iov = NULL;
+			recycle_iov_buf(card, iovb);
+			return;
+		}
+
+		/* By this point we (hopefully) have a complete SDU without errors. */
+
+		if (NS_PRV_IOVCNT(iovb) == 1) {	/* Just a small buffer */
+			/* skb points to a small buffer */
+			if (!atm_charge(vcc, skb->truesize)) {
+				push_rxbufs(card, skb);
+				atomic_inc(&vcc->stats->rx_drop);
+			} else {
+				skb_put(skb, len);
+				dequeue_sm_buf(card, skb);
+				ATM_SKB(skb)->vcc = vcc;
+				__net_timestamp(skb);
+				vcc->push(vcc, skb);
+				atomic_inc(&vcc->stats->rx);
+			}
+		} else if (NS_PRV_IOVCNT(iovb) == 2) {	/* One small plus one large buffer */
+			struct sk_buff *sb;
+
+			sb = (struct sk_buff *)(iov - 1)->iov_base;
+			/* skb points to a large buffer */
+
+			if (len <= NS_SMBUFSIZE) {
+				if (!atm_charge(vcc, sb->truesize)) {
+					push_rxbufs(card, sb);
+					atomic_inc(&vcc->stats->rx_drop);
+				} else {
+					skb_put(sb, len);
+					dequeue_sm_buf(card, sb);
+					ATM_SKB(sb)->vcc = vcc;
+					__net_timestamp(sb);
+					vcc->push(vcc, sb);
+					atomic_inc(&vcc->stats->rx);
+				}
+
+				push_rxbufs(card, skb);
+
+			} else {	/* len > NS_SMBUFSIZE, the usual case */
+
+				if (!atm_charge(vcc, skb->truesize)) {
+					push_rxbufs(card, skb);
+					atomic_inc(&vcc->stats->rx_drop);
+				} else {
+					dequeue_lg_buf(card, skb);
+					skb_push(skb, NS_SMBUFSIZE);
+					skb_copy_from_linear_data(sb, skb->data,
+								  NS_SMBUFSIZE);
+					skb_put(skb, len - NS_SMBUFSIZE);
+					ATM_SKB(skb)->vcc = vcc;
+					__net_timestamp(skb);
+					vcc->push(vcc, skb);
+					atomic_inc(&vcc->stats->rx);
+				}
+
+				push_rxbufs(card, sb);
+
+			}
+
+		} else {	/* Must push a huge buffer */
+
+			struct sk_buff *hb, *sb, *lb;
+			int remaining, tocopy;
+			int j;
+
+			hb = skb_dequeue(&(card->hbpool.queue));
+			if (hb == NULL) {	/* No buffers in the queue */
+
+				hb = dev_alloc_skb(NS_HBUFSIZE);
+				if (hb == NULL) {
+					printk
+					    ("nicstar%d: Out of huge buffers.\n",
+					     card->index);
+					atomic_inc(&vcc->stats->rx_drop);
+					recycle_iovec_rx_bufs(card,
+							      (struct iovec *)
+							      iovb->data,
+							      NS_PRV_IOVCNT(iovb));
+					vc->rx_iov = NULL;
+					recycle_iov_buf(card, iovb);
+					return;
+				} else if (card->hbpool.count < card->hbnr.min) {
+					struct sk_buff *new_hb;
+					if ((new_hb =
+					     dev_alloc_skb(NS_HBUFSIZE)) !=
+					    NULL) {
+						skb_queue_tail(&card->hbpool.
+							       queue, new_hb);
+						card->hbpool.count++;
+					}
+				}
+				NS_PRV_BUFTYPE(hb) = BUF_NONE;
+			} else if (--card->hbpool.count < card->hbnr.min) {
+				struct sk_buff *new_hb;
+				if ((new_hb =
+				     dev_alloc_skb(NS_HBUFSIZE)) != NULL) {
+					NS_PRV_BUFTYPE(new_hb) = BUF_NONE;
+					skb_queue_tail(&card->hbpool.queue,
+						       new_hb);
+					card->hbpool.count++;
+				}
+				if (card->hbpool.count < card->hbnr.min) {
+					if ((new_hb =
+					     dev_alloc_skb(NS_HBUFSIZE)) !=
+					    NULL) {
+						NS_PRV_BUFTYPE(new_hb) =
+						    BUF_NONE;
+						skb_queue_tail(&card->hbpool.
+							       queue, new_hb);
+						card->hbpool.count++;
+					}
+				}
+			}
+
+			iov = (struct iovec *)iovb->data;
+
+			if (!atm_charge(vcc, hb->truesize)) {
+				recycle_iovec_rx_bufs(card, iov,
+						      NS_PRV_IOVCNT(iovb));
+				if (card->hbpool.count < card->hbnr.max) {
+					skb_queue_tail(&card->hbpool.queue, hb);
+					card->hbpool.count++;
+				} else
+					dev_kfree_skb_any(hb);
+				atomic_inc(&vcc->stats->rx_drop);
+			} else {
+				/* Copy the small buffer to the huge buffer */
+				sb = (struct sk_buff *)iov->iov_base;
+				skb_copy_from_linear_data(sb, hb->data,
+							  iov->iov_len);
+				skb_put(hb, iov->iov_len);
+				remaining = len - iov->iov_len;
+				iov++;
+				/* Free the small buffer */
+				push_rxbufs(card, sb);
+
+				/* Copy all large buffers to the huge buffer and free them */
+				for (j = 1; j < NS_PRV_IOVCNT(iovb); j++) {
+					lb = (struct sk_buff *)iov->iov_base;
+					tocopy =
+					    min_t(int, remaining, iov->iov_len);
+					skb_copy_from_linear_data(lb,
+								  skb_tail_pointer
+								  (hb), tocopy);
+					skb_put(hb, tocopy);
+					iov++;
+					remaining -= tocopy;
+					push_rxbufs(card, lb);
+				}
+#ifdef EXTRA_DEBUG
+				if (remaining != 0 || hb->len != len)
+					printk
+					    ("nicstar%d: Huge buffer len mismatch.\n",
+					     card->index);
+#endif /* EXTRA_DEBUG */
+				ATM_SKB(hb)->vcc = vcc;
+				__net_timestamp(hb);
+				vcc->push(vcc, hb);
+				atomic_inc(&vcc->stats->rx);
+			}
+		}
+
+		vc->rx_iov = NULL;
+		recycle_iov_buf(card, iovb);
+	}
+
+}
+
+static void recycle_rx_buf(ns_dev * card, struct sk_buff *skb)
+{
+	if (unlikely(NS_PRV_BUFTYPE(skb) == BUF_NONE)) {
+		printk("nicstar%d: What kind of rx buffer is this?\n",
+		       card->index);
+		dev_kfree_skb_any(skb);
+	} else
+		push_rxbufs(card, skb);
+}
+
+static void recycle_iovec_rx_bufs(ns_dev * card, struct iovec *iov, int count)
+{
+	while (count-- > 0)
+		recycle_rx_buf(card, (struct sk_buff *)(iov++)->iov_base);
+}
+
+static void recycle_iov_buf(ns_dev * card, struct sk_buff *iovb)
+{
+	if (card->iovpool.count < card->iovnr.max) {
+		skb_queue_tail(&card->iovpool.queue, iovb);
+		card->iovpool.count++;
+	} else
+		dev_kfree_skb_any(iovb);
+}
+
+static void dequeue_sm_buf(ns_dev * card, struct sk_buff *sb)
+{
+	skb_unlink(sb, &card->sbpool.queue);
+	if (card->sbfqc < card->sbnr.init) {
+		struct sk_buff *new_sb;
+		if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
+			NS_PRV_BUFTYPE(new_sb) = BUF_SM;
+			skb_queue_tail(&card->sbpool.queue, new_sb);
+			skb_reserve(new_sb, NS_AAL0_HEADER);
+			push_rxbufs(card, new_sb);
+		}
+	}
+	if (card->sbfqc < card->sbnr.init)
+	{
+		struct sk_buff *new_sb;
+		if ((new_sb = dev_alloc_skb(NS_SMSKBSIZE)) != NULL) {
+			NS_PRV_BUFTYPE(new_sb) = BUF_SM;
+			skb_queue_tail(&card->sbpool.queue, new_sb);
+			skb_reserve(new_sb, NS_AAL0_HEADER);
+			push_rxbufs(card, new_sb);
+		}
+	}
+}
+
+static void dequeue_lg_buf(ns_dev * card, struct sk_buff *lb)
+{
+	skb_unlink(lb, &card->lbpool.queue);
+	if (card->lbfqc < card->lbnr.init) {
+		struct sk_buff *new_lb;
+		if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
+			NS_PRV_BUFTYPE(new_lb) = BUF_LG;
+			skb_queue_tail(&card->lbpool.queue, new_lb);
+			skb_reserve(new_lb, NS_SMBUFSIZE);
+			push_rxbufs(card, new_lb);
+		}
+	}
+	if (card->lbfqc < card->lbnr.init)
+	{
+		struct sk_buff *new_lb;
+		if ((new_lb = dev_alloc_skb(NS_LGSKBSIZE)) != NULL) {
+			NS_PRV_BUFTYPE(new_lb) = BUF_LG;
+			skb_queue_tail(&card->lbpool.queue, new_lb);
+			skb_reserve(new_lb, NS_SMBUFSIZE);
+			push_rxbufs(card, new_lb);
+		}
+	}
+}
+
+static int ns_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
+{
+	u32 stat;
+	ns_dev *card;
+	int left;
+
+	left = (int)*pos;
+	card = (ns_dev *) dev->dev_data;
+	stat = readl(card->membase + STAT);
+	if (!left--)
+		return sprintf(page, "Pool   count    min   init    max \n");
+	if (!left--)
+		return sprintf(page, "Small  %5d  %5d  %5d  %5d \n",
+			       ns_stat_sfbqc_get(stat), card->sbnr.min,
+			       card->sbnr.init, card->sbnr.max);
+	if (!left--)
+		return sprintf(page, "Large  %5d  %5d  %5d  %5d \n",
+			       ns_stat_lfbqc_get(stat), card->lbnr.min,
+			       card->lbnr.init, card->lbnr.max);
+	if (!left--)
+		return sprintf(page, "Huge   %5d  %5d  %5d  %5d \n",
+			       card->hbpool.count, card->hbnr.min,
+			       card->hbnr.init, card->hbnr.max);
+	if (!left--)
+		return sprintf(page, "Iovec  %5d  %5d  %5d  %5d \n",
+			       card->iovpool.count, card->iovnr.min,
+			       card->iovnr.init, card->iovnr.max);
+	if (!left--) {
+		int retval;
+		retval =
+		    sprintf(page, "Interrupt counter: %u \n", card->intcnt);
+		card->intcnt = 0;
+		return retval;
+	}
+#if 0
+	/* Dump 25.6 Mbps PHY registers */
+	/* Now there's a 25.6 Mbps PHY driver this code isn't needed. I left it
+	   here just in case it's needed for debugging. */
+	if (card->max_pcr == ATM_25_PCR && !left--) {
+		u32 phy_regs[4];
+		u32 i;
+
+		for (i = 0; i < 4; i++) {
+			while (CMD_BUSY(card)) ;
+			writel(NS_CMD_READ_UTILITY | 0x00000200 | i,
+			       card->membase + CMD);
+			while (CMD_BUSY(card)) ;
+			phy_regs[i] = readl(card->membase + DR0) & 0x000000FF;
+		}
+
+		return sprintf(page, "PHY regs: 0x%02X 0x%02X 0x%02X 0x%02X \n",
+			       phy_regs[0], phy_regs[1], phy_regs[2],
+			       phy_regs[3]);
+	}
+#endif /* 0 - Dump 25.6 Mbps PHY registers */
+#if 0
+	/* Dump TST */
+	if (left-- < NS_TST_NUM_ENTRIES) {
+		if (card->tste2vc[left + 1] == NULL)
+			return sprintf(page, "%5d - VBR/UBR \n", left + 1);
+		else
+			return sprintf(page, "%5d - %d %d \n", left + 1,
+				       card->tste2vc[left + 1]->tx_vcc->vpi,
+				       card->tste2vc[left + 1]->tx_vcc->vci);
+	}
+#endif /* 0 */
+	return 0;
+}
+
+static int ns_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg)
+{
+	ns_dev *card;
+	pool_levels pl;
+	long btype;
+	unsigned long flags;
+
+	card = dev->dev_data;
+	switch (cmd) {
+	case NS_GETPSTAT:
+		if (get_user
+		    (pl.buftype, &((pool_levels __user *) arg)->buftype))
+			return -EFAULT;
+		switch (pl.buftype) {
+		case NS_BUFTYPE_SMALL:
+			pl.count =
+			    ns_stat_sfbqc_get(readl(card->membase + STAT));
+			pl.level.min = card->sbnr.min;
+			pl.level.init = card->sbnr.init;
+			pl.level.max = card->sbnr.max;
+			break;
+
+		case NS_BUFTYPE_LARGE:
+			pl.count =
+			    ns_stat_lfbqc_get(readl(card->membase + STAT));
+			pl.level.min = card->lbnr.min;
+			pl.level.init = card->lbnr.init;
+			pl.level.max = card->lbnr.max;
+			break;
+
+		case NS_BUFTYPE_HUGE:
+			pl.count = card->hbpool.count;
+			pl.level.min = card->hbnr.min;
+			pl.level.init = card->hbnr.init;
+			pl.level.max = card->hbnr.max;
+			break;
+
+		case NS_BUFTYPE_IOVEC:
+			pl.count = card->iovpool.count;
+			pl.level.min = card->iovnr.min;
+			pl.level.init = card->iovnr.init;
+			pl.level.max = card->iovnr.max;
+			break;
+
+		default:
+			return -ENOIOCTLCMD;
+
+		}
+		if (!copy_to_user((pool_levels __user *) arg, &pl, sizeof(pl)))
+			return (sizeof(pl));
+		else
+			return -EFAULT;
+
+	case NS_SETBUFLEV:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (copy_from_user(&pl, (pool_levels __user *) arg, sizeof(pl)))
+			return -EFAULT;
+		if (pl.level.min >= pl.level.init
+		    || pl.level.init >= pl.level.max)
+			return -EINVAL;
+		if (pl.level.min == 0)
+			return -EINVAL;
+		switch (pl.buftype) {
+		case NS_BUFTYPE_SMALL:
+			if (pl.level.max > TOP_SB)
+				return -EINVAL;
+			card->sbnr.min = pl.level.min;
+			card->sbnr.init = pl.level.init;
+			card->sbnr.max = pl.level.max;
+			break;
+
+		case NS_BUFTYPE_LARGE:
+			if (pl.level.max > TOP_LB)
+				return -EINVAL;
+			card->lbnr.min = pl.level.min;
+			card->lbnr.init = pl.level.init;
+			card->lbnr.max = pl.level.max;
+			break;
+
+		case NS_BUFTYPE_HUGE:
+			if (pl.level.max > TOP_HB)
+				return -EINVAL;
+			card->hbnr.min = pl.level.min;
+			card->hbnr.init = pl.level.init;
+			card->hbnr.max = pl.level.max;
+			break;
+
+		case NS_BUFTYPE_IOVEC:
+			if (pl.level.max > TOP_IOVB)
+				return -EINVAL;
+			card->iovnr.min = pl.level.min;
+			card->iovnr.init = pl.level.init;
+			card->iovnr.max = pl.level.max;
+			break;
+
+		default:
+			return -EINVAL;
+
+		}
+		return 0;
+
+	case NS_ADJBUFLEV:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		btype = (long)arg;	/* a long is the same size as a pointer or bigger */
+		switch (btype) {
+		case NS_BUFTYPE_SMALL:
+			while (card->sbfqc < card->sbnr.init) {
+				struct sk_buff *sb;
+
+				sb = __dev_alloc_skb(NS_SMSKBSIZE, GFP_KERNEL);
+				if (sb == NULL)
+					return -ENOMEM;
+				NS_PRV_BUFTYPE(sb) = BUF_SM;
+				skb_queue_tail(&card->sbpool.queue, sb);
+				skb_reserve(sb, NS_AAL0_HEADER);
+				push_rxbufs(card, sb);
+			}
+			break;
+
+		case NS_BUFTYPE_LARGE:
+			while (card->lbfqc < card->lbnr.init) {
+				struct sk_buff *lb;
+
+				lb = __dev_alloc_skb(NS_LGSKBSIZE, GFP_KERNEL);
+				if (lb == NULL)
+					return -ENOMEM;
+				NS_PRV_BUFTYPE(lb) = BUF_LG;
+				skb_queue_tail(&card->lbpool.queue, lb);
+				skb_reserve(lb, NS_SMBUFSIZE);
+				push_rxbufs(card, lb);
+			}
+			break;
+
+		case NS_BUFTYPE_HUGE:
+			while (card->hbpool.count > card->hbnr.init) {
+				struct sk_buff *hb;
+
+				spin_lock_irqsave(&card->int_lock, flags);
+				hb = skb_dequeue(&card->hbpool.queue);
+				card->hbpool.count--;
+				spin_unlock_irqrestore(&card->int_lock, flags);
+				if (hb == NULL)
+					printk
+					    ("nicstar%d: huge buffer count inconsistent.\n",
+					     card->index);
+				else
+					dev_kfree_skb_any(hb);
+
+			}
+			while (card->hbpool.count < card->hbnr.init) {
+				struct sk_buff *hb;
+
+				hb = __dev_alloc_skb(NS_HBUFSIZE, GFP_KERNEL);
+				if (hb == NULL)
+					return -ENOMEM;
+				NS_PRV_BUFTYPE(hb) = BUF_NONE;
+				spin_lock_irqsave(&card->int_lock, flags);
+				skb_queue_tail(&card->hbpool.queue, hb);
+				card->hbpool.count++;
+				spin_unlock_irqrestore(&card->int_lock, flags);
+			}
+			break;
+
+		case NS_BUFTYPE_IOVEC:
+			while (card->iovpool.count > card->iovnr.init) {
+				struct sk_buff *iovb;
+
+				spin_lock_irqsave(&card->int_lock, flags);
+				iovb = skb_dequeue(&card->iovpool.queue);
+				card->iovpool.count--;
+				spin_unlock_irqrestore(&card->int_lock, flags);
+				if (iovb == NULL)
+					printk
+					    ("nicstar%d: iovec buffer count inconsistent.\n",
+					     card->index);
+				else
+					dev_kfree_skb_any(iovb);
+
+			}
+			while (card->iovpool.count < card->iovnr.init) {
+				struct sk_buff *iovb;
+
+				iovb = alloc_skb(NS_IOVBUFSIZE, GFP_KERNEL);
+				if (iovb == NULL)
+					return -ENOMEM;
+				NS_PRV_BUFTYPE(iovb) = BUF_NONE;
+				spin_lock_irqsave(&card->int_lock, flags);
+				skb_queue_tail(&card->iovpool.queue, iovb);
+				card->iovpool.count++;
+				spin_unlock_irqrestore(&card->int_lock, flags);
+			}
+			break;
+
+		default:
+			return -EINVAL;
+
+		}
+		return 0;
+
+	default:
+		if (dev->phy && dev->phy->ioctl) {
+			return dev->phy->ioctl(dev, cmd, arg);
+		} else {
+			printk("nicstar%d: %s == NULL \n", card->index,
+			       dev->phy ? "dev->phy->ioctl" : "dev->phy");
+			return -ENOIOCTLCMD;
+		}
+	}
+}
+
+#ifdef EXTRA_DEBUG
+static void which_list(ns_dev * card, struct sk_buff *skb)
+{
+	printk("skb buf_type: 0x%08x\n", NS_PRV_BUFTYPE(skb));
+}
+#endif /* EXTRA_DEBUG */
+
+static void ns_poll(unsigned long arg)
+{
+	int i;
+	ns_dev *card;
+	unsigned long flags;
+	u32 stat_r, stat_w;
+
+	PRINTK("nicstar: Entering ns_poll().\n");
+	for (i = 0; i < num_cards; i++) {
+		card = cards[i];
+		if (spin_is_locked(&card->int_lock)) {
+			/* Probably it isn't worth spinning */
+			continue;
+		}
+		spin_lock_irqsave(&card->int_lock, flags);
+
+		stat_w = 0;
+		stat_r = readl(card->membase + STAT);
+		if (stat_r & NS_STAT_TSIF)
+			stat_w |= NS_STAT_TSIF;
+		if (stat_r & NS_STAT_EOPDU)
+			stat_w |= NS_STAT_EOPDU;
+
+		process_tsq(card);
+		process_rsq(card);
+
+		writel(stat_w, card->membase + STAT);
+		spin_unlock_irqrestore(&card->int_lock, flags);
+	}
+	mod_timer(&ns_timer, jiffies + NS_POLL_PERIOD);
+	PRINTK("nicstar: Leaving ns_poll().\n");
+}
+
+static void ns_phy_put(struct atm_dev *dev, unsigned char value,
+		       unsigned long addr)
+{
+	ns_dev *card;
+	unsigned long flags;
+
+	card = dev->dev_data;
+	spin_lock_irqsave(&card->res_lock, flags);
+	while (CMD_BUSY(card)) ;
+	writel((u32) value, card->membase + DR0);
+	writel(NS_CMD_WRITE_UTILITY | 0x00000200 | (addr & 0x000000FF),
+	       card->membase + CMD);
+	spin_unlock_irqrestore(&card->res_lock, flags);
+}
+
+static unsigned char ns_phy_get(struct atm_dev *dev, unsigned long addr)
+{
+	ns_dev *card;
+	unsigned long flags;
+	u32 data;
+
+	card = dev->dev_data;
+	spin_lock_irqsave(&card->res_lock, flags);
+	while (CMD_BUSY(card)) ;
+	writel(NS_CMD_READ_UTILITY | 0x00000200 | (addr & 0x000000FF),
+	       card->membase + CMD);
+	while (CMD_BUSY(card)) ;
+	data = readl(card->membase + DR0) & 0x000000FF;
+	spin_unlock_irqrestore(&card->res_lock, flags);
+	return (unsigned char)data;
+}
+
+module_init(nicstar_init);
+module_exit(nicstar_cleanup);