Linux-2.6.12-rc2

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

Let it rip!

1 files changed, 1043 insertions, 0 deletions

diff --git a/drivers/net/sunqe.c b/drivers/net/sunqe.c
new file mode 100644
index 00000000000..37ef1b82a6c
--- /dev/null
+++ b/drivers/net/sunqe.c
@@ -0,0 +1,1043 @@
+/* $Id: sunqe.c,v 1.55 2002/01/15 06:48:55 davem Exp $
+ * sunqe.c: Sparc QuadEthernet 10baseT SBUS card driver.
+ *          Once again I am out to prove that every ethernet
+ *          controller out there can be most efficiently programmed
+ *          if you make it look like a LANCE.
+ *
+ * Copyright (C) 1996, 1999, 2003 David S. Miller (davem@redhat.com)
+ */
+
+static char version[] =
+        "sunqe.c:v3.0 8/24/03 David S. Miller (davem@redhat.com)\n";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+#include <asm/idprom.h>
+#include <asm/sbus.h>
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/auxio.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+
+#include "sunqe.h"
+
+static struct sunqec *root_qec_dev;
+
+static void qe_set_multicast(struct net_device *dev);
+
+#define QEC_RESET_TRIES 200
+
+static inline int qec_global_reset(void __iomem *gregs)
+{
+	int tries = QEC_RESET_TRIES;
+
+	sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
+	while (--tries) {
+		u32 tmp = sbus_readl(gregs + GLOB_CTRL);
+		if (tmp & GLOB_CTRL_RESET) {
+			udelay(20);
+			continue;
+		}
+		break;
+	}
+	if (tries)
+		return 0;
+	printk(KERN_ERR "QuadEther: AIEEE cannot reset the QEC!\n");
+	return -1;
+}
+
+#define MACE_RESET_RETRIES 200
+#define QE_RESET_RETRIES   200
+
+static inline int qe_stop(struct sunqe *qep)
+{
+	void __iomem *cregs = qep->qcregs;
+	void __iomem *mregs = qep->mregs;
+	int tries;
+
+	/* Reset the MACE, then the QEC channel. */
+	sbus_writeb(MREGS_BCONFIG_RESET, mregs + MREGS_BCONFIG);
+	tries = MACE_RESET_RETRIES;
+	while (--tries) {
+		u8 tmp = sbus_readb(mregs + MREGS_BCONFIG);
+		if (tmp & MREGS_BCONFIG_RESET) {
+			udelay(20);
+			continue;
+		}
+		break;
+	}
+	if (!tries) {
+		printk(KERN_ERR "QuadEther: AIEEE cannot reset the MACE!\n");
+		return -1;
+	}
+
+	sbus_writel(CREG_CTRL_RESET, cregs + CREG_CTRL);
+	tries = QE_RESET_RETRIES;
+	while (--tries) {
+		u32 tmp = sbus_readl(cregs + CREG_CTRL);
+		if (tmp & CREG_CTRL_RESET) {
+			udelay(20);
+			continue;
+		}
+		break;
+	}
+	if (!tries) {
+		printk(KERN_ERR "QuadEther: Cannot reset QE channel!\n");
+		return -1;
+	}
+	return 0;
+}
+
+static void qe_init_rings(struct sunqe *qep)
+{
+	struct qe_init_block *qb = qep->qe_block;
+	struct sunqe_buffers *qbufs = qep->buffers;
+	__u32 qbufs_dvma = qep->buffers_dvma;
+	int i;
+
+	qep->rx_new = qep->rx_old = qep->tx_new = qep->tx_old = 0;
+	memset(qb, 0, sizeof(struct qe_init_block));
+	memset(qbufs, 0, sizeof(struct sunqe_buffers));
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		qb->qe_rxd[i].rx_addr = qbufs_dvma + qebuf_offset(rx_buf, i);
+		qb->qe_rxd[i].rx_flags =
+			(RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
+	}
+}
+
+static int qe_init(struct sunqe *qep, int from_irq)
+{
+	struct sunqec *qecp = qep->parent;
+	void __iomem *cregs = qep->qcregs;
+	void __iomem *mregs = qep->mregs;
+	void __iomem *gregs = qecp->gregs;
+	unsigned char *e = &qep->dev->dev_addr[0];
+	u32 tmp;
+	int i;
+
+	/* Shut it up. */
+	if (qe_stop(qep))
+		return -EAGAIN;
+
+	/* Setup initial rx/tx init block pointers. */
+	sbus_writel(qep->qblock_dvma + qib_offset(qe_rxd, 0), cregs + CREG_RXDS);
+	sbus_writel(qep->qblock_dvma + qib_offset(qe_txd, 0), cregs + CREG_TXDS);
+
+	/* Enable/mask the various irq's. */
+	sbus_writel(0, cregs + CREG_RIMASK);
+	sbus_writel(1, cregs + CREG_TIMASK);
+
+	sbus_writel(0, cregs + CREG_QMASK);
+	sbus_writel(CREG_MMASK_RXCOLL, cregs + CREG_MMASK);
+
+	/* Setup the FIFO pointers into QEC local memory. */
+	tmp = qep->channel * sbus_readl(gregs + GLOB_MSIZE);
+	sbus_writel(tmp, cregs + CREG_RXRBUFPTR);
+	sbus_writel(tmp, cregs + CREG_RXWBUFPTR);
+
+	tmp = sbus_readl(cregs + CREG_RXRBUFPTR) +
+		sbus_readl(gregs + GLOB_RSIZE);
+	sbus_writel(tmp, cregs + CREG_TXRBUFPTR);
+	sbus_writel(tmp, cregs + CREG_TXWBUFPTR);
+
+	/* Clear the channel collision counter. */
+	sbus_writel(0, cregs + CREG_CCNT);
+
+	/* For 10baseT, inter frame space nor throttle seems to be necessary. */
+	sbus_writel(0, cregs + CREG_PIPG);
+
+	/* Now dork with the AMD MACE. */
+	sbus_writeb(MREGS_PHYCONFIG_AUTO, mregs + MREGS_PHYCONFIG);
+	sbus_writeb(MREGS_TXFCNTL_AUTOPAD, mregs + MREGS_TXFCNTL);
+	sbus_writeb(0, mregs + MREGS_RXFCNTL);
+
+	/* The QEC dma's the rx'd packets from local memory out to main memory,
+	 * and therefore it interrupts when the packet reception is "complete".
+	 * So don't listen for the MACE talking about it.
+	 */
+	sbus_writeb(MREGS_IMASK_COLL | MREGS_IMASK_RXIRQ, mregs + MREGS_IMASK);
+	sbus_writeb(MREGS_BCONFIG_BSWAP | MREGS_BCONFIG_64TS, mregs + MREGS_BCONFIG);
+	sbus_writeb((MREGS_FCONFIG_TXF16 | MREGS_FCONFIG_RXF32 |
+		     MREGS_FCONFIG_RFWU | MREGS_FCONFIG_TFWU),
+		    mregs + MREGS_FCONFIG);
+
+	/* Only usable interface on QuadEther is twisted pair. */
+	sbus_writeb(MREGS_PLSCONFIG_TP, mregs + MREGS_PLSCONFIG);
+
+	/* Tell MACE we are changing the ether address. */
+	sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_PARESET,
+		    mregs + MREGS_IACONFIG);
+	while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
+		barrier();
+	sbus_writeb(e[0], mregs + MREGS_ETHADDR);
+	sbus_writeb(e[1], mregs + MREGS_ETHADDR);
+	sbus_writeb(e[2], mregs + MREGS_ETHADDR);
+	sbus_writeb(e[3], mregs + MREGS_ETHADDR);
+	sbus_writeb(e[4], mregs + MREGS_ETHADDR);
+	sbus_writeb(e[5], mregs + MREGS_ETHADDR);
+
+	/* Clear out the address filter. */
+	sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
+		    mregs + MREGS_IACONFIG);
+	while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
+		barrier();
+	for (i = 0; i < 8; i++)
+		sbus_writeb(0, mregs + MREGS_FILTER);
+
+	/* Address changes are now complete. */
+	sbus_writeb(0, mregs + MREGS_IACONFIG);
+
+	qe_init_rings(qep);
+
+	/* Wait a little bit for the link to come up... */
+	mdelay(5);
+	if (!(sbus_readb(mregs + MREGS_PHYCONFIG) & MREGS_PHYCONFIG_LTESTDIS)) {
+		int tries = 50;
+
+		while (tries--) {
+			u8 tmp;
+
+			mdelay(5);
+			barrier();
+			tmp = sbus_readb(mregs + MREGS_PHYCONFIG);
+			if ((tmp & MREGS_PHYCONFIG_LSTAT) != 0)
+				break;
+		}
+		if (tries == 0)
+			printk(KERN_NOTICE "%s: Warning, link state is down.\n", qep->dev->name);
+	}
+
+	/* Missed packet counter is cleared on a read. */
+	sbus_readb(mregs + MREGS_MPCNT);
+
+	/* Reload multicast information, this will enable the receiver
+	 * and transmitter.
+	 */
+	qe_set_multicast(qep->dev);
+
+	/* QEC should now start to show interrupts. */
+	return 0;
+}
+
+/* Grrr, certain error conditions completely lock up the AMD MACE,
+ * so when we get these we _must_ reset the chip.
+ */
+static int qe_is_bolixed(struct sunqe *qep, u32 qe_status)
+{
+	struct net_device *dev = qep->dev;
+	int mace_hwbug_workaround = 0;
+
+	if (qe_status & CREG_STAT_EDEFER) {
+		printk(KERN_ERR "%s: Excessive transmit defers.\n", dev->name);
+		qep->net_stats.tx_errors++;
+	}
+
+	if (qe_status & CREG_STAT_CLOSS) {
+		printk(KERN_ERR "%s: Carrier lost, link down?\n", dev->name);
+		qep->net_stats.tx_errors++;
+		qep->net_stats.tx_carrier_errors++;
+	}
+
+	if (qe_status & CREG_STAT_ERETRIES) {
+		printk(KERN_ERR "%s: Excessive transmit retries (more than 16).\n", dev->name);
+		qep->net_stats.tx_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_LCOLL) {
+		printk(KERN_ERR "%s: Late transmit collision.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		qep->net_stats.collisions++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_FUFLOW) {
+		printk(KERN_ERR "%s: Transmit fifo underflow, driver bug.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_JERROR) {
+		printk(KERN_ERR "%s: Jabber error.\n", dev->name);
+	}
+
+	if (qe_status & CREG_STAT_BERROR) {
+		printk(KERN_ERR "%s: Babble error.\n", dev->name);
+	}
+
+	if (qe_status & CREG_STAT_CCOFLOW) {
+		qep->net_stats.tx_errors += 256;
+		qep->net_stats.collisions += 256;
+	}
+
+	if (qe_status & CREG_STAT_TXDERROR) {
+		printk(KERN_ERR "%s: Transmit descriptor is bogus, driver bug.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		qep->net_stats.tx_aborted_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_TXLERR) {
+		printk(KERN_ERR "%s: Transmit late error.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_TXPERR) {
+		printk(KERN_ERR "%s: Transmit DMA parity error.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		qep->net_stats.tx_aborted_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_TXSERR) {
+		printk(KERN_ERR "%s: Transmit DMA sbus error ack.\n", dev->name);
+		qep->net_stats.tx_errors++;
+		qep->net_stats.tx_aborted_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_RCCOFLOW) {
+		qep->net_stats.rx_errors += 256;
+		qep->net_stats.collisions += 256;
+	}
+
+	if (qe_status & CREG_STAT_RUOFLOW) {
+		qep->net_stats.rx_errors += 256;
+		qep->net_stats.rx_over_errors += 256;
+	}
+
+	if (qe_status & CREG_STAT_MCOFLOW) {
+		qep->net_stats.rx_errors += 256;
+		qep->net_stats.rx_missed_errors += 256;
+	}
+
+	if (qe_status & CREG_STAT_RXFOFLOW) {
+		printk(KERN_ERR "%s: Receive fifo overflow.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.rx_over_errors++;
+	}
+
+	if (qe_status & CREG_STAT_RLCOLL) {
+		printk(KERN_ERR "%s: Late receive collision.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.collisions++;
+	}
+
+	if (qe_status & CREG_STAT_FCOFLOW) {
+		qep->net_stats.rx_errors += 256;
+		qep->net_stats.rx_frame_errors += 256;
+	}
+
+	if (qe_status & CREG_STAT_CECOFLOW) {
+		qep->net_stats.rx_errors += 256;
+		qep->net_stats.rx_crc_errors += 256;
+	}
+
+	if (qe_status & CREG_STAT_RXDROP) {
+		printk(KERN_ERR "%s: Receive packet dropped.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.rx_dropped++;
+		qep->net_stats.rx_missed_errors++;
+	}
+
+	if (qe_status & CREG_STAT_RXSMALL) {
+		printk(KERN_ERR "%s: Receive buffer too small, driver bug.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.rx_length_errors++;
+	}
+
+	if (qe_status & CREG_STAT_RXLERR) {
+		printk(KERN_ERR "%s: Receive late error.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_RXPERR) {
+		printk(KERN_ERR "%s: Receive DMA parity error.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.rx_missed_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (qe_status & CREG_STAT_RXSERR) {
+		printk(KERN_ERR "%s: Receive DMA sbus error ack.\n", dev->name);
+		qep->net_stats.rx_errors++;
+		qep->net_stats.rx_missed_errors++;
+		mace_hwbug_workaround = 1;
+	}
+
+	if (mace_hwbug_workaround)
+		qe_init(qep, 1);
+	return mace_hwbug_workaround;
+}
+
+/* Per-QE receive interrupt service routine.  Just like on the happy meal
+ * we receive directly into skb's with a small packet copy water mark.
+ */
+static void qe_rx(struct sunqe *qep)
+{
+	struct qe_rxd *rxbase = &qep->qe_block->qe_rxd[0];
+	struct qe_rxd *this;
+	struct sunqe_buffers *qbufs = qep->buffers;
+	__u32 qbufs_dvma = qep->buffers_dvma;
+	int elem = qep->rx_new, drops = 0;
+	u32 flags;
+
+	this = &rxbase[elem];
+	while (!((flags = this->rx_flags) & RXD_OWN)) {
+		struct sk_buff *skb;
+		unsigned char *this_qbuf =
+			&qbufs->rx_buf[elem & (RX_RING_SIZE - 1)][0];
+		__u32 this_qbuf_dvma = qbufs_dvma +
+			qebuf_offset(rx_buf, (elem & (RX_RING_SIZE - 1)));
+		struct qe_rxd *end_rxd =
+			&rxbase[(elem+RX_RING_SIZE)&(RX_RING_MAXSIZE-1)];
+		int len = (flags & RXD_LENGTH) - 4;  /* QE adds ether FCS size to len */
+
+		/* Check for errors. */
+		if (len < ETH_ZLEN) {
+			qep->net_stats.rx_errors++;
+			qep->net_stats.rx_length_errors++;
+			qep->net_stats.rx_dropped++;
+		} else {
+			skb = dev_alloc_skb(len + 2);
+			if (skb == NULL) {
+				drops++;
+				qep->net_stats.rx_dropped++;
+			} else {
+				skb->dev = qep->dev;
+				skb_reserve(skb, 2);
+				skb_put(skb, len);
+				eth_copy_and_sum(skb, (unsigned char *) this_qbuf,
+						 len, 0);
+				skb->protocol = eth_type_trans(skb, qep->dev);
+				netif_rx(skb);
+				qep->dev->last_rx = jiffies;
+				qep->net_stats.rx_packets++;
+				qep->net_stats.rx_bytes += len;
+			}
+		}
+		end_rxd->rx_addr = this_qbuf_dvma;
+		end_rxd->rx_flags = (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH));
+		
+		elem = NEXT_RX(elem);
+		this = &rxbase[elem];
+	}
+	qep->rx_new = elem;
+	if (drops)
+		printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", qep->dev->name);
+}
+
+static void qe_tx_reclaim(struct sunqe *qep);
+
+/* Interrupts for all QE's get filtered out via the QEC master controller,
+ * so we just run through each qe and check to see who is signaling
+ * and thus needs to be serviced.
+ */
+static irqreturn_t qec_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct sunqec *qecp = (struct sunqec *) dev_id;
+	u32 qec_status;
+	int channel = 0;
+
+	/* Latch the status now. */
+	qec_status = sbus_readl(qecp->gregs + GLOB_STAT);
+	while (channel < 4) {
+		if (qec_status & 0xf) {
+			struct sunqe *qep = qecp->qes[channel];
+			u32 qe_status;
+
+			qe_status = sbus_readl(qep->qcregs + CREG_STAT);
+			if (qe_status & CREG_STAT_ERRORS) {
+				if (qe_is_bolixed(qep, qe_status))
+					goto next;
+			}
+			if (qe_status & CREG_STAT_RXIRQ)
+				qe_rx(qep);
+			if (netif_queue_stopped(qep->dev) &&
+			    (qe_status & CREG_STAT_TXIRQ)) {
+				spin_lock(&qep->lock);
+				qe_tx_reclaim(qep);
+				if (TX_BUFFS_AVAIL(qep) > 0) {
+					/* Wake net queue and return to
+					 * lazy tx reclaim.
+					 */
+					netif_wake_queue(qep->dev);
+					sbus_writel(1, qep->qcregs + CREG_TIMASK);
+				}
+				spin_unlock(&qep->lock);
+			}
+	next:
+			;
+		}
+		qec_status >>= 4;
+		channel++;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int qe_open(struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+
+	qep->mconfig = (MREGS_MCONFIG_TXENAB |
+			MREGS_MCONFIG_RXENAB |
+			MREGS_MCONFIG_MBAENAB);
+	return qe_init(qep, 0);
+}
+
+static int qe_close(struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+
+	qe_stop(qep);
+	return 0;
+}
+
+/* Reclaim TX'd frames from the ring.  This must always run under
+ * the IRQ protected qep->lock.
+ */
+static void qe_tx_reclaim(struct sunqe *qep)
+{
+	struct qe_txd *txbase = &qep->qe_block->qe_txd[0];
+	int elem = qep->tx_old;
+
+	while (elem != qep->tx_new) {
+		u32 flags = txbase[elem].tx_flags;
+
+		if (flags & TXD_OWN)
+			break;
+		elem = NEXT_TX(elem);
+	}
+	qep->tx_old = elem;
+}
+
+static void qe_tx_timeout(struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+	int tx_full;
+
+	spin_lock_irq(&qep->lock);
+
+	/* Try to reclaim, if that frees up some tx
+	 * entries, we're fine.
+	 */
+	qe_tx_reclaim(qep);
+	tx_full = TX_BUFFS_AVAIL(qep) <= 0;
+
+	spin_unlock_irq(&qep->lock);
+
+	if (! tx_full)
+		goto out;
+
+	printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
+	qe_init(qep, 1);
+
+out:
+	netif_wake_queue(dev);
+}
+
+/* Get a packet queued to go onto the wire. */
+static int qe_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+	struct sunqe_buffers *qbufs = qep->buffers;
+	__u32 txbuf_dvma, qbufs_dvma = qep->buffers_dvma;
+	unsigned char *txbuf;
+	int len, entry;
+
+	spin_lock_irq(&qep->lock);
+
+	qe_tx_reclaim(qep);
+
+	len = skb->len;
+	entry = qep->tx_new;
+
+	txbuf = &qbufs->tx_buf[entry & (TX_RING_SIZE - 1)][0];
+	txbuf_dvma = qbufs_dvma +
+		qebuf_offset(tx_buf, (entry & (TX_RING_SIZE - 1)));
+
+	/* Avoid a race... */
+	qep->qe_block->qe_txd[entry].tx_flags = TXD_UPDATE;
+
+	memcpy(txbuf, skb->data, len);
+
+	qep->qe_block->qe_txd[entry].tx_addr = txbuf_dvma;
+	qep->qe_block->qe_txd[entry].tx_flags =
+		(TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
+	qep->tx_new = NEXT_TX(entry);
+
+	/* Get it going. */
+	dev->trans_start = jiffies;
+	sbus_writel(CREG_CTRL_TWAKEUP, qep->qcregs + CREG_CTRL);
+
+	qep->net_stats.tx_packets++;
+	qep->net_stats.tx_bytes += len;
+
+	if (TX_BUFFS_AVAIL(qep) <= 0) {
+		/* Halt the net queue and enable tx interrupts.
+		 * When the tx queue empties the tx irq handler
+		 * will wake up the queue and return us back to
+		 * the lazy tx reclaim scheme.
+		 */
+		netif_stop_queue(dev);
+		sbus_writel(0, qep->qcregs + CREG_TIMASK);
+	}
+	spin_unlock_irq(&qep->lock);
+
+	dev_kfree_skb(skb);
+
+	return 0;
+}
+
+static struct net_device_stats *qe_get_stats(struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+
+	return &qep->net_stats;
+}
+
+static void qe_set_multicast(struct net_device *dev)
+{
+	struct sunqe *qep = (struct sunqe *) dev->priv;
+	struct dev_mc_list *dmi = dev->mc_list;
+	u8 new_mconfig = qep->mconfig;
+	char *addrs;
+	int i;
+	u32 crc;
+
+	/* Lock out others. */
+	netif_stop_queue(dev);
+
+	if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
+		sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
+			    qep->mregs + MREGS_IACONFIG);
+		while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
+			barrier();
+		for (i = 0; i < 8; i++)
+			sbus_writeb(0xff, qep->mregs + MREGS_FILTER);
+		sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
+	} else if (dev->flags & IFF_PROMISC) {
+		new_mconfig |= MREGS_MCONFIG_PROMISC;
+	} else {
+		u16 hash_table[4];
+		u8 *hbytes = (unsigned char *) &hash_table[0];
+
+		for (i = 0; i < 4; i++)
+			hash_table[i] = 0;
+
+		for (i = 0; i < dev->mc_count; i++) {
+			addrs = dmi->dmi_addr;
+			dmi = dmi->next;
+
+			if (!(*addrs & 1))
+				continue;
+			crc = ether_crc_le(6, addrs);
+			crc >>= 26;
+			hash_table[crc >> 4] |= 1 << (crc & 0xf);
+		}
+		/* Program the qe with the new filter value. */
+		sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET,
+			    qep->mregs + MREGS_IACONFIG);
+		while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0)
+			barrier();
+		for (i = 0; i < 8; i++) {
+			u8 tmp = *hbytes++;
+			sbus_writeb(tmp, qep->mregs + MREGS_FILTER);
+		}
+		sbus_writeb(0, qep->mregs + MREGS_IACONFIG);
+	}
+
+	/* Any change of the logical address filter, the physical address,
+	 * or enabling/disabling promiscuous mode causes the MACE to disable
+	 * the receiver.  So we must re-enable them here or else the MACE
+	 * refuses to listen to anything on the network.  Sheesh, took
+	 * me a day or two to find this bug.
+	 */
+	qep->mconfig = new_mconfig;
+	sbus_writeb(qep->mconfig, qep->mregs + MREGS_MCONFIG);
+
+	/* Let us get going again. */
+	netif_wake_queue(dev);
+}
+
+/* Ethtool support... */
+static void qe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+	struct sunqe *qep = dev->priv;
+
+	strcpy(info->driver, "sunqe");
+	strcpy(info->version, "3.0");
+	sprintf(info->bus_info, "SBUS:%d",
+		qep->qe_sdev->slot);
+}
+
+static u32 qe_get_link(struct net_device *dev)
+{
+	struct sunqe *qep = dev->priv;
+	void __iomem *mregs = qep->mregs;
+	u8 phyconfig;
+
+	spin_lock_irq(&qep->lock);
+	phyconfig = sbus_readb(mregs + MREGS_PHYCONFIG);
+	spin_unlock_irq(&qep->lock);
+
+	return (phyconfig & MREGS_PHYCONFIG_LSTAT);
+}
+
+static struct ethtool_ops qe_ethtool_ops = {
+	.get_drvinfo		= qe_get_drvinfo,
+	.get_link		= qe_get_link,
+};
+
+/* This is only called once at boot time for each card probed. */
+static inline void qec_init_once(struct sunqec *qecp, struct sbus_dev *qsdev)
+{
+	u8 bsizes = qecp->qec_bursts;
+
+	if (sbus_can_burst64(qsdev) && (bsizes & DMA_BURST64)) {
+		sbus_writel(GLOB_CTRL_B64, qecp->gregs + GLOB_CTRL);
+	} else if (bsizes & DMA_BURST32) {
+		sbus_writel(GLOB_CTRL_B32, qecp->gregs + GLOB_CTRL);
+	} else {
+		sbus_writel(GLOB_CTRL_B16, qecp->gregs + GLOB_CTRL);
+	}
+
+	/* Packetsize only used in 100baseT BigMAC configurations,
+	 * set it to zero just to be on the safe side.
+	 */
+	sbus_writel(GLOB_PSIZE_2048, qecp->gregs + GLOB_PSIZE);
+
+	/* Set the local memsize register, divided up to one piece per QE channel. */
+	sbus_writel((qsdev->reg_addrs[1].reg_size >> 2),
+		    qecp->gregs + GLOB_MSIZE);
+
+	/* Divide up the local QEC memory amongst the 4 QE receiver and
+	 * transmitter FIFOs.  Basically it is (total / 2 / num_channels).
+	 */
+	sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1,
+		    qecp->gregs + GLOB_TSIZE);
+	sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1,
+		    qecp->gregs + GLOB_RSIZE);
+}
+
+/* Four QE's per QEC card. */
+static int __init qec_ether_init(struct net_device *dev, struct sbus_dev *sdev)
+{
+	static unsigned version_printed;
+	struct net_device *qe_devs[4];
+	struct sunqe *qeps[4];
+	struct sbus_dev *qesdevs[4];
+	struct sbus_dev *child;
+	struct sunqec *qecp = NULL;
+	u8 bsizes, bsizes_more;
+	int i, j, res = -ENOMEM;
+
+	for (i = 0; i < 4; i++) {
+		qe_devs[i] = alloc_etherdev(sizeof(struct sunqe));
+		if (!qe_devs[i])
+			goto out;
+	}
+
+	if (version_printed++ == 0)
+		printk(KERN_INFO "%s", version);
+
+	for (i = 0; i < 4; i++) {
+		qeps[i] = (struct sunqe *) qe_devs[i]->priv;
+		for (j = 0; j < 6; j++)
+			qe_devs[i]->dev_addr[j] = idprom->id_ethaddr[j];
+		qeps[i]->channel = i;
+		spin_lock_init(&qeps[i]->lock);
+	}
+
+	qecp = kmalloc(sizeof(struct sunqec), GFP_KERNEL);
+	if (qecp == NULL)
+		goto out1;
+	qecp->qec_sdev = sdev;
+
+	for (i = 0; i < 4; i++) {
+		qecp->qes[i] = qeps[i];
+		qeps[i]->dev = qe_devs[i];
+		qeps[i]->parent = qecp;
+	}
+
+	res = -ENODEV;
+
+	for (i = 0, child = sdev->child; i < 4; i++, child = child->next) {
+		/* Link in channel */
+		j = prom_getintdefault(child->prom_node, "channel#", -1);
+		if (j == -1)
+			goto out2;
+		qesdevs[j] = child;
+	}
+
+	for (i = 0; i < 4; i++)
+		qeps[i]->qe_sdev = qesdevs[i];
+
+	/* Now map in the registers, QEC globals first. */
+	qecp->gregs = sbus_ioremap(&sdev->resource[0], 0,
+				   GLOB_REG_SIZE, "QEC Global Registers");
+	if (!qecp->gregs) {
+		printk(KERN_ERR "QuadEther: Cannot map QEC global registers.\n");
+		goto out2;
+	}
+
+	/* Make sure the QEC is in MACE mode. */
+	if ((sbus_readl(qecp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_MMODE) {
+		printk(KERN_ERR "QuadEther: AIEEE, QEC is not in MACE mode!\n");
+		goto out3;
+	}
+
+	/* Reset the QEC. */
+	if (qec_global_reset(qecp->gregs))
+		goto out3;
+
+	/* Find and set the burst sizes for the QEC, since it does
+	 * the actual dma for all 4 channels.
+	 */
+	bsizes = prom_getintdefault(sdev->prom_node, "burst-sizes", 0xff);
+	bsizes &= 0xff;
+	bsizes_more = prom_getintdefault(sdev->bus->prom_node, "burst-sizes", 0xff);
+
+	if (bsizes_more != 0xff)
+		bsizes &= bsizes_more;
+	if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
+	   (bsizes & DMA_BURST32)==0)
+		bsizes = (DMA_BURST32 - 1);
+
+	qecp->qec_bursts = bsizes;
+
+	/* Perform one time QEC initialization, we never touch the QEC
+	 * globals again after this.
+	 */
+	qec_init_once(qecp, sdev);
+
+	for (i = 0; i < 4; i++) {
+		struct sunqe *qe = qeps[i];
+		/* Map in QEC per-channel control registers. */
+		qe->qcregs = sbus_ioremap(&qe->qe_sdev->resource[0], 0,
+				       CREG_REG_SIZE, "QEC Channel Registers");
+		if (!qe->qcregs) {
+			printk(KERN_ERR "QuadEther: Cannot map QE %d's channel registers.\n", i);
+			goto out4;
+		}
+
+		/* Map in per-channel AMD MACE registers. */
+		qe->mregs = sbus_ioremap(&qe->qe_sdev->resource[1], 0,
+				      MREGS_REG_SIZE, "QE MACE Registers");
+		if (!qe->mregs) {
+			printk(KERN_ERR "QuadEther: Cannot map QE %d's MACE registers.\n", i);
+			goto out4;
+		}
+
+		qe->qe_block = sbus_alloc_consistent(qe->qe_sdev,
+						  PAGE_SIZE,
+						  &qe->qblock_dvma);
+		qe->buffers = sbus_alloc_consistent(qe->qe_sdev,
+						 sizeof(struct sunqe_buffers),
+						 &qe->buffers_dvma);
+		if (qe->qe_block == NULL || qe->qblock_dvma == 0 ||
+		    qe->buffers == NULL || qe->buffers_dvma == 0) {
+			goto out4;
+		}
+
+		/* Stop this QE. */
+		qe_stop(qe);
+	}
+
+	for (i = 0; i < 4; i++) {
+		SET_MODULE_OWNER(qe_devs[i]);
+		qe_devs[i]->open = qe_open;
+		qe_devs[i]->stop = qe_close;
+		qe_devs[i]->hard_start_xmit = qe_start_xmit;
+		qe_devs[i]->get_stats = qe_get_stats;
+		qe_devs[i]->set_multicast_list = qe_set_multicast;
+		qe_devs[i]->tx_timeout = qe_tx_timeout;
+		qe_devs[i]->watchdog_timeo = 5*HZ;
+		qe_devs[i]->irq = sdev->irqs[0];
+		qe_devs[i]->dma = 0;
+		qe_devs[i]->ethtool_ops = &qe_ethtool_ops;
+	}
+
+	/* QEC receives interrupts from each QE, then it sends the actual
+	 * IRQ to the cpu itself.  Since QEC is the single point of
+	 * interrupt for all QE channels we register the IRQ handler
+	 * for it now.
+	 */
+	if (request_irq(sdev->irqs[0], &qec_interrupt,
+			SA_SHIRQ, "QuadEther", (void *) qecp)) {
+		printk(KERN_ERR "QuadEther: Can't register QEC master irq handler.\n");
+		res = -EAGAIN;
+		goto out4;
+	}
+
+	for (i = 0; i < 4; i++) {
+		if (register_netdev(qe_devs[i]) != 0)
+			goto out5;
+	}
+
+	/* Report the QE channels. */
+	for (i = 0; i < 4; i++) {
+		printk(KERN_INFO "%s: QuadEthernet channel[%d] ", qe_devs[i]->name, i);
+		for (j = 0; j < 6; j++)
+			printk ("%2.2x%c",
+				qe_devs[i]->dev_addr[j],
+				j == 5 ? ' ': ':');
+		printk("\n");
+	}
+
+	/* We are home free at this point, link the qe's into
+	 * the master list for later driver exit.
+	 */
+	qecp->next_module = root_qec_dev;
+	root_qec_dev = qecp;
+
+	return 0;
+
+out5:
+	while (i--)
+		unregister_netdev(qe_devs[i]);
+	free_irq(sdev->irqs[0], (void *)qecp);
+out4:
+	for (i = 0; i < 4; i++) {
+		struct sunqe *qe = (struct sunqe *)qe_devs[i]->priv;
+
+		if (qe->qcregs)
+			sbus_iounmap(qe->qcregs, CREG_REG_SIZE);
+		if (qe->mregs)
+			sbus_iounmap(qe->mregs, MREGS_REG_SIZE);
+		if (qe->qe_block)
+			sbus_free_consistent(qe->qe_sdev,
+					     PAGE_SIZE,
+					     qe->qe_block,
+					     qe->qblock_dvma);
+		if (qe->buffers)
+			sbus_free_consistent(qe->qe_sdev,
+					     sizeof(struct sunqe_buffers),
+					     qe->buffers,
+					     qe->buffers_dvma);
+	}
+out3:
+	sbus_iounmap(qecp->gregs, GLOB_REG_SIZE);
+out2:
+	kfree(qecp);
+out1:
+	i = 4;
+out:
+	while (i--)
+		free_netdev(qe_devs[i]);
+	return res;
+}
+
+static int __init qec_match(struct sbus_dev *sdev)
+{
+	struct sbus_dev *sibling;
+	int i;
+
+	if (strcmp(sdev->prom_name, "qec") != 0)
+		return 0;
+
+	/* QEC can be parent of either QuadEthernet or BigMAC
+	 * children.  Do not confuse this with qfe/SUNW,qfe
+	 * which is a quad-happymeal card and handled by
+	 * a different driver.
+	 */
+	sibling = sdev->child;
+	for (i = 0; i < 4; i++) {
+		if (sibling == NULL)
+			return 0;
+		if (strcmp(sibling->prom_name, "qe") != 0)
+			return 0;
+		sibling = sibling->next;
+	}
+	return 1;
+}
+
+static int __init qec_probe(void)
+{
+	struct net_device *dev = NULL;
+	struct sbus_bus *bus;
+	struct sbus_dev *sdev = NULL;
+	static int called;
+	int cards = 0, v;
+
+	root_qec_dev = NULL;
+
+	if (called)
+		return -ENODEV;
+	called++;
+
+	for_each_sbus(bus) {
+		for_each_sbusdev(sdev, bus) {
+			if (cards)
+				dev = NULL;
+
+			if (qec_match(sdev)) {
+				cards++;
+				if ((v = qec_ether_init(dev, sdev)))
+					return v;
+			}
+		}
+	}
+	if (!cards)
+		return -ENODEV;
+	return 0;
+}
+
+static void __exit qec_cleanup(void)
+{
+	struct sunqec *next_qec;
+	int i;
+
+	while (root_qec_dev) {
+		next_qec = root_qec_dev->next_module;
+
+		/* Release all four QE channels, then the QEC itself. */
+		for (i = 0; i < 4; i++) {
+			unregister_netdev(root_qec_dev->qes[i]->dev);
+			sbus_iounmap(root_qec_dev->qes[i]->qcregs, CREG_REG_SIZE);
+			sbus_iounmap(root_qec_dev->qes[i]->mregs, MREGS_REG_SIZE);
+			sbus_free_consistent(root_qec_dev->qes[i]->qe_sdev,
+					     PAGE_SIZE,
+					     root_qec_dev->qes[i]->qe_block,
+					     root_qec_dev->qes[i]->qblock_dvma);
+			sbus_free_consistent(root_qec_dev->qes[i]->qe_sdev,
+					     sizeof(struct sunqe_buffers),
+					     root_qec_dev->qes[i]->buffers,
+					     root_qec_dev->qes[i]->buffers_dvma);
+			free_netdev(root_qec_dev->qes[i]->dev);
+		}
+		free_irq(root_qec_dev->qec_sdev->irqs[0], (void *)root_qec_dev);
+		sbus_iounmap(root_qec_dev->gregs, GLOB_REG_SIZE);
+		kfree(root_qec_dev);
+		root_qec_dev = next_qec;
+	}
+}
+
+module_init(qec_probe);
+module_exit(qec_cleanup);
+MODULE_LICENSE("GPL");