sunqe.c
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上传日期:2013-04-10
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- /* $Id: sunqe.c,v 1.52.2.1 2001/12/21 00:52:47 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 David S. Miller (davem@redhat.com)
- */
- static char version[] =
- "sunqe.c:v2.9 9/11/99 David S. Miller (davem@redhat.com)n";
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.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 <asm/system.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/dma.h>
- #include <linux/errno.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 <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.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(unsigned long 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)
- {
- unsigned long cregs = qep->qcregs;
- unsigned long 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;
- unsigned long cregs = qep->qcregs;
- unsigned long mregs = qep->mregs;
- unsigned long 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 void 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++;
- }
- }
- 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, resettingn", 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);
- }
- /* 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 sunqec *qecp = NULL;
- u8 bsizes, bsizes_more;
- int i, j, res = ENOMEM;
- dev = init_etherdev(0, sizeof(struct sunqe));
- qe_devs[0] = dev;
- qeps[0] = (struct sunqe *) dev->priv;
- qeps[0]->channel = 0;
- spin_lock_init(&qeps[0]->lock);
- for (j = 0; j < 6; j++)
- qe_devs[0]->dev_addr[j] = idprom->id_ethaddr[j];
- if (version_printed++ == 0)
- printk(KERN_INFO "%s", version);
- qe_devs[1] = qe_devs[2] = qe_devs[3] = NULL;
- for (i = 1; i < 4; i++) {
- qe_devs[i] = init_etherdev(0, sizeof(struct sunqe));
- if (qe_devs[i] == NULL || qe_devs[i]->priv == NULL)
- goto qec_free_devs;
- 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;
- }
- qecp = kmalloc(sizeof(struct sunqec), GFP_KERNEL);
- if (qecp == NULL)
- goto qec_free_devs;
- 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;
- }
- /* Link in channel 0. */
- i = prom_getintdefault(sdev->child->prom_node, "channel#", -1);
- if (i == -1) { res=ENODEV; goto qec_free_devs; }
- qesdevs[i] = sdev->child;
- /* Link in channel 1. */
- i = prom_getintdefault(sdev->child->next->prom_node, "channel#", -1);
- if (i == -1) { res=ENODEV; goto qec_free_devs; }
- qesdevs[i] = sdev->child->next;
- /* Link in channel 2. */
- i = prom_getintdefault(sdev->child->next->next->prom_node, "channel#", -1);
- if (i == -1) { res=ENODEV; goto qec_free_devs; }
- qesdevs[i] = sdev->child->next->next;
- /* Link in channel 3. */
- i = prom_getintdefault(sdev->child->next->next->next->prom_node, "channel#", -1);
- if (i == -1) { res=ENODEV; goto qec_free_devs; }
- qesdevs[i] = sdev->child->next->next->next;
- 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");
- res = ENODEV;
- goto qec_free_devs;
- }
- /* 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");
- res = ENODEV;
- goto qec_free_devs;
- }
- /* Reset the QEC. */
- if (qec_global_reset(qecp->gregs)) {
- res = ENODEV;
- goto qec_free_devs;
- }
- /* 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++) {
- /* Map in QEC per-channel control registers. */
- qeps[i]->qcregs = sbus_ioremap(&qesdevs[i]->resource[0], 0,
- CREG_REG_SIZE, "QEC Channel Registers");
- if (!qeps[i]->qcregs) {
- printk(KERN_ERR "QuadEther: Cannot map QE %d's channel registers.n", i);
- res = ENODEV;
- goto qec_free_devs;
- }
- /* Map in per-channel AMD MACE registers. */
- qeps[i]->mregs = sbus_ioremap(&qesdevs[i]->resource[1], 0,
- MREGS_REG_SIZE, "QE MACE Registers");
- if (!qeps[i]->mregs) {
- printk(KERN_ERR "QuadEther: Cannot map QE %d's MACE registers.n", i);
- res = ENODEV;
- goto qec_free_devs;
- }
- qeps[i]->qe_block = sbus_alloc_consistent(qesdevs[i],
- PAGE_SIZE,
- &qeps[i]->qblock_dvma);
- qeps[i]->buffers = sbus_alloc_consistent(qesdevs[i],
- sizeof(struct sunqe_buffers),
- &qeps[i]->buffers_dvma);
- if (qeps[i]->qe_block == NULL ||
- qeps[i]->qblock_dvma == 0 ||
- qeps[i]->buffers == NULL ||
- qeps[i]->buffers_dvma == 0) {
- res = ENODEV;
- goto qec_free_devs;
- }
- /* Stop this QE. */
- qe_stop(qeps[i]);
- }
- 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;
- ether_setup(qe_devs[i]);
- }
- /* 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 qec_free_devs;
- }
- /* 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.
- */
- for (i = 0; i < 4; i++)
- qe_devs[i]->ifindex = dev_new_index();
- qecp->next_module = root_qec_dev;
- root_qec_dev = qecp;
- return 0;
- qec_free_devs:
- for (i = 0; i < 4; i++) {
- if (qe_devs[i] != NULL) {
- if (qe_devs[i]->priv) {
- 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 != NULL)
- sbus_free_consistent(qe->qe_sdev,
- PAGE_SIZE,
- qe->qe_block,
- qe->qblock_dvma);
- if (qe->buffers != NULL)
- sbus_free_consistent(qe->qe_sdev,
- sizeof(struct sunqe_buffers),
- qe->buffers,
- qe->buffers_dvma);
- kfree(qe_devs[i]->priv);
- }
- kfree(qe_devs[i]);
- }
- }
- if (qecp != NULL) {
- if (qecp->gregs)
- sbus_iounmap(qecp->gregs, GLOB_REG_SIZE);
- kfree(qecp);
- }
- 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 = 0;
- 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);
- kfree(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");