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kernel-ark/drivers/net/sunqe.c
Linus Torvalds 1da177e4c3 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!
2005-04-16 15:20:36 -07:00

1044 lines
27 KiB
C
Raw Blame History

/* $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");
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