/* ----------------------------------------------------------------------------
mace_interrupt
The interrupt handler.
---------------------------------------------------------------------------- */
static irqreturn_t mace_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
mace_private *lp = netdev_priv(dev);
unsigned int ioaddr;
int status;
int IntrCnt = MACE_MAX_IR_ITERATIONS;
if (dev == NULL) {
pr_debug("mace_interrupt(): irq 0x%X for unknown device.\n",
irq);
return IRQ_NONE;
}
ioaddr = dev->base_addr;
if (lp->tx_irq_disabled) {
const char *msg;
if (lp->tx_irq_disabled)
msg = "Interrupt with tx_irq_disabled";
else
msg = "Re-entering the interrupt handler";
netdev_notice(dev, "%s [isr=%02X, imr=%02X]\n",
msg,
inb(ioaddr + AM2150_MACE_BASE + MACE_IR),
inb(ioaddr + AM2150_MACE_BASE + MACE_IMR));
/* WARNING: MACE_IR has been read! */
return IRQ_NONE;
}
if (!netif_device_present(dev)) {
netdev_dbg(dev, "interrupt from dead card\n");
return IRQ_NONE;
}
do {
/* WARNING: MACE_IR is a READ/CLEAR port! */
status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR);
pr_debug("mace_interrupt: irq 0x%X status 0x%X.\n", irq, status);
if (status & MACE_IR_RCVINT) {
mace_rx(dev, MACE_MAX_RX_ITERATIONS);
}
if (status & MACE_IR_XMTINT) {
unsigned char fifofc;
unsigned char xmtrc;
unsigned char xmtfs;
fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC);
if ((fifofc & MACE_FIFOFC_XMTFC)==0) {
lp->linux_stats.tx_errors++;
outb(0xFF, ioaddr + AM2150_XMT_SKIP);
}
/* ----------------------------------------------------------------------------
mace_interrupt
The interrupt handler.
---------------------------------------------------------------------------- */
static irqreturn_t mace_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
mace_private *lp = netdev_priv(dev);
kio_addr_t ioaddr;
int status;
int IntrCnt = MACE_MAX_IR_ITERATIONS;
if (dev == NULL) {
DEBUG(2, "mace_interrupt(): irq 0x%X for unknown device.\n",
irq);
return IRQ_NONE;
}
ioaddr = dev->base_addr;
if (lp->tx_irq_disabled) {
printk(
(lp->tx_irq_disabled?
KERN_NOTICE "%s: Interrupt with tx_irq_disabled "
"[isr=%02X, imr=%02X]\n":
KERN_NOTICE "%s: Re-entering the interrupt handler "
"[isr=%02X, imr=%02X]\n"),
dev->name,
inb(ioaddr + AM2150_MACE_BASE + MACE_IR),
inb(ioaddr + AM2150_MACE_BASE + MACE_IMR)
);
/* WARNING: MACE_IR has been read! */
return IRQ_NONE;
}
if (!netif_device_present(dev)) {
DEBUG(2, "%s: interrupt from dead card\n", dev->name);
return IRQ_NONE;
}
do {
/* WARNING: MACE_IR is a READ/CLEAR port! */
status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR);
DEBUG(3, "mace_interrupt: irq 0x%X status 0x%X.\n", irq, status);
if (status & MACE_IR_RCVINT) {
mace_rx(dev, MACE_MAX_RX_ITERATIONS);
}
if (status & MACE_IR_XMTINT) {
unsigned char fifofc;
unsigned char xmtrc;
unsigned char xmtfs;
fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC);
if ((fifofc & MACE_FIFOFC_XMTFC)==0) {
lp->linux_stats.tx_errors++;
outb(0xFF, ioaddr + AM2150_XMT_SKIP);
}
/* Transmit Retry Count (XMTRC, reg 4) */
xmtrc = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTRC);
if (xmtrc & MACE_XMTRC_EXDEF) lp->mace_stats.exdef++;
lp->mace_stats.xmtrc += (xmtrc & MACE_XMTRC_XMTRC);
if (
(xmtfs = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTFS)) &
MACE_XMTFS_XMTSV /* Transmit Status Valid */
) {
lp->mace_stats.xmtsv++;
if (xmtfs & ~MACE_XMTFS_XMTSV) {
if (xmtfs & MACE_XMTFS_UFLO) {
/* Underflow. Indicates that the Transmit FIFO emptied before
the end of frame was reached. */
lp->mace_stats.uflo++;
}
if (xmtfs & MACE_XMTFS_LCOL) {
/* Late Collision */
lp->mace_stats.lcol++;
}
if (xmtfs & MACE_XMTFS_MORE) {
/* MORE than one retry was needed */
lp->mace_stats.more++;
}
if (xmtfs & MACE_XMTFS_ONE) {
/* Exactly ONE retry occurred */
lp->mace_stats.one++;
}
if (xmtfs & MACE_XMTFS_DEFER) {
/* Transmission was defered */
lp->mace_stats.defer++;
}
if (xmtfs & MACE_XMTFS_LCAR) {
/* Loss of carrier */
lp->mace_stats.lcar++;
}
if (xmtfs & MACE_XMTFS_RTRY) {
/* Retry error: transmit aborted after 16 attempts */
lp->mace_stats.rtry++;
}
} /* if (xmtfs & ~MACE_XMTFS_XMTSV) */
} /* if (xmtfs & MACE_XMTFS_XMTSV) */
lp->linux_stats.tx_packets++;
lp->tx_free_frames++;
netif_wake_queue(dev);
} /* if (status & MACE_IR_XMTINT) */
if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) {
if (status & MACE_IR_JAB) {
/* Jabber Error. Excessive transmit duration (20-150ms). */
lp->mace_stats.jab++;
}
if (status & MACE_IR_BABL) {
/* Babble Error. >1518 bytes transmitted. */
lp->mace_stats.babl++;
}
if (status & MACE_IR_CERR) {
/* Collision Error. CERR indicates the absence of the
Signal Quality Error Test message after a packet
transmission. */
lp->mace_stats.cerr++;
}
if (status & MACE_IR_RCVCCO) {
/* Receive Collision Count Overflow; */
lp->mace_stats.rcvcco++;
}
if (status & MACE_IR_RNTPCO) {
/* Runt Packet Count Overflow */
lp->mace_stats.rntpco++;
}
if (status & MACE_IR_MPCO) {
/* Missed Packet Count Overflow */
lp->mace_stats.mpco++;
}
} /* if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) */
} while ((status & ~MACE_IMR_DEFAULT) && (--IntrCnt));
return IRQ_HANDLED;
} /* mace_interrupt */
