static irqreturn_t ariadne_interrupt(int irq, void *data)
{
struct net_device *dev = (struct net_device *)data;
volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
struct ariadne_private *priv;
int csr0, boguscnt;
int handled = 0;
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
return IRQ_NONE; /* generated by the board */
priv = netdev_priv(dev);
boguscnt = 10;
while ((csr0 = lance->RDP) & (ERR | RINT | TINT) && --boguscnt >= 0) {
/* Acknowledge all of the current interrupt sources ASAP */
lance->RDP = csr0 & ~(INEA | TDMD | STOP | STRT | INIT);
#ifdef DEBUG
if (ariadne_debug > 5) {
netdev_dbg(dev, "interrupt csr0=%#02x new csr=%#02x [",
csr0, lance->RDP);
if (csr0 & INTR)
pr_cont(" INTR");
if (csr0 & INEA)
pr_cont(" INEA");
if (csr0 & RXON)
pr_cont(" RXON");
if (csr0 & TXON)
pr_cont(" TXON");
if (csr0 & TDMD)
pr_cont(" TDMD");
if (csr0 & STOP)
pr_cont(" STOP");
if (csr0 & STRT)
pr_cont(" STRT");
if (csr0 & INIT)
pr_cont(" INIT");
if (csr0 & ERR)
pr_cont(" ERR");
if (csr0 & BABL)
pr_cont(" BABL");
if (csr0 & CERR)
pr_cont(" CERR");
if (csr0 & MISS)
pr_cont(" MISS");
if (csr0 & MERR)
pr_cont(" MERR");
if (csr0 & RINT)
pr_cont(" RINT");
if (csr0 & TINT)
pr_cont(" TINT");
if (csr0 & IDON)
pr_cont(" IDON");
pr_cont(" ]\n");
}
#endif
if (csr0 & RINT) { /* Rx interrupt */
handled = 1;
ariadne_rx(dev);
}
if (csr0 & TINT) { /* Tx-done interrupt */
int dirty_tx = priv->dirty_tx;
handled = 1;
while (dirty_tx < priv->cur_tx) {
int entry = dirty_tx % TX_RING_SIZE;
int status = lowb(priv->tx_ring[entry]->TMD1);
if (status & TF_OWN)
break; /* It still hasn't been Txed */
priv->tx_ring[entry]->TMD1 &= 0xff00;
if (status & TF_ERR) {
/* There was an major error, log it */
int err_status = priv->tx_ring[entry]->TMD3;
dev->stats.tx_errors++;
if (err_status & EF_RTRY)
dev->stats.tx_aborted_errors++;
if (err_status & EF_LCAR)
dev->stats.tx_carrier_errors++;
if (err_status & EF_LCOL)
dev->stats.tx_window_errors++;
if (err_status & EF_UFLO) {
/* Ackk! On FIFO errors the Tx unit is turned off! */
dev->stats.tx_fifo_errors++;
/* Remove this verbosity later! */
netdev_err(dev, "Tx FIFO error! Status %04x\n",
csr0);
/* Restart the chip */
lance->RDP = STRT;
}
} else {
if (status & (TF_MORE | TF_ONE))
dev->stats.collisions++;
dev->stats.tx_packets++;
}
dirty_tx++;
}
#ifndef final_version
if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
netdev_err(dev, "out-of-sync dirty pointer, %d vs. %d, full=%d\n",
dirty_tx, priv->cur_tx,
priv->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
if (priv->tx_full && netif_queue_stopped(dev) &&
dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
/* The ring is no longer full */
priv->tx_full = 0;
netif_wake_queue(dev);
}
priv->dirty_tx = dirty_tx;
}
/* Log misc errors */
if (csr0 & BABL) {
handled = 1;
dev->stats.tx_errors++; /* Tx babble */
}
if (csr0 & MISS) {
handled = 1;
dev->stats.rx_errors++; /* Missed a Rx frame */
}
if (csr0 & MERR) {
handled = 1;
netdev_err(dev, "Bus master arbitration failure, status %04x\n",
csr0);
/* Restart the chip */
lance->RDP = STRT;
}
}
/* Clear any other interrupt, and set interrupt enable */
lance->RAP = CSR0; /* PCnet-ISA Controller Status */
lance->RDP = INEA | BABL | CERR | MISS | MERR | IDON;
if (ariadne_debug > 4)
netdev_dbg(dev, "exiting interrupt, csr%d=%#04x\n",
lance->RAP, lance->RDP);
return IRQ_RETVAL(handled);
}
void add(int i, int v){
for (; i < n; val[i] += v, i += lowb(i));
}
static int ariadne_rx(struct net_device *dev)
{
struct ariadne_private *priv = netdev_priv(dev);
int entry = priv->cur_rx % RX_RING_SIZE;
int i;
/* If we own the next entry, it's a new packet. Send it up */
while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
int status = lowb(priv->rx_ring[entry]->RMD1);
if (status != (RF_STP | RF_ENP)) { /* There was an error */
/* There is a tricky error noted by
* John Murphy <*****@*****.**> to Russ Nelson:
* Even with full-sized buffers it's possible for a
* jabber packet to use two buffers, with only the
* last correctly noting the error
*/
/* Only count a general error at the end of a packet */
if (status & RF_ENP)
dev->stats.rx_errors++;
if (status & RF_FRAM)
dev->stats.rx_frame_errors++;
if (status & RF_OFLO)
dev->stats.rx_over_errors++;
if (status & RF_CRC)
dev->stats.rx_crc_errors++;
if (status & RF_BUFF)
dev->stats.rx_fifo_errors++;
priv->rx_ring[entry]->RMD1 &= 0xff00 | RF_STP | RF_ENP;
} else {
/* Malloc up new buffer, compatible with net-3 */
short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
struct sk_buff *skb;
skb = dev_alloc_skb(pkt_len + 2);
if (skb == NULL) {
netdev_warn(dev, "Memory squeeze, deferring packet\n");
for (i = 0; i < RX_RING_SIZE; i++)
if (lowb(priv->rx_ring[(entry + i) % RX_RING_SIZE]->RMD1) & RF_OWN)
break;
if (i > RX_RING_SIZE - 2) {
dev->stats.rx_dropped++;
priv->rx_ring[entry]->RMD1 |= RF_OWN;
priv->cur_rx++;
}
break;
}
skb_reserve(skb, 2); /* 16 byte align */
skb_put(skb, pkt_len); /* Make room */
skb_copy_to_linear_data(skb,
(const void *)priv->rx_buff[entry],
pkt_len);
skb->protocol = eth_type_trans(skb, dev);
netdev_dbg(dev, "RX pkt type 0x%04x from %pM to %pM data 0x%08x len %d\n",
((u_short *)skb->data)[6],
skb->data + 6, skb->data,
(int)skb->data, (int)skb->len);
netif_rx(skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += pkt_len;
}
priv->rx_ring[entry]->RMD1 |= RF_OWN;
entry = (++priv->cur_rx) % RX_RING_SIZE;
}
priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
/* We should check that at least two ring entries are free.
* If not, we should free one and mark stats->rx_dropped++
*/
return 0;
}
typev query(int i){
typev s = 0;
for (; i > 0; s += val[i], i -= lowb(i));
return s;
}
