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m68k: Mac89x0 Ethernet netif updates 

Macintosh CS89x0 Ethernet: Netif updates
Addition of netif_stop_queue() before transmission by Michael Schmitz
skb_copy_{from,to}_linear_data() conversion by Geert Uytterhoeven

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Urlichs 2007-05-01 22:32:41 +02:00 committed by Linus Torvalds
parent ec0203e753
commit 39ad2cb352
2 changed files with 33 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/Kconfig
View File

@ -311,7 +311,7 @@ config MAC8390
config MAC89x0
tristate "Macintosh CS89x0 based ethernet cards"
depends on NET_ETHERNET && MAC && BROKEN
depends on NET_ETHERNET && MAC
---help---
Support for CS89x0 chipset based Ethernet cards. If you have a
Nubus or LC-PDS network (Ethernet) card of this type, say Y and

88
drivers/net/mac89x0.c
View File

@ -128,7 +128,7 @@ struct net_local {
extern void reset_chip(struct net_device *dev);
#endif
static int net_open(struct net_device *dev);
static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t net_interrupt(int irq, void *dev_id);
static void set_multicast_list(struct net_device *dev);
static void net_rx(struct net_device *dev);
@ -374,56 +374,39 @@ net_open(struct net_device *dev)
static int
net_send_packet(struct sk_buff *skb, struct net_device *dev)
{
if (dev->tbusy) {
/* If we get here, some higher level has decided we are broken.
There should really be a "kick me" function call instead. */
int tickssofar = jiffies - dev->trans_start;
if (tickssofar < 5)
return 1;
if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
tx_done(dev) ? "IRQ conflict" : "network cable problem");
/* Try to restart the adaptor. */
dev->tbusy=0;
dev->trans_start = jiffies;
}
struct net_local *lp = netdev_priv(dev);
unsigned long flags;
/* Block a timer-based transmit from overlapping. This could better be
done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
if (test_and_set_bit(0, (void*)&dev->tbusy) != 0)
printk("%s: Transmitter access conflict.\n", dev->name);
else {
struct net_local *lp = netdev_priv(dev);
unsigned long flags;
if (net_debug > 3)
printk("%s: sent %d byte packet of type %x\n",
dev->name, skb->len,
(skb->data[ETH_ALEN+ETH_ALEN] << 8)
| skb->data[ETH_ALEN+ETH_ALEN+1]);
if (net_debug > 3)
printk("%s: sent %d byte packet of type %x\n",
dev->name, skb->len,
(skb->data[ETH_ALEN+ETH_ALEN] << 8)
| skb->data[ETH_ALEN+ETH_ALEN+1]);
/* keep the upload from being interrupted, since we
ask the chip to start transmitting before the
whole packet has been completely uploaded. */
local_irq_save(flags);
netif_stop_queue(dev);
/* keep the upload from being interrupted, since we
ask the chip to start transmitting before the
whole packet has been completely uploaded. */
local_irq_save(flags);
/* initiate a transmit sequence */
writereg(dev, PP_TxCMD, lp->send_cmd);
writereg(dev, PP_TxLength, skb->len);
/* Test to see if the chip has allocated memory for the packet */
if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
/* Gasp! It hasn't. But that shouldn't happen since
we're waiting for TxOk, so return 1 and requeue this packet. */
local_irq_restore(flags);
return 1;
}
/* Write the contents of the packet */
memcpy_toio(dev->mem_start + PP_TxFrame, skb->data, skb->len+1);
/* initiate a transmit sequence */
writereg(dev, PP_TxCMD, lp->send_cmd);
writereg(dev, PP_TxLength, skb->len);
/* Test to see if the chip has allocated memory for the packet */
if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
/* Gasp! It hasn't. But that shouldn't happen since
we're waiting for TxOk, so return 1 and requeue this packet. */
local_irq_restore(flags);
dev->trans_start = jiffies;
return 1;
}
/* Write the contents of the packet */
skb_copy_from_linear_data(skb, (void *)(dev->mem_start + PP_TxFrame),
skb->len+1);
local_irq_restore(flags);
dev->trans_start = jiffies;
dev_kfree_skb (skb);
return 0;
@ -441,9 +424,6 @@ static irqreturn_t net_interrupt(int irq, void *dev_id)
printk ("net_interrupt(): irq %d for unknown device.\n", irq);
return IRQ_NONE;
}
if (dev->interrupt)
printk("%s: Re-entering the interrupt handler.\n", dev->name);
dev->interrupt = 1;
ioaddr = dev->base_addr;
lp = netdev_priv(dev);
@ -464,8 +444,7 @@ static irqreturn_t net_interrupt(int irq, void *dev_id)
break;
case ISQ_TRANSMITTER_EVENT:
lp->stats.tx_packets++;
dev->tbusy = 0;
mark_bh(NET_BH); /* Inform upper layers. */
netif_wake_queue(dev);
if ((status & TX_OK) == 0) lp->stats.tx_errors++;
if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
@ -479,8 +458,7 @@ static irqreturn_t net_interrupt(int irq, void *dev_id)
That shouldn't happen since we only ever
load one packet. Shrug. Do the right
thing anyway. */
dev->tbusy = 0;
mark_bh(NET_BH); /* Inform upper layers. */
netif_wake_queue(dev);
}
if (status & TX_UNDERRUN) {
if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
@ -497,7 +475,6 @@ static irqreturn_t net_interrupt(int irq, void *dev_id)
break;
}
}
dev->interrupt = 0;
return IRQ_HANDLED;
}
@ -531,7 +508,8 @@ net_rx(struct net_device *dev)
}
skb_put(skb, length);
memcpy_fromio(skb->data, dev->mem_start + PP_RxFrame, length);
skb_copy_to_linear_data(skb, (void *)(dev->mem_start + PP_RxFrame),
length);
if (net_debug > 3)printk("%s: received %d byte packet of type %x\n",
dev->name, length,
@ -610,8 +588,6 @@ static void set_multicast_list(struct net_device *dev)
static int set_mac_address(struct net_device *dev, void *addr)
{
int i;
if (dev->start)
return -EBUSY;
printk("%s: Setting MAC address to ", dev->name);
for (i = 0; i < 6; i++)
printk(" %2.2x", dev->dev_addr[i] = ((unsigned char *)addr)[i]);